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1

MOUNTAIN-SCALE COUPLED PROCESSES (TH/THC/THM)MODELS  

SciTech Connect

This report documents the development and validation of the mountain-scale thermal-hydrologic (TH), thermal-hydrologic-chemical (THC), and thermal-hydrologic-mechanical (THM) models. These models provide technical support for screening of features, events, and processes (FEPs) related to the effects of coupled TH/THC/THM processes on mountain-scale unsaturated zone (UZ) and saturated zone (SZ) flow at Yucca Mountain, Nevada (BSC 2005 [DIRS 174842], Section 2.1.1.1). The purpose and validation criteria for these models are specified in ''Technical Work Plan for: Near-Field Environment and Transport: Coupled Processes (Mountain-Scale TH/THC/THM, Drift-Scale THC Seepage, and Drift-Scale Abstraction) Model Report Integration'' (BSC 2005 [DIRS 174842]). Model results are used to support exclusion of certain FEPs from the total system performance assessment for the license application (TSPA-LA) model on the basis of low consequence, consistent with the requirements of 10 CFR 63.342 [DIRS 173273]. Outputs from this report are not direct feeds to the TSPA-LA. All the FEPs related to the effects of coupled TH/THC/THM processes on mountain-scale UZ and SZ flow are discussed in Sections 6 and 7 of this report. The mountain-scale coupled TH/THC/THM processes models numerically simulate the impact of nuclear waste heat release on the natural hydrogeological system, including a representation of heat-driven processes occurring in the far field. The mountain-scale TH simulations provide predictions for thermally affected liquid saturation, gas- and liquid-phase fluxes, and water and rock temperature (together called the flow fields). The main focus of the TH model is to predict the changes in water flux driven by evaporation/condensation processes, and drainage between drifts. The TH model captures mountain-scale three-dimensional flow effects, including lateral diversion and mountain-scale flow patterns. The mountain-scale THC model evaluates TH effects on water and gas chemistry, mineral dissolution/precipitation, and the resulting impact to UZ hydrologic properties, flow and transport. The mountain-scale THM model addresses changes in permeability due to mechanical and thermal disturbances in stratigraphic units above and below the repository host rock. The THM model focuses on evaluating the changes in UZ flow fields arising out of thermal stress and rock deformation during and after the thermal period (the period during which temperatures in the mountain are significantly higher than ambient temperatures).

Y.S. Wu

2005-08-24T23:59:59.000Z

2

Opportunities in geophysics  

Science Conference Proceedings (OSTI)

What are the chances of a physicist finding an agreeable job in geophysics? The apparently poor prospects for jobs in academic physics led me to explore the possibilities in geophysics; this field

H. Richard Crane

1971-01-01T23:59:59.000Z

3

Geophysics I. Seismic Methods  

SciTech Connect

During the past two decades, the technology of geophysics has exploded. At the same time, the petroleum industry has been forced to look for more and more subtle traps in more and more difficult terrain. The choice of papers in this geophysics reprint volume reflects this evolution. The papers were chosen to help geologists, not geophysicists, enhance their knowledge of geophysics. Math-intensive papers were excluded because those papers are relatively esoteric and have limited applicability for most geologists. This volume concentrates on different seismic survey methods. Each of the 38 papers were abstracted and indexed for the U.S. Department of Energy's Energy Data Base.

Beaumont, E.A.; Foster, N.H. (comps.)

1989-01-01T23:59:59.000Z

4

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-01-01T23:59:59.000Z

5

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-12-31T23:59:59.000Z

6

Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geophysical Techniques Geophysical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geophysical Techniques Details Activities (2) Areas (1) Regions (0) NEPA(4) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: may be inferred Stratigraphic/Structural: may be inferred Hydrological: may be inferred Thermal: may be inferred Dictionary.png Geophysical Techniques: Geophysics is the study of the structure and composition of the earth's interior. Other definitions:Wikipedia Reegle Introduction Geophysical techniques measure physical phenomena of the earth such as gravity, magnetism, elastic waves, electrical and electromagnetic waves.

7

Geophysical Methods | Open Energy Information  

Open Energy Info (EERE)

Geophysical Methods Geophysical Methods Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geophysical Methods Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Geophysical Techniques Parent Exploration Technique: Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Geophysical Methods: Methods used to measure the physical properties of the earth Other definitions:Wikipedia Reegle Introduction There are five main types of geophysical methods used for geothermal resource discovery: Seismic Methods (active and passive) Electrical Methods Magnetic Methods Gravity Methods Radiometric Methods Seismic methods dominates oil and gas exploration, and probably accounts

8

Particle Filtering in Geophysical Systems  

Science Conference Proceedings (OSTI)

The application of particle filters in geophysical systems is reviewed. Some background on Bayesian filtering is provided, and the existing methods are discussed. The emphasis is on the methodology, and not so much on the applications themselves. ...

Peter Jan van Leeuwen

2009-12-01T23:59:59.000Z

9

Available Energy of Geophysical Systems  

Science Conference Proceedings (OSTI)

An alternative derivation of the available energy for a geophysical fluid system is presented. It is shown that determination of the equilibrium temperature of the system by the minimization of an energy availability function is equivalent to that ...

Peter R. Bannon

2013-08-01T23:59:59.000Z

10

Definition: Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Geophysical Techniques Jump to: navigation, search Dictionary.png Geophysical Techniques Geophysics is the study of the structure and composition of the earth's interior.[1] View on Wikipedia Wikipedia Definition Exploration geophysics is the applied branch of geophysics which uses surface methods to measure the physical properties of the subsurface Earth, along with the anomalies in these properties, in order to detect or infer the presence and position of ore minerals, hydrocarbons, geothermal reservoirs, groundwater reservoirs, and other geological structures. Exploration geophysics is the practical application of physical methods (such as seismic, gravitational, magnetic, electrical and electromagnetic)

11

Geophysical Institute. Biennial report, 1993-1994  

SciTech Connect

The 1993-1994 Geophysical Institute Biennial Report was published in November 1995 by the Geophysical Institute of the University of Alaska Fairbanks. It contains an overview of the Geophysical Institute, the Director`s Note, and research presentations concerning the following subjects: Scientific Predictions, Space Physics, Atmospheric Sciences, Snow, Ice and Permafrost, Tectonics and Sedimentation, Seismology, Volcanology, Remote Sensing, and other projects.

NONE

1996-01-01T23:59:59.000Z

12

Environmental and Engineering Geophysical University at SAGEEP 2008: Geophysical Instruction for Non-Geophysicists  

SciTech Connect

The Environmental and Engineering Geophysical Society (EEGS), a nonprofit professional organization, conducted an educational series of seminars at the Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP) in Philadelphia in April 2008. The purpose of these seminars, conducted under the name Environmental and Engineering Geophysical University (EEGU) over three days in parallel with the regular SAGEEP technical sessions, was to introduce nontraditional geophysical conference attendees to the appropriate use of geophysics in environmental and engineering projects. Five half-day, classroom-style sessions were led by recognized experts in the application of seismic, electrical, gravity, magnetics, and ground-penetrating radar methods. Classroom sessions were intended to educate regulators, environmental program managers, consultants, and students who are new to near-surface geophysics or are interested in learning how to incorporate appropriate geophysical approaches into characterization or remediation programs or evaluate the suitability of geophysical methods for general classes of environmental or engineering problems.

Jeffrey G. Paine

2009-03-13T23:59:59.000Z

13

Borehole Geophysical Methods | Open Energy Information  

Open Energy Info (EERE)

Not Provided DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Borehole Geophysical Methods Citation Carole D. Johnson. Borehole...

14

Borehole Geophysical Logging | Open Energy Information  

Open Energy Info (EERE)

2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Borehole Geophysical Logging Citation Hager-Richter Geoscience, Inc.....

15

IGPP: Institute for Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

IGPP Home IGPP Astrophysics IGPP Planetary Sciences IGPP Mini Grant Seminars Phone Book LLNL Home FY09 IGPP Mini Grant The Institute of Geophysics and Planetary Physics (IGPP)...

16

Geophysical Exploration (Montana) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geophysical Exploration (Montana) Geophysical Exploration (Montana) Geophysical Exploration (Montana) < Back Eligibility Utility Fed. Government Commercial Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Installer/Contractor Rural Electric Cooperative Tribal Government Retail Supplier Institutional Fuel Distributor Savings Category Buying & Making Electricity Program Info State Montana Program Type Siting and Permitting Provider Montana Department of Natural Resources and Conservation An exploration permit is required for any entity conducting geophysical exploration within the state of Montana. Such entities are also required to follow rules adopted by the Board of Oil and Gas Conservation, including those pertaining to: (a) Adequate identification of seismic exploration crews operating in this

17

High Precision Geophysics & Detailed Structural Exploration ...  

Open Energy Info (EERE)

icon High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011....

18

A coupled THC model of the FEBEX in situ test with bentonite swelling and chemical and thermal osmosis  

SciTech Connect

The performance assessment of a geological repository for radioactive waste requires quantifying the geochemical evolution of the bentonite engineered barrier. This barrier will be exposed to coupled thermal (T), hydrodynamic (H), mechanical (M) and chemical (C) processes. This paper presents a coupled THC model of the FEBEX (Full-scale Engineered Barrier EXperiment) in situ test which accounts for bentonite swelling and chemical and thermal osmosis. Model results attest the relevance of thermal osmosis and bentonite swelling for the geochemical evolution of the bentonite barrier while chemical osmosis is found to be almost irrelevant. The model has been tested with data collected after the dismantling of heater 1 of the in situ test. The model reproduces reasonably well the measured temperature, relative humidity, water content and inferred geochemical data. However, it fails to mimic the solute concentrations at the heater-bentonite and bentonite-granite interfaces because the model does not account for the volume change of bentonite, the CO{sub 2}(g) degassing and the transport of vapor from the bentonite into the granite. The inferred HCO{sub 3}{sup -} and pH data cannot be explained solely by solute transport, calcite dissolution and protonation/deprotonation by surface complexation, suggesting that such data may be affected also by other reactions.

Zheng, L.; Samper, J.; Montenegro, L.

2011-04-01T23:59:59.000Z

19

SURFACE GEOPHYSICAL EXPLORATION - COMPENDIUM DOCUMENT  

SciTech Connect

This report documents the evolution of the surface geophysical exploration (SGE) program and highlights some of the most recent successes in imaging conductive targets related to past leaks within and around Hanford's tank farms. While it is noted that the SGE program consists of multiple geophysical techniques designed to (1) locate near surface infrastructure that may interfere with (2) subsurface plume mapping, the report will focus primarily on electrical resistivity acquisition and processing for plume mapping. Due to the interferences from the near surface piping network, tanks, fences, wells, etc., the results of the three-dimensional (3D) reconstruction of electrical resistivity was more representative of metal than the high ionic strength plumes. Since the first deployment, the focus of the SGE program has been to acquire and model the best electrical resistivity data that minimizes the influence of buried metal objects. Toward that goal, two significant advances have occurred: (1) using the infrastructure directly in the acquisition campaign and (2) placement of electrodes beneath the infrastructure. The direct use of infrastructure was successfully demonstrated at T farm by using wells as long electrodes (Rucker et al., 2010, 'Electrical-Resistivity Characterization of an Industrial Site Using Long Electrodes'). While the method was capable of finding targets related to past releases, a loss of vertical resolution was the trade-off. The burying of electrodes below the infrastructure helped to increase the vertical resolution, as long as a sufficient number of electrodes are available for the acquisition campaign.

RUCKER DF; MYERS DA

2011-10-04T23:59:59.000Z

20

Geophysical characterization of subsurface barriers  

SciTech Connect

An option for controlling contaminant migration from plumes and buried waste sites is to construct a subsurface barrier of a low-permeability material. The successful application of subsurface barriers requires processes to verify the emplacement and effectiveness of barrier and to monitor the performance of a barrier after emplacement. Non destructive and remote sensing techniques, such as geophysical methods, are possible technologies to address these needs. The changes in mechanical, hydrologic and chemical properties associated with the emplacement of an engineered barrier will affect geophysical properties such a seismic velocity, electrical conductivity, and dielectric constant. Also, the barrier, once emplaced and interacting with the in situ geologic system, may affect the paths along which electrical current flows in the subsurface. These changes in properties and processes facilitate the detection and monitoring of the barrier. The approaches to characterizing and monitoring engineered barriers can be divided between (1) methods that directly image the barrier using the contrasts in physical properties between the barrier and the host soil or rock and (2) methods that reflect flow processes around or through the barrier. For example, seismic methods that delineate the changes in density and stiffness associated with the barrier represents a direct imaging method. Electrical self potential methods and flow probes based on heat flow methods represent techniques that can delineate the flow path or flow processes around and through a barrier.

Borns, D.J.

1995-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Category:Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geophysical Techniques page? For detailed information on Geophysical Techniques as exploration techniques, click here. Category:Geophysical Techniques Add.png Add a new Geophysical Techniques Technique Subcategories This category has the following 4 subcategories, out of 4 total. E [+] Electrical Techniques‎ (2 categories) 5 pages G [×] Gravity Techniques‎ 3 pages M [×] Magnetic Techniques‎ 3 pages S [+] Seismic Techniques‎ (2 categories) 2 pages Pages in category "Geophysical Techniques" The following 5 pages are in this category, out of 5 total. D DC Resistivity Survey (Mise-Á-La-Masse) E Electrical Techniques G Gravity Techniques M Magnetic Techniques

22

Crustal Geophysics and Geochemistry Science Center | Open Energy...  

Open Energy Info (EERE)

Crustal Geophysics and Geochemistry Science Center Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Crustal Geophysics and Geochemistry Science Center...

23

Geophysics II. Tools for seismic interpretation  

SciTech Connect

During the past two decades, the technology of geophysics has exploded. At the same time, the petroleum industry has been forced to look for more and more subtle traps in more and more difficult terrain. The choice of papers in this geophysics reprint volume reflects this evolution. The papers were chosen to help geologists, not geophysicists, enhance their knowledge of geophysics. Math-intensive papers were excluded because those papers are relatively esoteric and have limited applicability for most geologists. This volume concentrates on tools for seismic data interpretation. Each of the 25 papers were abstracted and indexed for the U.S. Department of Energy's Energy Data Base.

Beaumont, E.A.; Foster, N.H. (comps.)

1989-01-01T23:59:59.000Z

24

Geophysics IV. Gravity, Magnetic, and Magnetotelluric Methods  

SciTech Connect

During the past two decades, the technology of geophysics has exploded. At the same time, the petroleum industry has been forced to look for more and more subtle traps in more and more difficult terrain. The choice of papers in this geophysics reprint volume reflects this evolution. The papers were chosen to help geologists, not geophysicists, enhance their knowledge of geophysics. Math-intensive papers were excluded because those papers are relatively esoteric and have limited applicability for most geologists. This volume concentrates on gravity, magnetic, and magnetotelluric methods. Each of the 10 papers were abstracted and indexed for the U.S. Department of Energy's Energy Data Base.

Beaumont, E.A.; Foster, N.H. (comps.)

1989-01-01T23:59:59.000Z

25

Geophysics III. Geologic interpretation of seismic data  

SciTech Connect

During the past two decades, the technology of geophysics has exploded. At the same time, the petroleum industry has been forced to look for more and more subtle traps in more and more difficult terrain. The choice of papers in this geophysics reprint volume reflects this evolution. The papers were chosen to help geologists, not geophysicists, enhance their knowledge of geophysics. Math-intensive papers were excluded because those papers are relatively esoteric and have limited applicability for most geologists. This volume concentrates on geologic interpretation of seismic data interpretation. Each of the 21 papers were abstracted and indexed for the U.S. Department of Energy's Energy Data Base.

Beaumont, E.A.; Foster, N.H. (comps.)

1989-01-01T23:59:59.000Z

26

Institute of Geophysics, Planetary Physics, and Signatures  

NLE Websites -- All DOE Office Websites (Extended Search)

Opportunities » Opportunities » Institute of Geophysics, Planetary Physics, and Signatures Institute of Geophysics, Planetary Physics, and Signatures Promoting and supporting high-quality, cutting-edge science in the areas of astrophysics, space physics, solid planetary geoscience, and climate science. Contact Director Harald Dogliani (505) 663-5309 Email Deputy and Signatures Jon Schoonover (505) 665-0772 Email Professional Staff Assistant Georgia Sanchez (505) 663-5291 Email Astophysics and Cosmology Ed Fenimore (505) 667-7371 Email Climate Manvendra K. Dubey (505) 665-3128 Email Geophysics Scott Baldridge (505) 667-4338 Email Space Physics Josef Koller (505) 665-7395 Email Expanding the frontiers of astrophysical, space, earth, and climate sciences and their signatures The Institute of Geophysics, Planetary Physics, and Signatures at Los

27

Mercury Geochemical, Groundwater Geochemical, And Radiometric Geophysical  

Open Energy Info (EERE)

Geochemical, Groundwater Geochemical, And Radiometric Geophysical Geochemical, Groundwater Geochemical, And Radiometric Geophysical Signatures At Three Geothermal Prospects In Northern Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Mercury Geochemical, Groundwater Geochemical, And Radiometric Geophysical Signatures At Three Geothermal Prospects In Northern Nevada Details Activities (14) Areas (3) Regions (0) Abstract: Ground water sampling, desorbed mercury soil geochemical surveys and a radiometric geophysical survey was conducted in conjunction with geological mapping at three geothermal prospects in northern Nevada. Orientation sample lines from 610 m (2000 ft.) to 4575 m (15,000 ft.) in length were surveyed at right angles to known and suspected faults. Scintillometer readings (gamma radiation - total counts / second) were also

28

LANL | Solid Earth Geophysics | EES-17  

NLE Websites -- All DOE Office Websites (Extended Search)

LANL : Earth & Environmental Sciences : Solid Earth Geophysics (EES-17) LANL : Earth & Environmental Sciences : Solid Earth Geophysics (EES-17) Home Publications Collaboration & Links Staff Research Highlights Ground-Based Nuclear Explosion Monitoring Geodynamics & National Security Nonlinear Elasticity Time Reversal Los Alamos Seismic Network Stimulated Porous Fluid Flow Resource Recovery Seismic & Acoustic Imaging Exploration Geophysics Induced Seismicity Volcanoes & Earthquakes Other Research CONTACTS Group Leader Ken Rehfeldt Administrative Contacts Jody Benson Cecilia Gonzales Geophysics (EES-17) The Geophysics Group supports the national security mission of Los Alamos National Laboratory by providing technical expertise to monitor movement of Earth's crust while predicting the effects of these events on the environment. Though our focus is on seismic monitoring, we also apply electric, magnetic, radionuclide, and acoustic technologies to monitor underground explosions, maintain our ability to conduct tests, and develop the Yucca Mountain Project. In addition, we study the nonlinear properties of earth materials, imaging with seismic waves, how seismic waves affect the interaction of porous rocks and fluids, use of seismic waves to characterize underground oil reservoirs, volcanology and volcanic seismicity, advanced computational physics of earth materials, and using drilling technology to study the crust of the earth. These tasks are complemented by our extensive background in both conventional and hot dry rock geothermal energy development and geophysical support of the Nevada Test Site.

29

Geophysical LaboratoryGeophysical Laboratory Carnegie Institution of WashingtonCarnegie Institution of Washington  

E-Print Network (OSTI)

of Washington Washington, DCWashington, DC Russell J. HemleyRussell J. Hemley Percy W. BridgmanPercy W. BridgmanGeophysical LaboratoryGeophysical Laboratory Carnegie Institution of WashingtonCarnegie Institution STATE VIBRATIONAL STATE ELECTRONIC STATE (K-edge, Band Gap) OPTICAL X-RAY · Diamond window opaque above

Hemley, Russell J.

30

Borehole Logging Methods for Exploration and Evaluation of Uranium Deposits (1967)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Borehole logging methods for exploration Borehole logging methods for exploration and evaluation o f uranium deposits . Philip H. O d d , Robert F. Bmullad and Carl P. Lathan rej~rinkttl fnlm Mining and Groundwater Geophysiall967 Borehole logging methods for exploration and evaluation of uranium deposits Philip H. Dodd, Robert F. Droullard and Carl P. Lathan US. Atomic Energy Commhwn GmrPd Jtinct&n, Colorado Abstract, M o l e 1 - i s thc geophysical methad mast exten&@ w r t i n the Udtrrd States for exploratio~ md edwtim of wanhi &pod&. dammow lop, C o r n r n d j suppkrnentd with a singbz-pobt msfstailee log, m t l y supply about 80 percent of the bask data for om regerve c W t i o R a d mu& of the w ~ k r 6 . p ~ &ngk inf~nnatio~ Tmck-mounted 'rotmy eqnipmcnt i s EMhmody emphy&& holes usually hwre a nominai b

31

Gamma-Ray Logging Workshop (February 1981)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Borehole logging methods for exploration Borehole logging methods for exploration and evaluation o f uranium deposits . Philip H. O d d , Robert F. Bmullad and Carl P. Lathan rej~rinkttl fnlm Mining and Groundwater Geophysiall967 Borehole logging methods for exploration and evaluation of uranium deposits Philip H. Dodd, Robert F. Droullard and Carl P. Lathan US. Atomic Energy Commhwn GmrPd Jtinct&n, Colorado Abstract, M o l e 1 - i s thc geophysical methad mast exten&@ w r t i n the Udtrrd States for exploratio~ md edwtim of wanhi &pod&. dammow lop, C o r n r n d j suppkrnentd with a singbz-pobt msfstailee log, m t l y supply about 80 percent of the bask data for om regerve c W t i o R a d mu& of the w ~ k r 6 . p ~ &ngk inf~nnatio~ Tmck-mounted 'rotmy eqnipmcnt i s EMhmody emphy&& holes usually hwre a nominai b

32

Geophysical Exploration Technologies | Open Energy Information  

Open Energy Info (EERE)

Geophysical Exploration Technologies Geophysical Exploration Technologies Jump to: navigation, search Geothermal ARRA Funded Projects for Geophysical Exploration Technologies Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":false,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

33

Review of geophysical characterization methods used at the Hanford Site  

SciTech Connect

This paper presents a review of geophysical methods used at Hanford in two parts: (1) shallow surface-based geophysical methods and (2) borehole geophysical methods. This review was not intended to be ``all encompassing'' but should represent the vast majority (>90% complete) of geophysical work conducted onsite and aimed at hazardous waste investigations in the vadose zone and/or uppermost groundwater aquifers. This review did not cover geophysical methods aimed at large-scale geologic structures or seismicity and, in particular, did not include those efforts conducted in support of the Basalt Waste Isolation Program. This review focused primarily on the more recent efforts.

GV Last; DG Horton

2000-03-23T23:59:59.000Z

34

Geophysical Method At Raft River Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Geophysical Method At Raft River Geothermal Area (1977) Geophysical Method At Raft River Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geophysical Method At Raft River Geothermal Area (1977) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Geophysical Techniques Activity Date 1977 Usefulness not indicated DOE-funding Unknown Notes Borehole geophysics were completed at the Raft River valley, Idaho. References Applegate, J.K.; Donaldson, P.R.; Hinkley, D.L.; Wallace, T.L. (1 February 1977) Borehole geophysics evaluation of the Raft River geothermal reservoir, Idaho Retrieved from "http://en.openei.org/w/index.php?title=Geophysical_Method_At_Raft_River_Geothermal_Area_(1977)&oldid=594349" Category: Exploration Activities

35

BSU Geophysics Field Camp Report 2012 | Open Energy Information  

Open Energy Info (EERE)

BSU Geophysics Field Camp Report 2012 BSU Geophysics Field Camp Report 2012 Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: BSU Geophysics Field Camp Report 2012 Abstract Neal Hot Springs (NHS) is an active geothermal site and home to a new binary power plant built by U.S. Geothermal and funded through the Department of Energy. Power production is scheduled to begin in late 2012 and is proposed to generate 25 mega-watts of power to its customer Idaho Power. The project has also served Boise State University as an ideal location for geophysical exploration and research. Research began in spring of 2011 during BSU's annual geophysics field camp. Students and faculty conducted various geophysical surveys to gain insight into the controlling geological structure of the area. Studies of the site continued into 2012

36

Borehole geophysics evaluation of the Raft River geothermal reservoir,  

Open Energy Info (EERE)

reservoir, reservoir, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Borehole geophysics evaluation of the Raft River geothermal reservoir, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; GEOPHYSICAL SURVEYS; RAFT RIVER VALLEY; GEOTHERMAL EXPLORATION; BOREHOLES; EVALUATION; HOT-WATER SYSTEMS; IDAHO; MATHEMATICAL MODELS; WELL LOGGING; CAVITIES; EXPLORATION; GEOTHERMAL SYSTEMS; HYDROTHERMAL SYSTEMS; NORTH AMERICA; PACIFIC NORTHWEST REGION; USA Author(s): Applegate, J.K.; Donaldson, P.R.; Hinkley, D.L.; Wallace, T.L. Published: Geophysics, 2/1/1977 Document Number: Unavailable DOI: Unavailable Source: View Original Journal Article Geophysical Method At Raft River Geothermal Area (1977) Raft River Geothermal Area

37

Recent advances in optimized geophysical survey design Hansruedi Maurer1  

E-Print Network (OSTI)

- time tomography: Geophysics, 74, no.4, Q27­Q40, doi:10.1190/ 1.3141738. Atkinson, A. C., A. N. Donev

38

Geophysical Study of the Salton Trough of Southern California...  

Open Energy Info (EERE)

1964 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Geophysical Study of the Salton Trough of Southern California Citation Shawn...

39

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

NEWS LIBRARY JOBS SITE MAP Emergency Maps Organization Goals Phone Search Science > LANL Institutes > Institute of Geophysics and Planetary Physics National Security Education...

40

An Integrated Geophysical Study Of The Geothermal Field Of Tule...  

Open Energy Info (EERE)

Geothermal Field Of Tule Chek, Bc, Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Geophysical Study Of The Geothermal Field Of...

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Reconnaissance geophysical studies of the geothermal system in...  

Open Energy Info (EERE)

geophysical studies of the geothermal system in southern Raft River Valley, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Reconnaissance...

42

Borehole geophysics evaluation of the Raft River geothermal reservoir...  

Open Energy Info (EERE)

reservoir, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Borehole geophysics evaluation of the Raft River geothermal reservoir, Idaho Details...

43

Field implementation of geophysical diffraction tomography  

SciTech Connect

Geophysical diffraction tomography is a new technique that shows promise as a tool for quantitative subsurface (below-ground) imaging. The approach being used is based upon the filtered backpropagation algorithm, which is a mathematical extension of the reconstruction software used in conventional X-ray CAT scanners. The difference between this method and existing methods is that the new algorithm rigorously accounts for diffraction effects through an exact inversion of the wave equation. This refinement is necessary in that it admits the use of acoustic and long-wavelength electromagnetic waves, allowing tomography to be taken from the laboratory to the field. ORNL's effort in geophysical diffraction tomography involves reducing the filtered backpropagation algorithm to practice. This requires the design and construction of field instrumentation as well as the development of an improved algorithm. The original algorithm requires the imaged region to be illuminated by plane waves. This requirement simplifies the algorithm but complicates its field implementation in that plane waves are difficult to generate. Consequently, ORNL has been working to generalize the filtered backpropagation algorithm to allow a broader range of incoming wave fields which can more easily be realized in the field. The instrumentation aspects involve the selection of appropriate sonic sources and receivers along with the development of a state-of-art, portable, computer-controlled, multichannel data acquisition system. 5 references, 6 figures.

Witten, A.J.; Stevens, S.S.

1984-01-01T23:59:59.000Z

44

An introduction to electrical resistivity in geophysics | Open Energy  

Open Energy Info (EERE)

An introduction to electrical resistivity in geophysics An introduction to electrical resistivity in geophysics Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: An introduction to electrical resistivity in geophysics Abstract Physicists are finding that the skills they have learned in their training may be applied to areas beyond traditional physics topics. One such field is that of geophysics. This paper presents the electrical resistivity component of an undergraduate geophysics course at Radford University. It is taught from a physics perspective, yet the application of the theory to the real world is the overriding goal. The concepts involved in electrical resistivity studies are first discussed in a general sense, and then they are studied through the application of the relevant electromagnetic theory.

45

Geophysical Method At Raft River Geothermal Area (1975) | Open Energy  

Open Energy Info (EERE)

Method At Raft River Geothermal Area (1975) Method At Raft River Geothermal Area (1975) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geophysical Method At Raft River Geothermal Area (1975) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Geophysical Techniques Activity Date 1975 Usefulness not indicated DOE-funding Unknown Notes Geologic and geophysics studies were completed at the Raft River valley. References Williams, P.L.; Mabey, D.R.; Pierce, K.L.; Zohdy, A.A.R.; Ackermann, H.; Hoover, D.B. (1 May 1975) Geological and geophysical studies of a geothermal area in the southern Raft river valley, Idaho Retrieved from "http://en.openei.org/w/index.php?title=Geophysical_Method_At_Raft_River_Geothermal_Area_(1975)&oldid=59434

46

Integrated Surface Geophysical Methods for Characterization of the Naval  

Open Energy Info (EERE)

Integrated Surface Geophysical Methods for Characterization of the Naval Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Author USGS Published Publisher Not Provided, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Citation USGS. Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey [Internet]. 2013. [updated 2013/01/03;cited 2013/11/22]. Available from: http://water.usgs.gov/ogw/bgas/toxics/NAWC-surface.html

47

Integrated Geophysical Exploration of a Known Geothermal Resource: Neal Hot  

Open Energy Info (EERE)

Geophysical Exploration of a Known Geothermal Resource: Neal Hot Geophysical Exploration of a Known Geothermal Resource: Neal Hot Springs Jump to: navigation, search OpenEI Reference LibraryAdd to library Book Section: Integrated Geophysical Exploration of a Known Geothermal Resource: Neal Hot Springs Abstract We present integrated geophysical data to characterize a geothermal system at Neal Hot Springs in eastern Oregon. This system is currently being developed for geothermal energy production. The hot springs are in a region of complex and intersecting fault trends associated with two major extensional events, the Oregon-Idaho Graben and the Western Snake River Plain. The intersection of these two fault systems, coupled with high geothermal gradients from thin continental crust produces pathways for surface water and deep geothermal water interactions at Neal Hot Springs.

48

Rules and Regulations Governing Geophysical, Seismic or Other Type  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Rules and Regulations Governing Geophysical, Seismic or Other Type Rules and Regulations Governing Geophysical, Seismic or Other Type Exploration on State-Owned Lands Other Than State-Owned Marine Waters (Mississippi) Rules and Regulations Governing Geophysical, Seismic or Other Type Exploration on State-Owned Lands Other Than State-Owned Marine Waters (Mississippi) < Back Eligibility Commercial Developer Fuel Distributor General Public/Consumer Industrial Investor-Owned Utility Municipal/Public Utility Utility Program Info State Mississippi Program Type Environmental Regulations Siting and Permitting Provider Mississippi Development Authority The Rules and Regulations Governing Geophysical, seismic or Other Type Exploration on State-Owned Lands Other than State-Owned Marine Waters is applicable to the Natural Gas Sector and the Coal with CCS Sector. This law

49

Geological and geophysical analysis of Coso Geothermal Exploration Hole No.  

Open Energy Info (EERE)

and geophysical analysis of Coso Geothermal Exploration Hole No. and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Details Activities (5) Areas (1) Regions (0) Abstract: The Coso Geothermal Exploration Hole number one (CGEH-1) was drilled in the Coso Hot Springs KGRA, California, from September 2 to December 2, 1977. Chip samples were collected at ten foot intervals and extensive geophysical logging surveys were conducted to document the geologic character of the geothermal system as penetrated by CGEH-1. The major rock units encountered include a mafic metamorphic sequence and a

50

Beyond Gaussian Statistical Modeling in Geophysical Data Assimilation  

Science Conference Proceedings (OSTI)

This review discusses recent advances in geophysical data assimilation beyond Gaussian statistical modeling, in the fields of meteorology, oceanography, as well as atmospheric chemistry. The non-Gaussian features are stressed rather than the ...

Marc Bocquet; Carlos A. Pires; Lin Wu

2010-08-01T23:59:59.000Z

51

Geophysical Applications of Partial Wavelet Coherence and Multiple Wavelet Coherence  

Science Conference Proceedings (OSTI)

In this paper, the application of partial wavelet coherence (PWC) and multiple wavelet coherence (MWC) to geophysics is demonstrated. PWC is a technique similar to partial correlation that helps identify the resulting wavelet coherence (WTC) ...

Eric K. W. Ng; Johnny C. L. Chan

2012-12-01T23:59:59.000Z

52

Contour Analysis: A New Approach for Melding Geophysical Fields  

Science Conference Proceedings (OSTI)

This paper introduces a new approach, contour analysis, for combining independent estimates of a geophysical field to produce a single realization incorporating data from all sources. Contour analysis divides the field estimates into contours and ...

Arthur J. Mariano

1990-04-01T23:59:59.000Z

53

Near-Inertial Oscillations of Geophysical Surface Frontal Currents  

Science Conference Proceedings (OSTI)

Intrinsic oscillations of stable geophysical surface frontal currents of the unsteady, nonlinear, reduced-gravity shallow-water equations on an f plane are investigated analytically and numerically. For frictional (Rayleigh) currents ...

Angelo Rubino; Sergey Dotsenko; Peter Brandt

2003-09-01T23:59:59.000Z

54

AGU: Journal of Geophysical Research geomagnetic ionosphere currents  

E-Print Network (OSTI)

AGU: Journal of Geophysical Research Keywords geomagnetic ionosphere currents Index Terms Ionosphere: Polar cap ionosphere Ionosphere: Current systems Geomagnetism and Paleomagnetism: Rapid time variations Space Weather: Impacts on technological systems Space Weather: Geomagnetically induced currents

Michigan, University of

55

Understanding biogeobatteries: Where geophysics meets microbiology  

SciTech Connect

Although recent research suggests that contaminant plumes behave as geobatteries that produce an electrical current in the ground, no associated model exists that honors both geophysical and biogeochemical constraints. Here, we develop such a model to explain the two main electrochemical contributions to self-potential signals in contaminated areas. Both contributions are associated with the gradient of the activity of two types of charge carriers, ions and electrons. In the case of electrons, bacteria act as catalysts for reducing the activation energy needed to exchange the electrons between electron donor and electron acceptor. Possible mechanisms that facilitate electron migration include iron oxides, clays, and conductive biological materials, such as bacterial conductive pili or other conductive extracellular polymeric substances. Because we explicitly consider the role of biotic processes in the geobattery model, we coined the term 'biogeobattery'. After theoretical development of the biogeobattery model, we compare model predictions with self-potential responses associated with laboratory and field-scale conducted in contaminated environments. We demonstrate that the amplitude and polarity of large (>100 mV) self-potential signatures requires the presence of an electronic conductor to serve as a bridge between electron donors and acceptors. Small self-potential anomalies imply that electron donors and electron acceptors are not directly interconnected, but instead result simply from the gradient of the activity of the ionic species that are present in the system.

Revil, A.; Mendonca, C.A.; Atekwana, E.A.; Kulessa, B.; Hubbard, S.S.; Bohlen, K.

2009-08-15T23:59:59.000Z

56

Geophysical background and as-built target characteristics  

Science Conference Proceedings (OSTI)

The US Department of Energy (DOE) Grand Junction Projects Office (GJPO) has provided a facility for DOE, other Government agencies, and the private sector to evaluate and document the utility of specific geophysical measurement techniques for detecting and defining cultural and environmental targets. This facility is the Rabbit Valley Geophysics Performance Evaluation Range (GPER). Geophysical surveys prior to the fiscal year (FY) 1994 construction of new test cells showed the primary test area to be relatively homogeneous and free from natural or man-made artifacts, which would generate spurious responses in performance evaluation data. Construction of nine new cell areas in Rabbit Valley was completed in June 1994 and resulted in the emplacement of approximately 150 discrete targets selected for their physical and electrical properties. These targets and their geophysical environment provide a broad range of performance evaluation parameters from ``very easy to detect`` to ``challenging to the most advanced systems.`` Use of nonintrusive investigative techniques represents a significant improvement over intrusive characterization methods, such as drilling or excavation, because there is no danger of exposing personnel to possible hazardous materials and no risk of releasing or spreading contamination through the characterization activity. Nonintrusive geophysical techniques provide the ability to infer near-surface structure and waste characteristics from measurements of physical properties associated with those targets.

Allen, J.W.

1994-09-01T23:59:59.000Z

57

Characterization Of Geothermal Resources Using New Geophysical Technology |  

Open Energy Info (EERE)

Using New Geophysical Technology Using New Geophysical Technology Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Characterization Of Geothermal Resources Using New Geophysical Technology Details Activities (2) Areas (2) Regions (0) Abstract: This paper presents a geothermal case history using a relatively new but proven technology that can accurately map groundwater at significant depths (up to 1,000 meters) over large areas (square kilometers) in short periods of time (weeks). Understanding the location and extent of groundwater resources is very important to the geothermal industry for obvious reasons. It is crucial to have a cost-effective method of understanding where concentrations of geothermal water are located as well as the preferential flow paths of the water in the subsurface. Such

58

Well casing-based geophysical sensor apparatus, system and method  

DOE Patents (OSTI)

A geophysical sensor apparatus, system, and method for use in, for example, oil well operations, and in particular using a network of sensors emplaced along and outside oil well casings to monitor critical parameters in an oil reservoir and provide geophysical data remote from the wells. Centralizers are affixed to the well casings and the sensors are located in the protective spheres afforded by the centralizers to keep from being damaged during casing emplacement. In this manner, geophysical data may be detected of a sub-surface volume, e.g. an oil reservoir, and transmitted for analysis. Preferably, data from multiple sensor types, such as ERT and seismic data are combined to provide real time knowledge of the reservoir and processes such as primary and secondary oil recovery.

Daily, William D. (Livermore, CA)

2010-03-09T23:59:59.000Z

59

Geophysical Investigations of Archaeological Resources in Southern Idaho  

SciTech Connect

At the Idaho National Laboratory and other locations across southern Idaho, geophysical tools are being used to discover, map, and evaluate archaeological sites. A variety of settings are being explored to expand the library of geophysical signatures relevant to archaeology in the region. Current targets of interest include: prehistoric archaeological features in open areas as well as lava tube caves, historical structures and activity areas, and emigrant travel paths. We draw from a comprehensive, state of the art geophysical instrumentation pool to support this work. Equipment and facilities include ground penetrating radar, electromagnetic and magnetic sensors, multiple resistivity instruments, advanced positioning instrumentation, state of the art processing and data analysis software, and laboratory facilities for controlled experiments.

Brenda Ringe Pace; Gail Heath; Clark Scott; Carlan McDaniel

2005-10-01T23:59:59.000Z

60

Reconnaissance geophysical studies of the geothermal system in southern  

Open Energy Info (EERE)

geophysical studies of the geothermal system in southern geophysical studies of the geothermal system in southern Raft River Valley, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Reconnaissance geophysical studies of the geothermal system in southern Raft River Valley, Idaho Details Activities (4) Areas (1) Regions (0) Abstract: Gravity, aeromagnetic, and telluric current surveys in the southern Raft River have been used to infer the structure and the general lithology underlying the valley. The gravity data indicate the approximate thickness of the Cenozoic rocks and location of the larger normal faults, and the aeromagnetic data indicate the extent of the major Cenozoic volcanic units. The relative ellipse area contour map compiled from the telluric current survey generally conforms to the gravity map except for

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We encourage you to perform a real-time search of NLEBeta
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61

Merging High Resolution Geophysical and Geochemical Surveys to Reduce  

Open Energy Info (EERE)

Merging High Resolution Geophysical and Geochemical Surveys to Reduce Merging High Resolution Geophysical and Geochemical Surveys to Reduce Exploration Risk at Glass Buttes, Oregon Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Merging High Resolution Geophysical and Geochemical Surveys to Reduce Exploration Risk at Glass Buttes, Oregon Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description This program will combine detailed gravity, high resolution aeromagnetic, and LIDAR data, all of which will be combined for structural modeling, with hyperspectral data, which will identify and map specific minerals and mineral assemblages that may point to upflow zones. The collection of these surveys and analyses of the merged data and model will be used to site deeper slim holes. Slim holes will be flow tested to determine whether or not Ormat can move forward with developing this resource. An innovative combination of geophysical and geochemical tools will significantly reduce risk in exploring this area, and the results will help to evaluate the value of these tools independently and in combination when exploring for blind resources where structure, permeability, and temperature are the most pressing questions. The slim holes will allow testing of models and validation of methods, and the surveys within the wellbores will be used to revise the models and site production wells if their drilling is warranted.

62

High Precision Geophysics & Detailed Structural Exploration & Slim Well  

Open Energy Info (EERE)

Precision Geophysics & Detailed Structural Exploration & Slim Well Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description Existing geologic data show that the basalt has been broken by complex intersecting fault zones at the hot springs. Natural state hot water flow patterns in the fracture network will be interpreted from temperature gradient wells and then tested with moderate depth core holes. Production and injection well tests of the core holes will be monitored with an innovative combination of Flowing Differential Self-Potential (FDSP) and resistivity tomography surveys. The cointerpretation of all these highly detailed geophysical methods sensitive to fracture permeability patterns and water flow during the well tests will provide unprecedented details on the structures and flow in a shallow geothermal aquifer and support effective development of the low temperature reservoir and identification of deep up flow targets.

63

Wavelet denoising techniques with applications to experimental geophysical data  

Science Conference Proceedings (OSTI)

In this paper, we compare Fourier-based and wavelet-based denoising techniques applied to both synthetic and real experimental geophysical data. The Fourier-based technique used for comparison is the classical Wiener estimator, and the wavelet-based ... Keywords: Denoising, Empirical Bayes, Wavelet, Wavelet thresholding, Wiener filter

Albert C. To; Jeffrey R. Moore; Steven D. Glaser

2009-02-01T23:59:59.000Z

64

Geological and geophysical studies of a geothermal area in the southern  

Open Energy Info (EERE)

Geological and geophysical studies of a geothermal area in the southern Geological and geophysical studies of a geothermal area in the southern Raft river valley, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Geological and geophysical studies of a geothermal area in the southern Raft river valley, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: areal geology; Cassia County Idaho; Cenozoic; clastic rocks; clasts; composition; conglomerate; economic geology; electrical methods; evolution; exploration; faults; folds; geophysical methods; geophysical surveys; geothermal energy; gravity methods; Idaho; igneous rocks; lithostratigraphy; magnetic methods; pyroclastics; Raft River Valley; resources; sedimentary rocks; seismic methods; stratigraphy; structural geology; structure; surveys; tectonics; United States; volcanic rocks

65

Geophysical Characterization of a Geothermal System Neal Hot Springs,  

Open Energy Info (EERE)

Characterization of a Geothermal System Neal Hot Springs, Characterization of a Geothermal System Neal Hot Springs, Oregon, USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geophysical Characterization of a Geothermal System Neal Hot Springs, Oregon, USA Abstract Neal Hot Springs is an active geothermal area that is also the proposed location of a binary power plant, which is being developed by US Geothermal Inc. To date, two production wells have been drilled and an injection well is in the process of being completed. The primary goal of this field camp was to provide a learning experience for students studying geophysics, but a secondary goal was to characterize the Neal Hot Springs area to provide valuable information on the flow of geothermal fluids through the subsurface. This characterization was completed using a variety of

66

Borehole geophysics evaluation of the Raft River geothermal reservoir |  

Open Energy Info (EERE)

reservoir reservoir Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Book: Borehole geophysics evaluation of the Raft River geothermal reservoir Details Activities (1) Areas (1) Regions (0) Abstract: Borehole geophysics techniques were used in evaluating the Raft River geothermal reservoir to establish a viable model for the system. The assumed model for the hot water (145/sup 0/C) reservoir was a zone of higher conductivity, increased porosity, decreased density, and lower sonic velocity. It was believed that the long term contact with the hot water would cause alteration producing these effects. With this model in mind, cross-plots of the above parameters were made to attempt to delineate the reservoir. It appears that the most meaningful data include smoothed and

67

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Summer of Applied Geophysical Experience (SAGE) Summer of Applied Geophysical Experience (SAGE) Application Form A complete application includes: An on-line application Letter of Interest two (2) references (download reference form in PDF or Word format). Referee must submit by email to georgia@lanl.gov or fax to: 505-663-5225 proof of health insurance complete transcripts (unofficial is acceptable) Foreign students, please contact Georgia Sanchez at georgia@lanl.gov regarding your application. Cost is $500, $100.00 is due with the application. Please mail deposit with a copy of your application to: SAGE IGPPS, MS-T001 Los Alamos National Laboratory Los Alamos, NM 87545 USA Email: georgia@lanl.gov Voice: 505-663-5291 Note: Course credit may be possible by prior arrangement with your university (please check with your advisor) but cannot be awarded directly

68

Geophysical data fusion for subsurface imaging. Final report  

SciTech Connect

This report contains the results of a three year, three-phase project whose long-range goal has been to create a means for the more detailed and accurate definition of the near-surface (0--300 ft) geology beneath a site that had been subjected to environmental pollution. The two major areas of research and development have been: improved geophysical field data acquisition techniques; and analytical tools for providing the total integration (fusion) of all site data. The long-range goal of this project has been to mathematically, integrate the geophysical data that could be derived from multiple sensors with site geologic information and any other type of available site data, to provide a detailed characterization of thin clay layers and geological discontinuities at hazardous waste sites.

NONE

1995-10-01T23:59:59.000Z

69

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Geophysics Geophysics Focus Leader: Scott Baldridge sbaldridge@lanl.gov This focus supports a breadth of basic research concerning planetary surfaces and interiors, including numerical, experimental, and field studies of the structure, properties, processes, and dynamics of terrestrial and giant planets. It is strongly recommended that proposals exploit unique LANL resources (e.g., LANL high-performance computing resources; the Los Alamos Neutron Science Center (LANSCE); geochemical analyses facilities resident in EES and C divisions; and/or sensor technology capabilities resident in C, EES, ISR, and N divisions). We are particularly interested in innovative research projects in areas of current, strong international scientific interest such as the following: New techniques in passive (imaging) or active (e.g., lidar, radar)

70

Regional geology and geophysics of the Jemez Mountains  

DOE Green Energy (OSTI)

The western margin of the Rocky Mountain tectonic belt is the initial site for the Los Alamos Geothermal Project. lgneous activity in the area culminated with the formation of a collapsed volcanic caldera and the deposition of thick beds of tuff. Geophysical studies indicate that the region is one of relatively highterrestrial heat flow, low-crustal density, low-crustal seismic velocities, low-crustal magnetoelectric impedance, and thin crust. 34 references. (auth)

West, F.G.

1973-08-01T23:59:59.000Z

71

Geophysics-based method of locating a stationary earth object  

DOE Patents (OSTI)

A geophysics-based method for determining the position of a stationary earth object uses the periodic changes in the gravity vector of the earth caused by the sun- and moon-orbits. Because the local gravity field is highly irregular over a global scale, a model of local tidal accelerations can be compared to actual accelerometer measurements to determine the latitude and longitude of the stationary object.

Daily, Michael R. (Albuquerque, NM); Rohde, Steven B. (Corrales, NM); Novak, James L. (Albuquerque, NM)

2008-05-20T23:59:59.000Z

72

Geophysical Fluid Dynamics Laboratory Portal | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Geophysical Fluid Dynamics Laboratory Portal Geophysical Fluid Dynamics Laboratory Portal Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Geophysical Fluid Dynamics Laboratory Portal Dataset Summary Description Output and documentation from a set of multi-century experiments performed using NOAA/GFDL's climate models. Users can download files, display data file attributes, and graphically display the data. Data sets include those from CM2.X experiments associated with the Intergovernmental Panel on Climate Change Assessment Report (IPCC) and the US Climate Change Science Program (US CCSP). Tags {climate,IPCC,CCSP,pressure,SLP," sea ice","upper-level winds",ozone,"meridional winds","zonal winds",u-wind,v-wind," carbon dioxide"," volcanic",aerosol,grids,"soil moisture"," IPCC",flux,"radiation flux",thickness,radiation,emissivity,longwave,sensible,"latent heat",downwelling,upwelling,temperature,convective,runoff,"water vapor",humidity,cloudiness,transport,"geopotential height",assimilation,salinity,evaporation,freshwater}

73

DECOVALEX-THMC Task D: Long-Term Permeability/Porosity Changes inthe EDZ and Near Field due to THM and THC Processes in Volcanic andCrystaline-Bentonite Systems, Status Report October 2005  

Science Conference Proceedings (OSTI)

The DECOVALEX project is an international cooperativeproject initiated by SKI, the Swedish Nuclear Power Inspectorate, withparticipation of about 10 international organizations. The name DECOVALEXstands for DEvelopment of COupled models and their VALidation againstExperiments. The general goal of this project is to encouragemultidisciplinary interactive and cooperative research on modelingcoupled processes in geologic formations in support of the performanceassessment for underground storage of radioactive waste. Three multi-yearproject stages of DECOVALEX have been completed in the past decade,mainly focusing on coupled thermal-hydrological-mechanicalprocesses.Currently, a fourth three-year project stage of DECOVALEX isunder way, referred to as DECOVALEX-THMC. THMC stands for Thermal,Hydrological, Mechanical, and Chemical processes. The new project stageaims at expanding the traditional geomechanical scope of the previousDECOVALEX project stages by incorporating geochemical processes importantfor repository performance. The U.S. Department of Energy (DOE) leadsTask D of the new DECOVALEX phase, entitled "Long-termPermeability/Porosity Changes in the EDZ and Near Field due to THC andTHM Processes for Volcanic and Crystalline-Bentonite Systems." In itsleadership role for Task D, DOE coordinates and sets the direction forthe cooperative research activities of the international research teamsengaged in Task D.

Birkholzer, J.; Rutqvist, J.; Sonnenthal, E.; Barr, D.

2005-11-01T23:59:59.000Z

74

An Integrated Model For The Geothermal Field Of Milos From Geophysical  

Open Energy Info (EERE)

Milos From Geophysical Milos From Geophysical Experiments Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Model For The Geothermal Field Of Milos From Geophysical Experiments Details Activities (0) Areas (0) Regions (0) Abstract: The results of geophysical experiments carried out by eight teams on the island of Milos as part of an integrated project under the European Commission's geothermal R & D programme are considered. The combination of these data with earlier studies on the geology and geophysics of Milos allow the compilation of a possible model of the geothermal reservoir and its surroundings in the central eastern part of the island. The reservoir is fed by convection of hot fluids from a depth of several kilometres, but the geophysical data provide no strong support for the earlier hypothesis

75

Institute of Geophysics and Planetary Physics 1993 annual report, October 1, 1992--September 30, 1993  

Science Conference Proceedings (OSTI)

This report contains brief papers on the research being conducted at the Institute of Geophysics and Planetary Physics in 1993 in Geosciences, High-Pressure sciences, and Astrophysics.

Ryerson, F.J.; Budwine, C.M. [eds.

1994-06-15T23:59:59.000Z

76

An Integrated Model For The Geothermal Field Of Milos From Geophysical...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon An Integrated Model For The Geothermal Field Of Milos From Geophysical Experiments Jump to:...

77

At quadrennial geophysics fest, earth scientists think globally  

Science Conference Proceedings (OSTI)

This article focuses on two areas of current research interest from the International Union of Geodesy and Geophysics meeting in July 1995. The first is the possible long and unlikely seeming change of connections. Linked are the warm surface of the tropical Pacific Ocean, the atmosphere at the midlatitudes in the Southern Hemisphere and the icy stratosphere over Antarctica where the warming of the sea surface 15 years ago may have set the stage for the Antarctic ozone hole. The second major research research reviewed concerned increases in ultraviolet light. Surface radiation in the DNA-damaging region of the spectrum is increasing by as much as 12% per decade at high latitudes.

Kerr, R.A.

1995-07-28T23:59:59.000Z

78

Computerized coal-quality prediction from digital geophysical logs  

SciTech Connect

A digital suite of geophysical logs, including gamma-ray, resistivity and gamma-gamma density, were used to develop and test a method for predicting coal quality parameters for the Wyodak coal in the Powder River basin of Wyoming. The method was developed by plotting the average of various log response increments (obtained from the contractor's 9-track digital tapes) versus the analytically determined ash, moisture, and Btu/lb for the same intervals of the coal seam. Standard curve-fitting techniques were then employed to determine which log response parameter most accurately predicted the various quality parameters. A computer program was written that reads 9-track, digital, log tapes and determines the coal quality parameters based on the relationships between log response and analytical values. The computer program was written in Fortran 77 for a VAX 11/780 minicomputer. The program was designed to run interactively with user-determined options depending on which geophysical logs were available. Preliminary results have been very encouraging to date with predicted versus analytically determined parameters being estimated to an accuracy of +/-300 Btu/lb (with the average being +/-150 Btu/lb), +/-2% ash and +/-3% moisture. This compares to ASTM lab-to-lab analytical standards of +/-100 Btu/lb, +/-0.7% ash, and +/-0.5% moisture. This prediction methods is applicable to coals from other basins and offers promise as a cost saving tool for exploration and production uses.

Nations, D.L.; Tabet, D.E.; Gerould, C.R.

1984-07-01T23:59:59.000Z

79

A heuristic algorithm for pattern identification in large multivariate analysis of geophysical data sets  

Science Conference Proceedings (OSTI)

This paper aims to present a heuristic algorithm with factor analysis and a local search optimization system for pattern identification problems as applied to large and multivariate aero-geophysical data. The algorithm was developed in MATLAB code using ... Keywords: Aero-geophysical data, Factor analysis, Local search system, MATLAB program, Patterns identification

Joo Eduardo da Silva Pereira; Adelir Jos Strieder; Janete Pereira Amador; Jos Luiz Silvrio da Silva; Lenidas Luiz Volcato Descovi Filho

2010-01-01T23:59:59.000Z

80

CV-Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana  

E-Print Network (OSTI)

chemistry & Stable isotopes Postdoc 1998-2001 APPOINTMENTS 2012- Professor in Geology and Geophysics Geology and Earth System History for undergraduate students; Stable Isotope Geochemistry and Carbonate1 CV- Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex

Bao, Huiming

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

CV-Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana  

E-Print Network (OSTI)

isotopes Postdoc 1998-2001 APPOINTMENTS 2007- Associate professor in Geology and Geophysics, Louisiana Physical Geology and Earth System History for undergraduate students; Stable Isotope Geochemistry1 CV- Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex

Bao, Huiming

82

Laboratory Measurement of Geophysical Properties for Monitoring of CO2 Sequestration  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory Measurement of Geophysical Properties for Monitoring of Laboratory Measurement of Geophysical Properties for Monitoring of CO 2 Sequestration Larry R. Myer (LRMyer@lbl.gov; 510/486-6456) Lawrence Berkeley National Laboratory Earth Science Division One Cyclotron Road, MS 90-1116 Berkeley, CA 94720 Introduction Geophysical techniques will be used in monitoring of geologic sequestration projects. Seismic and electrical geophysical techniques will be used to map the movement of CO 2 in the subsurface and to establish that the storage volume is being efficiently utilized and the CO 2 is being safely contained within a known region. Rock physics measurements are required for interpretation of the geophysical surveys. Seismic surveys map the subsurface velocities and attenuation while electrical surveys map the conductivity. Laboratory measurements are required to convert field

83

Geophysical logging case history of the Raft River geothermal system, Idaho  

Open Energy Info (EERE)

Geophysical logging case history of the Raft River geothermal system, Idaho Geophysical logging case history of the Raft River geothermal system, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geophysical logging case history of the Raft River geothermal system, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Drilling to evaluate the geothermal resource in the Raft River Valley began in 1974 and resulted in the discovery of a geothermal reservoir at a depth of approximately 1523 m (500 ft). Several organizations and companies have been involved in the geophysical logging program. There is no comprehensive report on the geophysical logging, nor has there been a complete interpretation. The objectives of this study are to make an integrated interpretation of the available data and compile a case history. Emphasis has been on developing a simple interpretation

84

A Geothermal Field Model Based On Geophysical And Thermal Prospectings In  

Open Energy Info (EERE)

Model Based On Geophysical And Thermal Prospectings In Model Based On Geophysical And Thermal Prospectings In Nea Kessani (Ne Greece) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Geothermal Field Model Based On Geophysical And Thermal Prospectings In Nea Kessani (Ne Greece) Details Activities (0) Areas (0) Regions (0) Abstract: The present study completes a study by Thanassoulas et al. (1986) Geophys. Prosp.34, 83-97 and deals with geophysical exploration for geothermal resources in Nea Kessani area, NE Greece. The results of some deep electrical soundings (AB = 6000 m) with the interpretation of a gravity profile crossing the investigated area are considered together with thermal investigations. All subsequent information, along with the conclusions of an earlier paper dealing with a reconnaissance geophysical

85

Geophysical Studies in the Vicinity of Blue Mountain and Pumpernickel  

Open Energy Info (EERE)

the Vicinity of Blue Mountain and Pumpernickel the Vicinity of Blue Mountain and Pumpernickel Valley near Winnemucca, North-Central Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geophysical Studies in the Vicinity of Blue Mountain and Pumpernickel Valley near Winnemucca, North-Central Nevada Abstract From May 2008 to September 2009, the U.S. Geological Survey (USGS) collected data from more than 660 gravity stations, 100 line-km of truck-towed magnetometer traverses, and 260 physical-property sites in the vicinity of Blue Mountain and Pumpernickel Valley, northern Nevada (fig. 1). Gravity, magnetic, and physical-property data were collected to study regional crustal structures as an aid to understanding the geologic framework of the Blue Mountain and Pumpernickel Valley areas, which in

86

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Expanding the Frontiers of Astrophysical, Space, Earth, & Climate Sciences & Their Signatures The Institute of Geophysics, Planetary Physics, and Signatures at Los Alamos National Laboratory is committed to promoting and supporting high quality, cutting-edge science in the areas of astrophysics, space physics, solid planetary geoscience, and climate science. These subject areas are selected based on their breadth of scientific challenges facing the international scientific community, as well as relevance to the strategic objective to extend Laboratory scientific excellence. IGPPS/LANL makes a special effort to promote and support new research ideas, which can be further developed through seed funding into major programs supported by federal or other funding sources. IGPPS also supports

87

Geophysical investigation: New Production Reactor Complex, Idaho National Engineering Laboratory  

Science Conference Proceedings (OSTI)

Seismic crosshole and downhole velocity measurements were performed for two borehole arrays approximately 300 feet deep in conjunction with verticality measurements and geophysical logging of borehole WO-2 (to a depth of 4,960 feet) at the NPR site of the INEL. Past studies show that the site area is covered by a thin layer of soil which overlies numerous basalt flows interrupted by sandy and clayey interbeds. Compressional and shear wave velocities computed for these arrays revealed low velocity zones at the following elevation ranges for crosshole array No. 1: 4,893 feet to 4,873 feet (basalt rubble zone) and 4,705 feet to 4,686 feet (sediment interbed). Corresponding elevation ranges for crosshole array No. 2 include: 4,830 feet to 4,815 feet (sediment interbed), 4,785 feet to 4,765 feet (highly vesicular and fractured basalt), 4,715 feet to 4,705 feet (basalt rubble zone), and 4,672 feet to 4,667 feet (sediment interbed). In general, crosshole velocity data correlated between arrays with velocity differences possibly explained by localized lithologic changes. Due to scatter in the downhole velocity data, only velocity averages were computed. However, these downhole velocities correlated to the approximate mean crosshole velocity values and therefore independent confirmed the crosshole data. Geophysical logging of well WO-2 included natural gamma, neutron, and compensated density logs to a depth of 4,960 feet at which a viscous borehole fluid inhibited further investigation. Second runs of small sections of these logs were repeated satisfactorily for confirmation of certain anomalous areas.

Filipkowski, F.; Blackey, M.; Davies, D.; Levine, E.N.; Murphy, V. [Weston Geophysical Corp., Westboro, MA (US)

1991-12-01T23:59:59.000Z

88

Role of borehole geophysics in defining the physical characteristics of the  

Open Energy Info (EERE)

Role of borehole geophysics in defining the physical characteristics of the Role of borehole geophysics in defining the physical characteristics of the Raft River geothermal reservoir, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Role of borehole geophysics in defining the physical characteristics of the Raft River geothermal reservoir, Idaho Details Activities (4) Areas (1) Regions (0) Abstract: Numerous geophysical logs have been made in three deep wells and in several intermediate depth core holes in the Raft River geothermal reservoir, Idaho. Laboratory analyses of cores from the intermediate depth holes were used to provide a qualitative and quantitative basis for a detailed interpretation of logs from the shallow part of the reservoir. A less detailed interpretation of logs from the deeper part of the reservoir

89

Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At  

Open Energy Info (EERE)

Geophysical Evidence For Intra-Basin And Footwall Faulting At Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada Details Activities (1) Areas (1) Regions (0) Abstract: A 'nested graben' structural model, in which multiple faults successively displace rocks downward to the deepest part of the basin, is supported by recent field geologic analysis and correlation of results to geophysical data for Dixie Valley. Aerial photographic analysis and detailed field mapping provide strong evidence for a deep graben separated from the ranges to the east and west by multiple normal faults that affect the Tertiary/Quaternary basin-fill sediments. Correlation with seismic

90

Electromagnetic geophysics: Notes from the past and the road ahead | Open  

Open Energy Info (EERE)

Electromagnetic geophysics: Notes from the past and the road ahead Electromagnetic geophysics: Notes from the past and the road ahead Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Electromagnetic geophysics: Notes from the past and the road ahead Abstract During the last century, electrical geophysics has been transformed from a simple resistivity method to a modern technology that uses complex data-acquisition systems and high-performance computers for enhanced data modeling and interpretation. Not only the methods and equipment have changed but also our ideas about the geoelectrical models used for interpretation have been modified tremendously. This paper describes the evolution of the conceptual and technical foundations of EM methods. Author Michael S. Zhdanov Published Journal

91

Interactions between mantle plumes and mid-ocean ridges : constraints from geophysics, geochemistry, and geodynamical modeling  

E-Print Network (OSTI)

This thesis studies interactions between mid-ocean ridges and mantle plumes using geophysics, geochemistry, and geodynamical modeling. Chapter 1 investigates the effects of the Marion and Bouvet hotspots on the ultra-slow ...

Georgen, Jennifer E

2001-01-01T23:59:59.000Z

92

On the Use of Emulators with Extreme and Highly Nonlinear Geophysical Simulators  

Science Conference Proceedings (OSTI)

Gaussian process emulators are a powerful tool for understanding complex geophysical simulators, including oceanic and atmospheric general circulation models. Concern has been raised about their ability to emulate complex nonlinear systems. For ...

Robin Tokmakian; Peter Challenor; Yiannis Andrianakis

2012-11-01T23:59:59.000Z

93

The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling  

E-Print Network (OSTI)

Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...

Gregg, Patricia Michelle Marie

2008-01-01T23:59:59.000Z

94

Geophysical imaging methods for analysis of the Krafla Geothermal Field, NE Iceland  

E-Print Network (OSTI)

Joint geophysical imaging techniques have the potential to be reliable methods for characterizing geothermal sites and reservoirs while reducing drilling and production risks. In this study, we applied a finite difference ...

Parker, Beatrice Smith

2012-01-01T23:59:59.000Z

95

Mining geophysical parameters through decision-tree analysis to determine correlation with tropical cyclone development  

Science Conference Proceedings (OSTI)

Correlations between geophysical parameters and tropical cyclones are essential in understanding and predicting the formation of tropical cyclones. Previous studies show that sea surface temperature and vertical wind shear significantly influence the ... Keywords: Data mining, Hurricane, Natural disaster, Prediction

Wenwen Li; Chaowei Yang; Donglian Sun

2009-02-01T23:59:59.000Z

96

Geophysical applications of nuclear resonant spectroscopy Wolfgang Sturhahn and Jennifer M. Jackson*  

E-Print Network (OSTI)

Geophysical applications of nuclear resonant spectroscopy Wolfgang Sturhahn and Jennifer M. Jackson summarize recent developments of nuclear resonant spectroscopy methods like nuclear resonant inelastic x important information on valence, spin state, and magnetic ordering. Both methods use a nuclear resonant

Jackson, Jennifer M.

97

Toward Optimal Choices of Control Space Representation for Geophysical Data Assimilation  

Science Conference Proceedings (OSTI)

In geophysical data assimilation, observations shed light on a control parameter space through a model, a statistical prior, and an optimal combination of these sources of information. This control space can be a set of discrete parameters, or, ...

Marc Bocquet

2009-07-01T23:59:59.000Z

98

GRR/Section 4-AK-b - Geophysical Exploration Permit | Open Energy  

Open Energy Info (EERE)

4-AK-b - Geophysical Exploration Permit 4-AK-b - Geophysical Exploration Permit < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 4-AK-b - Geophysical Exploration Permit 04AKBGeophysicalExplorationPermit.pdf Click to View Fullscreen Contact Agencies Alaska Department of Natural Resources Alaska Division of Oil and Gas Regulations & Policies Alaska Statutes Alaska Administrative Code Triggers None specified Click "Edit With Form" above to add content 04AKBGeophysicalExplorationPermit.pdf Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Flowchart Narrative A Geophysical Exploration Permit is necessary for conducting seismic

99

A suction lysimeter and a geophysical access port  

DOE Patents (OSTI)

A sampling apparatus is described for monitoring vadose zones, geologic media or buried waste in sediment and more particularly to such an apparatus which is operable as an access port for geophysical logging and collecting fluid samples to permit analysis of such fluid samples for the presence of toxic substances, having a pipe-like, stainless steel, longitudinally extending, access tube with two ends, where the first end extends above the surface of the sediment and has a removable air tight seal. The subject invention further has a backing in fluid communication with the access tube and a fluid permeable plate contiguous with the backing, wherein the fluid permeable plate is made up of porous stainless steel. A reservoir is integrated into the second closed end of the access tube for containing the collected fluid. A vacuum pump, having a vacuum gauge/transducer attached thereto, is connected to the removable air tight seal for applying a vacuum to the access tube, such that gas and fluid samples may be drawn through the fluid permeable plate. A fluid sample connector coupled to the removable air tight seal, in addition to the vacuum pump with vacuum gauge/transducer, for withdrawing a fluid sample from the access tube.

Hubbell, J.M.; Sisson, J.B.

1995-12-31T23:59:59.000Z

100

Geophysical study of the Clear Lake region, California  

DOE Green Energy (OSTI)

Results of geophysical studies in the Clear Lake region of California, north of San Francisco, have revealed a prominent, nearly circular negative gravity anomaly with an amplitude of more than 25 milligals (mgal) and an areal extent of approximately 250 square miles and, in addition, a number of smaller positive and negative anomalies. The major negative gravity anomaly is closely associated with the Clear Lake volcanic field and with an area characterized by hot springs and geothermal fields. However, the anomaly cannot be explained by mapped surface geologic features of the area. Aeromagnetic data in the Clear Lake region show no apparent correlation with the major negative gravity anomaly; the local magnetic field is affected principally by serpentine. An electrical resistivity low marks the central part of the gravity minimum, and a concentration of earthquake epicenters characterizes the Clear Lake volcanic field area. The primary cause of the major negative gravity anomaly is believed to be a hot intrusive mass, possibly a magma chamber, that may underlie the Clear Lake volcanic field and vicinity. This mass may serve as a source of heat for the geothermal phenomena in the area. Other smaller gravity anomalies in the Clear Lake region are apparently caused by near-surface geologic features, including relatively dense units of the Franciscan Formation and less dense Cenozoic sedimentary and volcanic rock units.

Chapman, R.H.

1975-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Imaging algorithms for geophysical applications of impedance tomography  

SciTech Connect

The methods of impedance tomography may be employed to obtain images of subsurface electrical and conductivity variations. For practical reasons, voltages and currents are usually applied at locations on the ground surface or down a limited number of boreholes, but almost never over the entire surface of the region being investigated. The geophysical inversion process can be facilitated by constructing algorithms adopted to these particular geometries and to the lack of complete surface data. In this paper we assume that the fluctuations in conductivity are small compared to the background value. The imaging of these fluctuations is carried out exactly within the constraints imposed by the problem geometry. Several possible arrangements of injection and monitoring electrodes are considered. In two dimensions include: Cross-line geometry, current input along one line (borehole) and measurements along a separate parallel line. Single-line geometry, injection and monitoring using the same borehole. Surface reflection geometry, all input and measurement along the ground surface. Theoretical and practical limitations on the image quality produced by the algorithms are discussed. They are applied to several sets of simulated data, and the images produced are displayed and analyzed.

Witten, A.J. (Oak Ridge National Lab., TN (United States)); Molyneux, J.E. (Widener Univ., Dept. of Mechanical Engineering, Chester, PA (United States))

1992-06-02T23:59:59.000Z

102

Turbulent thermal diffusion of aerosols in geophysics and laboratory experiments  

E-Print Network (OSTI)

We discuss a new phenomenon of turbulent thermal diffusion associated with turbulent transport of aerosols in the atmosphere and in laboratory experiments. The essence of this phenomenon is the appearance of a nondiffusive mean flux of particles in the direction of the mean heat flux, which results in the formation of large-scale inhomogeneities in the spatial distribution of aerosols that accumulate in regions of minimum mean temperature of the surrounding fluid. This effect of turbulent thermal diffusion was detected experimentally. In experiments turbulence was generated by two oscillating grids in two directions of the imposed vertical mean temperature gradient. We used Particle Image Velocimetry to determine the turbulent velocity field, and an Image Processing Technique based on an analysis of the intensity of Mie scattering to determine the spatial distribution of aerosols. Analysis of the intensity of laser light Mie scattering by aerosols showed that aerosols accumulate in the vicinity of the minimum mean temperature due to the effect of turbulent thermal diffusion. Geophysical applications of the obtained results are discussed.

A. Eidelman; T. Elperin; N. Kleeorin; A. Krein; I. Rogachevskii; J. Buchholz; G. Gruenefeld

2004-11-11T23:59:59.000Z

103

Geophysical imaging method utilizing backpropagation and zeroth-order phase approximation  

DOE Patents (OSTI)

A method is provided for determining, under field conditions and in near-real time, an image of a geophysical objective under the ground in a geophysical medium, utilizing a zeroth order phase approximation implemented with first signal-to-detector arrival times for a plurality of signal transmitters transmitting signals through the geologic medium and the geologic objective to a plurality of signal receivers, disposed adjacent to the geologic objective in a predetermined manner. 9 figs.

Witten, A.J.

1989-09-12T23:59:59.000Z

104

A Survey of Department of Energy-Sponsored Geophysical Research for Shallow Waste Site Characterization  

Science Conference Proceedings (OSTI)

Subsurface contamination plagues many U.S. Department of Energy (DOE) sites and threatens groundwater supplies. This survey discusses research sponsored by the DOE Environmental Management Science Program (EMSP) for geophysical characterization of the vadose zone at the Idaho National Engineering and Environmental Laboratory (INEEL) and other contaminated sites. Various types of geophysical imaging techniques are used to characterize the shallow subsurfaceelectromagnetic, ground-penetrating radar, electrical, seismic, and nuclear magnetic resonance. Three common themes appear in the research surveyed in this article: (1) the development of high-resolution imaging capabilities to capture important details of the heterogeneous nature of subsurface properties and processes, (2) the coupling of non-intrusive survey geophysical measurements (e.g., electrical surveys) with detailed quantitative precise point-sensor measurements (e.g., lysimeters and vapor-port systems) or borehole (e.g., nuclear magnetic resonance, neutron-based moisture, and geochemical tools) measurements to extend high-precision knowledge away from the borehole, and finally (3) the application of multiple geophysical methods to constrain the uncertainty in determining critical subsurface physical properties. Laboratory, field, theoretical, and computational studies are necessary to develop our understanding of the manner in which contaminants travel through the vadose zone. Applications of geophysical methods to various contaminated areas at the INEEL are given.

Donna Post Guillen

2004-01-01T23:59:59.000Z

105

Geophysical remote sensing of water reservoirs suitable for desalinization.  

Science Conference Proceedings (OSTI)

In many parts of the United States, as well as other regions of the world, competing demands for fresh water or water suitable for desalination are outstripping sustainable supplies. In these areas, new water supplies are necessary to sustain economic development and agricultural uses, as well as support expanding populations, particularly in the Southwestern United States. Increasing the supply of water will more than likely come through desalinization of water reservoirs that are not suitable for present use. Surface-deployed seismic and electromagnetic (EM) methods have the potential for addressing these critical issues within large volumes of an aquifer at a lower cost than drilling and sampling. However, for detailed analysis of the water quality, some sampling utilizing boreholes would be required with geophysical methods being employed to extrapolate these sampled results to non-sampled regions of the aquifer. The research in this report addresses using seismic and EM methods in two complimentary ways to aid in the identification of water reservoirs that are suitable for desalinization. The first method uses the seismic data to constrain the earth structure so that detailed EM modeling can estimate the pore water conductivity, and hence the salinity. The second method utilizes the coupling of seismic and EM waves through the seismo-electric (conversion of seismic energy to electrical energy) and the electro-seismic (conversion of electrical energy to seismic energy) to estimate the salinity of the target aquifer. Analytic 1D solutions to coupled pressure and electric wave propagation demonstrate the types of waves one expects when using a seismic or electric source. A 2D seismo-electric/electro-seismic is developed to demonstrate the coupled seismic and EM system. For finite-difference modeling, the seismic and EM wave propagation algorithms are on different spatial and temporal scales. We present a method to solve multiple, finite-difference physics problems that has application beyond the present use. A limited field experiment was conducted to assess the seismo-electric effect. Due to a variety of problems, the observation of the electric field due to a seismic source is not definitive.

Aldridge, David Franklin; Bartel, Lewis Clark; Bonal, Nedra; Engler, Bruce Phillip

2009-12-01T23:59:59.000Z

106

EETD Researchers at the American Geophysical Union Meeting in San Francisco  

NLE Websites -- All DOE Office Websites (Extended Search)

EETD Researchers at the American Geophysical Union Meeting in San Francisco EETD Researchers at the American Geophysical Union Meeting in San Francisco December 9-13 December 2013 A number of scientists from the Environmental Energy Technologies Division are presenting papers and posters at the American Geophysical Union Meeting next week in San Francisco. Here are brief descriptions of one talk and two posters by EETD scientists and their colleagues. For more information, go to the AGU meeting site at the link below, where you can look up presentations by scientists from EETD and other divisions of Lawrence Berkeley National Laboratory. Energy-Water Integrated Assessment of the Sacramento Area and a Demonstration of WEAP-LEAP Capability Poster Monday, December 9, 2013, 8 AM - 12 PM Hall A-C Moscone South Researchers from EETD and partner institutions report on a new basin-scale

107

A Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles  

Open Energy Info (EERE)

Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles Caldera, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles Caldera, New Mexico Details Activities (10) Areas (2) Regions (0) Abstract: The Baca location #1 geothermal field is located in north-central New Mexico within the western half of the Plio-Pleistocene Valles Caldera. Steam and hot water are produced primarily from the northeast-trending Redondo Creek graben, where downhole temperatures exceed 260°C at depths of less than 2 km. Stratigraphically the reservoir region can be described as a five-layer sequence that includes Tertiary and Quaternary volcanic rocks, and Mesozoic and Tertiary sediments overlying Precambrian granitic

108

Geophysical technique for mineral exploration and discrimination based on electromagnetic methods and associated systems  

DOE Patents (OSTI)

Mineral exploration needs a reliable method to distinguish between uneconomic mineral deposits and economic mineralization. A method and system includes a geophysical technique for subsurface material characterization, mineral exploration and mineral discrimination. The technique introduced in this invention detects induced polarization effects in electromagnetic data and uses remote geophysical observations to determine the parameters of an effective conductivity relaxation model using a composite analytical multi-phase model of the rock formations. The conductivity relaxation model and analytical model can be used to determine parameters related by analytical expressions to the physical characteristics of the microstructure of the rocks and minerals. These parameters are ultimately used for the discrimination of different components in underground formations, and in this way provide an ability to distinguish between uneconomic mineral deposits and zones of economic mineralization using geophysical remote sensing technology.

Zhdanov; Michael S. (Salt Lake City, UT)

2008-01-29T23:59:59.000Z

109

Status of data, major results, and plans for geophysical activities, Yucca Mountain Project  

Science Conference Proceedings (OSTI)

This report describes past and planned geophysical activities associated with the Yucca Mountain Project and is intended to serve as a starting point for integration of geophysical activities. This report relates past results to site characterization plans, as presented in the Yucca Mountain Site Characterization Plan (SCP). This report discusses seismic exploration, potential field methods, geoelectrical methods, teleseismic data collection and velocity structural modeling, and remote sensing. This report discusses surface-based, airborne, borehole, surface-to-borehole, crosshole, and Exploratory Shaft Facility-related activities. The data described in this paper, and the publications discussed, have been selected based on several considerations; location with respect to Yucca Mountain, whether the success or failure of geophysical data is important to future activities, elucidation of features of interest, and judgment as to the likelihood that the method will produce information that is important for site characterization. 65 refs., 19 figs., 12 tabs.

Oliver, H.W. [Geological Survey, Menlo Park, CA (USA); Hardin, E.L. [Science Applications International Corp., Las Vegas, NV (USA); Nelson, P.H. [Geological Survey, Denver, CO (USA)] [eds.

1990-07-01T23:59:59.000Z

110

Geophysical Surveys of a Known Karst Feature, Oak Ridge Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect

Geophysical data were acquired at a site on the Oak Ridge Reservation, Tennessee to determine the characteristics of a mud-filled void and to evaluate the effectiveness of a suite of geophysical methods at the site. Methods that were used included microgravity, electrical resistivity, and seismic refraction. Both microgravity and resistivity were able to detect the void as well as overlying structural features. The seismic data provide bedrock depth control for the other two methods, and show other effects that are caused by the void.

Carpenter, P.J.; Carr, B.J.; Doll, W.E.; Kaufmann, R.D.; Nyquist, J.E.

1999-11-14T23:59:59.000Z

111

Geophysical Surveys of a Known Karst Feature, Oak Ridge Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect

Geophysical data were acquired at a site on the Oak Ridge Reservation, Tennessee to determine the characteristics of a mud-filled void and to evaluate the effectiveness of a suite of geophysical methods at the site. Methods that were used included microgravity, electrical resistivity, and seismic refraction. Both microgravity and resistivity were able to detect the void as well as overlying structural features. The seismic data provide bedrock depth control for the other two methods, and show other effects that are caused by the void.

Doll, W.E.; Nyquist, J.E.; Carpenter, P.J.; Kaufmann, R.D.; Carr, B.J.

1998-12-01T23:59:59.000Z

112

Mapping groundwater contamination using dc resistivity and VLF geophysical methods -- A case study  

SciTech Connect

Geophysical methods can be helpful in mapping areas of contaminated soil and groundwater. Electrical resistivity and very low-frequency electromagnetic induction (VLF) surveys were carried out at a site of shallow hydrocarbon contamination in Utah County, Utah. Previously installed monitoring wells facilitated analysis of water chemistry to enhance interpretation of the geophysical data. The electrical resistivity and VLF data correlate well, and vertical cross-sections and contour maps generated from these data helped map the contaminant plume, which was delineated as an area of high interpreted resistivities.

Benson, A.K.; Payne, K.L.; Stubben, M.A. [Brigham Young Univ., Provo, UT (United States). Dept. of Geology and Geophysics

1997-01-01T23:59:59.000Z

113

Geothermal Geophysical Research in Electrical Methods at UURI  

DOE Green Energy (OSTI)

The principal objective of electrical geophysical research at UURI has been to provide reliable exploration and reservoir assessment tools for the shallowest to the deepest levels of interest in geothermal fields. Three diverse methods are being considered currently: magnetotellurics (MT, and CSAMT), self-potential, and borehole resistivity. Primary shortcomings in the methods addressed have included a lack of proper interpretation tools to treat the effects of the inhomogeneous structures often encountered in geothermal systems, a lack of field data of sufficient accuracy and quantity to provide well-focused models of subsurface resistivity structure, and a poor understanding of the relation of resistivity to geothermal systems and physicochemical conditions in the earth generally. In MT, for example, interpretation research has focused successfully on the applicability of 2-D models in 3-D areas which show a preferred structural grain. Leading computer algorithms for 2-D and 3-D simulation have resulted and are combined with modern methods of regularized inversion. However, 3-D data coverage and interpretation is seen as a high priority. High data quality in our own research surveys has been assured by implementing a fully remote reference with digital FM telemetry and real-time processing with data coherence sorting. A detailed MT profile across Long Valley has mapped a caldera-wide altered tuff unit serving as the primary hydrothermal aquifer, and identified a low-resistivity body in the middle crust under the west moat which corresponds closely with teleseismic delay and low density models. In the CSAMT method, our extensive tensor survey over the Sulphur Springs geothermal system provides valuable structural information on this important thermal regime and allows a fundamental analysis of the CSAMT method in heterogeneous areas. The self-potential (SP) method is promoted as an early-stage, cost-effective, exploration technique for covered hydrothermal resources, of low to high temperature, which has little or no adverse environmental impact and yields specific targets for temperature gradient and fluid chemistry testing. Substantial progress has been made in characterizing SP responses for several known, covered geothermal systems in the Basin and Range and southern Rio Grande Rift, and at identifying likely, causative source areas of thermal fluids. (Quantifying buried SP sources requires detailed knowledge of the resistivity structure, obtainable through DC or CSAMT surveys with 2-D or 3-D modeling.) Borehole resistivity (BHR) methods may help define hot and permeable zones in geothermal systems, trace the flow of cooler injected fluids and determine the degree of-water saturation in vapor dominated systems. At UURI, we develop methods to perform field surveys and to model and interpret various borehole-to-borehole, borehole-to-surface and surface-to-borehole arrays. The status of our BHR research may be summarized as follows: (1) forward modeling algorithms have been developed and published to evaluate numerous resistivity methods and to examine the effects of well-casing and noise; (2) two inverse two-dimensional algorithms have been devised and successfully applied to simulated field data; (3) a patented, multi-array resistivity system has been designed and is under construction; and (4) we are seeking appropriate wells in geothermal and other areas in which to test the methods.

Wannamaker, Philip E.; Wright, Phillip M.

1992-03-24T23:59:59.000Z

114

Hagit P. Affek Yale University, Dept. of Geology & Geophysics, 210 Whitney Ave. New Haven, CT 06520-8109  

E-Print Network (OSTI)

and Geophysics. · Caltech, Pasadena, CA. 2003-2007. Posdoc in Isotope geochemistry. Department of GeologicalHagit P. Affek Yale University, Dept. of Geology & Geophysics, 210 Whitney Ave. New Haven, CT 06520 Plants: Physiological Role and Isotopic Composition. Adviser: Dan Yakir. Professional experience · Yale

115

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan  

E-Print Network (OSTI)

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan C the South Caspian Sea, offshore Azerbaijan, document for the ®rst time in the deep water (up to 650 m Caspian Sea. The Absheron block, named after the nearby Absheron Peninsula in Azerbaijan, is situated

Knapp, Camelia Cristina

116

Assessment of surface geophysical methods in geothermal exploration and recommendations for future research  

DOE Green Energy (OSTI)

The four classes of geophysical methods considered are: passive seismic methods; active seismic methods; natural field electrical and electromagnetic methods; and, controlled-source electrical and electromagnetic methods. Areas of rsearch for improvement of the various techniques for geothermal exploration are identified. (JGB)

Goldstein, N.E.; Norris, R.A.; Wilt, M.J.

1978-01-01T23:59:59.000Z

117

CV-Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana  

E-Print Network (OSTI)

chemistry & Stable isotopes Postdoc 1998-2001 APPOINTMENTS 2012- Charles L. Jones Professor in Geology Geology and Earth System History for undergraduate students; Stable Isotope Geochemistry and Carbonate1 CV- Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex

Bao, Huiming

118

CV-Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana  

E-Print Network (OSTI)

1 CV- Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex Palaeontology & Stratigraphy B. Sc. 1982-1986 Nanjing Institute of Geology and Paleontology, Academia Sinica Calcareous Algae & carbonate sedimentology M.Sc. 1986-1989 Princeton University Stable isotope geochemistry

Bao, Huiming

119

CV-Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana  

E-Print Network (OSTI)

chemistry & Stable isotopes Postdoc 1998-2001 APPOINTMENTS 2012- Charles L. Jones Professor in Geology, 2013, Oxygen isotope composition of meltwater from a Neoproterozoic glaciation in South China. Geology1 CV- Huiming Bao Department of Geology & Geophysics, E235 Howe-Russell Geoscience Complex

Bao, Huiming

120

Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada  

SciTech Connect

In the consideration of Yucca Mountain as a possible site for storing high level nuclear waste, a number of geologic concerns have been suggested for study by the National Academy of Sciences which include: (1) natural geologic and geochemical barriers, (2) possible future fluctuations in the water table that might flood a mined underground repository, (3) tectonic stability, and (4) considerations of shaking such as might be caused by nearby earthquakes or possible volcanic eruptions. This volume represents the third part of an overall plan of geophysical investigation of Yucca Mountain, preceded by the Site Characterization Plan (SCP; dated 1988) and the report referred to as the Geophysical White Paper, Phase 1, entitled Status of Data, Major Results, and Plans for Geophysical Activities, Yucca Mountain Project (Oliver and others, 1990). The SCP necessarily contained uncertainty about applicability and accuracy of methods then untried in the Yucca Mountain volcano-tectonic setting, and the White Paper, Phase 1, focused on summarization of survey coverage, data quality, and applicability of results. For the most part, it did not present data or interpretation. The important distinction of the current volume lies in presentation of data, results, and interpretations of selected geophysical methods used in characterization activities at Yucca Mountain. Chapters are included on the following: gravity investigations; magnetic investigations; regional magnetotelluric investigations; seismic refraction investigations; seismic reflection investigations; teleseismic investigations; regional thermal setting; stress measurements; and integration of methods and conclusions. 8 refs., 60 figs., 2 tabs.

Oliver, H.W.; Ponce, D.A. [eds.] [Geological Survey, Menlo Park, CA (United States); Hunter, W.C. [ed.] [Geological Survey, Denver, CO (United States). Yucca Mountain Project Branch

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Geological and geophysical studies in Grass Valley, Nevada. Preliminary open file report  

DOE Green Energy (OSTI)

The geologic setting, geochemistry, and heat flow of the Leach Hot Springs area are discussed. Geophysical data is presented under the following section headings: survey lines; presentation of data; gravity survey; magnetic survey; self-potential; bipole-dipole apparent resistivity and apparent conductance; electric field ratio tellurics; dipole-dipole resistivity; magnetotellurics; seismological methods; seismic data and preliminary interpretation. (JGB)

Beyer, H.; Dey, A.; Liaw, A.; Majer, E.; McEvilly, T.V.; Morrison, H.F.; Wollenberg, H.

1976-09-01T23:59:59.000Z

122

GEOPHYSICS, VOL. 64, NO. 5 (SEPTEMBER-OCTOBER 1999); P. 13471348 Computers and creativity  

E-Print Network (OSTI)

GEOPHYSICS, VOL. 64, NO. 5 (SEPTEMBER-OCTOBER 1999); P. 1347­1348 Computers and creativity John A. Scales and Roel Snieder "The real danger is not that computers will begin to think like men, but that men will begin to think like computers."--Sydney J. Harris "Technical skill is mastery of complexity while

Scales, John

123

Investigation of novel geophysical techniques for monitoring CO2 movement during sequestration  

Science Conference Proceedings (OSTI)

Cost effective monitoring of reservoir fluid movement during CO{sub 2} sequestration is a necessary part of a practical geologic sequestration strategy. Current petroleum industry seismic techniques are well developed for monitoring production in petroleum reservoirs. The cost of time-lapse seismic monitoring can be born because the cost to benefit ratio is small in the production of profit making hydrocarbon. However, the cost of seismic monitoring techniques is more difficult to justify in an environment of sequestration where the process produces no direct profit. For this reasons other geophysical techniques, which might provide sufficient monitoring resolution at a significantly lower cost, need to be considered. In order to evaluate alternative geophysical monitoring techniques we have undertaken a series of numerical simulations of CO{sub 2} sequestration scenarios. These scenarios have included existing projects (Sleipner in the North Sea), future planned projects (GeoSeq Liberty test in South Texas and Schrader Bluff in Alaska) as well as hypothetical models based on generic geologic settings potentially attractive for CO{sub 2} sequestration. In addition, we have done considerable work on geophysical monitoring of CO{sub 2} injection into existing oil and gas fields, including a model study of the Weyburn CO{sub 2} project in Canada and the Chevron Lost Hills CO{sub 2} pilot in Southern California (Hoversten et al. 2003). Although we are specifically interested in considering ''novel'' geophysical techniques for monitoring we have chosen to include more traditional seismic techniques as a bench mark so that any quantitative results derived for non-seismic techniques can be directly compared to the industry standard seismic results. This approach will put all of our finding for ''novel'' techniques in the context of the seismic method and allow a quantitative analysis of the cost/benefit ratios of the newly considered methods compared to the traditional, more expensive, seismic technique. The Schrader Bluff model was chosen as a numerical test bed for quantitative comparison of the spatial resolution of various geophysical techniques being considered for CO{sub 2} sequestration monitoring. We began with a three dimensional flow simulation model provided by BP Alaska of the reservoir and developed a detailed rock-properties model from log data that provides the link between the reservoir parameters (porosity, pressure, saturations, etc.) and the geophysical parameters (velocity, density, electrical resistivity). The rock properties model was used to produce geophysical models from the flow simulations.

Hoversten, G. Michael; Gasperikova, Erika

2003-10-31T23:59:59.000Z

124

Geophysical framework of the southwestern Nevada volcanic field and hydrogeologic implications  

DOE Green Energy (OSTI)

Gravity and magnetic data, when integrated with other geophysical, geological, and rock-property data, provide a regional framework to view the subsurface geology in the southwestern Nevada volcanic field. The authors have loosely divided the region into six domains based on structural style and overall geophysical character. For each domain, they review the subsurface tectonic and magmatic features that have been inferred or interpreted from previous geophysical work. Where possible, they note abrupt changes in geophysical fields as evidence for potential structural or lithologic control on ground-water flow. They use inferred lithology to suggest associated hydrogeologic units in the subsurface. The resulting framework provides a basis for investigators to develop hypotheses for regional ground-water pathways where no drill-hole information exists. The authors discuss subsurface features in the northwestern part of the Nevada Test Site and west of the Nevada Test Site in more detail to address potential controls on regional ground-water flow away from areas of underground nuclear-weapons testing at Pahute Mesa. Subsurface features of hydrogeologic importance in these areas are (1) the resurgent intrusion below Timber Mountain, (2) a NNE-trending fault system coinciding with western margins of the Silent Canyon and Timber Mountain caldera complexes, (3) a north-striking, buried fault east of Oasis Mountain extending for 15 km, which they call the Hogback fault, and (4) an east-striking transverse fault or accommodation zone that, in part, bounds Oasis Valley basin on the south, which they call the Hot Springs fault. In addition, there is no geophysical nor geologic evidence for a substantial change in subsurface physical properties within a corridor extending from the northwestern corner of the Rainier Mesa caldera to Oasis Valley basin (east of Oasis Valley discharge area). This observation supports the hypothesis of other investigators that regional ground water from Pahute Mesa is likely to follow a flow path that extends southwestward to Oasis Valley discharge area.

Grauch, V.J.S.; Sawyer, D.A.; Fridrich, C.J.; Hudson, M.R.

2000-06-08T23:59:59.000Z

125

Modeling and Evaluation of Geophysical Methods for Monitoring and Tracking CO2 Migration  

Science Conference Proceedings (OSTI)

Geological sequestration has been proposed as a viable option for mitigating the vast amount of CO{sub 2} being released into the atmosphere daily. Test sites for CO{sub 2} injection have been appearing across the world to ascertain the feasibility of capturing and sequestering carbon dioxide. A major concern with full scale implementation is monitoring and verifying the permanence of injected CO{sub 2}. Geophysical methods, an exploration industry standard, are non-invasive imaging techniques that can be implemented to address that concern. Geophysical methods, seismic and electromagnetic, play a crucial role in monitoring the subsurface pre- and post-injection. Seismic techniques have been the most popular but electromagnetic methods are gaining interest. The primary goal of this project was to develop a new geophysical tool, a software program called GphyzCO2, to investigate the implementation of geophysical monitoring for detecting injected CO{sub 2} at test sites. The GphyzCO2 software consists of interconnected programs that encompass well logging, seismic, and electromagnetic methods. The software enables users to design and execute 3D surface-to-surface (conventional surface seismic) and borehole-to-borehole (cross-hole seismic and electromagnetic methods) numerical modeling surveys. The generalized flow of the program begins with building a complex 3D subsurface geological model, assigning properties to the models that mimic a potential CO{sub 2} injection site, numerically forward model a geophysical survey, and analyze the results. A test site located in Warren County, Ohio was selected as the test site for the full implementation of GphyzCO2. Specific interest was placed on a potential reservoir target, the Mount Simon Sandstone, and cap rock, the Eau Claire Formation. Analysis of the test site included well log data, physical property measurements (porosity), core sample resistivity measurements, calculating electrical permittivity values, seismic data collection, and seismic interpretation. The data was input into GphyzCO2 to demonstrate a full implementation of the software capabilities. Part of the implementation investigated the limits of using geophysical methods to monitor CO{sub 2} injection sites. The results show that cross-hole EM numerical surveys are limited to under 100 meter borehole separation. Those results were utilized in executing numerical EM surveys that contain hypothetical CO{sub 2} injections. The outcome of the forward modeling shows that EM methods can detect the presence of CO{sub 2}.

Daniels, Jeff

2012-11-30T23:59:59.000Z

126

A Hydrologic-geophysical Method for Characterizing Flow and Transport Processes Within The Vadose Zone  

SciTech Connect

The primary purpose of this project was to employ two geophysical imaging techniques, electrical resistivity tomography and cross-borehole ground penetrating radar, to image a controlled infiltration of a saline tracer under unsaturated flow conditions. The geophysical techniques have been correlated to other more traditional hydrologic measurements including neutron moisture measurements and induction conductivity logs. Images that resulted during two successive infiltrations indicate the development of what appear to be preferential pathways through the finer grained materials, although the results could also be produced by cationic capture of free ions in clays. In addition the site as well as the developing solute plume exhibits electrical anisotropy which is likely related to flow properties. However the geologic significance of this phenomenon is still under investigation.

David Alumbaugh; Douglas LaBrecque; James Brainard; T.C. (Jim) Yeh

2004-01-22T23:59:59.000Z

127

Hydrologic and geophysical studies at Midnite Mine, Wellpinit, WA: Summary of 1995 field season. Report of investigations/1996  

SciTech Connect

The Midnite Mine is an inactive, hard-rock uranium mine on the Spokane Indian Reservation in Washington State. Long-term changes in water quality and the results of slug tests and two geophysical surveys are described. Of the locations monitored, only two exhibited water quality degradation over time. Hydraulic conductivity measurements from slug tests are reported for five additional locations in the bedrock. Relative values of hydraulic conductivity from slug tests agreed well with ranked specific capacity data. A geophysical survey identified buried constructed features that channel subsurface water to a contaminated seep. Historic aerial photos corroborated the results of the geophysical study. A new geophysical technique was successfully used to monitor hydraulic and geochemical responses to a pumping test in saturated waste rock.

Williams, B.C.; Riley, J.A.; Montgomery, J.R.; Robinson, J.A.

1996-06-01T23:59:59.000Z

128

SURFACE GEOPHYSICAL EXPLORATION OF SX TANK FARM AT THE HANFORD SITE RESULTS OF BACKGROUND CHARACTERIZATION WITH MAGNETICS AND ELECTROMAGNETICS  

SciTech Connect

This report presents the results of the background characterization of the cribs and trenches surrounding the SX tank farm prepared by HydroGEOPHYSICS Inc, Columbia Energy & Environmental Services Inc and Washington River Protection Solutions.

MYERS DA; RUCKER D; LEVIT M; CUBBAGE B; HENDERSON C

2009-09-24T23:59:59.000Z

129

Highlights of the 2009 SEG summer research workshop on ""CO2 sequestration geophysics  

SciTech Connect

The 2009 SEG Summer Research Workshop on 'CO{sub 2} Sequestration Geophysics' was held August 23-27, 2009 in Banff, Canada. The event was attended by over 100 scientists from around the world, which proved to be a remarkably successful turnout in the midst of the current global financial crisis and severe corporate travel restrictions. Attendees included SEG President Larry Lines (U. Calgary), and CSEG President John Downton (CGG Veritas), who joined SRW Chairman David Lumley (UWA) in giving the opening welcome remarks at the Sunday Icebreaker. The workshop was organized by an expert technical committee representing a good mix of industry, academic, and government research organizations. The format consisted of four days of technical sessions with over 60 talks and posters, plus an optional pre-workshop field trip to the Columbia Ice Fields to view firsthand the effects of global warming on the Athabasca glacier. Group technical discussion was encouraged by requiring each presenter to limit themselves to 15 minutes of presentation followed by a 15 minute open discussion period. Technical contributions focused on the current and future role of geophysics in CO{sub 2} sequestration, highlighting new research and field-test results with regard to site selection and characterization, monitoring and surveillance, using a wide array of geophysical techniques. While there are too many excellent contributions to mention all individually here, in this paper we summarize some of the key workshop highlights in order to propagate new developments to the SEG community at large.

Huang, Lianjie [Los Alamos National Laboratory; Lumley, David [U. W. AUSTRALIA; Sherlock, Don [CHEVRON; Daley, Tom [LBNL; Lawton, Don [U CALGARY; Masters, Ron [SHELL; Verliac, Michel [SCHLUMBERGER; White, Don [GEOL. SURVEY CANADA

2009-01-01T23:59:59.000Z

130

Karst characterization in a semi-arid region using gravity, seismic, and resistivity geophysical techniques.  

SciTech Connect

We proposed to customize emerging in situ geophysical monitoring technology to generate time-series data during sporadic rain events in a semi-arid region. Electrodes were to be connected to wireless %5Cnodes%22 which can be left in the eld for many months. Embedded software would then increase sampling frequency during periods of rainfall. We hypothesized that this contrast between no-volume ow in karst passageways dur- ing dry periods and partial- or saturated-volume ow during a rain event is detectable by these Wireless Sensor Network (WSN) geophysical nodes, we call this a Wireless Resistivity Network (WRN). The development of new methodologies to characterize semi-arid karst hydrology is intended to augment Sandia National Laboratorys mission to lead e orts in energy technologies, waste disposal and climate security by helping to identify safe and secure regions and those that are at risk. Development and initial eld testing identi ed technological barriers to using WRNs for identifying semi-arid karst, exposing R&D which can be targeted in the future. Gravity, seismic, and resis- tivity surveys elucidated how each technique might e ectively be used to characterize semi-arid karst. This research brings to light the importance and challenges with char- acterizing semi-arid karst through a multi-method geophysical study. As there have been very few studies with this emphasis, this study has expanded the body of practical experience needed to protect the nations water and energy security interests.

Barnhart, Kevin Scott

2013-10-01T23:59:59.000Z

131

Highlights of the 2009 SEG summer research workshop on"CO2 Sequestration Geophysics"  

Science Conference Proceedings (OSTI)

The 2009 SEG Summer Research Workshop on CO2 Sequestration Geophysics was held August 23-27, 2009 in Banff, Canada. The event was attended by over 100 scientists from around the world, which proved to be a remarkably successful turnout in the midst of the current global financial crisis and severe corporate travel restrictions. Attendees included SEG President Larry Lines (U. Calgary), and CSEG President John Downton (CGG Veritas), who joined SRW Chairman David Lumley (UWA) in giving the opening welcome remarks at the Sunday Icebreaker. The workshop was organized by an expert technical committee (see side bar) representing a good mix of industry, academic, and government research organizations. The format consisted of four days of technical sessions with over 60 talks and posters, plus an optional pre-workshop field trip to the Columbia Ice Fields to view firsthand the effects of global warming on the Athabasca glacier (Figures 1-2). Group technical discussion was encouraged by requiring each presenter to limit themselves to 15 minutes of presentation followed by a 15 minute open discussion period. Technical contributions focused on the current and future role of geophysics in CO2 sequestration, highlighting new research and field-test results with regard to site selection and characterization, monitoring and surveillance, using a wide array of geophysical techniques. While there are too many excellent contributions to mention all individually here, in this paper we summarize some of the key workshop highlights in order to propagate new developments to the SEG community at large.

Lumley, D.; Sherlock, D.; Daley, T.; Huang, L.; Lawton, D.; Masters, R.; Verliac, M.; White, D.

2010-01-15T23:59:59.000Z

132

Large Scale Computing Requirements for Basic Energy Sciences (An BES / ASCR / NERSC Workshop) Hilton Washington DC/Rockville Meeting Center, Rockville MD 3D Geophysical Imaging  

NLE Websites -- All DOE Office Websites (Extended Search)

Requirements Requirements for Basic Energy Sciences (An BES / ASCR / NERSC Workshop) Hilton Washington DC/Rockville Meeting Center, Rockville MD 3D Geophysical Modeling and Imaging G. A. Newman Lawrence Berkeley National Laboratory February 9 - 10 , 2010 Talk Outline * SEAM Geophysical Modeling Project - Its Really Big! * Geophysical Imaging (Seismic & EM) - Its 10 to 100x Bigger! - Reverse Time Migration - Full Waveform Inversion - 3D Imaging & Large Scale Considerations - Offshore Brazil Imaging Example (EM Data Set) * Computational Bottlenecks * Computing Alternatives - GPU's & FPGA's - Issues Why ? So that the resource industry can tackle grand geophysical challenges (Subsalt imaging, land acquisition, 4-D, CO2, carbonates ......) SEAM Mission Advance the science and technology of applied

133

Fluid Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical  

Open Energy Info (EERE)

Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Inverse Modeling Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Fluid Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Inverse Modeling Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Fluid Imaging Project Description EGS has been defined as enhanced reservoirs that have been created to extract economical amounts of heat from low permeability and/or porosity geothermal resources. Critical to the success of EGS is the successful manipulation of fluids in the subsurface to enhance permeability. Knowledge in the change in volume and location of fluids in the rocks and fractures (both natural and induced) will be needed to manage injection strategies such as the number and location of step out wells, in-fill wells and the ratio of injection to production wells. The key difficulty in manipulating fluids has been our inability to reliably predict their locations, movements and concentrations. We believe combining data from MEQ and electrical surveys has the potential to overcome these problems and can meet many of the above needs, economically. Induced seismicity is currently viewed as one of the essential methods for inferring the success of creating fracture permeability and fluid paths during large scale EGS injections. Fluids are obviously playing a critical role in inducing the seismicity, however, other effects such as thermal, geochemical and stress redistribution, etc. may also play a role.

134

Comparative assessment of five potential sites for magma: hydrothermal systems - geophysics  

DOE Green Energy (OSTI)

As part of a comparative assessment for the Continental Scientific Drilling Program, geophysical data were used, to characterize and evaluate potential magma-hydrothermal targets at five drill sites in the western United States. The sites include Roosevelt Hot Springs, Utah, the Rio Grande Rift, New Mexico, and The Geysers-Clear Lake, Long Valley, and Salton Trough areas, California. This summary discusses the size, depth, temperature, and setting of each potential target, as well as relvant scientific questions about their natures and the certainty of their existence.

Kasameyer, P.

1980-09-02T23:59:59.000Z

135

Terracentric Nuclear Fission Reactor: Background, Basis, Feasibility, Structure, Evidence, and Geophysical Implications  

E-Print Network (OSTI)

The background, basis, feasibility, structure, evidence, and geophysical implications of a naturally occurring Terracentric nuclear fission georeactor are reviewed. For a nuclear fission reactor to exist at the center of the Earth, all of the following conditions must be met: (1) There must originally have been a substantial quantity of uranium within Earth's core; (2) There must be a natural mechanism for concentrating the uranium; (3) The isotopic composition of the uranium at the onset of fission must be appropriate to sustain a nuclear fission chain reaction; (4) The reactor must be able to breed a sufficient quantity of fissile nuclides to permit operation over the lifetime of Earth to the present; (5) There must be a natural mechanism for the removal of fission products; (6) There must be a natural mechanism for removing heat from the reactor; (7) There must be a natural mechanism to regulate reactor power level, and; (8) The location of the reactor or must be such as to provide containment and prevent meltdown. Herndon's georeactor alone is shown to meet those conditions. Georeactor existence evidence based upon helium measurements and upon antineutrino measurements is described. Geophysical implications discussed include georeactor origin of the geomagnetic field, geomagnetic reversals from intense solar outbursts and severe Earth trauma, as well as georeactor heat contributions to global dynamics.

J. Marvin Herndon

2013-08-23T23:59:59.000Z

136

Radioactive Waste Isolation in Salt: Peer review of documents dealing with geophysical investigations  

Science Conference Proceedings (OSTI)

The Salt Repository Project, a US Department of Energy program to develop a mined repository in salt for high-level radioactive waste, is governed by a complex and sometimes inconsistent array of laws, administrative regulations, guidelines, and position papers. In conducting multidisciplinary peer reviews of contractor documents in support of this project, Argonne National Laboratory has needed to inform its expert reviewers of these governmental mandates, with particular emphasis on the relationship between issues and the technical work undertaken. This report acquaints peer review panelists with the regulatory framework as it affects their reviews of site characterization plans and related documents, including surface-based and underground test plans. Panelists will be asked to consider repository performance objectives and issues as they judge the adequacy of proposed geophysical testing. All site-specific discussions relate to the Deaf Smith County site in Texas, which was approved for site characterization by the President in May 1986. Natural processes active at the Deaf Smith County site and the status of geophysical testing near the site are reviewed briefly. 25 refs., 4 figs., 5 tabs.

McGinnis, L.D.; Bowen, R.H.

1987-03-01T23:59:59.000Z

137

Post-Injection Geophysical Evaluation of the Winding Ridge Site CRADA 98-F012, Final Report  

SciTech Connect

Acid mine drainage (AMD) from underground mines is a major environmental problem. The disposal of coal combustion by-products (CCB) is also a major national problem due to the large volumes produced annually and the economics associated with transportation and environmentally safe disposal. The concept of returning large volumes of the CCB to their point of origin, underground mines, and using the typically alkaline and pozzolanic attributes of the waste material for the remediation of AMD has been researched rather diligently during the past few years by various federal and state agencies and universities. As the result, the State of Maryland initiated a full-scale demonstration of this concept in a small, 5-acre, unmapped underground mine located near Friendsville, MD. Through a cooperative agreement between the State of Maryland and the U.S. Department of Energy, several geophysical techniques were evaluated as potential tools for the post-injection evaluation of the underground mine site. Three non-intrusive geophysical surveys, two electromagnetic (EM) techniques and magnetometry, were conducted over the Frazee Mine, which is located on Winding Ridge near Friendsville, MD. The EM surveys were conducted to locate ground water in both mine void and overburden. The presence of magnetite, which is naturally inherent to CCB'S due to the combustion process and essentially transparent in sedimentary rock, provided the reason for using magnetometry to locate the final resting place of the CCB grout.

Connie Lyons; Richard Current; Terry Ackman

1998-09-16T23:59:59.000Z

138

Comparison of Geophysical Model Functions for SAR Wind Speed Retrieval in Japanese Coastal Waters  

E-Print Network (OSTI)

Abstract: This work discusses the accuracies of geophysical model functions (GMFs) for retrieval of sea surface wind speed from satellite-borne Synthetic Aperture Radar (SAR) images in Japanese coastal waters characterized by short fetches and variable atmospheric stability conditions. In situ observations from two validation sites, Hiratsuka and Shirahama, are used for comparison of the retrieved sea surface wind speeds using CMOD (C-band model)4, CMOD_IFR2, CMOD5 and CMOD5.N. Of all the geophysical model functions (GMFs), the latest C-band GMF, CMOD5.N, has the smallest bias and root mean square error at both sites. All of the GMFs exhibit a negative bias in the retrieved wind speed. In order to understand the reason for this bias, all SAR-retrieved wind speeds are separated into two categories: onshore wind (blowing from sea to land) and offshore wind (blowing from land to sea). Only offshore winds were found to exhibit the large negative bias, and short fetches from the coastline may be a possible reason for this. Moreover, it is clarified that in both the unstable and stable conditions, CMOD5.N has atmospheric stability effectiveness, and can keep the same accuracy with CMOD5 in the neutral condition. In short, at the moment, CMOD5.N is thought to be the most promising GMF

Yuko Takeyama; Teruo Ohsawa; Katsutoshi Kozai; Charlotte Bay Hasager; Merete Badger

2013-01-01T23:59:59.000Z

139

Geophysical monitoring and reactive transport modeling of ureolytically-driven calcium carbonate precipitation  

SciTech Connect

Ureolytically-driven calcium carbonate precipitation is the basis for a promising in-situ remediation method for sequestration of divalent radionuclide and trace metal ions. It has also been proposed for use in geotechnical engineering for soil strengthening applications. Monitoring the occurrence, spatial distribution, and temporal evolution of calcium carbonate precipitation in the subsurface is critical for evaluating the performance of this technology and for developing the predictive models needed for engineering application. In this study, we conducted laboratory column experiments using natural sediment and groundwater to evaluate the utility of geophysical (complex resistivity and seismic) sensing methods, dynamic synchrotron x-ray computed tomography (micro-CT), and reactive transport modeling for tracking ureolytically-driven calcium carbonate precipitation processes under site relevant conditions. Reactive transport modeling with TOUGHREACT successfully simulated the changes of the major chemical components during urea hydrolysis. Even at the relatively low level of urea hydrolysis observed in the experiments, the simulations predicted an enhanced calcium carbonate precipitation rate that was 3-4 times greater than the baseline level. Reactive transport modeling results, geophysical monitoring data and micro-CT imaging correlated well with reaction processes validated by geochemical data. In particular, increases in ionic strength of the pore fluid during urea hydrolysis predicted by geochemical modeling were successfully captured by electrical conductivity measurements and confirmed by geochemical data. The low level of urea hydrolysis and calcium carbonate precipitation suggested by the model and geochemical data was corroborated by minor changes in seismic P-wave velocity measurements and micro-CT imaging; the latter provided direct evidence of sparsely distributed calcium carbonate precipitation. Ion exchange processes promoted through NH{sub 4}{sup +} production during urea hydrolysis were incorporated in the model and captured critical changes in the major metal species. The electrical phase increases were potentially due to ion exchange processes that modified charge structure at mineral/water interfaces. Our study revealed the potential of geophysical monitoring for geochemical changes during urea hydrolysis and the advantages of combining multiple approaches to understand complex biogeochemical processes in the subsurface.

Wu, Y.; Ajo-Franklin, J.B.; Spycher, N.; Hubbard, S.S.; Zhang, G.; Williams, K.H.; Taylor, J.; Fujita, Y.; Smith, R.

2011-07-15T23:59:59.000Z

140

Geological, Geophysical, And Thermal Characteristics Of The Salton Sea Geothermal Field, California  

DOE Green Energy (OSTI)

The Salton Sea Geothermal Field is the largest water-dominated geothermal field in the Salton Trough in Southern California. Within the trough, local zones of extension among active right-stepping right-lateral strike-slip faults allow mantle-derived magmas to intrude the sedimentary sequence. The intrusions serves as heat sources to drive hydrothermal systems. We can characterize the field in detail because we have an extensive geological and geophysical data base. The sediments are relatively undeformed and can be divided into three categories as a function of depth: (1) low-permeability cap rock, (2) upper reservoir rocks consisting of sandstones, siltstones, and shales that were subject to minor alterations, and (3) lower reservoir rocks that were extensively altered. Because of the alteration, intergranular porosity and permeability are reduced with depth. permeability is enhanced by renewable fractures, i.e., fractures that can be reactivated by faulting or natural hydraulic fracturing subsequent to being sealed by mineral deposition. In the central portion of the field, temperature gradients are high near the surface and lower below 700 m. Surface gradients in this elliptically shaped region are fairly constant and define a thermal cap, which does not necessarily correspond to the lithologic cap. At the margin of the field, a narrow transition region, with a low near-surface gradient and an increasing gradient at greater depths, separates the high temperature resource from areas of normal regional gradient. Geophysical and geochemical evidence suggest that vertical convective motion in the reservoir beneath the thermal cap is confined to small units, and small-scale convection is superimposed on large-scale lateral flow of pore fluid. Interpretation of magnetic, resistivity, and gravity anomalies help to establish the relationship between the inferred heat source, the hydrothermal system, and the observed alteration patterns. A simple hydrothermal model is supported by interpreting the combined geological, geophysical, and thermal data. In the model, heat is transferred from an area of intrusion by lateral spreading of hot water in a reservoir beneath an impermeable cap rock.

Younker, L.W.; Kasameyer, P. W.; Tewhey, J. D.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Geophysical Monitoring and Reactive Transport Modeling of Ureolytically-Driven Calcium Carbonate Precipitation  

Science Conference Proceedings (OSTI)

Ureolytically-driven calcium carbonate precipitation is the basis for a promising in-situ remediation method for sequestration of divalent radionuclide and trace metal ions. It has also been proposed for use in geotechnical engineering for soil strengthening applications. Monitoring the occurrence, spatial distribution, and temporal evolution of calcium carbonate precipitation in the subsurface is critical for evaluating the performance of this technology and for developing the predictive models needed for engineering application. In this study, we conducted laboratory column experiments using natural sediment and groundwater to evaluate the utility of geophysical (complex resistivity and seismic) sensing methods, dynamic synchrotron x-ray computed tomography (micro-CT), and reactive transport modeling for tracking ureolytically-driven calcium carbonate precipitation processes under site relevant conditions. Reactive transport modeling with TOUGHREACT successfully simulated the changes of the major chemical components during urea hydrolysis. Even at the relatively low level of urea hydrolysis observed in the experiments, the simulations predicted an enhanced calcium carbonate precipitation rate that was 3-4 times greater than the baseline level. Reactive transport modeling results, geophysical monitoring data and micro-CT imaging correlated well with reaction processes validated by geochemical data. In particular, increases in ionic strength of the pore fluid during urea hydrolysis predicted by geochemical modeling were successfully captured by electrical conductivity measurements and confirmed by geochemical data. The low level of urea hydrolysis and calcium carbonate precipitation suggested by the model and geochemical data was corroborated by minor changes in seismic P-wave velocity measurements and micro-CT imaging; the latter provided direct evidence of sparsely distributed calcium carbonate precipitation. Ion exchange processes promoted through NH4+ production during urea hydrolysis were incorporated in the model and captured critical changes in the major metal species. The electrical phase increases were potentially due to ion exchange processes that modified charge structure at mineral/water interfaces. Our study revealed the potential of geophysical monitoring for geochemical changes during urea hydrolysis and the advantages of combining multiple approaches to understand complex biogeochemical processes in the subsurface.

Yuxin Wu; Jonathan B. Ajo-Franklin; Nicolas Spycher; Susan S. Hubbard; Guoxiang Zhang; Kenneth H. Williams; Joanna Taylor; Yoshiko Fujita; Robert Smith

2011-09-01T23:59:59.000Z

142

Geological, geochemical, and geophysical survey of the geothermal resources at Hot Springs Bay Valley, Akutan Island, Alaska  

DOE Green Energy (OSTI)

An extensive survey was conducted of the geothermal resource potential of Hot Springs Bay Valley on Akutan Island. A topographic base map was constructed, geologic mapping, geophysical and geochemical surveys were conducted, and the thermal waters and fumarolic gases were analyzed for major and minor element species and stable isotope composition. (ACR)

Motyka, R.J.; Wescott, E.M.; Turner, D.L.; Swanson, S.E.; Romick, J.D.; Moorman, M.A.; Poreda, R.J.; Witte, W.; Petzinger, B.; Allely, R.D.

1985-01-01T23:59:59.000Z

143

Wind Bias from Sub-optimal Estimation Due to Geophysical Modeling Error Paul E. Johnson and David G . Long  

E-Print Network (OSTI)

Wind Bias from Sub-optimal Estimation Due to Geophysical Modeling Error -Wind I Paul E. Johnson (which relates the wind to the normalized radar cross section, NRCS, of the ocean surface) is uncertainty in the NRCS for given wind conditions. When the estimated variability is in- cluded in the maximum likelihood

Long, David G.

144

Remote Sensing May Provide Unprecedented Hydrological Data http://www.agu.org/eos_elec, 1999 American Geophysical Union.  

E-Print Network (OSTI)

Remote Sensing May Provide Unprecedented Hydrological Data http://www.agu.org/eos_elec, © 1999 American Geophysical Union. Remote Sensing May Provide Unprecedented Hydrological Data -- Randal D. Koster, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Md., USA Use of remote sensing

Houser, Paul R.

145

Geophysical methods applied to detection delineation and evaluation of geothermal resources, Snowbird, Utah, August 24--28, 1975  

DOE Green Energy (OSTI)

A report is given on the geothermal workshop devoted to inventorying current knowledge, problems, controversies, and predicting future developments in the application of geophysical methods to the evaluation of geothermal resources. Separate abstracts were prepared for presentations and summaries of the group sessions. (LBS)

Not Available

1975-01-01T23:59:59.000Z

146

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Ozone Ensemble Forecast with Machine Learning Algorithms  

E-Print Network (OSTI)

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Ozone Ensemble Forecast with Machine learning algorithms to perform sequential aggregation of ozone forecasts. The latter rely on a multimodel ensemble built for ozone forecasting with the modeling system Polyphemus. The ensemble simulations

Paris-Sud XI, Université de

147

GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 22452248, AUGUST 1, 2000 Subsurface nuclear tests monitoring through the  

E-Print Network (OSTI)

nuclear tests down to 1 kiloton (kt) TNT equivalent anywhere on the planet. The IMS is based upon four waves will help check for underground, under­water and atmospheric nuclear tests. The fourth networkGEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 2245­2248, AUGUST 1, 2000 Sub­surface nuclear

Hourdin, Chez Frédéric

148

GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS, VOL. ???, XXXX, DOI:10.1029/, Effect of a metallic core on transient geomagnetic induction  

E-Print Network (OSTI)

on transient geomagnetic induction J. Vel´imsk´y,1 , C. C. Finlay2 1 Department of Geophysics, Faculty, 2:01pm D R A F T #12;X - 2 VEL´IMSK ´Y AND FINLAY: EFFECT OF CORE ON GEOMAGNETIC INDUCTION Abstract be correctly taken into account when mod- elling the geomagnetic field using modern observatory and satellite

Velímsky, Jakub

149

Geophysical Study of Basin-Range Structure Dixie Valley Region, Nevada |  

Open Energy Info (EERE)

of Basin-Range Structure Dixie Valley Region, Nevada of Basin-Range Structure Dixie Valley Region, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geophysical Study of Basin-Range Structure Dixie Valley Region, Nevada Abstract The study aims to determine the subsurface structure and origin ofa tectonically active part of the Basin and Range province, which hasstructural similarities to the ocean ridge system and to continental blockfaultstructure such_;s the Rift Valleys of East Africa. A variety oftechniques was utilized, including seismic refraction, gravity measurements,magnetic measurements, photogeologic mapping, strain analysis of existinggeodetic data, and elevation measurements on shorelines of ancient lakes.Dixie Valley contains more than 10,000 feet of Cenozoic deposits andis underlain by a complex fault trough concealed within the

150

An Integrated Geophysical Study Of The Geothermal Field Of Tule Chek, Bc,  

Open Energy Info (EERE)

Tule Chek, Bc, Tule Chek, Bc, Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Geophysical Study Of The Geothermal Field Of Tule Chek, Bc, Mexico Details Activities (0) Areas (0) Regions (0) Abstract: A method is described to determine bounds characterizing axisymmetric bodies from a set of gravity data. Bounds on the density contrast as a function of depth to the top and thickness of the anomalous source are obtained by using Parker's ideal body theory and linear programming algorithms. Such bounds are given in terms of trade-off diagrams, where regions of feasible solutions compatible with the observed data can be assured. Gravity data from the Tule Chek, B.C., Mexico, geothermal area were used to compute such trade-off diagrams. Seismic

151

An Integrated Geophysical Study Of The Northern Kenya Rift | Open Energy  

Open Energy Info (EERE)

Kenya Rift Kenya Rift Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Geophysical Study Of The Northern Kenya Rift Details Activities (0) Areas (0) Regions (0) Abstract: The Kenyan part of the East African rift is among the most studied rift zones in the world. It is characterized by: (1) a classic rift valley, (2) sheer escarpments along the faulted borders of the rift valley, (3) voluminous volcanics that flowed from faults and fissures along the rift, and (4) axial and flank volcanoes where magma flow was most intense. In northern Kenya, the rift faults formed in an area where the lithosphere was weakened and stretched by Cretaceous-Paleogene extension, and in central and southern Kenya, it formed along old zones of weakness at the

152

An Integrated Geophysical Analysis Of The Upper Crust Of The Southern Kenya  

Open Energy Info (EERE)

Upper Crust Of The Southern Kenya Upper Crust Of The Southern Kenya Rift Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Geophysical Analysis Of The Upper Crust Of The Southern Kenya Rift Details Activities (0) Areas (0) Regions (0) Abstract: Previous interpretations of seismic data collected by the Kenya Rift International Seismic Project (KRISP) experiments indicate the presence of crustal thickening within the rift valley area beneath the Kenya dome, an uplift centred on the southern part of the Kenya rift. North of the dome, these interpretations show thinning of the crust and an increase in crustal extension. To the south near the Kenya/Tanzania border, crustal thinning associated with the rift is modest. Our study was aimed at further investigating crustal structure from this dome southwards via a

153

Geophysical Setting of the Blue Mountain Geothermal Area, North-Central  

Open Energy Info (EERE)

Setting of the Blue Mountain Geothermal Area, North-Central Setting of the Blue Mountain Geothermal Area, North-Central Nevada and Its Relationship to a Crustal-Scale Fracture Associated with the Inception of the Yellowstone Hotspot Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Geophysical Setting of the Blue Mountain Geothermal Area, North-Central Nevada and Its Relationship to a Crustal-Scale Fracture Associated with the Inception of the Yellowstone Hotspot Abstract The Blue Mountain geothermal field, located about 35 km northwest of Winnemucca, Nevada, is situated along a prominent crustal-scale fracture interpreted from total intensity aeromagnetic and gravity data. Aeromagnetic data indicate that this feature is related to the intrusion of mafic dikes, similar to the Northern Nevada Rift (Zoback et al.,1994), and

154

GEOPHYSICAL INVESTIGATIONS OF THE ARCHAEOLOGICAL RESOURCES AT THE POWELL STAGE STATION  

SciTech Connect

Within the boundaries of the Idaho National Laboratory, an ongoing archaeological investigation of a late 19th century stage station was expanded with the use of Electro-Magnetic and Magnetic geophysical surveying. The station known as the Powell Stage Station was a primary transportation hub on the Snake River Plain, bridging the gap between railroad supply depots in Blackfoot, Idaho and booming mining camps throughout Central Idaho. Initial investigations have shown a strong magnetic signature from a buried road and previously unknown features that were not detected by visual surface surveys. Data gained from this project aids in federally directed cultural resource and land management and use requirements and has contributed additional information for archeological interpretation and cultural resource preservation.

Hollie K. Gilbert; Julie B. Braun; Brenda R. Pace; Gail Heath; Clark Scott

2009-04-01T23:59:59.000Z

155

SURFACE GEOPHYSICAL EXPLORATION DEVELOPING NONINVASIVE TOOLS TO MONITOR PAST LEAKS AROUND HANFORD TANK FARMS  

SciTech Connect

A characterization program has been developed at Hanford to image past leaks in and around the underground storage tank facilities. The program is based on electrical resistivity, a geophysical technique that maps the distribution of electrical properties of the subsurface. The method was shown to be immediately successful in open areas devoid of underground metallic infrastructure, due to the large contrast in material properties between the highly saline waste and the dry sandy host environment. The results in these areas, confirmed by a limited number of boreholes, demonstrate a tendency for the lateral extent of the underground waste plume to remain within the approximate footprint of the disposal facility. In infrastructure-rich areas, such as tank farms, the conventional application of electrical resistivity using small point-source surface electrodes initially presented a challenge for the resistivity method. The method was then adapted to directly use the buried infrastructure as electrodes for both transmission of electrical current and measurements of voltage. For example, steel-cased wells that surround the tanks were used as long electrodes, which helped to avoid much of the infrastructure problems. Overcoming the drawbacks of the long electrode method has been the focus of our work over the past seven years. The drawbacks include low vertical resolution and limited lateral coverage. The lateral coverage issue has been improved by supplementing the long electrodes with surface electrodes in areas devoid of infrastructure. The vertical resolution has been increased by developing borehole electrode arrays that can fit within the small-diameter drive casing of a direct push rig. The evolution of the program has led to some exceptional advances in the application of geophysical methods, including logistical deployment of the technology in hazardous areas, development of parallel processing resistivity inversion algorithms, and adapting the processing tools to accommodate electrodes of all shapes and locations. The program is accompanied by a full set of quality assurance procedures that cover the layout of sensors, measurement strategies, and software enhancements while insuring the integrity of stored data. The data have been shown to be useful in identifying previously unknown contaminant sources and defining the footprint of precipitation recharge barriers to retard the movement of existing contamination.

MYERS DA; RUCKER DF; LEVITT MT; CUBBAGE B; NOONAN GE; MCNEILL M; HENDERSON C

2011-06-17T23:59:59.000Z

156

TESTING GROUND BASED GEOPHYSICAL TECHNIQUES TO REFINE ELECTROMAGNETIC SURVEYS NORTH OF THE 300 AREA HANFORD WASHINGTON  

SciTech Connect

Airborne electromagnetic (AEM) surveys were flown during fiscal year (FY) 2008 within the 600 Area in an attempt to characterize the underlying subsurface and to aid in the closure and remediation design study goals for the 200-PO-1 Groundwater Operable Unit (OU). The rationale for using the AEM surveys was that airborne surveys can cover large areas rapidly at relatively low costs with minimal cultural impact, and observed geo-electrical anomalies could be correlated with important subsurface geologic and hydrogeologic features. Initial interpretation of the AEM surveys indicated a tenuous correlation with the underlying geology, from which several anomalous zones likely associated with channels/erosional features incised into the Ringold units were identified near the River Corridor. Preliminary modeling resulted in a slightly improved correlation but revealed that more information was required to constrain the modeling (SGW-39674, Airborne Electromagnetic Survey Report, 200-PO-1 Groundwater Operable Unit, 600 Area, Hanford Site). Both time-and frequency domain AEM surveys were collected with the densest coverage occurring adjacent to the Columbia River Corridor. Time domain surveys targeted deeper subsurface features (e.g., top-of-basalt) and were acquired using the HeliGEOTEM{reg_sign} system along north-south flight lines with a nominal 400 m (1,312 ft) spacing. The frequency domain RESOLVE system acquired electromagnetic (EM) data along tighter spaced (100 m [328 ft] and 200 m [656 ft]) north-south profiles in the eastern fifth of the 200-PO-1 Groundwater OU (immediately adjacent to the River Corridor). The overall goal of this study is to provide further quantification of the AEM survey results, using ground based geophysical methods, and to link results to the underlying geology and/or hydrogeology. Specific goals of this project are as follows: (1) Test ground based geophysical techniques for the efficacy in delineating underlying geology; (2) Use ground measurements to refine interpretations of AEM data; and (3) Improve the calibration and correlation of AEM information. The potential benefits of this project are as follows: (1) Develop a tool to map subsurface units at the Hanford Site in a rapid and cost effective manner; (2) Map groundwater pathways within the River Corridor; and (3) Aid development of the conceptual site model. If anomalies observed in the AEM data can be correlated with subsurface geology, then the rapid scanning and non-intrusive capabilities provided by the airborne surveys can be used at the Hanford Site to screen for areas that warrant further investigation.

PETERSEN SW

2010-12-02T23:59:59.000Z

157

A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone  

SciTech Connect

The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic-Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeological heterogeneity and the extent of contamination by combining information from 3D electric resistivity tomography (ERT) and/or 2D cross borehole ground penetrating radar (XBGPR) surveys, statistical information about heterogeneity and hydrologic processes, and sparse hydrologic data. Because the electrical conductivity and dielectric constant of the vadose zone (from the ERT and XBGPR measurements, respectively) can be correlated to the fluid saturation and/or contaminant concentration, the hydrologic and geophysical measurements are related.

ALUMBAUGH,DAVID L.; YEH,JIM; LABRECQUE,DOUG; GLASS,ROBERT J.; BRAINARD,JAMES; RAUTMAN,CHRIS

1999-06-15T23:59:59.000Z

158

Geologic, geophysical, and geochemical aspects of site-specific studies of the geopressured-geothermal energy resource of southern Louisiana. Final report  

DOE Green Energy (OSTI)

The report consists of four sections dealing with progress in evaluating geologic, geochemical, and geophysical aspects of geopressured-geothermal energy resources in Louisiana. Separate abstracts have been prepared for the individual sections. (ACR)

Pilger, R.H. Jr. (ed.)

1985-01-01T23:59:59.000Z

159

Institute of Geophysics and Planetary Physics (IGPP), Lawrence Livermore National Laboratory (LLNL): Quinquennial report, November 14-15, 1996  

Science Conference Proceedings (OSTI)

This Quinquennial Review Report of the Lawrence Livermore National Laboratory (LLNL) branch of the Institute for Geophysics and Planetary Physics (IGPP) provides an overview of IGPP-LLNL, its mission, and research highlights of current scientific activities. This report also presents an overview of the University Collaborative Research Program (UCRP), a summary of the UCRP Fiscal Year 1997 proposal process and the project selection list, a funding summary for 1993-1996, seminars presented, and scientific publications. 2 figs., 3 tabs.

Tweed, J.

1996-10-01T23:59:59.000Z

160

Fall 2007 American Geophysical Union Meeting Student Travel Support for Environmental Nanomaterials Session (#B35) (December 10-14, 2007)  

Science Conference Proceedings (OSTI)

The purpose of award no. DE-FG02-08ER15925 was to fund travel for students to present at the Fall 2007 American Geophysical Meeting. This was done successfully, and five students (Bin Xie, Qiaona Hu, Katie Schreiner, Daria Kibanova, and Frank-Andreas Weber) gave excellent oral and poster presentations at the meeting. Provided are the conference abstracts for their presentations.

Michael F. Hochella, Jr.

2007-10-01T23:59:59.000Z

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161

An Analysis of Wind Power Development in the Town of Hull, MA_Appendix 4_Geophysical Survey Report  

SciTech Connect

CR Environmental, Inc. (CR) was contracted by GZA GeoEnvironmental, Inc. (GZA) to perform hydrographic and geophysical surveys of an approximately 3.35 square mile area off the eastern shore of Hull, Massachusetts. Survey components included: Single-beam bathymetry; 100-kHz and 500-kHz side scan sonar; Magnetometry; and Low to mid-frequency sub-bottom profiling.

Adams, Christopher

2013-06-30T23:59:59.000Z

162

A Geological and Geophysical Study of the Geothermal Energy Potential of Pilgrim Springs, Alaska  

DOE Green Energy (OSTI)

The Pilgrim Springs geothermal area, located about 75 km north of Nome, was the subject of an intensive, reconnaissance-level geophysical and geological study during a 90-day period in the summer of 1979. The thermal springs are located in a northeast-oriented, oval area of thawed ground approximately 1.5 km{sup 2} in size, bordered on the north by the Pilgrim River. A second, much smaller, thermal anomaly was discovered about 3 km northeast of the main thawed area. Continuous permafrost in the surrounding region is on the order of 100 m thick. Present surface thermal spring discharge is {approx} 4.2 x 10{sup -3} m{sup 3} s{sup -1} (67 gallons/minute) of alkali-chloride-type water at a temperature of 81 C. The reason for its high salinity is not yet understood because of conflicting evidence for seawater vs. other possible water sources. Preliminary Na-K-Ca geothermometry suggests deep reservoir temperatures approaching 150 C, but interpretation of these results is difficult because of their dependence on an unknown water mixing history. Based on these estimates, and present surface and drill hole water temperatures, Pilgrim Springs would be classified as an intermediate-temperature, liquid-dominated geothermal system.

Turner, Donald L.; Forbes, Robert B. [eds.

1980-01-01T23:59:59.000Z

163

Identification and Characterization of Hydrogeologic Units at the Nevada Test Site Using Geophysical Logs: Examples from the Underground Test Area Project  

Science Conference Proceedings (OSTI)

The diverse and complex geology of the Nevada Test Site region makes for a challenging environment for identifying and characterizing hydrogeologic units penetrated by wells drilled for the U.S. Department of Energy, National Nuclear Security Administration, Underground Test Area (UGTA) Environmental Restoration Sub-Project. Fortunately, UGTA geoscientists have access to large and robust sets of subsurface geologic data, as well as a large historical knowledge base of subsurface geological analyses acquired mainly during the underground nuclear weapons testing program. Of particular importance to the accurate identification and characterization of hydrogeologic units in UGTA boreholes are the data and interpretation principles associated with geophysical well logs. Although most UGTA participants and stakeholders are probably familiar with drill hole data such as drill core and cuttings, they may be less familiar with the use of geophysical logs; this document is meant to serve as a primer on the use of geophysical logs in the UGTA project. Standard geophysical logging tools used in the UGTA project to identify and characterize hydrogeologic units are described, and basic interpretation principles and techniques are explained. Numerous examples of geophysical log data from a variety of hydrogeologic units encountered in UGTA wells are presented to highlight the use and value of geophysical logs in the accurate hydrogeologic characterization of UGTA wells.

Lance Prothro, Sigmund Drellack, Margaret Townsend

2009-03-25T23:59:59.000Z

164

Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, 1996 Annual Report  

Science Conference Proceedings (OSTI)

The Institute of Geophysics and Planetary Physics (IGPP) is a Multicampus Research Unit of the University of California (UC). IGPP was founded in 1946 at UC Los Angeles with a charter to further research in the earth and planetary sciences and in related fields. The Institute now has branches at UC campuses in Los Angeles, San Diego, and Riverside, and at Los Alamos and Lawrence Livermore national laboratories. The University-wide IGPP has played an important role in establishing interdisciplinary research in the earth and planetary sciences. For example, IGPP was instrumental in founding the fields of physical oceanography and space physics, which at the time fell between the cracks of established university departments. Because of its multicampus orientation, IGPP has sponsored important interinstitutional consortia in the earth and planetary sciences. Each of the five branches has a somewhat different intellectual emphasis as a result of the interplay between strengths of campus departments and Laboratory programs. The IGPP branch at Lawrence Livermore National Laboratory (LLNL) was approved by the Regents of the University of California in 1982. IGPP-LLNL emphasizes research in seismology, geochemistry, cosmochemistry, and astrophysics. It provides a venue for studying the fundamental aspects of these fields, thereby complementing LLNL programs that pursue applications of these disciplines in national security and energy research. IGPP-LLNL is directed by Charles Alcock and was originally organized into three centers: Geosciences, stressing seismology; High-Pressure Physics, stressing experiments using the two-stage light-gas gun at LLNL; and Astrophysics, stressing theoretical and computational astrophysics. In 1994, the activities of the Center for High-Pressure Physics were merged with those of the Center for Geosciences. The Center for Geosciences, headed by Frederick Ryerson, focuses on research in geophysics and geochemistry. The Astrophysics Research Center, headed by Charles Alcock, provides a home for theoretical and observational astrophysics and serves as an interface with the Physics and Space Technology Department's Laboratory for Experimental Astrophysics and with other astrophysics efforts at LLNL. The IGPP branch at LLNL (as well as the branch at Los Alamos) also facilitates scientific collaborations between researchers at the UC campuses and those at the national laboratories in areas related to earth science, planetary science, and astrophysics. It does this by sponsoring the University Collaborative Research Program (UCRP), which provides funds to UC campus scientists for joint research projects with LLNL. The goals of the UCRP are to enrich research opportunities for UC campus scientists by making available to them some of LLNL's unique facilities and expertise, and to broaden the scientific program at LLNL through collaborative or interdisciplinary work with UC campus researchers. UCRP funds (provided jointly by the Regents of the University of California and by the Director of LLNL) are awarded annually on the basis of brief proposals, which are reviewed by a committee of scientists from UC campuses, LLNL programs, and external universities and research organizations. Typical annual funding for a collaborative research project ranges from $5,000 to $25,000. Funds are used for a variety of purposes, including salary support for visiting graduate students, postdoctoral fellows, and faculty; released-time salaries for LLNL scientists; and costs for experimental facilities. Although the permanent LLNL staff assigned to IGPP is relatively small (presently about five full-time equivalents), IGPP's research centers have become vital research organizations. This growth has been possible because of IGPP support for a substantial group of resident postdoctoral fellows; because of the 20 or more UCRP projects funded each year; and because IGPP hosts a variety of visitors, guests, and faculty members (from both UC and other institutions) on sabbatical leave. To focus attention on areas of topical interest i

Ryerson, F. J., Institute of Geophysics and Planetary Physics

1998-03-23T23:59:59.000Z

165

Tectonic controls on magmatism in The Geysers--Clear Lake region: Evidence from new geophysical models  

DOE Green Energy (OSTI)

In order to study magmatism and geothermal systems in the Geysers-Clear Lake region, the authors developed a detailed three-dimensional tomographic velocity model based on local earthquakes. This high-resolution model resolves the velocity structure of the crust in the region to depths of approximately 12 km. The most significant velocity contrasts in The Geysers-Clear Lake region occur in the steam production area, where high velocities are associated with a Quaternary granite pluton, and in the Mount Hannah region, where low velocities occur in a 5-km-thick section of Mesozoic argillites. In addition, a more regional tomographic model was developed using traveltimes from earthquakes covering most of northern California. This regional model sampled the whole crust, but at a lower resolution than the local model. No large silicic magma chamber is noted in either the local or regional tomographic models. A three-dimensional gravity model also has ben developed in the area of the tomographic imaging. The gravity model demonstrates that all density contrasts can be accounted for in the upper 5--7 km of the crust. Two-dimensional magnetotelluric models of data from a regional east-west profile indicate high resistivities associated with the granitic pluton in The Geysers production area and low resistivities in the low-velocity section of Mesozoic argillites near Mount Hannah. No indication of midcrustal magma bodies is present in the magnetotelluric data. The geophysical models, seismicity patterns, distribution of volcanic vents, heat flow, and other data indicate that small, young intrusive bodies that were injected along a northeast trend from The Geysers to Clear Lake probably control the thermal regime.

Stanley, W.D.; Benz, H.M.; Villasenor, A.; Rodriguez, B.D. [Geological Survey, Denver, CO (United States). Denver Federal Center] [Geological Survey, Denver, CO (United States). Denver Federal Center; Walters, M.A. [CalEnergy Corp., Ridgecrest, CA (United States)] [CalEnergy Corp., Ridgecrest, CA (United States)

1998-09-01T23:59:59.000Z

166

The Cove Fort-Sulphurdale KGRA, a geologic and geophysical case study  

DOE Green Energy (OSTI)

Geological, geochemical and geophysical data are presented for one of the major geothermal systems in the western United States. Regional data indicate major tectonic structures which are still active and provide the conduits for the geothermal system. Detailed geologic mapping has defined major glide blocks of Tertiary volcanics which moved down from the Tushar Mountains and locally act as a leaky cap to portions of the presently known geothermal system. Mapping and geochemical studies indicate three periods of mineralization have affected the area, two of which are unrelated to the present geothermal activity. The geologic relationships demonstrate that the major structures have been opened repeatedly since the Tertiary. Gravity and magnetic data are useful in defining major structures beneath alluvium and basalt cover, and indicate the importance of the Cove Fort-Beaver graben and the Cove Creek fault in localizing the geothermal reservoir. These structures and a high level of microearthquake activity also suggest other target areas within the larger thermal anomaly. Electrical resistivity surveys and thermal gradient holes both contribute to the delineation of the known reservoir. Deep exploration wells which test the reservoir recorded maximum temperatures of 178 C and almost isothermal behavior beginning at 700 to 1000 m and continuing to a depth of 1800 m. Costly drilling, high corrosion rates and low reservoir pressure coupled with the relatively low reservoir temperatures have led to the conclusion that the reservoir is not economic for electric power production at present. Plans are underway to utilize the moderate-temperature fluids for agribusiness, and exploration continues for a deep high-temperature reservoir.

Ross, Howard P.; Moore, Joseph N.; Christensen, Odin D.

1982-09-01T23:59:59.000Z

167

AUTOMATED LEAK DETECTION OF BURIED TANKS USING GEOPHYSICAL METHODS AT THE HANFORD NUCLEAR SITE  

SciTech Connect

At the Hanford Nuclear Site in Washington State, the Department of Energy oversees the containment, treatment, and retrieval of liquid high-level radioactive waste. Much of the waste is stored in single-shelled tanks (SSTs) built between 1943 and 1964. Currently, the waste is being retrieved from the SSTs and transferred into newer double-shelled tanks (DSTs) for temporary storage before final treatment. Monitoring the tanks during the retrieval process is critical to identifying leaks. An electrically-based geophysics monitoring program for leak detection and monitoring (LDM) has been successfully deployed on several SSTs at the Hanford site since 2004. The monitoring program takes advantage of changes in contact resistance that will occur when conductive tank liquid leaks into the soil. During monitoring, electrical current is transmitted on a number of different electrode types (e.g., steel cased wells and surface electrodes) while voltages are measured on all other electrodes, including the tanks. Data acquisition hardware and software allow for continuous real-time monitoring of the received voltages and the leak assessment is conducted through a time-series data analysis. The specific hardware and software combination creates a highly sensitive method of leak detection, complementing existing drywell logging as a means to detect and quantify leaks. Working in an industrial environment such as the Hanford site presents many challenges for electrical monitoring: cathodic protection, grounded electrical infrastructure, lightning strikes, diurnal and seasonal temperature trends, and precipitation, all of which create a complex environment for leak detection. In this discussion we present examples of challenges and solutions to working in the tank farms of the Hanford site.

CALENDINE S; SCHOFIELD JS; LEVITT MT; FINK JB; RUCKER DF

2011-03-30T23:59:59.000Z

168

Improved Time to Publication in Journal of Geophysical Research-Atmospheres  

Science Conference Proceedings (OSTI)

Timely publication of manuscripts is important to authors and readers. AGU has significantly accelerated both the review and production processes for the Journal of Geophysical Research-Atmospheres (JGR-Atmospheres). Via a number of mechanisms (e.g., shortening the time allotted for reviewer selection, manuscript reviews, and revisions), the mean time to first decision has been decreased from 98 days in 2007 to 50 days in 2011, and the mean time to final decision has been decreased from 132 days in 2007 to 71 days in 2011. By implementing a new content management system, adjusting the workflow for improved efficiency, requesting authors to proofread their manuscripts quicker, and improving monitoring and follow-up to author and vendor queries, the mean production time from manuscript acceptance to publication has been decreased from 128 days in 2010 to only 56 days in 2012. Thus, in the past few years the mean time to publication of JGRAtmospheres has been cut in half. These milestones have been achieved with no loss of quality of presentation or content. In addition, online posting of "papers in press" on JGR-Atmospheres home page typically occurs within a few days after acceptance. JGR-Atmospheres editors thank manuscript reviewers, authors, and AGU staff who have greatly contributed to the more timely review and publication processes. This information will be updated periodically on the JGR-Atmospheres home page. A chart showing the average time from acceptance to publication for all of AGUs journals is available at http://www.agu.org/pubs/pdf/31May2012_Timeliness_Chart.pdf.

de Gouw, Joost A.; Ghan, Steven J.; Pryor, Sara; Rudich, Yinon; Zhang, Renyi

2012-07-03T23:59:59.000Z

169

Geophysical Monitoring of Foam used to Deliver Remediation Treatments within the Vadose Zone  

Science Conference Proceedings (OSTI)

Foam is a promising vehicle for delivering amendments into the vadose zone for in situ remediation; it is an approach being considered for in situ treatment and stabilization of metals and radionuclides located within the deep vadose zone of the Department of Energy (DOE) Hanford site, WA. A central aspect of evaluating the effectiveness of this approach is the ability to monitor foam distribution, its transformation, and the reactions that it induces in the subsurface, ideally in a non-invasive manner. In this study, we performed laboratory experiments to evaluate the potential of geophysical methods (complex resistivity and time domain reflectometry, TDR) as tools for monitoring foam assisted amendment delivery in the deep vadose zone. Our results indicated great sensitivity of electrical methods to foam transportation and evolution in unsaturated porous media that were related to foam bubble coalescence and drainage processes. Specifically, we observed (1) a decrease of electrical resistivity (increase of electrical conductivity) by over an order of magnitude in both silica sand and natural sediment matrices during foam transportation; (2) an increase of resistivity (decrease of conductivity) by over two fold during foam coalescence and drainage; (3) a distinct phase and imaginary conductivity signature related to the evolution of water films on sediment grains during foam injection and evolution processes. To assist with the interpretation of these data, TDR measurements were used to monitor moisture content, which provided complementary information about foam distribution and drainage. Our results clearly demonstrated the sensitivity of electrical and TDR signals to foam transportation and evolution in unsaturated porous media and suggested the potential of these methods for monitoring the response of a system to foam based remediation treatments at field scales.

Wu, Yuxin; Hubbard, Susan; Wellman, Dawn M.

2012-11-01T23:59:59.000Z

170

Precambrian basement geology of the Permian basin region of west Texas and Eastern New Mexico: A geophysical perspective  

SciTech Connect

Because most of the Permian basin region of west Texas and southern New Mexico is covered by Phanerozoic rocks, other means must be found to examine the Precambrian upper crustal geology of the region. We have combined geologic information on the Precambrian from outcrops and wells with geophysical information from gravity and magnetic surveys in an integrated analysis of the history and structure of basement rocks in the region. Geophysical anomalies can be related to six Precambrian events: formation of the Early Proterozoic outer tectonic belt, igneous activity in the southern Granite-Rhyolite province, an episode of pre-Grenville extension, the Grenville orogeny, rifting to form the Delaware aulacogen, and Eocambrian rifting to form the early Paleozoic continental margin. Two geophysical features were studied in detail: the Abilene gravity minimum and the Central Basin platform gravity high. The Abilene gravity minimum is shown to extend from the Delaware basin across north-central Texas and is interpreted to be caused by a granitic batholith similar in size to the Sierra Nevada batholith in California and Nevada. This batholith appears to be related to formation of the southern Granite- Rhyolite province, possibly as a continental margin arc batholith. Because of this interpretation, we have located the Grenville tectonic front southward from its commonly quoted position, closer to the Llano uplift. Middle Proterozoic mafic intrusions are found to core the Central Basin platform and the Roosevelt uplift. These intrusions formed at about 1.1 Ga and are related in time to both the Mid-Continent rift system and the Grenville orogeny in Texas. Precambrian basement structures and changes in lithology have influenced the structure and stratigraphy in the overlying Permian basin, and thus have potential exploration significance.

Adams, D.C.; Keller, G.R. [Univ. of Texas, El Paso, TX (United States)

1996-03-01T23:59:59.000Z

171

Summary Report of Geophysical Logging For The Seismic Boreholes Project at the Hanford Site Waste Treatment Plant.  

SciTech Connect

During the period of June through October 2006, three deep boreholes and one corehole were drilled beneath the site of the Waste Treatment Plant (WTP) at the U.S. Department of Energy (DOE) Hanford Site near Richland, Washington. The boreholes were drilled to provide information on ground-motion attenuation in the basalt and interbedded sediments underlying the WTP site. This report describes the geophysical logging of the deep boreholes that was conducted in support of the Seismic Boreholes Project, defined below. The detailed drilling and geological descriptions of the boreholes and seismic data collected and analysis of that data are reported elsewhere.

Gardner, Martin G.; Price, Randall K.

2007-02-01T23:59:59.000Z

172

Report of the geophysical measurements in geothermal wells workshop, Airport Marina Hotel, Albuquerque, New Mexico, September 17--19, 1975  

SciTech Connect

This report presents results of a Workshop on Geophysical Measurements in Geothermal Wells, hosted in Albuquerque, September 17-19, by Sandia Laboratories and jointly sponsored by the United States Geological Survey and the Energy Research and Development Administration. During the workshop, tutorial papers dealing with the geothermal resource, geothermal logging, and high temperature technology were followed by working panel sessions. Three panels deliberated, respectively, well and reservoir parameters, log interpretation, and high temperature technology. In a final session, the reports of the panels were heard and discussed by the full workshop. A summary of the workshop conclusions and recommendations, as well as the complete panel statements, are presented. (auth)

Baker, L.E.; Baker, R.P.; Hughen, R.L.

1975-12-01T23:59:59.000Z

173

Geophysical investigations of the Baltazor Hot Springs known geothermal resource area and the Painted Hills thermal area, Humboldt County, Nevada  

DOE Green Energy (OSTI)

Geophysical investigations of the Baltazor Hot Springs KGRA and the Painted Hills thermal area, Humboldt Co., Nevada are described. The study includes a gravity survey of 284 stations covering 750 sq km, numerical modeling and interpretation of five detailed gravity profiles, numerical modeling and inerpretation of 21.8 line-km of dipole-dipole electrical resistivity data along four profiles, and a qualitative inerpretation of 38 line-km of self-potential data along eight profiles. The primary purpose of the investigation is to try to determine the nature of the geologic controls of the thermal anomalies at the two areas.

Edquist, R.K.

1981-02-01T23:59:59.000Z

174

New Geophysical Technique for Mineral Exploration and Mineral Discrimination Based on Electromagnetic Methods  

DOE Green Energy (OSTI)

The research during the first year of the project was focused on developing the foundations of a new geophysical technique for mineral exploration and mineral discrimination, based on electromagnetic (EM) methods. The proposed new technique is based on examining the spectral induced polarization effects in electromagnetic data using modern distributed acquisition systems and advanced methods of 3-D inversion. The analysis of IP phenomena is usually based on models with frequency dependent complex conductivity distribution. One of the most popular is the Cole-Cole relaxation model. In this progress report we have constructed and analyzed a different physical and mathematical model of the IP effect based on the effective-medium theory. We have developed a rigorous mathematical model of multi-phase conductive media, which can provide a quantitative tool for evaluation of the type of mineralization, using the conductivity relaxation model parameters. The parameters of the new conductivity relaxation model can be used for discrimination of the different types of rock formations, which is an important goal in mineral exploration. The solution of this problem requires development of an effective numerical method for EM forward modeling in 3-D inhomogeneous media. During the first year of the project we have developed a prototype 3-D IP modeling algorithm using the integral equation (IP) method. Our IE forward modeling code INTEM3DIP is based on the contraction IE method, which improves the convergence rate of the iterative solvers. This code can handle various types of sources and receivers to compute the effect of a complex resistivity model. We have tested the working version of the INTEM3DIP code for computer simulation of the IP data for several models including a southwest US porphyry model and a Kambalda-style nickel sulfide deposit. The numerical modeling study clearly demonstrates how the various complex resistivity models manifest differently in the observed EM data. These modeling studies lay a background for future development of the IP inversion method, directed at determining the electrical conductivity and the intrinsic chargeability distributions, as well as the other parameters of the relaxation model simultaneously. The new technology envisioned in this proposal, will be used for the discrimination of different rocks, and in this way will provide an ability to distinguish between uneconomic mineral deposits and the location of zones of economic mineralization and geothermal resources.

Michael S. Zhdanov

2005-03-09T23:59:59.000Z

175

New Geophysical Technique for Mineral Exploration and Mineral Discrimination Based on Electromagnetic Methods  

DOE Green Energy (OSTI)

The research during the first two years of the project was focused on developing the foundations of a new geophysical technique for mineral exploration and mineral discrimination, based on electromagnetic (EM) methods. The developed new technique is based on examining the spectral induced polarization effects in electromagnetic data using effective-medium theory and advanced methods of 3-D modeling and inversion. The analysis of IP phenomena is usually based on models with frequency dependent complex conductivity distribution. In this project, we have developed a rigorous physical/mathematical model of heterogeneous conductive media based on the effective-medium approach. The new generalized effective-medium theory of IP effect (GEMTIP) provides a unified mathematical method to study heterogeneity, multi-phase structure, and polarizability of rocks. The geoelectrical parameters of a new composite conductivity model are determined by the intrinsic petrophysical and geometrical characteristics of composite media: mineralization and/or fluid content of rocks, matrix composition, porosity, anisotropy, and polarizability of formations. The new GEMTIP model of multi-phase conductive media provides a quantitative tool for evaluation of the type of mineralization, and the volume content of different minerals using electromagnetic data. We have developed a 3-D EM-IP modeling algorithm using the integral equation (IE) method. Our IE forward modeling software is based on the contraction IE method, which improves the convergence rate of the iterative solvers. This code can handle various types of sources and receivers to compute the effect of a complex resistivity model. We have demonstrated that the generalized effective-medium theory of induced polarization (GEMTIP) in combination with the IE forward modeling method can be used for rock-scale forward modeling from grain-scale parameters. The numerical modeling study clearly demonstrates how the various complex resistivity models manifest differently in the observed EM data. These modeling studies lay a background for future development of the IP inversion method, directed at determining the electrical conductivity and the intrinsic chargeability distributions, as well as the other parameters of the relaxation model simultaneously. The new technology introduced in this project can be used for the discrimination between uneconomic mineral deposits and the location of zones of economic mineralization and geothermal resources.

Michael S. Zhdanov

2009-03-09T23:59:59.000Z

176

Integration & Co-development of a Geophysical CO2 Monitoring Suite  

SciTech Connect

Carbon capture and sequestration (CCS) has emerged as a key technology for dramatic short-term reduction in greenhouse gas emissions in particular from large stationary. A key challenge in this arena is the monitoring and verification (M&V) of CO2 plumes in the deep subsurface. Towards that end, we have developed a tool that can simultaneously invert multiple sub-surface data sets to constrain the location, geometry, and saturation of subsurface CO2 plumes. We have focused on a suite of unconventional geophysical approaches that measure changes in electrical properties (electrical resistance tomography, electromagnetic induction tomography) and bulk crustal deformation (til-meters). We had also used constraints of the geology as rendered in a shared earth model (ShEM) and of the injection (e.g., total injected CO{sub 2}). We describe a stochastic inversion method for mapping subsurface regions where CO{sub 2} saturation is changing. The technique combines prior information with measurements of injected CO{sub 2} volume, reservoir deformation and electrical resistivity. Bayesian inference and a Metropolis simulation algorithm form the basis for this approach. The method can (a) jointly reconstruct disparate data types such as surface or subsurface tilt, electrical resistivity, and injected CO{sub 2} volume measurements, (b) provide quantitative measures of the result uncertainty, (c) identify competing models when the available data are insufficient to definitively identify a single optimal model and (d) rank the alternative models based on how well they fit available data. We present results from general simulations of a hypothetical case derived from a real site. We also apply the technique to a field in Wyoming, where measurements collected during CO{sub 2} injection for enhanced oil recovery serve to illustrate the method's performance. The stochastic inversions provide estimates of the most probable location, shape, volume of the plume and most likely CO{sub 2} saturation. The results suggest that the method can reconstruct data with poor signal to noise ratio and use hard constraints available from many sites and applications. External interest in the approach and method is high, and already commercial and DOE entities have requested technical work using the newly developed methodology for CO{sub 2} monitoring.

Friedmann, S J

2007-07-24T23:59:59.000Z

177

Localization of shallow gas deposits and uncontrolled gas flows in young and unconsolidated sediments by geophysical methods  

SciTech Connect

The great mass of Neogene sediments in the Hungarian basin, where several hydrocarbon accumulations are known, is affected by Pliocene strike-slip movements, resulting in many [open quotes]flower structures.[close quotes] The gas may migrate from the reservoirs upward to the surface along the faults. Thus, shallow gas deposits can be located in the young, unconsolidated sands. There are also several shallow gas deposits derived from uncontrolled gas flows. In Hungary, the shallow gas reservoirs, which are small but increasingly important, have not yet been explored properly. However, the depleting gas may pollute the water in the soil as well as cause explosions. Our purpose is to develop inexpensive, complete, and highly sophisticated field- and data-processing techniques and an integrated complex of geophysical methods in order to define the limits of shallow gas deposits. To avoid anomalous behavior on seismic sections of the depleting gas, we started from uncontrolled gas flows which require special velocity and amplitude vs. offset analyses. In addition, natural and controlled source electromagnetic/electric surveys with various parameters were applied. An industrial-scale seismic section over an uncontrolled gas flow, special sections over flower structures and geoelectric sections, and a magnetic map are presented. The integrated complex of geophysical methods outlined above is being developed in order to establish the conditions for the exploration of gas reservoirs which have been used close to their locality and which could be recovered inexpensively.

Csoergei, J.; Kummer, I.; Papa, A.; Sipos, J.; Solyom, I.; Takacs, E.; Timar, Z. (Eotvos Lorand Geophysical Institute of Hungary, Budapest (Hungary)); Keresztes, T. (MOL RT, Budapest (Hungary))

1993-09-01T23:59:59.000Z

178

Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California  

DOE Green Energy (OSTI)

The Coso Geothermal Exploration Hole number one (CGEH-1) was drilled in the Coso Hot Springs KGRA, California, from September 2 to December 2, 1977. Chip samples were collected at ten foot intervals and extensive geophysical logging surveys were conducted to document the geologic character of the geothermal system as penetrated by CGEH-1. The major rock units encountered include a mafic metamorphic sequence and a leucogranite which intruded the metamorphic rocks. Only weak hydrothermal alteration was noted in these rocks. Drillhole surveys and drilling rate data indicate that the geothermal system is structurally controlled and that the drillhole itself was strongly influenced by structural zones. Water chemistry indicates that this geothermal resource is a hot-water rather than a vapor-dominated system. Several geophysical logs were employed to characcterize the drillhole geology. The natural gamma and neutron porosity logs indicate gross rock type and the accoustic logs indicate fractured rock and potentially permeable zones. A series of temperature logs run as a function of time during and after the completion of drilling were most useful in delineating the zones of maximum heat flux. Convective heat flow and temperatures greater than 350/sup 0/F appear to occur only along an open fracture system encountered between depths of 1850 and 2775 feet. Temperature logs indicate a negative thermal gradient below 3000 feet.

Galbraith, R.M.

1978-05-01T23:59:59.000Z

179

Feisal Dirgantara is currently a graduate student (MSc) at the Colorado School of Mines in the Geophysics Department. He is coming from Indonesia. He joined Mines since Fall 2009  

E-Print Network (OSTI)

in the Geophysics Department. He is coming from Indonesia. He joined Mines since Fall 2009 and is advised by Michael. Dirgantara earned his B.Sc (2008) in Geophysics from Gadjah Mada University, Indonesia. During his Indonesian mining company. Second was at Volcanological Survey of Indonesia where he did his undergraduate

180

GEOPHYSICS, VOL. 70, NO. 6 (NOVEMBER-DECEMBER 2005); P. 63ND89ND, 6 FIGS. 10.1190/1.2133785  

E-Print Network (OSTI)

in oil and gas exploration. Despite being eclipsed by seismology, it has continued to be an important and sometimes crucial constraint in a number of exploration areas. In oil exploration the gravity method (Appendix A). The first geophysical oil and gas discovery, the Nash dome in coastal Texas, was the result

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181

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103,NO. B12,PAGES 30,245-30,267,DECEMBER 10, 1998 Okinawa trough backarc basin'  

E-Print Network (OSTI)

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103,NO. B12,PAGES 30,245-30,267,DECEMBER 10, 1998 Okinawa-KunHsu3,NicolasThareau·, Jean-PierreLeFormal·, Char-ShineLiu3,andACT party4 Abstract. TheOkinawaTrough,lyingbetweenJapanandTaiwan,isabackarcbasinformedby extensionwithinthecontinentallithospherebehindtheRyukyutrench-arcsystem.Stress directionsassociatedwiththetwolastextensionalphasesin thesouthwesternOkinawa

Demouchy, Sylvie

182

809New Zealand Journal of Geology & Geophysics, 2004, Vol. 47: 809821 00288306/04/47040809 The Royal Society of New Zealand 2004  

E-Print Network (OSTI)

809New Zealand Journal of Geology & Geophysics, 2004, Vol. 47: 809­821 0028­8306/04/4704­0809 © The Royal Society of New Zealand 2004 Stable isotope values in modern bryozoan carbonate from New Zealand Department of Geology Dickinson College P.O. Box 1773 Carlisle, PA 17013, USA WILLIAM P. PATTERSON Department

Patterson, William P.

183

GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 2245-2248, AUGUST 1, 2000 Sub-surface nuclear tests monitoring through the  

E-Print Network (OSTI)

) which should detect nuclear tests down to 1 kiloton (kt) TNT equivalent anywhere on the planet. The IMS), hydroacoustic and infrasound waves will help check for underground, under-water and atmospheric nuclear testsGEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 2245-2248, AUGUST 1, 2000 Sub-surface nuclear

Hourdin, Chez Frédéric

184

GEOPHYSICS, VOL. 60, NO. 4 (JULY-AUGUST 1995); P. 998-1006, 6 FIGS., 2 TABLES. The effect of steam quality on the electrical behavior  

E-Print Network (OSTI)

GEOPHYSICS, VOL. 60, NO. 4 (JULY-AUGUST 1995); P. 998-1006, 6 FIGS., 2 TABLES. The effect of steam quality on the electrical behavior of steam-flooded sands: A laboratory study David B. Butler* and Rosemary J. Knight* ABSTRACT Laboratory measurements of the effects of steam injection on the electrical

Knight, Rosemary

185

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 101, NO. B5, PAGES 11,655-11,663, MAY 10, 1996 Geomagnetic field inclinations for the past 400 kyr from the  

E-Print Network (OSTI)

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 101, NO. B5, PAGES 11,655-11,663, MAY 10, 1996 Geomagnetic Institute of Technology, Pasadena Abstract. A volcanic record of geomagnetic field inclination for the past of the geomagnetic field. The secular variation has a mean of 30.9° (95= 2.27°), which is significantly shallower

Bruck, Jehoshua (Shuki)

186

Geophysical survey, Paso Robles geothermal area, California, part of the resource assessment of low- and moderate-temperature geothermal resource areas in California  

DOE Green Energy (OSTI)

Some general background information concerning the geology and geothermal occurrences in the Southern Coast Ranges is included, as well as the more detailed information dealing with the Paso Robles area proper. Results for two geophysical methods that have been used in the area: the ground magnetic and gravity surveys, are discussed and interpreted.

Chapman, R.H.; Chase, G.W.; Youngs, L.G.

1980-11-10T23:59:59.000Z

187

Geophysical variables and behavior: LIII. Epidemiological considerations for incidence of cancer and depression in areas of frequent UFO reports  

SciTech Connect

Luminous phenomena and anomalous physical forces have been hypothesized to be generated by focal tectonic strain fields that precede earthquakes. If these geophysical processes exist, then their spatial and temporal density should be greatest during periods of protracted, localized UFO reports; they might be used as dosimetric indicators. Contemporary epidemiological data concerning the health risks of power frequency electromagnetic fields and radon gas levels (expected correlates of certain tectonic strain fields), suggest that increased incidence (odds ratios greater 1:3) of brain tumors and leukemia should be evident within flap areas. In addition the frequency of variants of temporal lobe lability, psychological depression and posttraumatic stress should be significantly elevated. UFO field investigators, because they have repeated, intermittent close proximity to these fields, are considered to be a particularly high risk population for these disorders. 22 references.

Persinger, M.A.

1988-12-01T23:59:59.000Z

188

Applications of Geophysical and Geological Techniques to Identify Areas for Detailed Exploration in Black Mesa Basin, Arizona  

SciTech Connect

A recent report submitted to the U.S. Department of Energy (DOE) (NIPER/BDM-0226) discussed in considerable detail, the geology, structure, tectonics, and history of oil production activities in the Black Mesa basin in Arizona. As part of the final phase of wrapping up research in the Black Mesa basin, the results of a few additional geophysical studies conducted on structure, stratigraphy, petrophysical analysis, and oil and gas occurrences in the basin are presented here. A second objective of this study is to determine the effectiveness of relatively inexpensive, noninvasive techniques like gravity or magnetic in obtaining information on structure and tectonics in sufficient detail for hydrocarbon exploration, particularly by using the higher resolution satellite data now becoming available to the industry.

George, S.; Reeves, T.K.; Sharma, Bijon; Szpakiewicz, M.

1999-04-29T23:59:59.000Z

189

Comments on the geophysics paper -- Multiparameter l(1) norm waveform fitting: Interpretation of Gulf of Mexico reflection seismograms: by H. Djikpesse and A. Tarantola  

SciTech Connect

In their recent paper, Djikpesse and Tarantola (Geophysics 65 (4) pp. 1023-1035, hereinafter D and T) raise a central question about geophysical inversion: how accurately must the physics of seismic waves in the Earth be modeled in order that inversion succeed? Two general criteria for successful inversion appear in D and T's discussion: fit of predicted to observed data, and prediction of Earth structure. The hypothesis underlying inversion is that these criteria are unextricably linked, so that data fit should lead to accurate inference of subsurface features. The authors have also worked on the data discussed in D and T, using different modeling choices and inversion algorithms but also achieving quite successful inversions, in both senses. They feel that a brief comparison of methods and results might highlight the subtle relation between accuracy in modeling and success in inversion as well as raising questions about the appropriateness of D and T's modeling and inversion choices.

Minkoff, S.E.; Symes, W.W.

2000-01-03T23:59:59.000Z

190

Water information bulletin No. 30: geothermal investigations in Idaho. Part 11. Geological, hydrological, geochemical and geophysical investigations of the Nampa-Caldwell and adjacent areas, southwestern Idaho  

DOE Green Energy (OSTI)

The area under study included approximately 925 sq km (357 sq mi) of the Nampa-Caldwell portion of Canyon County, an area within the central portion of the western Snake River Plain immediately west of Boise, Idaho. Geologic mapping, hydrologic, geochemical, geophysical, including detailed gravity and aeromagnetic surveys, were run to acquire needed data. In addition, existing magnetotelluric and reflection seismic data were purchased and reinterpreted in light of newly acquired data.

Mitchell, J.C. (ed.)

1981-12-01T23:59:59.000Z

191

Geothermal resources of the western arm of the Black Rock Desert, northwestern Nevada. Part I. Geology and geophysics  

DOE Green Energy (OSTI)

Studies of the geothermal potential of the western arm of the Black Rock Desert in northwestern Nevada included a compilation of existing geologic data on a detailed map, a temperature survey at 1-meter depth, a thermal-scanner survey, and gravity and seismic surveys to determine basin geometry. The temperature survey showed the effects of heating at shallow depths due to rising geothermal fluids near the known hot spring areas. Lower temperatures were noted in areas of probable near-surface ground-water movement. The thermal-scanner survey verified the known geothermal areas and showed relatively high-temperature areas of standing water and ground-water discharge. The upland areas of the desert were found to be distinctly warmer than the playa area, probably due to the low thermal diffusivity of upland areas caused by low moisture content. Surface geophysical surveys indicated that the maximum thickness of valley-fill deposits in the desert is about 3200 meters. Gravity data further showed that changes in the trend of the desert axis occurred near thermal areas. 53 refs., 8 figs., 3 tabs.

Schaefer, D.H.; Welch, A.H.; Maurer, D.K.

1983-01-01T23:59:59.000Z

192

Airborne Geophysical Surveys in the North-Central Region of Goias (Brazil): Implications for Radiometric Characterization of Subtropical Soils  

E-Print Network (OSTI)

In this work we present progress obtained in analysis airborne geophysical survey data for the north-central region of the state of Goias (Brazil). The results obtained indicate that most of the subtropical soil types are characterized by Uranium contents of greater than one parts per million (ppm). Only ultisol and oxisol soils are found to have Uranium contents lower than one ppm. Thorium and Potassium abundances also display trends similar to those of Uranium. The K/U ratios fall in the expected range of values for common soils while the Th/U ratios are higher than normal. This latter observation may indicate a characteristic feature of subtropical soils. Alternatively it may be considered as indicative of disequilibrium conditions in radioactive series and consequent underestimation of Uranium in soil layers of the study area. In this context we point out the possibility of using results of radiometric surveys as a convenient complementary tool in identifying geochemical zoning of soils in subtropical env...

Guimares, S N P; Justo, J S

2011-01-01T23:59:59.000Z

193

Solid State Electron Transfer via Bacterial Nanowires: Contributions Toward a Mechanistic Understanding of Geophysical Response of Biostimulated Subsurface  

SciTech Connect

The degradation of organic matter by microorganisms provides a source of electrical potential or so-called 'self potential' (SP) that can be measured by using a voltmeter. During this process electrons are being produced as a waste-product and bacterial cells have to dispose of these to allow for the complete biodegradation of organic matter. Especially in anaerobic microbial communities, exo-cellular electron transfer is the most important driving force behind this process and organisms have developed different, but also similar, ways to transfer electrons to other microorganisms. Recently, it has been postulated that direct electron transfer from cell-to-cell is actually done by 'hard-wired' microorganisms. This shuttling of electrons is most likely done by certain c-type cytochromes that form the functional part of electrically conductive nanowires. In this study we investigated if nanowires can explain the geoelectrical (self potential and spectral induced polarization) signals observed at some biostimulated environments such as DOE sites. The objectives of our project are to: (1) investigate any temporal changes in the geophysical signatures (Self Potential (SP) and Induced Polarization (IP)) associated with nanowires of the bacterium Shewanella oneidensis MR-1, wild type and mtrc/omcA deletion mutant, (2) demonstrate that mutant strains of bacteria that produce nonconductive nanowires do not contribute to geoelectrical responses. We accomplished the following: (1) Provided training to students and a postdoctoral fellow that worked on the project, (2) Conducted several SP & IP measurements correlating the distribution of nanowires and SIP/SP signals in partial fulfillment of object No. 1 and 2. On the following we will report and discuss the results of our last experiment with some emphasis on the source mechanisms of both SP and IP associated with Shewanella oneidensis MR-1, wild type in sand columns.

Estella Atekwana

2012-05-08T23:59:59.000Z

194

DETECTION OF HISTORICAL PIPELINE LEAK PLUMES USING NON-INTRUSIVE SURFACE-BASED GEOPHYSICAL TECHNIQUES AT THE HANFORD NUCLEAR SITE WASHINGTON USA  

Science Conference Proceedings (OSTI)

Historical records from the Department of Energy Hanford Nuclear Reservation (in eastern WA) indicate that ruptures in buried waste transfer pipelines were common between the 1940s and 1980s, which resulted in unplanned releases (UPRs) of tank: waste at numerous locations. A number of methods are commercially available for the detection of active or recent leaks, however, there are no methods available for the detection of leaks that occurred many years ago. Over the decades, leaks from the Hanford pipelines were detected by visual observation of fluid on the surface, mass balance calculations (where flow volumes were monitored), and incidental encounters with waste during excavation or drilling. Since these detection methods for historic leaks are so limited in resolution and effectiveness, it is likely that a significant number of pipeline leaks have not been detected. Therefore, a technology was needed to detect the specific location of unknown pipeline leaks so that characterization technologies can be used to identify any risks to groundwater caused by waste released into the vadose zone. A proof-of-concept electromagnetic geophysical survey was conducted at an UPR in order to image a historical leak from a waste transfer pipeline. The survey was designed to test an innovative electromagnetic geophysical technique that could be used to rapidly map the extent of historical leaks from pipelines within the Hanford Site complex. This proof-of-concept test included comprehensive testing and analysis of the transient electromagnetic method (TEM) and made use of supporting and confirmatory geophysical methods including ground penetrating radar, magnetics, and electrical resistivity characterization (ERC). The results for this initial proof-of-concept test were successful and greatly exceeded the expectations of the project team by providing excellent discrimination of soils contaminated with leaked waste despite the interference from an electrically conductive pipe.

SKORSKA MB; FINK JB; RUCKER DF; LEVITT MT

2010-12-02T23:59:59.000Z

195

Beowawe geothermal-resource assessment. Final report. Shallow-hole temperature survey geophysics and deep test hole Collins 76-17  

DOE Green Energy (OSTI)

Geothermal resource investigation field efforts in the Beowawe Geysers Area, Eureka County, Nevada are described. The objectives included acquisition of geotechnical data for understanding the nature and extent of the geothermal resource boundaries south of the known resource area. Fourteen shallow (<500 feet) temperature-gradient holes plus geophysics were used to select the site for a deep exploratory well, the Collins 76-17, which was completed to a total depth of 9005 feet. Maximum downhole recorded temperature was 311/sup 0/F, but no flow could be induced.

Jones, N.O.

1983-03-01T23:59:59.000Z

196

Geophysical survey work plan for White Wing Scrap Yard (Waste Area Grouping 11) at Oak Ridge National Laboratory, Oak Ridge, Tennessee  

SciTech Connect

The White Wing Scrap Yard, located on the U.S. Department of Energy`s Oak Ridge Reservation, served as an aboveground storage and disposal area for contaminated debris and scrap from the Oak Ridge K-25 Site, the Oak Ridge Y-12 Plant, and the Oak Ridge National laboratory. The site is believed to have been active from the early 1950s until the mid-1960s. A variety of materials were disposed of at the site, including contaminated steel tanks and vehicles. As an interim corrective action, a surface debris removal effort was initiated in November 1993 to reduce the potential threat to human health and the environment from the radionuclide-contaminated debris. Following this removal effort, a geophysical survey will be conducted across the site to locate and determine the lateral extent of buried nonindigenous materials. This survey will provide the data necessary to prepare a map showing areas of conductivity and magnetic intensity that vary from measured background values. These anomalies represent potential buried materials and therefore can be targeted for further evaluation. This work plan outlines the activities necessary to conduct the geophysical survey.

Not Available

1994-02-01T23:59:59.000Z

197

INEL cold test pit demonstration of improvements in information derived from non-intrusive geophysical methods over buried waste sites. Phase 1, Final report  

SciTech Connect

The objectives of this research project were to lay the foundation for further improvement in the use of geophysical methods for detection of buried wastes, and to increase the information content derived from surveys. Also, an important goal was to move from mere detection to characterization of buried wastes. The technical approach to achieve these objectives consisted of: (1) Collect a data set of high spatial density; (2) Acquire data with multiple sensors and integrate the interpretations inferred from the various sensors; (3) Test a simplified time domain electromagnetic system; and (4) Develop imaging and display formats of geophysical data readily understood by environmental scientists and engineers. The breadth of application of this work is far reaching. Not only are uncontrolled waste pits and trenches, abandoned underground storage tanks, and pipelines found throughout most US DOE facilities, but also at military installations and industrial facilities. Moreover, controlled land disposal sites may contain ``hot spots`` where drums and hazardous material may have been buried. The technologies addressed by the R&D will benefit all of these activities.

Not Available

1993-09-08T23:59:59.000Z

198

Comprehensive Approaches to Multiphase Flows in Geophysics - Application to nonisothermal, nonhomogenous, unsteady, large-scale, turbulent dusty clouds I. Hydrodynamic and Thermodynamic RANS and LES Models  

Science Conference Proceedings (OSTI)

The objective of this manuscript is to fully derive a geophysical multiphase model able to ''accommodate'' different multiphase turbulence approaches; viz., the Reynolds Averaged Navier-Stokes (RANS), the Large Eddy Simulation (LES), or hybrid RANSLES. This manuscript is the first part of a larger geophysical multiphase project--lead by LANL--that aims to develop comprehensive modeling tools for large-scale, atmospheric, transient-buoyancy dusty jets and plume (e.g., plinian clouds, nuclear ''mushrooms'', ''supercell'' forest fire plumes) and for boundary-dominated geophysical multiphase gravity currents (e.g., dusty surges, diluted pyroclastic flows, dusty gravity currents in street canyons). LES is a partially deterministic approach constructed on either a spatial- or a temporal-separation between the large and small scales of the flow, whereas RANS is an entirely probabilistic approach constructed on a statistical separation between an ensemble-averaged mean and higher-order statistical moments (the so-called ''fluctuating parts''). Within this specific multiphase context, both turbulence approaches are built up upon the same phasic binary-valued ''function of presence''. This function of presence formally describes the occurrence--or not--of any phase at a given position and time and, therefore, allows to derive the same basic multiphase Navier-Stokes model for either the RANS or the LES frameworks. The only differences between these turbulence frameworks are the closures for the various ''turbulence'' terms involving the unknown variables from the fluctuating (RANS) or from the subgrid (LES) parts. Even though the hydrodynamic and thermodynamic models for RANS and LES have the same set of Partial Differential Equations, the physical interpretations of these PDEs cannot be the same, i.e., RANS models an averaged field, while LES simulates a filtered field. In this manuscript, we also demonstrate that this multiphase model fully fulfills the second law of thermodynamics and fulfills the necessary requirements for a well-posed initial-value problem. In the next manuscripts, we will further develop specific closures for multiphase RANS, LES, and hybrid-LES.

S. Dartevelle

2005-09-05T23:59:59.000Z

199

GEOPHYSICS AND SITE CHARACTERIZATION AT THE HANFORD SITE THE SUCCESSFUL USE OF ELECTRICAL RESISTIVITY TO POSITION BOREHOLES TO DEFINE DEEP VADOSE ZONE CONTAMINATION - 11509  

SciTech Connect

Historic boreholes confirmed the presence of nitrate and radionuclide contaminants at various intervals throughout a more than 60 m (200 ft) thick vadose zone, and a 2010 electrical resistivity survey mapped the known contamination and indicated areas of similar contaminants, both laterally and at depth; therefore, electrical resistivity mapping can be used to more accurately locate characterization boreholes. At the Hanford Nuclear Reservation in eastern Washington, production of uranium and plutonium resulted in the planned release of large quantities of contaminated wastewater to unlined excavations (cribs). From 1952 until 1960, the 216-U-8 Crib received approximately 379,000,000 L (100,000,000 gal) of wastewater containing 25,500 kg (56,218 lb) uranium; 1,029,000 kg (1,013 tons) of nitrate; 2.7 Ci of technetium-99; and other fission products including strontium-90 and cesium-137. The 216-U-8 Crib reportedly holds the largest inventory of waste uranium of any crib on the Hanford Site. Electrical resistivity is a geophysical technique capable of identifying contrasting physical properties; specifically, electrically conductive material, relative to resistive native soil, can be mapped in the subsurface. At the 216-U-8 Crib, high nitrate concentrations (from the release of nitric acid [HNO{sub 3}] and associated uranium and other fission products) were detected in 1994 and 2004 boreholes at various depths, such as at the base of the Crib at 9 m (30 ft) below ground surface (bgs) and sporadically to depths in excess of 60 m (200 ft) bgs. These contaminant concentrations were directly correlative with the presence of observed low electrical resistivity responses delineated during the summer 2010 geophysical survey. Based on this correlation and the recently completed mapping of the electrically conductive material, additional boreholes are planned for early 2011 to identify nitrate and radionuclide contamination: (a) throughout the entire vertical length of the vadose zone (i.e., 79 m [260 ft] bgs) within the footprint of the Crib, and (b) 15 to 30 m (50 to 100 ft) east of the Crib footprint, where contaminants are inferred to have migrated through relatively permeable soils. Confirmation of the presence of contamination in historic boreholes correlates well with mapping from the 2010 survey, and serves as a basis to site future characterization boreholes that will likely intersect contamination both laterally and at depth.

GANDER MJ; LEARY KD; LEVITT MT; MILLER CW

2011-01-14T23:59:59.000Z

200

Solar-geophysical activity reports for STIP (study of travelling interplanetary phenomena) Interval 15, 12-21 February 1984 ground-level event and STIP Interval 16, 20 April-4 May 1984 Forbush decrease  

Science Conference Proceedings (OSTI)

Contents include: solar-geophysical activity reports for STIP Interval XV 12-21 February 1984 ground-level event and STIP interval XVI 20 April-4 May 1984 Forbush decrease; overview of solar-terrestrial physics phenomena for STIP interval XV (12-21 February 1984) and STIP interval XVI (20 April-4 May 1984) (solar optical reports, solar radio events, spacecraft observations, cosmic ray observations, ionosphere, geomagnetism).

Coffey, H.E.; Allen, J.H.

1987-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Geophysical study of the crust and upper mantle beneath the central Rio Grande rift and adjacent Great Plains and Colorado Plateau  

Science Conference Proceedings (OSTI)

As part of the national hot dry rock (HDR) geothermal program conducted by Los Alamos Scientific Laboratory, a regional deep magnetotelluric (MT) survey of Arizona and New Mexico was performed. The main objective of the MT project was to produce a regional geoelectric contour map of the pervasive deep electrical conductor within the crust and/or upper mantle beneath the Colorado Plateau, Basin and Range Province, and Rio Grande rift. Three MT profiles cross the Jemez lineament. Preliminary one-dimensional analysis of the data suggest the lineament is associated with anomalously high electrical conductivity very shallow in the crust. An MT/audiomagnetotelluric (AMT) study of a 161 km/sup 2/ HDR prospect was performed on the Zuni Indian Reservation, New Mexico. Two-dimensional gravity modeling of a 700-km gravity profile at 34/sup 0/30'N latitude was used to study the crust and upper mantle beneath the Rio Grande rift. Several models of each of three consecutive layers were produced using all available geologic and geophysical constraints. Two short-wavelength anomalies along the gravity profile were analyzed using linear optimization techniques.

Ander, M.E.

1981-03-01T23:59:59.000Z

202

Nonlinear Processes in Geophysics c?European Geophysical Society 2002  

E-Print Network (OSTI)

Abstract. The paper presents measurements performed on the granular flow that develops in a drum partially filled with sand grains and rotating at various speeds. The aims of the paper are: to provide experimental evidence and measurements on grain flow in a drum; to compare theoretical and experimental velocity profiles; to point out discrepancies among theory and experiments. Velocity and temperature profiles were obtained with a Laser Doppler Anemometer (LDA) in the mid-section of the stream, where the flow is usually uniform; image analysis and visual observations of the flow were also carried out to evaluate the local slope, the depths of the characteristic flow regions and the concentration of the granular material. A semi-empirical relation that fits the experimental velocity profiles is presented and compared with Takahashis velocity distributions for rigid and erodible bed. As proven by the distributions of free surface elevation, velocity, volumetric concentration and grain size across the drum, the three-dimensional nature of the flow field is not negligible. By increasing the drum rotation speed, in correspondence with critical and supercritical flows, changes in the flow regime are observed with formation of quasi-stationary surface waves. Wave development is described by analysing the extension and form of the experimental and theoretical velocity profiles. Wave effects on measurements are quantified and checked comparing the free-surface velocity-discharge relation obtained from experiments and from Takahashis model for erodible bed. 1

B. Zanuttigh; A. Lamberti

2000-01-01T23:59:59.000Z

203

Grantee: Stanford University Geophysics Department  

E-Print Network (OSTI)

-cohesive substrata: (i) spherical glass beads d50=1.09mm; (ii) angular very coarse sand d that only such flume-based studies, with tight environmental control and measurement colonies of Phormidium over d50=0.3- 0.5 mm sand; Fig. 3: ESEM of biofilm over d

Nur, Amos

204

Early lunar geology and geophysics  

E-Print Network (OSTI)

Despite a number of human and robotic missions to the Moon, there are still important unanswered questions about its early evolution, and how it came to be the object we observe today. Here we use observational, experimental, ...

Garrick-Bethell, Ian, 1980-

2009-01-01T23:59:59.000Z

205

Geological/geophysical study progresses  

SciTech Connect

Robertson Research (U.S.) Inc. of Houston is working on the second of a planned three-phase regional geological and geochemical study of Paleozoic rocks in the Williston Basin. The studies cover the entire Williston Basin in North Dakota, South Dakota, Montana, Saskatchewan and Manitoba. Each report is based largely on original petrographic, well log, and geochemical data that were developed by Robertson.

Savage, D.

1983-10-01T23:59:59.000Z

206

TH?C?230A?05: Neutron Scattered Dose Equivalent to a Fetus From Proton Radiotherapy of the Mother  

Science Conference Proceedings (OSTI)

Scatteredneutrondose equivalent to a representative point for a fetus is evaluated in an anthropomorphic phantom of the mother undergoing protonradiotherapy. The effect on scatteredneutrondose equivalent to the fetus of changing the incident proton beam energy

G Mesoloras; G Sandison; R Stewart; J Farr; W Hsi

2006-01-01T23:59:59.000Z

207

A coupled THC model of the FEBEX in situ test with bentonite swelling and chemical and thermal osmosis  

E-Print Network (OSTI)

of geological porous media with multiphase flow: theory andmultiphase flow and reactive transport in deformable porousisothermal multiphase flow and reactive transport in porous

Zheng, L.

2012-01-01T23:59:59.000Z

208

Evaluation and combined geophysical interpretations of NURE and related geoscience data in the Van Horn, Pecos, Marfa, Fort Stockton, Presidido, and Emory Peak quadrangles, Texas. Volume 1. Final report  

SciTech Connect

This report (two volumes) is the culmination of a two-year study of the six Trans-Pecos Texas quadrangles (Van Horn, Pecos, Marfa, Fort Stockton, Presidio, and Emory Park) surveyed as part of the National Uranium Resource Evaluation (NURE) program. Volume I contains a discussion of the aeromagnetic, gravity and geochemical data, their processing, and their analysis. The geologic history and setting of the Trans-Pecos are discussed along with the uranium potential of the region. Uranium anomalies and occurrences characteristic of numerous different NURE classes are present in the study area, and information is presented on 33 drill holes into these targets. Volume II is a folio of maps reduced to a scale of 1:500,000. Geologic maps for each of the six quadrangles are included and the geophysical maps have been prepared to be overlays for the goelogic maps. In addition to the geologic maps, residual aeromagnetic anomaly, complete Bouguer gravity anomaly, flight line index, gravity station index, and anomaly interpretative maps were prepared for each quadrangle. A large suite of digitally processed maps of gravity and aeromagnetic data were prepared and are included in Volume II.

Keller, G.R.; Hinze, W.J.; Aiken, C.L.V.; Goodell, P.C.; Roy, R.F.; Pingitore, N.E.

1981-09-01T23:59:59.000Z

209

Geophysical survey, Paso Robles Geothermal area, California: Part of the Resource Assessment of Low- and Moderate-Temperature Geothermal Resource Areas in California; Part of the Second year Report, 1979-80 of the US Department of Energy-California State-Coupled Program for Reservoir Assessment and Confirmation  

DOE Green Energy (OSTI)

This report presents the details of new geophysical work for the Paso Robles geothermal area, California performed under terms of the second year contract, 1979-80 between the US Department of Energy (DOE) and the California Division of Mines and Geology (CDMG). The report contains two sections. The first section is to provide background for the reader and consists of a reprint from CDMG's first year report (1979-80) to DOE. It describes only the Paso Robles studies performed by CDMG in its first year effort. The second section provides new information developed by CDMG in its 1979-80 studies concerning the geophysical survey of the Paso Robles geothermal area. Included in the first section is some general background information concerning the geology and geothermal occurrences in the Southern Coast Ranges, as well as the more detailed information dealing with the Paso Robles area proper. The second section is concerned only with discussion and interpretation of results for two geophysical methods that have so far been used by CDMG in the area: the ground magnetic and gravity surveys. The CDMG studies of the Paso Robles area are not yet complete and additional studies using newly acquired resistivity equipment are planned for the near future, as are more complete surveys of existing wells and new studies of the geothermal aquifers present in the area. A final report to DOE on the Paso Robles area is planned following completion of those studies.

Chapman, Rodger H.; Chase, Gordon W.; Youngs, Les G.

1980-11-10T23:59:59.000Z

210

Gamma Radiation Dose Rate in Air due to Terrestrial Radionuclides in Southern Brazil: Synthesis by Geological Units and Lithotypes Covered by the Serra do Mar Sul Aero-Geophysical Project  

SciTech Connect

The absorbed dose rates in air due to terrestrial radionuclides were estimated from aerial gamma spectrometric data for an area of 48,600 km{sup 2} in Southern Brazil. The source data was the Serra do Mar Sul Aero-Geophysical Project back-calibrated in a cooperative work among the Geological Survey of Brazil, the Geological Survey of Canada, and Paterson, Grant and Watson Ltd. The concentrations of eU (ppm), eTh (ppm) and K (%) were converted to dose rates in air (nGy{center_dot}h{sup -1}) by accounting for the contribution of each element's concentration. Regional variation was interpreted according to lithotypes and a synthesis was performed according to the basic geological units present in the area. Higher values of total dose were estimated for felsic igneous and metamorphic rocks, with average values varying up to 119{+-}24 nGy{center_dot}h{sup -1}, obtained by Anitapolis syenite body. Sedimentary, metasedimentary and metamafic rocks presented the lower dose levels, and some beach deposits reached the lowest average total dose, 18.5{+-}8.2 nGy{center_dot}h{sup -1}. Thorium gives the main average contribution in all geological units, the highest value being reached by the nebulitic gneisses of Atuba Complex, 71{+-}23 nGy{center_dot}h{sup -1}. Potassium presents the lowest average contribution to dose rate in 53 of the 72 units analyzed, the highest contribution being obtained by intrusive alkaline bodies (28{+-}12 nGy{center_dot}h{sup -1}). The general pattern of geographic dose distribution respects well the hypotheses on geo-physicochemical behavior of radioactive elements.

Bastos, Rodrigo O.; Appoloni, Carlos R. [Applied Nuclear Physics Laboratory-Department of Physics-CCE State University of Londrina Campus Universitario-Rodovia Celso Garcia Cid s/n, Cx. Postal 6001, CEP 86051-990, Londrina, PR (Brazil); Pinese, Jose P. P. [Department of Geosciences-CCE State University of Londrina Campus Universitario-Rodovia Celso Garcia Cid s/n, Cx. Postal 6001, CEP 86051-990, Londrina, PR (Brazil)

2008-08-07T23:59:59.000Z

211

POSTPEROVSKITE PHASE TRANSITION AND ITS GEOPHYSICAL IMPLICATIONS  

E-Print Network (OSTI)

of the experimental and theoretical studies, phase transitions from perovskite to postperovskite have been reported so. Crystal structure of the postperovskite phase projected along [001], [100], and [010] directions. [2004] and Tsuchiya et al. [2004b]. [23] The high-P-T phase diagram of MgSiO3 was also investigated

Jellinek, Mark

212

Leasing and Exploration * Seismic geophysical surveys  

E-Print Network (OSTI)

taking of bowhead whales due to certain oil and gas exploration activities by NMFS. Section 101 (a)(5) prepared by MMS, as well as pertinent research on the bowhead whale and matters related to oil exploration effect on the species or stock and its habitat. These authorizations are often requested for oil and gas

213

Geophysical Monitoring of Hydrological and Biogeochemical  

E-Print Network (OSTI)

was performed in 2004, including the installation of an injection well (Well 45) and a downgradient monitoring (Wells 41 and42)weredrilledapproximatelytwoyearspoststimulation; one was located between the injection with the polylactate decomposi- tion. The produced hydrogen can decrease the pH in the vicinity of the injection well

Chen, Jinsong

214

Geophysical constraints on sediment dispersal systems  

E-Print Network (OSTI)

sea level and tectonic subsidence/uplift. When sedimentFast Low - - - Subsidence - - - Fast Transgressive Mesasbetween tectonics (subsidence), sea level change and

Johnstone, Elizabeth Anne Carruthers; Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

215

Geophysical Constraints on Sediment Dispersal Systems  

E-Print Network (OSTI)

sea level and tectonic subsidence/uplift. When sedimentFast Low - - - Subsidence - - - Fast Transgressive 0HVDVbetween tectonics (subsidence), sea level change and

Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

216

STANFORD ROCK PHYSICS BOREHOLE GEOPHYSICS PROJECT  

E-Print Network (OSTI)

of magnetism at work, an individual would witness "an impulse...conjoined to an event...which according

Nur, Amos

217

Geological and Geophysical Investigations of the Hydrogeology  

E-Print Network (OSTI)

: Canol Road Area Daniel E. Lawson, Jeffrey C. Strasser, Jodie D. Strasser, Steven A. Arcone, Allan J of Fort Wainwright, Alaska Part I: Canol Road Area Daniel E. Lawson, Jeffrey C. Strasser, Jodie D

218

Filtering Turbulent Sparsely Observed Geophysical Flows  

Science Conference Proceedings (OSTI)

Filtering sparsely turbulent signals from nature is a central problem of contemporary data assimilation. Here, sparsely observed turbulent signals from nature are generated by solutions of two-layer quasigeostrophic models with turbulent cascades ...

John Harlim; Andrew J. Majda

2010-04-01T23:59:59.000Z

219

Institute of geophysics and planetary physics  

Science Conference Proceedings (OSTI)

This report contains brief discussions on topics of high-pressure sciences, astrophysics, and geosciences. (LSP)

Ryerson, F.; Budwine, C.M. (eds.)

1991-05-10T23:59:59.000Z

220

CRC handbook of geophysical exploration at sea  

Science Conference Proceedings (OSTI)

The broad subject matter presented in this volume can be classified into two general categories: potential field methods as represented by gravity magnetic, electrical and telluric methods; and those based on elastic wave theory with emphasis on acoustic and seismic waves. Geographic coverage is broad, including operational methods conducted in continental as well as deep waters in the Atlantic and Pacific Oceans and the Gulf of Mexico and Alaska. The results of recent diversified research and operational techniques are described.

Geyer, R.A.

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

AMERICAN GEOPHYSICAL UNION Fall meeting 2009  

E-Print Network (OSTI)

will be validated in more detail. O O References: Kosek, W. (1995), Time Variable Band Pass Filter Spectra of Real Campaigns; Geodetic Week, Munich, Germany ReferencesReferences:: Kosek, W. (1995), Time Variable Band Pass

Schuh, Harald

222

STANFORD ROCK PHYSICS BOREHOLE GEOPHYSICS PROJECT  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B1 Velocity-pressure and porosity-pressure trends in sands Zimmer, Prasad & Mavko. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B2 Comparison between hydrostatic pressure and polyaxial stress tests in sands Vega, Prasad, Mavko to the grain material properties, porosity, pressure, and pore fluid. By comparing these models to experimental

Nur, Amos

223

STANFORD ROCK PHYSICS BOREHOLE GEOPHYSICS PROJECT  

E-Print Network (OSTI)

TABLE OF CONTENTS A: Rock Physics and Geology. Pressure-solution models and the velocity......................................................... A3 Pressure trends of compressional-and shear-wave velocities measured measured in sands to 20 MPA.....................................................C3 Properties of pore fluids at very high pressures from equations of state. Walls & Dvorkin

Nur, Amos

224

BASIC GEOPHYSICAL FLUID Lecture 1: Introduction -  

E-Print Network (OSTI)

conservation, equations of state. · Rotating frame of reference, Centrifugal and Coriolis forces. · Local a perfect gas: pV = RT for 1 mole where R = molar gas const = 8.3 J mol-1 K-1. If M = mass of 1 mole, = M/

Read, Peter L.

225

Geophysical constraints on sediment dispersal systems  

E-Print Network (OSTI)

JOURNAL OF SURVEYING ENGINEERING ASCE / FEBRUARY 2011 / 25a parameter analysis, ASCE Journal of Surveying Engineering,using Terrestrial LIDAR, ASCE Solutions to Coastal Disasters

Johnstone, Elizabeth Anne Carruthers; Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

226

Geophysical Constraints on Sediment Dispersal Systems  

E-Print Network (OSTI)

JOURNAL OF SURVEYING ENGINEERING ASCE / FEBRUARY 2011 / 25a parameter analysis, ASCE Journal of Surveying Engineering,using Terrestrial LIDAR, ASCE Solutions to Coastal Disasters

Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

227

Understanding biogeobatteries: Where geophysics meets microbiology  

E-Print Network (OSTI)

160 mV. b. Electrical resistivity tomography profile (takethe distribution of electrical resistivity and interpreted? = 1/ ? is the electrical resistivity of the ground outside

Revil, A.

2010-01-01T23:59:59.000Z

228

Geophysical Constraints on Sediment Dispersal Systems  

E-Print Network (OSTI)

modest because the source rock lithology is limestone-consis- tent with its source rock composition and longsources of silica in sediments are the weathering of rocks

Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

229

Geophysical constraints on sediment dispersal systems  

E-Print Network (OSTI)

modest because the source rock lithology is limestone-consis- tent with its source rock composition and longsources of silica in sediments are the weathering of rocks

Johnstone, Elizabeth Anne Carruthers; Johnstone, Elizabeth Anne Carruthers

2012-01-01T23:59:59.000Z

230

Expedited Site Characterization Geophysics: Geophysical Methods and Tools for Site Characterization  

E-Print Network (OSTI)

storage and disposal of mixed waste. References Bendix Fieldwas tested by Sandia at the Mixed Waste Landfill Integratedtested over Sandia's mixed-waste landfill test site. Both

Goldstein, N.E.

2009-01-01T23:59:59.000Z

231

Expedited Site Characterization Geophysics: Geophysical Methods and Tools for Site Characterization  

E-Print Network (OSTI)

DOE Office of Environmental Management, or electromagneticOffice of Technology Development, Environmental Restoration and Waste Management,

Goldstein, N.E.

2009-01-01T23:59:59.000Z

232

GEOPHYSICS, VOL. 66, NO. 1 (JANUARY-FEBRUARY 2001); P. 2530 Reservoir geophysics  

E-Print Network (OSTI)

of discov- eries. As cost-efficiency has taken over as a driving force in the economics of the oil and gas seismic, has greatly reduced the risk associated with drilling wells in existing fields, and the ability well log data, de- scribing the lithology (including the mineralogy, porosity, and Michigan

233

Final Report DOE Contract No. DE-FG36-04G014294 ICEKAP 2004: A Collaborative Joint Geophysical Imaging Project at Krafla and IDDP P.E. Malin, S.A. Onacha, E. Shalev Division of Earth and Ocean Sciences Nicholas School of the Environment Duke University Durham, NC 27708  

SciTech Connect

In this final report, we discuss both theoretical and applied research resulting from our DOE project, ICEKAP 2004: A Collaborative Joint Geophysical Imaging Project at Krafla and IDDP. The abstract below begins with a general discussion of the problem we addressed: the location and characterization of blind geothermal resources using microearthquake and magnetotelluric measurements. The abstract then describes the scientific results and their application to the Krafla geothermal area in Iceland. The text following this abstract presents the full discussion of this work, in the form of the PhD thesis of Stephen A. Onacha. The work presented here was awarded the Best Geophysics Paper at the 2005 Geothermal Resources Council meeting, Reno. This study presents the modeling of buried fault zones using microearthquake and electrical resistivity data based on the assumptions that fluid-filled fractures cause electrical and seismic anisotropy and polarization. In this study, joint imaging of electrical and seismic data is used to characterize the fracture porosity of the fracture zones. P-wave velocity models are generated from resistivity data and used in locating microearthquakes. Fracture porosity controls fluid circulation in the hydrothermal systems and the intersections of fracture zones close to the heat source form important upwelling zones for hydrothermal fluids. High fracture porosity sites occur along fault terminations, fault-intersection areas and fault traces. Hydrothermal fault zone imaging using resistivity and microearthquake data combines high-resolution multi-station seismic and electromagnetic data to locate rock fractures and the likely presence fluids in high temperature hydrothermal systems. The depths and locations of structural features and fracture porosity common in both the MT and MEQ data is incorporated into a joint imaging scheme to constrain resistivity, seismic velocities, and locations of fracture systems. The imaging of the fault zones is constrained by geological, drilling, and geothermal production data. The objective is to determine interpretation techniques for evaluating structural controls of fluid circulation in hydrothermal systems. The conclusions are: directions of MT polarization and anisotropy and MEQ S-splitting correlate. Polarization and anisotropy are caused by fluid filled fractures at the base of the clay cap. Microearthquakes occur mainly on the boundary of low resistivity within the fracture zone and high resistivity in the host rock. Resistivity is lowest within the core of the fracture zone and increases towards the margins of the fracture zone. The heat source and the clay cap for the hydrothermal have very low resistivity of less than 5?m. Fracture porosity imaged by resistivity indicates that it varies between 45-5% with most between 10-20%, comparable to values from core samples in volcanic areas in Kenya and Iceland. For resistivity values above 60?m, the porosity reduces drastically and therefore this might be used as the upper limit for modeling fracture porosity from resistivity. When resistivity is lower than 5?m, the modeled fracture porosity increases drastically indicating that this is the low resistivity limit. This is because at very low resistivity in the heat source and the clay cap, the resistivity is dominated by ionic conduction rather than fracture porosity. Microearthquakes occur mainly above the heat source which is defined by low resistivity at a depth of 3-4.5 km at the Krafla hydrothermal system and 4-7 km in the Longonot hydrothermal system. Conversions of S to P waves occur for microearthquakes located above the heat source within the hydrothermal system. Shallow microearthquakes occur mainly in areas that show both MT and S-wave anisotropy. S-wave splitting and MT anisotropy occurs at the base of the clay cap and therefore reflects the variations in fracture porosity on top of the hydrothermal system. In the Krafla hydrothermal system in Iceland, both MT polarization and MEQ splitting directions align with

Malin, Peter E.; Shalev, Eylon; Onacha, Stepthen A.

2006-12-15T23:59:59.000Z

234

Final Report DOE Contract No. DE-FG36-04G014294 ICEKAP 2004: A Collaborative Joint Geophysical Imaging Project at Krafla and IDDP P.E. Malin, S.A. Onacha, E. Shalev Division of Earth and Ocean Sciences Nicholas School of the Environment Duke University Durham, NC 27708  

Science Conference Proceedings (OSTI)

In this final report, we discuss both theoretical and applied research resulting from our DOE project, ICEKAP 2004: A Collaborative Joint Geophysical Imaging Project at Krafla and IDDP. The abstract below begins with a general discussion of the problem we addressed: the location and characterization of blind geothermal resources using microearthquake and magnetotelluric measurements. The abstract then describes the scientific results and their application to the Krafla geothermal area in Iceland. The text following this abstract presents the full discussion of this work, in the form of the PhD thesis of Stephen A. Onacha. The work presented here was awarded the Best Geophysics Paper at the 2005 Geothermal Resources Council meeting, Reno. This study presents the modeling of buried fault zones using microearthquake and electrical resistivity data based on the assumptions that fluid-filled fractures cause electrical and seismic anisotropy and polarization. In this study, joint imaging of electrical and seismic data is used to characterize the fracture porosity of the fracture zones. P-wave velocity models are generated from resistivity data and used in locating microearthquakes. Fracture porosity controls fluid circulation in the hydrothermal systems and the intersections of fracture zones close to the heat source form important upwelling zones for hydrothermal fluids. High fracture porosity sites occur along fault terminations, fault-intersection areas and fault traces. Hydrothermal fault zone imaging using resistivity and microearthquake data combines high-resolution multi-station seismic and electromagnetic data to locate rock fractures and the likely presence fluids in high temperature hydrothermal systems. The depths and locations of structural features and fracture porosity common in both the MT and MEQ data is incorporated into a joint imaging scheme to constrain resistivity, seismic velocities, and locations of fracture systems. The imaging of the fault zones is constrained by geological, drilling, and geothermal production data. The objective is to determine interpretation techniques for evaluating structural controls of fluid circulation in hydrothermal systems. The conclusions are: directions of MT polarization and anisotropy and MEQ S-splitting correlate. Polarization and anisotropy are caused by fluid filled fractures at the base of the clay cap. Microearthquakes occur mainly on the boundary of low resistivity within the fracture zone and high resistivity in the host rock. Resistivity is lowest within the core of the fracture zone and increases towards the margins of the fracture zone. The heat source and the clay cap for the hydrothermal have very low resistivity of less than 5?m. Fracture porosity imaged by resistivity indicates that it varies between 45-5% with most between 10-20%, comparable to values from core samples in volcanic areas in Kenya and Iceland. For resistivity values above 60?m, the porosity reduces drastically and therefore this might be used as the upper limit for modeling fracture porosity from resistivity. When resistivity is lower than 5?m, the modeled fracture porosity increases drastically indicating that this is the low resistivity limit. This is because at very low resistivity in the heat source and the clay cap, the resistivity is dominated by ionic conduction rather than fracture porosity. Microearthquakes occur mainly above the heat source which is defined by low resistivity at a depth of 3-4.5 km at the Krafla hydrothermal system and 4-7 km in the Longonot hydrothermal system. Conversions of S to P waves occur for microearthquakes located above the heat source within the hydrothermal system. Shallow microearthquakes occur mainly in areas that show both MT and S-wave anisotropy. S-wave splitting and MT anisotropy occurs at the base of the clay cap and therefore reflects the variations in fracture porosity on top of the hydrothermal system. In the Krafla hydrothermal system in Iceland, both MT polarization and MEQ splitting directions align with

Malin, Peter E.; Shalev, Eylon; Onacha, Stepthen A.

2006-12-15T23:59:59.000Z

235

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Space Physics' Space Physics' Focus Leader: Josef Koller jkoller@lanl.gov Proposals are solicited that advance theoretical research, computational research, and/or observational research into the plasma environment of the Earth's atmosphere, the magnetosphere, and into processes that affect these environments. Research on the transport of plasma and energy from the Sun through interplanetary space to the Earth and other planets is also encouraged. These include the interaction of various plasma populations and the coupling of microscopic and macroscopic phenomena. The following topics are covered: solar dynamics responsible for the solar wind magnetohydrodynamics of the magnetosphere and thermosphere magnetospheric substorms Ionosphere lightening magnetotail current sheet dynamics

236

PRELIMINARY REPORT ON GEOPHYSICAL AND MECHANICAL BOREHOLE MEASUREMENTS AT STRIPA  

E-Print Network (OSTI)

Logging unit with 1000 m of armored cable 2.2 Block diagramcontroller, about 1000 m of armored, four-~vlluu~ XBB 7711-caliper unit with 1000 m of armored cable. In foreground,

Nelson, P.

2011-01-01T23:59:59.000Z

237

Helicopter Geophysics Applied to Upstream Oil and Gas Operations  

NLE Websites -- All DOE Office Websites (Extended Search)

Co. Site Washington County Site Pre- Development Site Construction Well Drilling Well Stimulation Production One Year 2.5 Years Location of Legacy Wells Teapot...

238

Theory of Model-Based Geophysical Survey and Experimental Design  

E-Print Network (OSTI)

and Donev, 1992; Pukelsheim, 1993; references therein), but again Curtis (1999b) shows that in large. For such cases the reader is referred to Part B of this tutorial. #12;21 References Atkinson, A. C., and Donev, A

239

Integrated Geophysical Exploration of a Known Geothermal Resource...  

Open Energy Info (EERE)

energy production. The hot springs are in a region of complex and intersecting fault trends associated with two major extensional events, the Oregon-Idaho Graben and the Western...

240

Geophysical logging case history of the Raft River geothermal...  

Open Energy Info (EERE)

variety of rock types, the presence of alteration products, and the variability of fracturing make reliable interpretations difficult. However, the cross plotting of various...

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to obtain the most current and comprehensive results.


241

Geophysical Setting of the Blue Mountain Geothermal Area, North...  

Open Energy Info (EERE)

a prominent crustal-scale fracture interpreted from total intensity aeromagnetic and gravity data. Aeromagnetic data indicate that this feature is related to the intrusion of...

242

A Geothermal Field Model Based On Geophysical And Thermal Prospectings...  

Open Energy Info (EERE)

results of some deep electrical soundings (AB 6000 m) with the interpretation of a gravity profile crossing the investigated area are considered together with thermal...

243

Geophysical Studies in the Vicinity of Blue Mountain and Pumpernickel...  

Open Energy Info (EERE)

to September 2009, the U.S. Geological Survey (USGS) collected data from more than 660 gravity stations, 100 line-km of truck-towed magnetometer traverses, and 260...

244

Geologic And Geophysical Evidence For Intra-Basin And Footwall...  

Open Energy Info (EERE)

the TertiaryQuaternary basin-fill sediments. Correlation with seismic reflection and gravity surveys shows that some faults recognized by minor displacements at the surface...

245

A Quasi-equilibrium Turbulent Energy Model for Geophysical Flows  

Science Conference Proceedings (OSTI)

The Mellor-Yamada hierarchy of turbulent closure models is reexamined to show that the elimination of a slight inconsistency in their analysis leads to a quasi-equilibrium model that is somewhat simpler than their level 2 model. Also the need to ...

B. Galperin; L. H. Kantha; S. Hassid; A. Rosati

1988-01-01T23:59:59.000Z

246

Symmetry Methods for a Geophysical Mass Flow Model  

Science Conference Proceedings (OSTI)

In the framework of symmetry analysis, the class of 2 x 2 PDE systems to whom belong the Savage and Hutter model and the Iverson model is considered. New classes of exact solutions are found.

Torrisi, Mariano; Tracina, Rita [Dipartimento di Matematica e Informatica, Viale A. Doria 6, Catania (Italy)

2011-09-14T23:59:59.000Z

247

Geophysical Research Abstracts Vol. 12, EGU2010-5305, 2010  

E-Print Network (OSTI)

. Two power plants generate electricity and fluid extraction rate varies with time and wells features of the crust and to mon- itor underground changes of seismic wave ground velocity. We present French high-enthalpy geothermal system exploited for electrical power from 3 collocated productive wells

Paris-Sud XI, Université de

248

Geophysical investigation of the Warm Springs, Montana area  

DOE Green Energy (OSTI)

The location, geology, and previous work in the area are described briefly. The gravity and resistivity survey methods are presented and the results are discussed. (MHR)

Halvorson, J.W.; Wideman, C.J.

1979-12-01T23:59:59.000Z

249

A Geological And Geophysical Appraisal Of The Baca Geothermal...  

Open Energy Info (EERE)

New Mexico within the western half of the Plio-Pleistocene Valles Caldera. Steam and hot water are produced primarily from the northeast-trending Redondo Creek graben, where...

250

An Integrated Geophysical Analysis Of The Upper Crust Of The...  

Open Energy Info (EERE)

crustal structure. We used results from surface geological mapping, drill hole data from water wells and geothermal exploration wells, KRISP 85 seismic data for a profile across...

251

New geophysical approaches to study neotectonics and associated geohazards  

E-Print Network (OSTI)

control of fluid flow: offshore fluid seepage in the SantaRegional Method to Assess Offshore Slope Stability: Journalin southern California, Offshore Tech. Conf. , Volume OTC

Dingler, Jeffrey A

2007-01-01T23:59:59.000Z

252

Geophysical Research Abstracts, Vol. 11, EGU2009-12466, 2009  

E-Print Network (OSTI)

time-dependent deformation through stress corrosion cracking that allows rocks to deform at stresses that stress corrosion appears to be inhibited at higher effective stresses. The influence of doubling the pore on the rate of stress corrosion. We then discuss the results in light of acoustic emission hypocentre location

253

Helicopter Geophysics Applied to Upstream Oil and Gas Operations  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Systems Monitoring Applications Towards Engineered-Natural Systems Geothermal Systems Geologic CO 2 Storage Offshore Systems Conventional and Unconventional Oil...

254

EOS, TRANSACTIONS, AMERICAN GEOPHYSICAL UNION Counting Atlantic Tropical  

E-Print Network (OSTI)

Climate variability and any resulting change in the characteristics of tropical cyclones (tropical storms, subtropical storms, and hurricanes) have become topics of great interest and research within the past 2 years [International Workshop on Tropical Cyclones, 2006]. An emerging focus is how the frequency of tropical cyclones has changed over time and whether any changes could be linked to anthropogenic global warming. The Atlantic is the one tropical cyclone basin that has quantitative records back to the midnineteenth century for the whole basin (i.e., North Atlantic Ocean, Caribbean Sea, and Gulf of Mexico) [Jarvinen et al., 1984; Landsea et al.,

Cyclones Back To

2007-01-01T23:59:59.000Z

255

Near-Surface Geophysics: Seismic & GRP data for Site Characterization  

E-Print Network (OSTI)

from unambiguous interpretation. Dispersion curve inversion was attempted via Genetic Algorithms (GAs of Dispersion Curve Inversion Fundamental mode dispersion curve for a 5-layer model was synthetically calculated

Cerveny, Vlastislav

256

Nonlinear Processes in Geophysics (2003) 10: 557564 Nonlinear Processes  

E-Print Network (OSTI)

Alexidze str, 380093 Tbilisi, Georgia 2 Tbilisi State University, 1, Chavchavadze Ave, 380028, Tbilisi

Paris-Sud XI, Université de

257

Geophysical logs from water wells in the Yakima area, Washington  

DOE Green Energy (OSTI)

The logs include: natural gamma, gamma gamma, neutron neutron, neutron gamma, caliper, fluid temperature, fluid resistivity, wall resistivity, spontaneous potential, and flow meter.

Biggane, J.H.

1983-01-01T23:59:59.000Z

258

Geophysical Research Abstracts Vol. 13, EGU2011-10343, 2011  

E-Print Network (OSTI)

Innocent (), Emmanuelle Petelet-Giraud (3), and Pierre Durst (4) (1) BRGM, Regional Geological Survey, Regional Geological Survey Service Bordeaux, France, p.durst@brgm.fr In the south-west of France

Paris-Sud XI, Université de

259

Technical Sessions M. C. MacCracken Atmospheric amj Geophysical...  

NLE Websites -- All DOE Office Websites (Extended Search)

prolgram in the High Performance Computing and Communications Program, which is a new Presidential Initiative dedic:ated to the "grand challenge" computational problems. Just...

260

TEXAS A&M UNIVERSITY Reservoir Geophysics Program  

E-Print Network (OSTI)

includes applications to clastic reservoirs, heavy oil reservoirs, gas/oil shale, gas hydrates. Basic

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

GEOPHYSICAL METHODS In 2003, a group of scientists in Swit-  

E-Print Network (OSTI)

with Petrobras in Brazil, Pemex in Mexico, Norsk Hydro in Libya and KOC in the Arabian Peninsula, it is evident installed at a Pemex field in the Burgos basin, Mexico. JANUARY 2007 WorldOil #12;World Oil JANUARY 2007 3

Podladchikov, Yuri

262

LANL Institutes - Institute of Geophysics and Planetary Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

IGPPSLDRD Currently Funded Projects ASTRO First Science with the HAWK Gamma Ray Experiment Dark Matter Astrophysics New Neutrino Radiation Transport Methods for 3D Breakthrough...

263

EOS, TRANSACTIONS, AMERICAN GEOPHYSICAL UNION Nutrient Enrichment Drives  

E-Print Network (OSTI)

During most summers over the past 30 years, bottom dissolved oxygen across a large area of the Louisiana and upper Texas continental shelf declined to concentrations too low (hypoxia) for most fish and large invertebrate animals to survive. This area is one of the best known dead zones proliferating around the world [Diaz and Rosenberg, 2008]. During July 2008, hypoxic bottom waters extended across 20,720 square kilometers (Figure 1), but they were probably even more extensive because winds from Hurricane Dolly mixed the waters off Texas before the survey could be completed. Increased inputs of nutrients (principally nitrogen and phosphorus) from the U.S. agricultural heartland within the Mississippi- Atchafalaya River Basin ( MARB) are implicated in the development and spread of hypoxia in the Gulf of Mexico. Consequently, the causes of, and solutions for, hypoxia have been subjects of extensive debate and analysis. An integrated scientific assessment led to a 2001 Action Plan [Mississippi River / Gulf of Mexico Watershed Nutrient Task Force, 2001] with a goal of reducing the area of the hypoxic zone to less than 5000 square kilometers by reducing nitrogen loading [Rabalais et al., 2007]. are primarily related to nutrient fluxes from the MARB [SAB, 2008, p. 2]. The reconfirmed consensus is that anthropogenic nutrients stimulate the production of planktonic organic matter, the decomposition of which depletes dissolved oxygen in bottom waters on the seasonally stratified inner shelf. Despite these two major scientific assessments supporting this consensus, skeptics [Dagg et al., 2007; Bianchi et al., 2008] have suggested alternative causes of hypoxia, including (1) oxidation of organic matter not derived from phytoplankton production, (2) physical processes affecting water column stability, and (3) coastal wetland loss and river controls. This article addresses these criticisms and demonstrates why they do not challenge the consensus on nutrient enrichment. Organic Matter Sources Seasonally recurring hypoxia developed on the shelf from the 1970s through the 1990s, coinciding with a tripling of nitrate

Gulf Of Mexico Hypoxia

2009-01-01T23:59:59.000Z

264

Geophysical Research Abstracts Vol. 12, EGU2010-7553, 2010  

E-Print Network (OSTI)

-to-mild, but rather diverse with deposition of fallout tephra, base surges, and pyroclastic flows. Fallout deposits by Vulcanian-type activity. Deposits of pumice fallout (Md -4-(-2.5) phi, sorting 1.2-2.4 phi) from Plinian

Belousov, Alexander

265

GGHAWKERHAWKER Geology and Geophysics at The University of Kansas  

E-Print Network (OSTI)

and oil shale. Climate change is not considered a barrier to continued use of fossil fuels. Plan B ­ Clean

Peterson, Blake R.

266

CRC handbook of geophysical exploration at sea, 2nd edition  

Science Conference Proceedings (OSTI)

This book presents some of the most advanced research and operational information currently available about hard minerals and hydrocarbons. Information is provided in an integrated, interdisciplinary manner, stressing case histories and review chapters. Illustrations, graphs, tables, and color satellite images are used to graphically present the results of gravity, geodetic and seismic surveys, and 3-D sea floor sub-bottom visualizations. Data has been obtained from the Atlantic and Pacific Oceans, Gulf of Mexico, and Caribbean Sea using satellites, aircraft, and ships.

Geuer, R.A. (Offshore Technology Research Center, Texas A and M Univ., College Station, TX (US))

1990-01-01T23:59:59.000Z

267

MODELING COUPLED FLUID FLOW AND GEOMECHANICAL AND GEOPHYSICAL PHENOMENA WITHIN  

E-Print Network (OSTI)

. Specifically, the Mandel-Cryer effect (initially higher pore pressures resulting from a drained boundary condition) and the Noordbergum effect (initially higher pore pressures resulting from layered heterogeneity investigations, including sample-scale loading experiments, wellbore pressure-transient testing, and reservoir

268

New geophysical approaches to study neotectonics and associated geohazards  

E-Print Network (OSTI)

along faults in the Monterey Formation, coastal California:in the underlying Monterey Formation and determined that

Dingler, Jeffrey A

2007-01-01T23:59:59.000Z

269

In order to advance their geophysics and tectonics  

E-Print Network (OSTI)

without losing sight of the larger picture. The Optiputer technology, developed by UCSD's Calit2, utilizes Storage and Storage Array Networks provide the necessary infrastructure for proper data management geodynamic events over the past 200 million years, including a 35-million-year phase during the age

Russell, Lynn

270

Role of borehole geophysics in defining the physical characteristics...  

Open Energy Info (EERE)

in defining the physical characteristics of the Raft River geothermal reservoir, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Role of...

271

Merging High Resolution Geophysical and Geochemical Surveys to...  

Open Energy Info (EERE)

This program will combine detailed gravity, high resolution aeromagnetic, and LIDAR data, all of which will be combined for structural modeling, with hyperspectral data,...

272

Rules and Regulations Governing Geophysical, Seismic or Other...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

on State-Owned Lands Other than State-Owned Marine Waters is applicable to the Natural Gas Sector and the Coal with CCS Sector. This law is implemented under the jurisdiction of...

273

Geological and geophysical analysis of Coso Geothermal Exploration...  

Open Energy Info (EERE)

Only weak hydrothermal alteration was noted in these rocks. Drillhole surveys and drilling rate data indicate that the geothermal system is structurally controlled and that the...

274

DECOVALEX-THMC Task D: Long-Term Permeability/Porosity Changes in the EDZ and Near Field due to THM and THC Processes in Volcanic and Crystaline-Bentonite Systems, Status Report October 2005  

E-Print Network (OSTI)

thermal conductivity and heat capacity close to the initialby increasing the volumetric heat capacity of the rock massT2. The increase in heat capacity is described by Equation (

Birkholzer, J.; Rutqvist, J.; Sonnenthal, E.; Barr, D.

2005-01-01T23:59:59.000Z

275

DECOVALEX-THMC Task D: Long-Term Permeability/Porosity Changes in the EDZ and Near Field due to THM and THC Processes in Volcanic and Crystaline-Bentonite Systems, Status Report October 2005  

E-Print Network (OSTI)

Power Reactor and Nuclear Fuel Development Corporation (Power Reactor and Nuclear Fuel Development Corporation (evaluation 1997/2. Swedish Nuclear Fuel and Waste Management

Birkholzer, J.; Rutqvist, J.; Sonnenthal, E.; Barr, D.

2005-01-01T23:59:59.000Z

276

DECOVALEX-THMC Task D: Long-Term Permeability/Porosity Changes in the EDZ and Near Field due to THM and THC Processes in Volcanic and Crystaline-Bentonite Systems, Status Report October 2005  

E-Print Network (OSTI)

Although convective heat transfer processes are importantmain processes considered in Task D are heat transfer, fluidmain processes considered in Task D are heat transfer, fluid

Birkholzer, J.; Rutqvist, J.; Sonnenthal, E.; Barr, D.

2005-01-01T23:59:59.000Z

277

Investigating the Causes of the Response of the Thermohaline Circulation to Past and Future Climate Changes  

Science Conference Proceedings (OSTI)

The Atlantic thermohaline circulation (THC) is an important part of the earth's climate system. Previous research has shown large uncertainties in simulating future changes in this critical system. The simulated THC response to idealized ...

R. J. Stouffer; J. Yin; J. M. Gregory; K. W. Dixon; M. J. Spelman; W. Hurlin; A. J. Weaver; M. Eby; G. M. Flato; H. Hasumi; A. Hu; J. H. Jungclaus; I. V. Kamenkovich; A. Levermann; M. Montoya; S. Murakami; S. Nawrath; A. Oka; W. R. Peltier; D. Y. Robitaille; A. Sokolov; G. Vettoretti; S. L. Weber

2006-04-01T23:59:59.000Z

278

Two-Way Feedback Interaction between the Thermohaline and Wind-Driven Circulations  

Science Conference Proceedings (OSTI)

The thermohaline circulation (THC) affects the meridional atmospheric temperature gradient and therefore the atmospheric wind and the wind-driven ocean circulation. The wind-driven circulation (WDC), in turn, affects the THC by the advection of ...

Douglas G. MacMynowski; Eli Tziperman

2006-05-01T23:59:59.000Z

279

Mechanisms Determining the Atlantic Thermohaline Circulation Response to Greenhouse Gas Forcing in a Non-Flux-Adjusted Coupled Climate Model  

Science Conference Proceedings (OSTI)

Models of the North Atlantic thermohaline circulation (THC) show a range of responses to the high-latitude warming and freshening characteristic of global warming scenarios. Most simulate a weakening of the THC, with some suggesting possible ...

R. B. Thorpe; J. M. Gregory; T. C. Johns; R. A. Wood; J. F. B. Mitchell

2001-07-01T23:59:59.000Z

280

ENSO Suppression due to Weakening of the North Atlantic Thermohaline Circulation  

Science Conference Proceedings (OSTI)

Changes of the North Atlantic thermohaline circulation (THC) excite wave patterns that readjust the thermocline globally. This paper examines the impact of a freshwater-induced THC shutdown on the depth of the Pacific thermocline and its ...

A. Timmermann; S-I. An; U. Krebs; H. Goosse

2005-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Link: http://charles.karney.info/biblio/karney81b.html Temporal evolution of lower hybrid waves in the presence  

E-Print Network (OSTI)

space. In writing thc expression for D, we havc used the fbrtnula for thc density dcprcssion due to the pon- dcromolive lo. " Note that C is always positive. l'hc fact that C and D havc the sane signs has group velocities. I,at.er on, the otltcr n components havc had time to reach the far end of thc system

Karney, Charles

282

The History and Dynamics of Global Plate Motions, GEOPHYSICAL MONOGRAPH 121, M. Richards, R. Gordon and R. van der Hilst, eds., American Geophysical Union, pp546, 2000  

E-Print Network (OSTI)

thermal boundary layer, of mantle convection. We review how simple convection pertains to plate formation as we shall see in this review [see also review by Oxburgh and Turcotte, 1978]. However, there is still- ately, caused by mantle convection. There is little doubt that the direct energy source for plate

Bercovici, David

283

Feasibility of Geophysical Monitoring of Carbon-Sequestrated Deep Saline Aquifers  

NLE Websites -- All DOE Office Websites (Extended Search)

Customer Service: 1-800-553-7681 Customer Service: 1-800-553-7681 Projec t Fac ts Carbon Sequestration ContaCtS Sean Plasynski Sequestration Technology Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236-0940 412-386-4867 sean.plasynski@netl.doe.gov William W. Aljoe Project Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236-0940 412-386-6569 william.aljoe@netl.doe.gov Subhashis Mallick

284

Towards a phoenix phase in aeolian research: shifting geophysical perspectives from fluvial dominance  

Science Conference Proceedings (OSTI)

Aeolian processes are a fundamental driver of earth surface dynamics, yet the importance of aeolian processes in a broader geosciences context may be overshadowed by an unbalanced emphasis on fluvial processes. Here we wish to highlight that aeolian and fluvial processes need to be considered in concert relative to total erosion and to potential interactions, that relative dominance and sensitivity to disturbance vary with mean annual precipitation, and that there are important scale-dependencies associated with aeolian-fluvial interactions. We build on previous literature to present relevant conceptual syntheses highlighting these issues. We then highlight the relative investments that have been made in aeolian research on dust emission and management relative to that in fluvial research on sediment production. Literature searches highlight that aeolian processes are greatly understudied relative to fluvial processes when considering total erosion in different environmental settings. Notably, within the USA, aeolian research was triggered by the Dust Bowl catastrophe of the 1930s, but the resultant research agencies have shifted to almost completely focusing on fluvial processes, based on number of remaining research stations and on monetary investments in control measures. However, numerous research issues associated with intensification of land use and climate change impacts require a rapid ramping up in aeolian research that improves information about aeolian processes relative to fluvial processes, which could herald a post-Dust Bowl Phoenix phase in which aeolian processes are recognized as broadly critical to geo- and environmental sciences.

Whicker, Jeffrey J [Los Alamos National Laboratory; Field, Jason P [UNIV OF ARIZONA; Breshears, David D [UNIV OF ARIZONA

2008-01-01T23:59:59.000Z

285

ON THE PHYSICS OF GALVANIC SOURCE ELECTROMAGNETIC GEOPHYSICAL METHODS FOR TERRESTRIAL AND MARINE EXPLORATION  

SciTech Connect

A numerical study was conducted to investigate the governing physics of galvanic source electromagnetic (EM) methods for terrestrial and marine exploration scenarios. The terrestrial exploration scenario involves the grounded electric dipole source EM (GESTEM) method and the examination of how the GESTEM method can resolve a thin resistive layer representing underground gas and/or hydrocarbon storage. Numerical modeling studies demonstrate that the loop transient EM (TEM) and magnetotelluric (MT) methods are insensitive to a thin horizontal resistor at depth because they utilize horizontal currents. In contrast to these standard EM methods, the GESTEM method generates both vertical and horizontal transient currents. The vertical transient current interacts with a thin horizontal resistor and causes charge buildup on its surface. These charges produce a measurable perturbation in the surface electric field at early time. The degree of perturbation depends on source waveform. When the GESTEM method is energized with step-off waveform, the perturbation due to a thin horizontal resistor is small. This is because the step-off waveform mainly consists of low frequency signals. An alternative is taking the time-derivative of the step-off responses to approximate the impulse response which includes higher frequency signals. In order to improve degree of perturbation especially due to a localized small 3-D resistor, the diffusion angle of the vertical transient current, 45 should be considered to make vertical currents coupled to a resistive target efficiently. The major drawback of the GESTEM method lies in the fact that GESTEM sounding can not be interpreted using 1-D inversion schemes if there is near-surface inhomogeneity. The marine exploration scenario investigates the physics of marine frequency-domain controlled source EM (FDCSEM) and time-domain controlled source EM (TDCSEM) methods to explore resistive hydrocarbon reservoirs in marine environments. Unlike the marine MT (MMT) method, these two methods are very sensitive to a thin hydrocarbon reservoir at depth because their sources generate vertical as well as horizontal currents. As for the FDCSEM method, the normalized EM peak response occurs where the airwave starts to dominate the seafloor EM response in the background model. This point is a function of source frequency, seawater depth and seafloor resistivity. The peak magnitude of the normalized EM response depends on whether the high concentration of vertical currents can reach and interact with the reservoir effectively. Noise levels of the EM receivers are important factors for successful FDCSEM and TDCSEM survey design. The major benefit of using magnetic field responses over electric ones is that the noise level of magnetic receiver theoretically allows for greater surface coverage compared to that of the electric receiver. Like the GESTEM method, the TDCSEM method also requires the use of a proper transient EM pulse such that the relatively high frequencies are produced. The impulse response of the TDCSEM method is characterized by two-path diffusion of the EM signal. The initial response is caused by faster signal diffusion through the less conductive seafloor, while the later arrivals result from slower diffusion through the more conductive seawater. Therefore, at larger separations, the effects of the seafloor and seawater are separable. This can be useful in reducing the airwave problem associated with the FDCSEM method in shallow marine environments.

David Alumbaugh and Evan Um

2007-06-27T23:59:59.000Z

286

Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii  

E-Print Network (OSTI)

of Emile Okal on "Source of the great tsunami of 1 April 1946: a landslide in the upper Aleutian forearc

287

Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii  

E-Print Network (OSTI)

: A landslide in the upper Aleutian forearc, Mar. Geol., 203, 201-218. 19. Fryer, P., 2002, Recent studies, A field survey of the 1946 Aleutian tsunami in the far field, Seismological Res. Lett., 73, 490-503. 68

288

Optimisation of seismic network design: Application to a geophysical international lunar network  

E-Print Network (OSTI)

in Europe in winter, 20­30 ppb as widely reported [Derwent et al., 1998; Pochanart et al., 2001a; Donev et

Sambridge, Malcolm

289

Reprint -Proceedings 2009 International Pittsburgh Coal Conference 1 GEOPHYSICAL CHARACTERIZATION OF THE MARSHALL  

E-Print Network (OSTI)

Inc. Art Wells, MMV Team Leader, NETL, Pittsburgh Doug Patchen, Director Oil and Natural Gas of Environmental Protection Office of Oil and Gas. The impacts of CO2 injection into the center wells on the production and composition of the coalbed methane produced in the peripheral and overlying wells

Wilson, Thomas H.

290

Geophysical consequences of carbon dioxide generation by fossil fuels. [Melting of polar icecaps  

SciTech Connect

The recent National Academy of Sciences Report ''Energy and Climate'' asserts that the greenhouse effect of CO/sub 2/ generated by the burning of fossil fuels would increase the temperature of the earth by 11/sup 0/F. It is argued and calculations have been carried out to show that the principal effect is the complete melting of the polar icecaps in a few centuries; the resulting inundation of the populated land areas and the coastal cities of the world is even more disastrous. The calculated increase of temperature is only 1.4/sup 0/C.

Fong, P.

1978-01-01T23:59:59.000Z

291

2009 European Association of Geoscientists & Engineers 487 Near Surface Geophysics, 2009, 487-498  

E-Print Network (OSTI)

extend a short distance from the shore. Discontinuities in these patches of transmissive sediments can is useful as a rapid reconnaissance tool for mapping geologic heterogeneity. The results can be used can guide the placement of seepage meters. a fine grid is to make rapid reconnaissance measurements

Toran, Laura

292

Worth of Geophysical Data in Natural-Disaster-Insurance Rate Setting  

Science Conference Proceedings (OSTI)

Insurance firms that offer natural-disaster insurance base their rates on available information. The benefits from collecting additional data and incorporating this information to improve parameter estimates of probability distributions that are ...

E. D. Attanasi; M. R. Karlinger

1982-04-01T23:59:59.000Z

293

Design and Construction of an Affordable Rotating Table for Classroom Demonstrations of Geophysical Fluid Dynamics Principles  

Science Conference Proceedings (OSTI)

Rotating tables have been in use for many years because of their ability to demonstrate fluid dynamical phenomena, shedding insight on the sometimes complicated or esoteric mathematics used to describe such processes. A small team of students at ...

Brian D. McNoldy; Anning Cheng; Zachary A. Eitzen; Richard W. Moore; John Persing; Kevin Schaefer; Wayne H. Schubert

2003-12-01T23:59:59.000Z

294

Relations between tectonic zones of the Albanides on the basis of results of geophysical studies  

SciTech Connect

The Ablanides are located between the Dinarides of Yugoslavia and the Hellenides of Greece, which together form the southern branch of the Mediterranean Alpine Belt. Our analysis of the Albanides and their extension into the Adriatic Sea integrates surface geological observations, well data, and results of seismological, reflection-seismic, gravity, magnetic, and geoelectric surveys. Evolution of the Albandies began with the Triassic subsidence of their Hercynian substratum under a tensional regime, culminating in crustal separation and opening of the Hellenic-Dinaride oceanic basin. The internal Albanides (IA) formed part of the oceanic Hellenic-Dinaride Basin, whereas the external Albanides (EA) developed out of the westward adjacent passive margin and continental shelf of the Adriatic plate. This was accompanied by the development of a synorogenic foredeep basin. During the tectonic, tarditectonic, and neotectonic phases, progressive westward shift of the foredeep basin axis to its present location in the Adriatic. The EA evolved out of a shelf and continental margin sedimentary prism and a superimposed foredeep wedge, which together form the Alpine-deformed hydrocarbon-bearing Albanian Sedimentary Basin. Reflection-seismic and gravity surveys done in the EA and the Adriatic Sea define distinct structural belts related to different tectonic zones of the Albanian Sedimentary Basin. The most important oil and gas accumulations are found in the Jonian zone and in the Periadriatic depression. The carbonate-dominated Late Triassic to Late Cretaceous series of the lonian, Kruja, and Krasta-Cukali zones contains several rich source rock intervals. In the lonian zone, Late Cretaceous, Paleocene, and Eocene carbonates and oligocene-Miocene flysch-type sandstones form the reservoirs of the main oil and gas accumulations. The Tortonian-Pliocene Molasse-type clastics of the Periadriatic depression also contain source rocks and stratigraphically trapped gas accumulations.

Frasheri, A. (Polytechnic Univ., Tirana (Albania))

1993-09-01T23:59:59.000Z

295

Preclosure Monitoring and Performance Confirmation at Yucca Mountain: Applicability of Geophysical, Geohydrological, and Geochemical Methods  

E-Print Network (OSTI)

Repository, Vol. II: Tuff, NUREG/CR-4161 Gregory, A.R. ,Repository Performance, NUREG/CR-2547 (1982). Tsang, C. F

Tsang, C.F.

2010-01-01T23:59:59.000Z

296

Geologic and geophysical investigations of the Zuni-Bandera volcanic field, New Mexico  

DOE Green Energy (OSTI)

A positive, northeast-trending gravity anomaly, 90 km long and 30 km wide, extends southwest from the Zuni uplift, New Mexico. The Zuni-Bandera volcanic field, an alignment of 74 basaltic vents, is parallel to the eastern edge of the anomaly. Lavas display a bimodal distribution of tholeiitic and alkalic compositions, and were erupted over a period from 4 Myr to present. A residual gravity profile taken perpendicular to the major axis of the anomaly was analyzed using linear programming and ideal body theory to obtain bounds on the density contrast, depth, and minimum thickness of the gravity body. Two-dimensionality was assumed. The limiting case where the anomalous body reaches the surface gives 0.1 g/cm/sup 3/ as the greatest lower bound on the maximum density contrast. If 0.4 g/cm/sup 3/ is taken as the geologically reasonable upper limit on the maximum density contrast, the least upper bound on the depth of burial is 3.5 km and minimum thickness is 2 km. A shallow mafic intrusion, emplaced sometime before Laramide deformation, is proposed to account for the positive gravity anomaly. Analysis of a magnetotelluric survey suggests that the intrusion is not due to recent basaltic magma associated with the Zuni-Bandera volcanic field. This large basement structure has controlled the development of the volcanic field; vent orientations have changed somewhat through time, but the trend of the volcanic chain followed the edge of the basement structure. It has also exhibited some control on deformation of the sedimentary section.

Ander, M.E.; Heiken, G.; Eichelberger, J.; Laughlin, A.W.; Huestis, S.

1981-05-01T23:59:59.000Z

297

Preliminary geological and geophysical evaluation of the Castle Dome HDR geothermal prospect, Southwestern Arizona  

DOE Green Energy (OSTI)

The Castle Dome HDR geothermal prospect is located in Yuma County, Arizona, in a region centered about 80 km north of Yuma along US Rte. 95. The area of interest is broadly defined by a negative residual Bouguer gravity anomaly which is about 45 km across, steep-sided in many places, and as much as 30 mgals in magnitude. The geology of this Basin and Range area is poorly known, but the few published reports and current Los Alamos Scientific Laboratory (LASL) field studies indicate that the Castle Dome Mountains and adjacent ranges are chiefly a thick pile of welded ash-flow tuffs of probable mid-Tertiary age. The tuffs rest unconformably on Mesozoic metasedimentary rocks exposed only outside steep edges of the gravity low. This gravity anomaly may reflect the presence of a large caldera. A regional magnetotelluric study now in progress will define the depths to electrical conductors within the crust and upper mantle and contribute to understanding of crustal structure, the gravity anomaly, and the Hot Dry Rock (HDR) geothermal potential of the Castle Dome area.

Gutmann, J.T.; Aiken, C.L.V.; Ander, M.E.; Laney, R.T.

1980-01-01T23:59:59.000Z

298

Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation  

SciTech Connect

NH3 gas treatment of low water content sediments resulted in a significant decrease in aqueous and adsorbed uranium, which is attributed to incorporation into precipitates. Uranium associated with carbonates showed little change. Uranium associated with hydrous silicates such as Na-boltwoodite showed a significant decrease in mobility but no change in Na-boltwoodite concentration (by EXAFS/XANES), so is most likely caused by non-U precipitate coatings. Complex resistivity changes occurred in the sediment during NH3 and subsequent N2 gas injection, indicating ERT/IP could be used at field scale for injection monitoring.

Szecsody, James E.; Truex, Michael J.; Zhong, Lirong; Johnson, Timothy C.; Qafoku, Nikolla; Williams, Mark D.; Greenwood, William J.; Wallin, Erin L.; Bargar, John R.; Faurie, Danielle K.

2012-10-30T23:59:59.000Z

299

2006 Annual Report Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

being installed by PBO are borehole systems, which must be cali- brated in situ using theoretical models significant depar- tures from previous behavior. The vacuum control systems on the older instruments were vacancy forming substitution. The light gray spheres represent magne- sium (Mg) atoms, the light gray

Constable, Steve

300

Integrated Geologic and Geophysical Assessment of the Eileen Gas Hydrate Accumulation, North Slope, Alaska  

SciTech Connect

Using detailed analysis and interpretation of 2-D and 3-D seismic data, along with modeling and correlation of specially processed log data, a viable methodology has been developed for identifying sub-permafrost gas hydrate prospects within the Gas Hydrate Stability Zone (HSZ) and associated ''sub-hydrate'' free gas prospects in the Milne Point area of northern Alaska (Figure 1). The seismic data, in conjunction with modeling results from a related study, was used to characterize the conditions under which gas hydrate prospects can be delineated using conventional seismic data, and to analyze reservoir fluid properties. Monte Carlo style gas hydrate volumetric estimates using Crystal Ball{trademark} software to estimate expected in-place reserves shows that the identified prospects have considerable potential as gas resources. Future exploratory drilling in the Milne Point area should provide answers about the producibility of these shallow gas hydrates.

Timothy S. Collett; David J. Taylor; Warren F. Agena; Myung W. Lee; John J. Miller; Margarita Zyrianova

2005-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Experimental and Analytic Modeling of Piercement  

E-Print Network (OSTI)

(Fig. 3b) but not to any track. The Karoo, Ferrar and Tasman volcanics erupted 183 Myr ago, predating-depth below the Afar, 350 km-depth below the Siberian and Karoo traps, for which they suggest a chemical no traps under Central Africa. 5) The Karoo erupted within what is now the oceanic part of the African

Podladchikov, Yuri

302

NON-PARAMETRIC GEOPHYSICAL DATA INTEGRATION FOR REDUCING UNCERTAINTIES IN MULTIPLE POINT  

E-Print Network (OSTI)

, but when X-ray transmission information is obtained from a multitude of radiographic images, scanned-traditional porous media variables such as interfacial areas and common lines, the latter being the contact points techniques capable of resolving these variables. The ability to quantify phase interfaces and common lines

303

Hanohano: A Deep Ocean Anti-Neutrino Detector for Unique Neutrino Physics and Geophysics Studies  

E-Print Network (OSTI)

The science potential of a 10 kiloton deep-ocean liquid scintillation detector for ~1 MeV energy scale electron anti-neutrinos has been studied. Such an instrument, designed to be portable and function in the deep ocean (3-5 km) can make unique measurements of the anti-neutrinos from radioactive decays in the Earth'.s mantle. Ths information speaks to some of the most fundamental questions in geology about the origin of the Earth, plat e tectonics, the geomagnetic field and even somewhat indirectly to global warming. Measurements in multiple locations will strengthen the potential insights. On the particle physics side, we have identified a unique role in the study of anti-neutrinos from a nuclear power complex, at a range of 55-60 km off shore. Not only can precision measurements be made of most neutrino mixing parameters, including $\\theta_{13}$ (depending on magnitude), but the neutrino mass hierarchy can be determined in a method not heretofore discussed, and one which does not rely upon matter effects. This detector is under active study on paper, in the laboratory, and at sea. An interdisciplinary and international collaboration is in formation, and plans are in motion for a major proposal, to be followed by construction over several years.

John G. Learned; Stephen T. Dye; Sandip Pakvasa

2008-10-28T23:59:59.000Z

304

A GEOLOGICAL AND GEOPHYSICAL STUDY OF THE BACA GEOTHERMAL FIELD, VALLES CALDERA, NEW MEXICO  

E-Print Network (OSTI)

shales, sandstones, and limestones (this layer is probably a significant storage reservoir and may be a major production

Wilt, M.

2011-01-01T23:59:59.000Z

305

Geophysical Research Abstracts Vol. 13, EGU2011-9360-4, 2011  

E-Print Network (OSTI)

of cloudless shortwave solar spectra incident on horizontal, tilted, or tracking surfaces, Solar energy, vol irradiance database for worldwide solar heat gain and building cooling load calculations. Solar Energy, vol pyranometer calibrations, Journal of Solar Energy Engineering, V.124, 44-50,2002. Oumbe, A., Blanc, Ph

Paris-Sud XI, Université de

306

TECTONIC EVOLUTION OF SYRIA INTERPRETED FROM INTEGRATED GEOPHYSICAL AND GEOLOGICAL ANALYSIS  

E-Print Network (OSTI)

Figure 2.6: Examples of correlations between seismic reflection data and two-way incidence reflection of Industry, Damascus, Syrian Arab Republic. Sawaf, T., D. Al-Saad, A. Gebran, M. Barazangi, J.A. Best and T

307

Preclosure Monitoring and Performance Confirmation at Yucca Mountain: Applicability of Geophysical, Geohydrological, and Geochemical Methods  

E-Print Network (OSTI)

stage through post-decommissioning. In this paper we haveopera tion, and decommissioning of the repository, it is

Tsang, C.F.

2010-01-01T23:59:59.000Z

308

Improved extraction of hydrologic information from geophysical data through coupled hydrogeophysical inversion  

E-Print Network (OSTI)

Water Resources Research, doi:10.1029/2001WR001204. Yeh,Water Resources Research, 40, W05113, doi:10.1029/2003WR002557. Yeh,

Hinnell, A.C.

2010-01-01T23:59:59.000Z

309

Jerry M. Harris, Olusoga Martins Akintunde*, Tapan Mukerji and Jaime Urban, Department of Geophysics, Stanford University.  

E-Print Network (OSTI)

................................................................ 223 Figure 29 Mine Void and CoalBed Methane Wells in Indiana Base Realignment And Closure BTU British Thermal Unit CBM CoalBed Methane CCS Carbon Capture Department of Energy ECBM enhanced coal bed methane EIA Energy Information Agency EOR Enhanced Oil

Harris, Jerry M.

310

Global Population Distribution and Urban Land Use in Geophysical Parameter Space  

Science Conference Proceedings (OSTI)

The spatial distribution of human population on the land surface is a fundamental determinant of land-use impacts on Earth's ecosystems. Census enumerations and satellite-detected night lights provide two complementary, but distinct, ...

Christopher Small

2004-06-01T23:59:59.000Z

311

Bibliography of the geological and geophysical aspects of hot dry rock geothermal resources  

DOE Green Energy (OSTI)

This is the first issue of an annual compilation of references that are useful to the exploration, understanding and development of the hot dry rock geothermal resource.

Heiken, G.; Sayer, S.

1980-02-01T23:59:59.000Z

312

Geophysical reconnaissance of prospective geothermal areas on the Island of Hawaii using electrical methods  

DOE Green Energy (OSTI)

Resistivity data from several areas were compiled, analyzed, and interpreted in terms of possible geologic models. On the basis of this analysis alone, two areas have been ruled out for possible geothermal exploitation, two have been interpreted to have a moderate-temperature resource, and two have been interpreted to have a high-temperature resource. The two areas which have been ruled out are the Keaau and South Point areas. The Kawaihae area and the lower northwest rift zone of Hualalai appear to have anomalous resistivity structures which suggest a moderate-temperature resource in each of these areas. Finally, specific areas in the lower southwest and lower east rift zones of Kilaauea have been outlined as locations where high-temperature fluids may exist at depth.

Kauahikaua, J.; Mattice, M.

1981-12-01T23:59:59.000Z

313

A GEOLOGICAL AND GEOPHYSICAL STUDY OF THE BACA GEOTHERMAL FIELD, VALLES CALDERA, NEW MEXICO  

E-Print Network (OSTI)

of New Mexico, 1978e Geothermal demonstration plant--1975. Hydrologic testing geothermal test hole no. 2. Losof the ~lles Caldera geothermal system, New Mexico. Trans.

Wilt, M.

2011-01-01T23:59:59.000Z

314

Forecasting Annual Discharge of River Murray, Australia, from a Geophysical Model of ENSO  

Science Conference Proceedings (OSTI)

Annual discharge (Q) in the largest river system in Australia, the River Murray (including the extensive tributary network of the Darling River), is often inversely related to sea surface temperature (SST) anomalies in the eastern equatorial ...

H. J. Simpson; M. A. Cane; S. K. Lin; S. E. Zebiak; A. L. Herczeg

1993-02-01T23:59:59.000Z

315

Geophysical Prospecting, 2004, 52, 547557 Estimating the elastic parameters of anisotropic media using a joint  

E-Print Network (OSTI)

using a joint inversion of P-wave and SV-wave traveltime error R.J. Ferguson1 and M.K. Sen1,2 1, joint inversion of P and SV data is employed and, as pure SV data are relatively rare, the use of mode-converted (PSV) data to represent SV in the joint inversion is proposed. Analytic and synthetic examples are used

Ferguson, Robert J.

316

Bibliography, geophysical data locations, and well core listings for the Mississippi Interior Salt Basin  

Science Conference Proceedings (OSTI)

To date, comprehensive basin analysis and petroleum system modeling studies have not been performed on any of the basins in the northeastern Gulf of Mexico. Of these basins, the Mississippi Interior Salt Basin has been selected for study because it is the most petroliferous basin in the northeastern Gulf of Mexico, small- and medium-size companies are drilling the majority of the exploration wells. These companies do not have the resources to perform basin analysis or petroleum system modeling research studies nor do they have the resources to undertake elaborate information searches through the volumes of publicly available data at the universities, geological surveys, and regulatory agencies in the region. The Advanced Geologic Basin Analysis Program of the US Department of Energy provides an avenue for studying and evaluating sedimentary basins. This program is designed to improve the efficiency of the discovery of the nation`s remaining undiscovered oil resources by providing improved access to information available in the public domain and by increasing the amount of public information on domestic basins. This report provides the information obtained from Year 1 of this study of the Mississippi Interior Salt Basin. The work during Year 1 focused on inventorying the data files and records of the major information repositories in the northeastern Gulf of Mexico and making these inventories easily accessible in an electronic format.

NONE

1998-05-01T23:59:59.000Z

317

GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Postseismic Deformation following the 1991 Racha, Georgia  

E-Print Network (OSTI)

the 1991 Racha, Georgia Earthquake J. Podgorski, E.H. Hearn,1 S. McClusky,2 R. Reilinger,2 T. Taymaz and O recorded in the Caucasus Mountains. Approxi- mately three months after this thrust-faulting earth- quake that the effective viscosity of the lower crust in the western Greater Caucasus region exceeds 1018 Pa s. 1

Hearn, Elizabeth H.

318

A Proposed Definition for Vector Correlation in Geophysics: Theory and Application  

Science Conference Proceedings (OSTI)

A universally accepted definition for vector correlation in oceanography and meteorology does not presently exist. To address this need, a generalized correlation coefficient, originally proposed by Hooper and later expanded upon by Jupp and ...

D. S. Crosby; L. C. Breaker; W. H. Gemmill

1993-06-01T23:59:59.000Z

319

On the Mapping of Multivariate Geophysical Fields: Sensitivities to Size, Scales, and Dynamics  

Science Conference Proceedings (OSTI)

The effects of a priori parameters on the error subspace estimation and mapping methodology introduced by P. F. J. Lermusiaux et al. is investigated. The approach is three-dimensional, multivariate, and multiscale. The sensitivities of the ...

P. F. J. Lermusiaux

2002-10-01T23:59:59.000Z

320

Annales Geophysicae (2002) 20: 619628 c European Geophysical Society 2002 Geophysicae  

E-Print Network (OSTI)

that these slow flows are driven by mass and/or momentum transfer across the distant tail mag- netopause is explored. We establish that 40% of these flows could be driven by the transfer of approximately 4 The structure of the distant magnetotail plasma sheet (X

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

An edited version of this paper was published by AGU. Copyright 2002 American Geophysical Union.  

E-Print Network (OSTI)

the published open abstract, go to http://dx.doi.org and enter the DOI. #12;PDO_LIU_RV2,01/08/2002 1 Search. Citation: Liu, Z., L. Wu, R. Gallimore, and R. Jacob (2002), Search for the Origins of Pacific Decadal by extratropical- tropical oceanic teleconnection. Index Terms: Ocean/atmosphere interaction Key words: tropical

Wisconsin at Madison, University of

322

Preclosure Monitoring and Performance Confirmation at Yucca Mountain: Applicability of Geophysical, Geohydrological, and Geochemical Methods  

E-Print Network (OSTI)

Crilical Parameters Radionuclide Concentration Liquid/Gasin Table 1, includes radionuclide concentration, liquid/gasbe the means by which radionuclides could be transported to

Tsang, C.F.

2010-01-01T23:59:59.000Z

323

Highlights of the 2009 SEG summer research workshop on "CO2 Sequestration Geophysics"  

E-Print Network (OSTI)

groundwater, natural gas storage, waste disposal). Rock andfrom CO 2 EOR and natural gas storage projects, the risk of

Lumley, D.

2010-01-01T23:59:59.000Z

324

Recent Developments in Geology, Geochemistry and Geophysics Applied to Hydrothermal Reservoir Mapping and Monitoring  

DOE Green Energy (OSTI)

Progress in research and development of four of UURI's projects are reviewed in this paper. First, the development of chemical tracers has evolved to a field test in the Dixie Valley geothermal system in Nevada. Second, the measurement of in situ stress continues to demonstrate changes with location in the orientation of stress within active geothermal systems. Third, we continue to develop hydrologic models of geothermal systems based upon fluid inclusion measurements. Fourth, we are developing equipment that will allow testing of borehole to borehole and borehole to surface electrical resistivity techniques for locating fluid-filled fractures.

Moore, Joseph N.; Nielson, Dennis L.; Wright, Phillip M.

1989-03-21T23:59:59.000Z

325

Geophysical Evidence for the Availability of Geothermal Energy in New Britian  

DOE Green Energy (OSTI)

This paper combines some of the results and interpretations of geological mapping, seismic refraction, marine seismic, and gravity surveys to show that large tracts of New Britain could be favorable targets for geothermal power development. It is shown that the fractured and faulted lithosphere is associated with grabens and rifts in which mantle material has risen to within 10 to 15 km from the surface. The grabens and rifts are marked by volcanism in which the dominant volcanic rocks are olivine--and tholeiitic--basalts, with a sprinkling of more acid volcanics ranging from dacite to andesite. Following A. Rittman the basalts are believed to have originated in the asthenosphere when the lithosphere was broken up under a tensional stress regime; the acid volcanics were formed by magmatic differentiation within the crust. it was argued that ideal geothermal reservoirs are capped with altered ash deposits or other nonpermeable volcanics. To feed such reservoirs conduits are required which are naturally located on fault or shear zones. The two areas selected as favorable for future geothermal power development are located between Talasea and Lolobau Is., say around Hoskins; and near Rabaul, between Matupi Harbor and Matupi. As a type area, the rift between the Gazelle Peninsula and New Ireland resembles the Afar triangle, at the northern end of the Great Valley Rift system of Africa.

Wiebenga, W. A.; Furumoto, A. S.

1974-01-01T23:59:59.000Z

326

12.820 / 12.822 Turbulence in Geophysical Systems, Spring 2004  

E-Print Network (OSTI)

This course presents the phenomena, theory, and modeling of turbulence in the Earth's oceans and atmosphere. The scope ranges from the fine structure to planetary scale motions. The regimes of turbulence include homogeneous ...

Legg, Sonya

327

12.820 / 12.822 Turbulence in Geophysical Systems, Spring 2005  

E-Print Network (OSTI)

This course presents the phenomena, theory, and modeling of turbulence in the Earth's oceans and atmosphere. The scope ranges from the fine structure to planetary scale motions. The regimes of turbulence include homogeneous ...

Ferrari, Raffaele

328

Preclosure Monitoring and Performance Confirmation at Yucca Mountain: Applicability of Geophysical, Geohydrological, and Geochemical Methods  

E-Print Network (OSTI)

processes (e.g. , heat-pipe phenomena). Differences betweenity of such inflows. Also, heat pipe effects caused by the

Tsang, C.F.

2010-01-01T23:59:59.000Z

329

A geological and geophysical study of the Sergipe-Alagoas Basin  

E-Print Network (OSTI)

Extensional stresses caused Africa and South America to break up about 130 Million Years. When Africa rifted away from South America, a large onshore triple junction began at about 13 S and propagated northward. This triple junction failed and created the Reconcavo-Tucano-Jupato rift (R-T-J), located in northeastern Brazil (north of Salvador). The extensional stress that created this rift was caused by a change in the force acting on the plate during the Aptian. A series of offshore rifts also opened at this time, adjacent to the R-T-J rift; this series of basins are referred to as Jacuipe, Sergipe, and Alagoas (J-S-A). The basins are separated by bathymetric highs to the north and the south of the Sergipe-Alagoas basin. The Sergipe-Alagoas basin has a Bouguer gravity anomalies more negative than -35 mGal, and the other two basins have values more negative than -100 mGal; the total magnetic intensity is also about 60-80 nT higher in the Sergipe-Alagoas basin than the surrounding basins. The gravity and magnetic values in the Sergipe-Alagoas basin, when compared to the Jacuipe and the Sergipe-Alagoas basins, indicate that the depositional history and/or the formation of the Sergipe-Alagoas basin is different from the other two basins. This study was done by analyzing the gravity and magnetic anolamies in the region, and comparing these anomalies to the stratigraphy of the basin. This research has allowed the stratigraphy and structures of the Sergipe-Alagoas basin to be better understood - the location of the Sergipe fracture zone will also be outlined. This study provides a comprehensive view of the Sergipe-Alagoas basin and outlines a method for using Gravity and Magnetics to better understand the stratigraphy and structure of the Sergipe-Alagoas basin.

Melton, Bradley Douglas

2008-05-01T23:59:59.000Z

330

Retrieval of Geophysical Parameters from GOES: Evaluation of a Split-Window Technique  

Science Conference Proceedings (OSTI)

The performance of a physical split-window retrieval algorithm used to retrieve skin temperature (ST) and precipitable water (PW) from Geostationary Operational Environmental Satellites (GOES) infrared measurements is evaluated. The evaluation ...

Ronnie J. Suggs; Gary J. Jedlovec; Anthony R. Guillory

1998-10-01T23:59:59.000Z

331

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan  

E-Print Network (OSTI)

as methane clathrates or clathrate hydrates of natural gas, these substances are similar to ice accumulations of natural gas on Earth are in the form of gas hydrates (Collett, 1994) that occur mainly offshore water, concern over the potential hazard posed by gas hydrates has become an important issue. Chev- ron

Knapp, James Howard

332

Geophysical constraints on the surface distribution of authigenic carbonates across the Hydrate Ridge region,  

E-Print Network (OSTI)

car- bonate and gas hydrate buried by hemipelagic sediments. The similar nature of the category II nature of the conduits can only be speculated at this time. The important observation, however the shallow source of methane and water contained in subsurface and surface gas hydrates. The distribution

Goldfinger, Chris

333

A Feasibility Study of Non-Seismic Geophysical Methods for Monitoring Geologic CO2 Sequestration  

E-Print Network (OSTI)

Suggested Reading The electrical resistivity log as an aidare assumed. The electrical resistivity of reservoir rocksdescribe the electrical resistivity of sedimentary rocks as

Gasperikova, Erika; Hoversten, G. Michael

2006-01-01T23:59:59.000Z

334

Geophysical monitoring of foam used to deliver remediation treatments within the vadose zone  

E-Print Network (OSTI)

long electrode electrical resistivity. Journal of Applied1991. Hysteresis in the electrical resistivity of partiallyG.E. 1942. The electrical resistivity log as an aid in

Wu, Y.

2013-01-01T23:59:59.000Z

335

Preclosure Monitoring and Performance Confirmation at Yucca Mountain: Applicability of Geophysical, Geohydrological, and Geochemical Methods  

E-Print Network (OSTI)

and Monitoring Electrical Resistivity with Surface andthe pore fluid electrical resistivity (inverse of conduc

Tsang, C.F.

2010-01-01T23:59:59.000Z

336

Improved extraction of hydrologic information from geophysical data through coupled hydrogeophysical inversion  

E-Print Network (OSTI)

to radar and electrical resistivity tomograms: resolutionG.E. (1942), The electrical resistivity log as an aid inlapse surface electrical resistivity tomography, Journal of

Hinnell, A.C.

2010-01-01T23:59:59.000Z

337

LABORATORY FOR ATMOSPHERIC ACOUSTICS SCRIPPS INSTITUTION OF OCEANOGRAPHY INSTITUTE OF GEOPHYSICS & PLANETARY PHYSICS Pion Flat Observatory  

E-Print Network (OSTI)

original scientific research and engineering design at the forefront of their particular area. Expertise in problem-solving methodologies, including engineering design and structured decision

Constable, Steve

338

2006 Annual Report Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

. A fourth cycle in a more circular orbit yielded gravity data by Doppler tracking from Earth. Imagery charac the terrestrial dynamo. Gravity, Topography, and Strength. All variants of the standard model for Venus are made implausible by the relation- ship between gravity and topography. Venusian gravity, deter- mined by satellite

Constable, Steve

339

2006 Annual Report Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

engineering university. Designed to address the special linguistic needs of science and technology students XI during CSM's spring semester Engineering Days (E-Days). The fair is designed to give graduate and conducted by the International Student Organization. It includes exhibits and programs designed to further

Constable, Steve

340

Highlights of the 2009 SEG summer research workshop on "CO2 Sequestration Geophysics"  

E-Print Network (OSTI)

colleague Partha Routh (ExxonMobil) for his contributions toSmith (Woodside); Partha Routh (ExxonMobil); Don Sherlock (

Lumley, D.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Preliminary petrographic and geophysical interpretations of the exploratory geothermal drill hole and core, Redstone, New Hampshire  

DOE Green Energy (OSTI)

A 3000 foot diamond drill hole was drilled in the Conway Granite in Redstone, New Hampshire. A comprehensive detailed petrographic and physical study of this core was made. The purpose of this study is to supply a sound data base for future geothermal and uranium-thorium studies of the drill core. An estimate of the heat flow potential of the Redstone drill hole gives a heat flow of 1.9 HFU. If only the red phase of the Conway Granite had been intersected the heat flow may have been as much as 2.7 HFU, reaching a temperature of 260/sup 0/C at 6 km. The drill hole intersected four lithologies; the green and red phase of the Conway Granite, the Albany quartz syenite and a medium-grained, hastingsite-biotite granite. The red phase has the highest and most irregular radioactivity. The irregularity is mainly due to minor variations in lithology. The drill core intersected several alteration zones up to a thickness of 150 feet. These alteration zones represent passage of low to medium temperature fluids which might have been mineralized. The Conway Granite has the physical and chemical characteristics necessary for the formation of vein type uranium deposits. The presence of unexplained radiometric anomalies lends support to the existence of such deposits.

Hoag, R.B. Jr.; Stewart, G.W.

1977-06-30T23:59:59.000Z

342

Geophysical parameter estimation with a passive microwave spectrometer at 54 / 118 / 183 / 425 GHz  

E-Print Network (OSTI)

(cont.) model of a convective cell is presented that provides a physical basis for this relationship.

Leslie, Robert Vincent, 1972-

2004-01-01T23:59:59.000Z

343

Transit-Time and Tracer-Age Distributions in Geophysical Flows  

Science Conference Proceedings (OSTI)

Transport in the atmosphere and in the ocean is the result of the complex action of time-dependent and often highly turbulent flow. A useful diagnostic that summarizes the rate at which fluid elements are transported from some region to a point (...

Mark Holzer; Timothy M. Hall

2000-11-01T23:59:59.000Z

344

Geophysical monitoring of foam used to deliver remediation treatments within the vadose zone  

E-Print Network (OSTI)

transport in the hanford sediments under hyperalkalinethe Department of Energy (DOE) Hanford site, WA. A centralThe Department of Energy (DOE) Hanford site and elsewhere (

Wu, Y.

2013-01-01T23:59:59.000Z

345

Joint inversion of geophysical and hydrological data for improved subsurface characterization  

E-Print Network (OSTI)

Department of Energy (DOE) Hanford site in Washington aslocations at the U.S. DOE Hanford 200 East site (Sisson andduring water injection at Hanford site include (a) water

Kowalsky, Michael B.; Chen, Jinsong; Hubbard, Susan S.

2006-01-01T23:59:59.000Z

346

Earth Sciences Division Research Summaries 2006-2007  

E-Print Network (OSTI)

of geologic carbon sequestration. LBNL-58885. 8thC. M. , Geologic carbon sequestration: CO 2 trans- port infrom geologic carbon sequestration sites: Unsaturated zone

DePaolo, Donald

2008-01-01T23:59:59.000Z

347

u.s. DEPARTMENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and classroom training and informational programs). If you move forward with activities thai are not authorized for federal funding by thc DOE Contracting Officer in advance of the...

348

Pennsylvania's 6th congressional district: Energy Resources ...  

Open Energy Info (EERE)

Inc Registered Financial Organizations in Pennsylvania's 6th congressional district EnerTech Capital Retrieved from "http:en.openei.orgwindex.php?titlePennsylvania%27s6thc...

349

Geothermal Reservoir Dynamics - TOUGHREACT  

E-Print Network (OSTI)

Swelling in a Fractured Geothermal Reservoir, presented atTHC) Modeling Based on Geothermal Field Data, Geothermics,and Silica Scaling in Geothermal Production-Injection Wells

2005-01-01T23:59:59.000Z

350

Marine geophysical study of cyclic sedimentation and shallow sill intrusion in the floor of the Central Gulf of California  

E-Print Network (OSTI)

heterogeneity of the Aleutian margin (1965-4822 m), Progressforaminifera from the Aleutian Margin and the Southern

Kluesner, Jared W.

2011-01-01T23:59:59.000Z

351

October 16, 2003 21:5 Geophysical Journal International GJI2048 Geophys. J. Int. (2003) 155, 411421  

E-Print Network (OSTI)

between data and post- experimental model parameter uncertainties (Box & Lucas 1959; Atkinson & Donev 1992 the more accurate the results are likely to be (Johnson & Leone 1977; Squires 1985; Atkinson & Donev 1992; Atkinson & Donev 1992; Chaloner & Verdinelli 1995; Curtis & Spencer 1999): () = M (, m)(m) dm. (3

352

Evaluation of airborne geophysical surveys for large-scale mapping of contaminated mine pools: draft final report  

SciTech Connect

Decades of underground coal mining has left about 5,000 square miles of abandoned mine workings that are rapidly filling with water. The water quality of mine pools is often poor; environmental regulatory agencies are concerned because water from mine pools could contaminate diminishing surface and groundwater supplies. Mine pools are also a threat to the safety of current mining operations. Conversely, mine pools are a large, untapped water resource that, with treatment, could be used for a variety of industrial purposes. Others have proposed using mine pools in conjunction with heat pumps as a source of heating and cooling for large industrial facilities. The management or use of mine pool water requires accurate maps of mine pools. West Virginia University has predicted the likely location and volume of mine pools in the Pittsburgh Coalbed using existing mine maps, structure contour maps, and measured mine pool elevations. Unfortunately, mine maps only reflect conditions at the time of mining, are not available for all mines, and do not always denote the maximum extent of mining. Since 1999, the National Energy Technology Laboratory (NETL) has been evaluating helicopter-borne, electromagnetic sensing technologies for the detection and mapping of mine pools. Frequency domain electromagnetic sensors are able to detect shallow mine pools (depth < 50 m) if there is sufficient contrast between the conductance of the mine pool and the conductance of the overburden. The mine pools (conductors) most confidently detected by this technology are overlain by thick, resistive sandstone layers. In 2003, a helicopter time domain electromagnetic sensor was applied to mined areas in southwestern Virginia in an attempt to increase the depth of mine pool detection. This study failed because the mine pool targets were thin and not very conductive. Also, large areas of the surveys were degraded or made unusable by excessive amounts of cultural electromagnetic noise that obscured the subtle mine pool anomalies. However, post-survey modeling suggested that thicker, more conductive mine pools might be detected at a more suitable location. The current study sought to identify the best time domain electromagnetic sensor for detecting mine pools and to test it in an area where the mine pools are thicker and more conductive that those in southwestern Virginia. After a careful comparison of all airborne time domain electromagnetic sensors (including both helicopter and fixed-wing systems), the SkyTEM system from Denmark was determined to be the best technology for this application. Whereas most airborne time domain electromagnetic systems were developed to find large, deep, highly conductive mineral deposits, the SkyTEM system is designed for groundwater exploration studies, an application similar to mine pool detection.

Geosciences Division, National Energy Technology Laboratory, US Department of Energy, Pittsburgh, PA; Hammack, R.W.

2006-12-28T23:59:59.000Z

353

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

Philippine Sea Experiment Over the past year I have been partipating in the planning for a new ocean acoustic in the Philippine Sea starting in 2009 and ending in 2011. The experiment takes place in a challenging and dynamic

Constable, Steve

354

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

- ing Philippine Sea Experiment Over the past year I have been partipating in an ocean acoustic in the Philippine Sea starting in 2009 and ending in 2011. This location is in a chal- lenging and dynamic part

Constable, Steve

355

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

deployment June 2007 Miller Seahurst, Puget Sound 1 day Scientist 34 ASG Kauai Acoustic SeaGlider August 2006 Napoli Explorer Kauai 2 days Scientist 33 ASG MB06 Acoustic SeaGlider August 2006 John Martin Montague Philippine Sea 14 days Scientist 31 NPAL LOAPEX September 2004 Melville North Pacific 30 day Scientist #12

Constable, Steve

356

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

a direct hit on the island of Kauai. Over a period of only three hours, the category-3 hurricane caused for relatively rare central Pacific hurricanes. Although Kauai has been impacted by three hurricanes since have arisen; such as "the volcanoes protect us," "only Kauai gets hit," or "there is no Hawaiian word

Constable, Steve

357

GEOPHYSICS, VOL. 67, NO. 6 (NOVEMBER-DECEMBER 2002); P. 19912004, 15 FIGS. 10.1190/1.1527099  

E-Print Network (OSTI)

, this information remains largely unexploited in oil and gas exploration. We present a method, called the multi correction needed in oil and gas exploration (e.g., Mari, 1984; Marsden, 1993). This need has grown in and around gas clouds (e.g., Zhu et al., 1999) and beneath high-velocity layers (e.g., Purnell, 1992

Ritzwolle, Mike

358

Geological-geophysical evaluation of the Hot Springs area, Bath County, Virginia. Progress report, June 1, 1975--February 29, 1976  

DOE Green Energy (OSTI)

In the northwestern part of Virginia and adjacent parts of West Virginia there are approximately 100 springs that have temperatures ranging from slightly above the mean air temperature (9 to 12/sup 0/C) to about 41/sup 0/C. A study was made to evaluate the geothermal resource potential of the area in the vicinity of the Warm Springs anticline in Bath and Allegheny Counties, Virginia. Phase I of the study is the compilation of a geologic map based on published maps and supported by reconnaissance and detailed geologic mapping in areas where published maps are not available. Phase II consists of a regional bipole-dipole electrical resistivity survey made in order to detect the presence of resistivity lows that might be associated with a geothermal system at depth. Phase III will include drilling a single hole to a depth of approximately 300 m with the hope of obtaining a heat flow value that is representative of the region. (LBS)

Costain, J.K.

1975-12-01T23:59:59.000Z

359

Geophysical well logging operations and log analysis in Geothermal Well Desert Peak No. B-23-1  

DOE Green Energy (OSTI)

Geothermal Well Desert Peak No. B-23-1 was logged by Dresser Atlas during April/May 1979 to a total depth of 2939 m (9642 ft). A temperature of 209/sup 0/C (408/sup 0/F) was observed on the maximum thermometer run with one of the logging tools. Borehole tools rated to a maximum temperature of 204.4/sup 0/C (400/sup 0/F) were utilized for logging except for the Densilog tool, which was from the other set of borehole instruments, rated to a still higher temperature, i.e., 260/sup 0/C (500/sup 0/F). The quality of the logs recorded and the environmental effects on the log response have been considered. The log response in the unusual lithologies of igneous and metamorphic formations encountered in this well could be correlated with the drill cutting data. An empirical, statistical log interpretation approach has made it possible to obtain meaningful information on the rocks penetrated. Various crossplots/histograms of the corrected log data have been generated on the computer. These are found to provide good resolution between the lithological units in the rock sequence. The crossplotting techniques and the statistical approach were combined with the drill cutting descriptions in order to arrive at the lithological characteristics. The results of log analysis and recommendations for logging of future wells have been included.

Sethi, D.K.; Fertl, W.H.

1980-03-01T23:59:59.000Z

360

First Three Years of the Microwave Radiometer aboard Envisat: In-Flight Calibration, Processing, and Validation of the Geophysical Products  

Science Conference Proceedings (OSTI)

The Envisat microwave radiometer is designed to correct the satellite altimeter data for the excess path delay resulting from tropospheric humidity. Neural networks have been used to formulate the inversion algorithm to retrieve this quantity ...

E. Obligis; L. Eymard; N. Tran; S. Labroue; P. Femenias

2006-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

GEOPHYSICS, VOL. 69, NO. 6 (NOVEMBER-DECEMBER 2004); P. 14701477, 9 FIGS. 10.1190/1.1836820  

E-Print Network (OSTI)

of a hydraulic fracture treatment in a tight gas-sand reservoir in east Texas. Hydraulic-fracture induced of productive, tight-gas sands interbedded with mudstones. The Cotton Valley and Travis Peak are believed sands and trend sub- parallel to the expected hydraulic fracture orientation (maximum horizontal stress

Torres-Verdín, Carlos

362

GEOPHYSICS, VOL. 68, NO. 2 (MARCH-APRIL 2003); P. 441452, 16 FIGS., 2 TABLES. 10.1190/1.1567214  

E-Print Network (OSTI)

and Application on Tight Sands Explo- ration wavelength of shear waves in their study). A case study with PS VSP imaging, particularly for tight sand1 #12;SHEAR-WAVE SOURCED 3-D VSP IMAGING OF TIGHT-GAS SANDSTONES IN RULISON FIELD, COLORADO

363

GEOPHYSICS, VOL. 63, NO. 3 (MAY-JUNE 1998); P. 816825, 10 FIGS. Marine magnetotellurics for petroleum exploration  

E-Print Network (OSTI)

Drive, Austin, TX 78759. E-mail: 73321.3045@compuserve.com. Lawrence Berkeley Laboratory, University buried salt, carbonate, and volcanic horizons that efficiently reflect and scatter acoustic energy

Constable, Steve

364

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

., Parker fiberoptics, Zumberge fluid mechanics, Ireley geodesy, Agnew, Fang, Fialko, Sasagawa geodynamics landscape systems, Werner lidar, Kent lunar magnetism and seismology, Johnson marine electromagnetic-PBO instruments with opera- tion supported as part of PBO. The first PBO instrument was a second system at DHL

Constable, Steve

365

WEST COAST REGIONAL CARBON SEQUESTRATION PARTNERSHIP - REPORT ON GEOPHYSICAL TECHNIQUES FOR MONITORING CO2 MOVEMENT DURING SEQUESTRATION  

E-Print Network (OSTI)

reservoir). Locations of injection wells are shown by blackis 1.2 %. Location of injection wells are shown by black2 injection with an injection well at (0,0) and a production

Gasperikova, Erika

2005-01-01T23:59:59.000Z

366

Lithology identification of aquifers from geophysical well logs and fuzzy logic analysis: Shui-Lin Area, Taiwan  

Science Conference Proceedings (OSTI)

The purpose of this study is to construct a fuzzy lithology system from well logs to identify formation lithology of a groundwater aquifer system in order to better apply conventional well logging interpretation in hydro-geologic studies because well ... Keywords: Aquifer characterization, Artificial intelligence, Groundwater, Hydrogeology, Soft computing

Bieng-Zih Hsieh; Charles Lewis; Zsay-Shing Lin

2005-04-01T23:59:59.000Z

368

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The signature of the stratospheric Brewer-Dobson1  

E-Print Network (OSTI)

are associated with6 increased cloud incidence in the tropical tropopause transition layer (TTL)7 juxtaposed of the atmosphere: the tropical tropopause transition39 layer (TTL) and the Arctic troposphere.40 Clouds play a central role in the climate of both the TTL and Arctic troposphere. The41 TTL extends from roughly

369

Final Report: Improved Site Characterization And Storage Prediction Through Stochastic Inversion Of Time-Lapse Geophysical And Geochemical Data  

SciTech Connect

During the last months of this project, our project activities have concentrated on four areas: (1) performing a stochastic inversion of pattern 16 seismic data to deduce reservoir bulk/shear moduli and density; the need for this inversion was not anticipated in the original scope of work, (2) performing a stochastic inversion of pattern 16 seismic data to deduce reservoir porosity and permeability, (3) complete the software needed to perform geochemical inversions and (4) use the software to perform stochastic inversion of aqueous chemistry data to deduce mineral volume fractions. This report builds on work described in progress reports previously submitted (Ramirez et al., 2009, 2010, 2011 - reports fulfilled the requirements of deliverables D1-D4) and fulfills deliverable D5: Field-based single-pattern simulations work product. The main challenge with our stochastic inversion approach is its large computational expense, even for single reservoir patterns. We dedicated a significant level of effort to improve computational efficiency but inversions involving multiple patterns were still intractable by project's end. As a result, we were unable to fulfill Deliverable D6: Field-based multi-pattern simulations work product.

Ramirez, A; Mcnab, W; Hao, Y; White, D; Johnson, J

2011-04-14T23:59:59.000Z

370

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103,NO. C7, PAGES 14,261-14,290,JUNE 29, 1998 ENSO theory  

E-Print Network (OSTI)

by severalof the above studies. These are referred to as the quasi-quadrennial or low-frequency peak by Moore and Philander [1977];CaneandSarachik[1983];McCreary[1985]for reviews)and hasbeenextendedduringthe TOGA pe- riod. We review this theory with emphasison relevance to low-frequencymotionssuchas occur

Battisti, David

371

Modeling the resolution of inexpensive, novel non-seismic geophysical monitoring tools to monitor CO2 injection into coal beds  

E-Print Network (OSTI)

of CO 2 enhanced coal bed methane (CBM) production. TheNIST Re Rx S Tx Coal Bed Methane Carbon dioxide ElectricCoal Beds as a part of the report on Stored CO 2 and Methane

Gasperikova, E.

2010-01-01T23:59:59.000Z

372

A Geophysical Characterization & Monitoring Strategy for Determining Hydrologic Processes in the Hyporheic Corridor at the Hanford 300-Area  

SciTech Connect

The primary objective of this research was to advance the prediction of solute transport between the Uranium contaminated Hanford aquifer and the Columbia River at the Hanford 300 Area by improving understanding of how fluctuations in river stage, combined with subsurface heterogeneity, impart spatiotemporal complexity to solute exchange along the Columbia River corridor. Our work explored the use of continuous waterborne electrical imaging (CWEI), in conjunction with fiber-optic distributed temperature sensor (FO-DTS) and time-lapse resistivity monitoring, to improve the conceptual model for how groundwater/surface water exchange regulates uranium transport. We also investigated how resistivity and induced polarization can be used to generate spatially rich estimates of the variation in depth to the Hanford-Ringold (H-R) contact between the river and the 300 Area Integrated Field Research Challenge (IFRC) site. Inversion of the CWEI datasets (a data rich survey containing {approx}60,000 measurements) provided predictions of the distributions of electrical resistivity and polarizability, from which the spatial complexity of the primary hydrogeologic units along the river corridor was reconstructed. Variation in the depth to the interface between the overlying coarse-grained, high permeability Hanford Formation and the underlying finer-grained, less permeable Ringold Formation, an important contact that limits vertical migration of contaminants, has been resolved along {approx}3 km of the river corridor centered on the IFRC site in the Hanford 300 Area. Spatial variability in the thickness of the Hanford Formation captured in the CWEI datasets indicates that previous studies based on borehole projections and drive-point and multi-level sampling likely overestimate the contributing area for uranium exchange within the Columbia River at the Hanford 300 Area. Resistivity and induced polarization imaging between the river and the 300 Area IFRC further imaged spatial variability in the depth to the Hanford-Ringold inland over a critical region where borehole information is absent, identifying evidence for a continuous depression in the H-R contact between the IFRC and the river corridor. Strong natural contrasts in temperature and specific conductance of river water compared to groundwater at this site, along with periodic river stage fluctuations driven by dam operations, were exploited to yield new insights into the dynamics of groundwater-surface water interaction. Whereas FO-DTS datasets have provided meter-scale measurements of focused groundwater discharge at the riverbed along the corridor, continuous resistivity monitoring has non-invasively imaged spatiotemporal variation in the resistivity inland driven by river stage fluctuations. Time series and time-frequency analysis of FO-DTS and 3D resistivity datasets has provided insights into the role of forcing variables, primarily daily dam operations, in regulating the occurrence of focused exchange at the riverbed and its extension inland. High amplitudes in the DTS and 3D resistivity signals for long periods that dominate the stage time series identify regions along the corridor where stage-driven exchange is preferentially focused. Our work has demonstrated how time-series analysis of both time-lapse resistivity and DTS datasets, in conjunction with resistivity/IP imaging of lithology, can improve understanding of groundwater-surface water exchange along river corridors, offering unique opportunities to connect stage-driven groundwater discharge observed with DTS on the riverbed to stage-driven groundwater and solute fluctuations captured with resistivity inland.

Slater, Lee; Day-Lewis, Frederick; Lane, John; Versteeg, Roelof; Ward, Anderson; Binley, Andrew; Johnson, Timothy; Ntarlagiannis, Dimitrios

2011-08-31T23:59:59.000Z

373

Geophysical and geochemical characterization of the groundwater system and the role of Chatham Fault in groundwater movement  

E-Print Network (OSTI)

legislature initiated a moratorium on uranium mining in Virginia (Legislative bill number §45.1-283). Marline Fault in groundwater movement at the Coles Hill uranium deposit, Virginia, USA John P. Gannon & Thomas J. Burbey & Robert J. Bodnar & Joseph Aylor Abstract The largest undeveloped uranium deposit in the United

Houser, Paul R.

374

GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Strong evidence of surface tension reduction in microscopic  

E-Print Network (OSTI)

%, J. Geophys. Res.-Atmos., 113(D3), 1­17, doi:10.1029/2007JD008590. Li, Z., A. Williams, and M. RoodCl was dissolved in ultrapure water (resistivity 18.2 M cm) and used in a constant-output atomizer (TSI, model of these values, we have assumed is that of pure water (72 mJ m-2 ). If, instead, we assume is reduced

Nenes, Athanasios

375

Thermal springs list for the United States; National Oceanic and Atmospheric Administration Key to Geophysical Records Documentation No. 12  

DOE Green Energy (OSTI)

The compilation has 1702 thermal spring locations in 23 of the 50 States, arranged alphabetically by State (Postal Service abbreviation) and degrees of latitude and longitude within the State. It shows spring name, surface temperature in degrees Fahrenheit and degrees Celsius; USGS Professional Paper 492 number, USGS Circular 790 number, NOAA number, north to south on each degree of latitude and longitude of the listed. USGS 1:250,000-scale (AMS) map; and the USGS topographic map coverage, 1:63360- or 1:62500-scale (15-minute) or 1:24000-scale (7.5-minute) quadrangle also included is an alphabetized list showing only the spring name and the State in which it is located. Unnamed springs are omitted. The list includes natural surface hydrothermal features: springs, pools, mud pots, mud volcanoes, geysers, fumaroles, and steam vents at temperature of 20{sup 0}C (68[sup 0}F) or greater. It does not include wells or mines, except at sites where they supplement or replace natural vents presently or recently active, or, in some places, where orifices are not distinguishable as natural or artificial. The listed springs are located on the USGS 1:250,000 (AMS) topographic maps. (MHR)

Berry, G.W.; Grim, P.J.; Ikelman, J.A. (comps.)

1980-06-01T23:59:59.000Z

376

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Continental constriction and oceanic ice-cover1  

E-Print Network (OSTI)

ice-cover1 thickness in a Snowball-Earth scenario2 Eli Tziperman, 1 Dorian S. Abbot, 2 Yosef Ashkenazy and Planetary D R A F T March 12, 2012, 6:36pm D R A F T #12;X - 2 TZIPERMAN ET AL.: CONTINENTS AND SNOWBALL ICE FLOW Abstract. Ice flow over a Snowball ocean was shown in recent years to3 be capable of very

Ashkenazy, Yossi "Yosef"

377

GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 23, PAGES 3925-3928, DECEMBER 1, 2000 Measuring Postglacial Rebound with GPS and  

E-Print Network (OSTI)

with post- glacial rebound (PGR) depends upon both the viscosity pro- file of the Earth and the ice loading parameterizes the Earth's viscosity structure. Hence by measuring rates of crustal deformation in a region a seasonal signal. The phase and amplitude of the seasonal signature in t

Larson, Kristine

378

Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics scripps institution of oceanography, university of california, san diego  

E-Print Network (OSTI)

1 13 7 1 5 Mineral & Energy Economics 73 14 57 2 41 11 13 18 Electrical Engineering & Computer Economics and Business 8 30 7 19 5 2 11 Mineral & Energy Economics 44 26 3 15 5 1 9 Operations Research Japan 10 0 10 7 0 7 Spain 2 0 2 3 2 1 Burma 1 0 1 0 0 0 Jordan 0 0 0 0 0 0 Sri Lanka 1 0 1 1 0 1

Constable, Steve

379

Geophysical and sedimentological assessment of urban impacts in a Lake Ontario watershed and lagoon: Frenchman's Bay, Pickering, Ontario.  

E-Print Network (OSTI)

levels. At these times, river flow is dependent on surface water contributions from surrounding streets reaches of Amberlea Creek below Bayly Street but are deeply buried by younger glacial sediments elsewhere and results in its characteristic muddy brown colour (Figure 11D). In turn, suspended sediment reduces light

McMaster University

380

ENCYCLOPEDIA OF SOLID EARTH GEOPHYSICS, SPRINGER, DOI:10.1007/978-90-481-8702-7, 2011 Mantle plumes  

E-Print Network (OSTI)

at the dust source, changed intensity of the atmospheric flow or to changed scavenging parameters. Furthermore supported by funding agencies in Denmark (SNF), Belgium (FNRS-CFB), France (IFRTP and INSU/CNRS), Ger-5 many.: Oxygen isotope and palaeotem- perature records from six Greenland ice-core stations: Camp Century, Dye-3

Farnetani, Cinzia G.

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Nonlinear Processes in Geophysics (2004) 11: 137151 SRef-ID: 1607-7946/npg/2004-11-137 Nonlinear Processes  

E-Print Network (OSTI)

in June, 1988 (Miltenberger et al., #12;LIQUID EFFLUENTS 6 - 4 1997 BNL Site Environmental Report Table 6

Paris-Sud XI, Université de

382

Modeling the resolution of inexpensive, novel non-seismic geophysical monitoring tools to monitor CO2 injection into coal beds  

E-Print Network (OSTI)

Plasynski, S. , 2008, Advancing Coal-Based Power Generationto monitor CO 2 injection into Coal Beds as a part of theanalysis for CO 2 movement in coal beds was based on the

Gasperikova, E.

2010-01-01T23:59:59.000Z

383

Geophysical wavelet library: Applications of the continuous wavelet transform to the polarization and dispersion analysis of signals  

Science Conference Proceedings (OSTI)

In the present paper, we consider and summarize applications of the continuous wavelet transform to 2C and 3C polarization analysis and filtering, modeling the dispersed and attenuated wave propagation in the time-frequency domain, and estimation of ... Keywords: Continuous wavelet transform, Dispersion, MATLAB, Polarization, Signal processing

M. Kulesh; M. Holschneider; M. S. Diallo

2008-12-01T23:59:59.000Z

384

Adaption of the Magnetometer Towed Array geophysical system to meet Department of Energy needs for hazardous waste site characterization  

SciTech Connect

This report documents US Department of Energy (DOE)-funded activities that have adapted the US Navy`s Surface Towed Ordnance Locator System (STOLS) to meet DOE needs for a ``... better, faster, safer and cheaper ...`` system for characterizing inactive hazardous waste sites. These activities were undertaken by Sandia National Laboratories (Sandia), the Naval Research Laboratory, Geo-Centers Inc., New Mexico State University and others under the title of the Magnetometer Towed Array (MTA).

Cochran, J.R. [Sandia National Labs., Albuquerque, NM (United States); McDonald, J.R. [Naval Research Lab., Washington, DC (United States); Russell, R.J. [Geo-Centers, Inc., Newton, MA (United States); Robertson, R. [Hughes Associates, Inc., Washington, DC (United States); Hensel, E. [New Mexico State Univ., Las Cruces, NM (United States). Dept. of Mechanical Engineering

1995-10-01T23:59:59.000Z

385

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The response of the North American Monsoon to1  

E-Print Network (OSTI)

Monsoon to1 increased greenhouse gas forcing2 B. I. Cook, 1,2 R. Seager, 2 1 NASA Goddard Institute A F T #12;X - 2 COOK ET AL.: NA MONSOON AND CLIMATE CHANGE Abstract. We analyze the response of the North American Monsoon (NAM)3 to increased greenhouse gas (GHG) forcing (emissions scenario RCP 8.5) us

386

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The vertical cloud structure of the West African monsoon  

E-Print Network (OSTI)

of the West African monsoon: A four-year climatology using CloudSat and CALIPSO T. H. M. Stein,1 D. J. Parker Abstract. The West African summer monsoon (WAM) is an important driver of the global climate and locally. Introduction The West African summer monsoon (WAM) controls the climate of the countries of sub-Saharan West

Hogan, Robin

387

Convergence of a two-layer scheme for equations of gas dynamics in Eulerian variables with geo-physical applications  

Science Conference Proceedings (OSTI)

This paper deals with the convergence of a completely conservative, two-layer difference scheme for equations of gas dynamics in Eulerian variables. The convergence of the difference solution to the smooth solution of the original periodic Cauchy problem ... Keywords: Cauchy problem, Eulerian variables, difference scheme, partial differential equations, shallow water theory

F. Criado-Aldeanueva; F. Criado; G. Meladze

2009-03-01T23:59:59.000Z

388

Nonlinear Processes in Geophysics (2005) 12: 163170 SRef-ID: 1607-7946/npg/2005-12-163  

E-Print Network (OSTI)

Academy of Sciences, 1 Alexidze str, 0193, Tbilisi, Georgia 2Tbilisi State University, 1 Chavchavadze Ave, Tbilisi, Georgia Received: 9 August 2004 ­ Revised: 19 November 2004 ­ Accepted: 6 January 2005

Paris-Sud XI, Université de

389

Nonlinear Processes in Geophysics (2005) 12: 139148 SRef-ID: 1607-7946/npg/2005-12-139  

E-Print Network (OSTI)

-consistent theory of nearly incompressible fluid dynamics for non-magnetized hydrodynamics as well as magnetofluids passive con- vection and the low frequency generation of sound. Thus, the NI fluid models, unlike fully (hydrodynamic) fluid admits two invariants (con- stants of motion), namely the energy and the mean squared

Paris-Sud XI, Université de

390

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The sea-surface structure of North Brazil Current  

E-Print Network (OSTI)

Brazil Current Rings derived from shipboard and moored ADCP observations G. P. Castel~ao Division Atlantic, the North Brazil Current retroflec- tion periodically sheds large anticyclonic rings, which then propagate north- westward. Between 1998­2000, the North Brazil Current Rings Experiment sampled a large

Miami, University of

391

Solar-Geophysical Data Number 537, May 1989. Part 1 (prompt reports). Data for April, March 1989, and late data  

Science Conference Proceedings (OSTI)

Solar data are presented for March and April, 1989. The data include sunspot activity indices; solar flares in the H-alpha line; solar radio emissions at 3, 10, 21, and 43 cm; and mean solar magnetic fields.

Coffey, H.E.

1987-07-01T23:59:59.000Z

392

Solar-Geophysical Data Number 537, May 1989. Part 2 (comprehensive reports). Data for November 1988 and miscellaneous  

Science Conference Proceedings (OSTI)

Solar data are presented for November 1988. The data include solar flares in the H-alpha line; solar radio bursts at fixed frequencies; interplanetary solar particles and plasma; solar x-ray radiation as seen from the GOES-7 artificial satellite; mass ejections from the sun; and active prominences and filaments.

Coffey, H.E.

1987-07-01T23:59:59.000Z

393

October 15, 2003 22:8 Geophysical Journal International gji2029 Geophys. J. Int. (2003) 155, 367378  

E-Print Network (OSTI)

in the south- western Karoo Basin, thus demonstrating the potential of this technique to determine ages of ash lithostratigraphic model for this part of the Karoo basin, suggesting that a reevaluation of the Ecca and lower- ments. We do acknowledge salinity fluctuations during early Karoo basin evolution (lower Ecca Group

394

Marine geophysical study of cyclic sedimentation and shallow sill intrusion in the floor of the Central Gulf of California  

E-Print Network (OSTI)

and sills of the western Karoo, South Africa. S. Afr. J.and sills of the western Karoo, South Africa. S. Afr. J.vent complexes in the Karoo Basin, South Africa. J. Geol.

Kluesner, Jared W.

2011-01-01T23:59:59.000Z

395

Nonlinear Processes in Geophysics (2004) 11: 647657 SRef-ID: 1607-7946/npg/2004-11-647 Nonlinear Processes  

E-Print Network (OSTI)

Universit¨at, Braunschweig, Germany 6Space Research Institute, Austrian Academy of Sciences, Graz, Austria 7 2004 ­ Accepted: 9 December 2004 ­ Published: 13 December 2004 Part of Special Issue "Advances in space wave emission known under the name of lion roars and indi- cating that the mirror modes contain

Paris-Sud XI, Université de

396

GIS Regional Spatial Data from the Great Basin Center for Geothermal Energy: Geochemical, Geodesic, Geologic, Geophysical, Geothermal, and Groundwater Data  

DOE Data Explorer (OSTI)

\tFavorability and Evidence Data 7 WinRAR ZIP files and links to detailed metadata. Includes data from regression models, gravity and temperature gradients, dilational strain data, and weighted earthquake epicenter data.

397

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Simulated Climate Sensitivity, Feedbacks and Mean1  

E-Print Network (OSTI)

mented into shortwave (SW) feedbacks (ASCF: Figure 1a) and longwave (LW) feedbacks152 (ALCF: Figure 1b SENSITIVITY slope when regressed against climate sensitivity than ALCF indicates clouds with both162 longwave165 listed in Table 3. ALCF has the highest correlation, and is of opposite sign to the ASCF166

Gettelman, Andrew

398

Modeling the resolution of inexpensive, novel non-seismic geophysical monitoring tools to monitor CO2 injection into coal beds  

E-Print Network (OSTI)

G. E. , 1942, The electrical resistivity log as an aid inseismic velocity and electrical resistivity as a function ofseismic velocity and electrical resistivity as a function of

Gasperikova, E.

2010-01-01T23:59:59.000Z

399

WEST COAST REGIONAL CARBON SEQUESTRATION PARTNERSHIP - REPORT ON GEOPHYSICAL TECHNIQUES FOR MONITORING CO2 MOVEMENT DURING SEQUESTRATION  

E-Print Network (OSTI)

G. E. , 1942, The electrical resistivity log as an aid inV S , density and electrical resistivity). A description ofet al. (2003). Electrical resistivity as a function of

Gasperikova, Erika

2005-01-01T23:59:59.000Z

400

A multi-physics, integrated approach to formation evaluation using borehole geophysical measurements and 3D seismic data  

E-Print Network (OSTI)

AUTOCAD, CAD, CADD) bcc blind courtesy copy ACT [logging] neutron porosity (Cf source) BCOM [JOK and epithermal neutron porosity (Am/Be source) logging tool (Schlumberger version G) CORELOG [ODP] database International Association of Drilling Contractors IAPSO International Association for the Physical Sciences

Torres-Verdín, Carlos

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Observations of northern latitude ground-surface and  

E-Print Network (OSTI)

Temperatures were measured with a portable winch and a platinum resistance tempera- ture detector (RTD by comparison to a SEABIRDTM digital-platinum RTD. Field data were recorded the summer of 2006. The earlier

Woodbury, Allan D.

402

Investigations on the Structure Tectonics, Geophysics, Geochemistry, and Hydrocarbon Potential of the Black Mesa Basin, Northeastern Arizona  

SciTech Connect

The U.S. Department of Energy (DOE) has instituted a basin-analysis study program to encourage drilling in underexplored and unexplored areas and increase discovery rates for hydrocarbons by independent oil companies within the continental United States. The work is being performed at the DOE's National Institute for Petroleum and Energy Research (NIPER) in Bartlesville, Oklahoma, by the Exploration and Drilling Group within BDM-Oklahoma (BDM), the manager of the facility for DOE. Several low-activity areas in the Mid-Continent, west, and southwest were considered for the initial study area (Reeves and Carroll 1994a). The Black Mesa region in northwestern Arizona is shown on the U.S. Geological Survey 1995 oil and gas map of the United States as an undrilled area, adapted from Takahashi and Gautier 1995. This basin was selected by DOE s the site for the initial NIPER-BDM survey to develop prospects within the Lower-48 states (Reeves and Carroll 1994b).

Barker, Colin; Carroll, Herbert; Erickson, Richard; George, Steve; Guo, Genliang; Reeves,T.K.; Sharma, Bijon; Szpakiewicz, Michael; Volk, Len

1999-04-27T23:59:59.000Z

403

GEOPHYSICS, VOL. 67, NO. 5 (SEPTEMBER-OCTOBER 2002); P. 15321541, 5 FIGS. 10.1190/1.1512749  

E-Print Network (OSTI)

- mum support stabilizing functional, similar to the one intro- duced by Last and Kubic (1983 be- tween our approach and the one discussed by Last and Kubic (1983) is in constructing an iterative in several ear- lier publications (Last and Kubic, 1983; Wolke and Schwetlick, 1988; O'Leary, 1990

Utah, University of

404

Inversion of commbined geophysical data for determination of structure beneath the Imperial Valley geothermal region. Final report  

DOE Green Energy (OSTI)

A program aimed at developing formal numerical modeling data sets for defining the earth's near surface environment is discussed. The numerical modeling procedures developed and the results obtained in these areas are described. The conclusions are enumerated. (MHR)

Savino, J.M.; Rodi, W.L.; Goff, R.C.; Jordan, T.H.; Alexander, J.H.; Lambert, D.G.

1977-09-01T23:59:59.000Z

405

Marine geophysical study of cyclic sedimentation and shallow sill intrusion in the floor of the Central Gulf of California  

E-Print Network (OSTI)

drilling results found extensive evidence of sill-driven fluid-Drilling results confirmed (Kastner, 1982) that vertical discharge hydrothermal fluids

Kluesner, Jared W.

2011-01-01T23:59:59.000Z

406

GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 5, PAGES 811-814, MARCH 1, 2001 Parameterizing Tidal Dissipation over Rough  

E-Print Network (OSTI)

ocean, the energy flux carried by internal waves generated over rough topog- raphy dominates the energy that the inclusion of this dissipation mechanism improves hydro- dynamical models of the ocean tide. It also issues. The first is whether including a parameterization for internal wave energy-flux in a model

Jayne, Steven

407

Marine geophysical study of cyclic sedimentation and shallow sill intrusion in the floor of the Central Gulf of California  

E-Print Network (OSTI)

whom I can bounce ideas. Sandy will always be a close friendwhile the reflector-rich sandy units were being deposited,several 2-3 cm thick basal sandy silt layers found in the

Kluesner, Jared W.

2011-01-01T23:59:59.000Z

408

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

or other devices such as calculators, PDAs and cell phones, unless explicitly au- thorized; acquiring to be a certain amount of consistency when handling such issues, so if a member of the Mines community has grounds

Constable, Steve

409

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

on a quiz, test or exami- nation; using books, notes or other devices such as calcula- tors, PDAs and cell

Constable, Steve

410

scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics  

E-Print Network (OSTI)

such as calcula- tors, PDAs and cell phones, unless explicitly authorized; acquiring without authorization copies

Constable, Steve

411

1.5 References Batzle, M. and Wang, Z., 1992, Seismic properties of pore fluids: Geophysics, Vol.  

E-Print Network (OSTI)

. 57, No. 11, p. 1396-1408. Batzle, M.L., Han, D., Wang, W., Wu, X., Ge, H., and Zhao, H., 1997, Fluid, USA, 348 pp. Chen, C.T., Chen, L.S., and Millero, F.J., 1978, Speed of sound in NaCl, MgCl2, Na2SO4-685. Hales, A.L., and Roberts, J.L., 1974, The Zoeppritz amplitude equations: more errors: Bulletin

412

Response of the Atlantic Thermohaline Circulation to Increased Atmospheric CO2 in a Coupled Model  

Science Conference Proceedings (OSTI)

Changes in the thermohaline circulation (THC) due to increased CO2 are important in future climate regimes. Using a coupled climate model, the Parallel Climate Model (PCM), regional responses of the THC in the North Atlantic to increased CO2 and ...

Aixue Hu; Gerald A. Meehl; Warren M. Washington; Aiguo Dai

2004-11-01T23:59:59.000Z

413

SBIPROCK, NEW MEXICO  

Office of Legacy Management (LM)

n a l chodrr ofthc ficld Luaumts h g M to within 10'C o f b tcmpaaiw ofthc water to bc -led? W u thc d i b u i o o infnmatim r c a d d on thc *Id dDtl r h d s ? 2k.z 4. Wrr a...

414

Preliminary Investigation EA-2007-02  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of Violation Dear Mr. Foley: Pursuant to section 234B of thc Atomic Energy Act of 1954, as amended, and the Department of Energy's regulations at 10 C.F.R. 5 824.4(a)(3) and...

415

The Role of North Atlantic Deep Water Formation in an OGCMs Ventilation and Thermohaline Circulation  

Science Conference Proceedings (OSTI)

Two coarse-resolution model experiments are carried out on an OGCM to examine the effects of North Atlantic Deep Water (NADW) formation on the thermohaline circulation (THC) and ventilation timescales of the abyssal ocean. An idealized age tracer ...

Paul J. Goodman

1998-09-01T23:59:59.000Z

416

Nonnormal Perturbation Growth of Pure Thermohaline Circulation Using a 2D Zonally Averaged Model  

Science Conference Proceedings (OSTI)

Generalized linear stability theory is used to calculate the optimal initial conditions that result in transient amplification of the thermohaline circulation (THC) in a zonally averaged single-basin ocean model. The eigenmodes of the tangent ...

Julie Alexander; Adam H. Monahan

2009-02-01T23:59:59.000Z

417

The Thermohaline Circulation and Vertical Mixing: Does Weaker Density Stratification Give Stronger Overturning?  

Science Conference Proceedings (OSTI)

The possibility that a decreased equator-to-Pole surface density difference could imply stronger rather than weaker thermohaline circulation (THC) is explored theoretically as well as with the aid of numerical simulations. The idea builds on the ...

Johan Nilsson; Gran Brostrm; Gsta Walin

2003-12-01T23:59:59.000Z

418

A Wind-Induced Thermohaline Circulation Hysteresis and Millennial Variability Regimes  

Science Conference Proceedings (OSTI)

The multiple equilibria of the thermohaline circulation (THC: used here in the sense of the meridional overturning circulation) as function of the surface freshwater flux has been studied intensively following a Stommel paper from 1961. It is ...

Yosef Ashkenazy; Eli Tziperman

2007-10-01T23:59:59.000Z

419

How ORISE is Making a Difference: Travelers' Health Campaign  

NLE Websites -- All DOE Office Websites (Extended Search)

online outreach. Campaign themes include "Prevention can be Travel-Sized" and "Stop, Wash and Go." Among THC's core messages, the CDC is urging people to take the following...

420

Thermohaline Circulation Stability: A Box Model Study. Part II: Coupled AtmosphereOcean Model  

Science Conference Proceedings (OSTI)

A thorough analysis of the stability of a coupled version of an interhemispheric three-box model of thermohaline circulation (THC) is presented. This study follows a similarly structured analysis of an uncoupled version of the same model ...

Valerio Lucarini; Peter H. Stone

2005-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Validation Testing for the PM-PEMS Measurement Allowance Program  

E-Print Network (OSTI)

Digital Loc1 PEMS3 Digital Loc2 Event Trigger PEMS3 TailpipeDigital Loc1 PEMS3 Digital Loc2 Event Trigger PEMS3 TailpipeEvent Trig THC ppm Event Trigger Sample Time (sec) Figure 4-

Johnson, K; Durbin, T; Jung, H; Cocker III, D R; Khan, M Y

2010-01-01T23:59:59.000Z

422

Thermohaline Circulation Studies with an Isopycnic Coordinate Ocean Model  

Science Conference Proceedings (OSTI)

The thermohaline circulation (THC) in a 1000-yr near-global numerical simulation using the Miami Isopycnic Coordinate Ocean Model is analyzed and compared to observations. The model, driven by observed monthly atmospheric climatology, uses ...

Shan Sun; Rainer Bleck

2001-09-01T23:59:59.000Z

423

Electronic Structure of the Heaviest Elements  

E-Print Network (OSTI)

of urmium, neptunium, plutonium, and ~mcricfumin most offrom C-ifficult to cffect plutonium it becone s incrcasin~lin goirz Srom urenium to plutonium, and arith americium thc

Seaborg, G.T.

2008-01-01T23:59:59.000Z

424

Tropical Stabilization of the Thermohaline Circulation in a Greenhouse Warming Simulation  

Science Conference Proceedings (OSTI)

Most global climate models simulate a weakening of the North Atlantic thermohaline circulation (THC) in response to enhanced greenhouse warming. Both surface warming and freshening in high latitudes, the so-called sinking region, contribute to ...

M. Latif; E. Roeckner; U. Mikolajewicz; R. Voss

2000-06-01T23:59:59.000Z

425

Mechanisms Affecting the Overturning Response in Global Warming Simulations  

Science Conference Proceedings (OSTI)

Climate models used to produce global warming scenarios exhibit widely diverging responses of the thermohaline circulation (THC). To investigate the mechanisms responsible for this variability, a regional Atlantic Ocean model driven with forcing ...

U. Schweckendiek; J. Willebrand

2005-12-01T23:59:59.000Z

426

Artifactual localization of ferritin in the ciliary epithelium in vitro  

E-Print Network (OSTI)

The accumulation of fcrritin by the ciliary epithelium of thc adult albino rabbit has been studied by clectron microscopy. The experimcnts havc been carried out undcr in vitro conditions, such that any uptake observed should be the result of passivc diffusion of the tracer particlcs rathcr than the product of active metabolic processcs. The cclls werc fixcd in osmium tctroxidc and cmbeddcd in Araldite. Fcrritin was found localized in thrcc areas: in rows of apparent vesicles, free in thc cytoplasmic matrix, and in thc basement membrane. Some of the conclusions reached are as follows. The appcarancc of tracer in rows of vcsicles is not in itself an adequate demonstration of pinocytosis. Thc permcability of the plasma mcmbrane is drastically increased by osmium tetroxide fixation, so that tracer particles are free to diffusc across the membrane and wander through the cytoplasm. These resuhs indicate the serious dangcr of being misled by artifacts whcn colloidal particles arc used as tracers.

John Med Tormey

1965-01-01T23:59:59.000Z

427

Labor Force Position of Latino Immigrants in California  

E-Print Network (OSTI)

American immigrant women havc the highest rate (13 pcrccnt)Latino men nor do they havc a direct effect on thc economicand among Immigrants who havc become citizens. Contact with

Ortiz, Vilma

1995-01-01T23:59:59.000Z

428

Bio-Organic Chemistry Quarterly Report  

E-Print Network (OSTI)

ori 1orrc.slriirl conditions havc sf tl~! it! tI ~J)I ~t'd 1~sort~enc~ thc is seen to havc Crirl~r 5fkO rtb YQ! 1 ~ttll~

Various

1961-01-01T23:59:59.000Z

429

Ocean Gyres and Abrupt Change in the Thermohaline Circulation: A Conceptual Analysis  

Science Conference Proceedings (OSTI)

The implications are investigated of representing ocean gyre circulations by a diffusion term in the Stommel and Rooth box models of the thermohaline circulation (THC) in one and two hemispheres, respectively. The approach includes mostly ...

Hannah Longworth; Jochem Marotzke; Thomas F. Stocker

2005-07-01T23:59:59.000Z

430

Global Thermohaline Circulation. Part II: Sensitivity with Interactive Atmospheric Transports  

Science Conference Proceedings (OSTI)

A hybrid coupled oceanatmosphere model is used to investigate the stability of the thermohaline circulation (THC) to an increase in the surface freshwater forcing in the presence of interactive meridional transports in the atmosphere. The ocean ...

Xiaoli Wang; Peter H. Stone; Jochem Marotzke

1999-01-01T23:59:59.000Z

431

Processes Governing the Recovery of a Perturbed Thermohaline Circulation in HadCM3  

Science Conference Proceedings (OSTI)

In an experiment with the latest version of the Hadley Centre climate model the model response has been analyzed after the thermohaline circulation (THC) in the Atlantic Ocean has been suppressed. The suppression is induced by a strong initial ...

Michael Vellinga; Richard A. Wood; Jonathan M. Gregory

2002-04-01T23:59:59.000Z

432

Characterising and modelling the excavation damaged zone (EDZ) in crystalline rock in the context of radioactive waste disposal  

E-Print Network (OSTI)

potential for thermo-hydro- mechanical-chemical modelling ofweight should be given to hydro-thermo-mechanical couplings.of impacts of thermo-hydro-chemical (THC) and thermo-hydro-

Hudson, J.A.

2009-01-01T23:59:59.000Z

433

The Atmospheric Response to a Thermohaline Circulation Collapse: Scaling Relations for the Hadley Circulation and the Response in a Coupled Climate Model  

Science Conference Proceedings (OSTI)

The response of the tropical atmosphere to a collapse of the thermohaline circulation (THC) is investigated by comparing two 5-member ensemble runs with a coupled climate model (CCM), the difference being that in one ensemble a hosing experiment ...

Sybren S. Drijfhout

2010-02-01T23:59:59.000Z

434

Response of Thermohaline Circulation to Freshwater Forcing under Present-Day and LGM Conditions  

Science Conference Proceedings (OSTI)

Responses of the thermohaline circulation (THC) to freshwater forcing (hosing) in the subpolar North Atlantic Ocean under present-day and the last glacial maximum (LGM) conditions are investigated using the National Center for Atmospheric ...

Aixue Hu; Bette L. Otto-Bliesner; Gerald A. Meehl; Weiqing Han; Carrie Morrill; Esther C. Brady; Bruce Briegleb

2008-05-01T23:59:59.000Z

435

Recent Variability of the North Atlantic Thermohaline Circulation Inferred from Surface Heat and Freshwater Fluxes  

Science Conference Proceedings (OSTI)

An annual-mean surface-forced component of the North Atlantic thermohaline circulation (THC) in density space, ?surf(?,?), is diagnosed from observed surface heat and freshwater fluxes. The climatological mean of ?surf over 198097 indicates ...

Robert Marsh

2000-09-01T23:59:59.000Z

436

The Energetics of Global Thermohaline Circulation and Its Wind Enhancement  

Science Conference Proceedings (OSTI)

The energy budget of global thermohaline circulation (THC) is numerically investigated using an ocean general circulation model (OGCM) under a realistic configuration. Earlier studies just discuss a globally integrated energy budget. This study ...

L. Shogo Urakawa; Hiroyasu Hasumi

2009-07-01T23:59:59.000Z

437

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 102,NO. B3, PAGES 5281-5293, MARCH 10, 1997 Quantitative implementation of Preisach-Mayergoyz  

E-Print Network (OSTI)

Astronomy, Uni- versity of Massachusetts,Amherst, MA 01003. (e-mMl: rag@cmp.phast.umass.edu) L. B. Hilbert

438

Nonlinear Processes in Geophysics c ? European Geosciences Union 2003 MHD turbulence and heating of the open field-line solar corona  

E-Print Network (OSTI)

Abstract. This paper discusses the possibility that heating of the solar corona in open field-line regions emanating from coronal holes is due to a nonlinear cascade, driven by low-frequency or quasi-static magnetohydrodynamic fluctuations. Reflection from coronal inhomogeneities plays an important role in sustaining the cascade. Physical and observational constraints are discussed. Kinetic processes that convert cascaded energy into heat must occur in regions of turbulent small-scale reconnection, and may be similar in some respects to ion heating due to intense electron beams observed in the aurora. 1

W. H. Matthaeus; D. J. Mullan; P. Dmitruk; L. Milano; S. Oughton

2002-01-01T23:59:59.000Z

439

The physics of premelted ice and its geophysical consequences Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA  

E-Print Network (OSTI)

. Books Atkinson, A. C., Donev, A. N. and Tobias, R. D. (2007). Optimum Experimental Designs, in SAS. Oxford University Press. Atkinson, A.C. and Donev, A.N (1992). Optimum Experimental Designs. Oxford University Press. Refereed journals papers Althubaiti, A. and Donev, A. N. (2011). Mixture experiments

Rempel, Alan W.

440

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103,NO. AS, PAGES 9165-9176,MAY 1, 1998 Structure of the dissipation region during collisionless  

E-Print Network (OSTI)

. Nusinovich,1 M. Korol,2 and E. Jerby2 1 Institute for Plasma Research, University of Maryland, College Park

Shay, Michael

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Published in Geophysical Research Letters, 26, p. 21632166, 1999. Copyright AGU, 1999. The scaling of collisionless, magnetic reconnection for large systems  

E-Print Network (OSTI)

. Sauer2 1 Institute for Plasma Research and Department of Physics, University of Maryland, College Park

Shay, Michael

442

GEOPHYSICAL RESEARCH LETTERS, VOL. 25, NO. 20, PAGES 37593762, OCTOBER 15, 1998 The role of electron dissipation on the rate of  

E-Print Network (OSTI)

for PlasmaResearch,Universityof Maryland, CollegePark R. E. Denton Department of Physicsand Astronomy

Shay, Michael

443

GEOPHYSICAL RESEARCH LETTERS, VOL. 25, NO. 20, PAGES 3759-3762, OCTOBER 15, 1998 The role of electron dissipation on the rate of  

E-Print Network (OSTI)

of the dissipation region during collisionless magnetic reconnection M. A. Shay and J. F. Drake Institute for PlasmaResearch,Institutefor Plasma Research,EnergyResearchBuilding223, University of Maryland,CollegePark,MD 20742-3511( e

Shay, Michael

444

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 94, NO. B12, PAGES 17,543-17,559,DECEMBER 10, 1989 MANTLE DYNAMICS WITH INDUCED PLATE TECTONICS  

E-Print Network (OSTI)

'Connell, 1979; Ricard et al., 1984; Richards and Hager, 1985; Forte and Peltier, 1987]. In most constant. By inspection of equation (3), one sees that the velocity V is the curl of a vector field and can

445

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 106, NO. A3, PAGES 3715-3719, MARCH 1, 2001 GeospaceEnvironmental Modeling (GEM) Magnetic  

E-Print Network (OSTI)

, Germany J. F. Drake, B. N. Rogers, and M. A. Shay Institute for Plasma Research, University of Maryland@vohloh.de) J. F. Drake, B. N. Rogers, and M. A. Shay, Institute for Plasma Research, University of Maryland

Shay, Michael

446

JOURNAL OF GEOPHYSICAL RESEARCH: PLANETS, VOL. 118, 938951, doi:10.1002/jgre.20077, 2013 Magnetodynamo lifetimes for rocky, Earth-mass exoplanets  

E-Print Network (OSTI)

Fe at center 5391 K NT Effective dissipation temperature 3500 K S Entropy of fusion 118(e) J mol­1 K] examined the effect of surface temperatures and plate tectonics. They found that higher surface tempera numerical simulations. [6] Furthermore, numerical models can adequately treat the effects of a nonuniform

Conrad, Clint

447

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. XXX, XXXX, DOI:10.1029/2006JB004763, 2007 Persistent Scatterer InSAR for Crustal Deformation Analysis, with  

E-Print Network (OSTI)

of deformation. The first we model as a contracting pipe-like body, which we interpret to be a crystallizing known to have erupted rhyolite as well as basalt [Geist et al., 1994]. The last known eruption occurred

Segall, Paul

448

Basalt features observed in outcrops, cores, borehole video imagery and geophysical logs, and basalt hydrogeologic study at the Idaho National Engineering Laboratory, Eastern Idaho  

Science Conference Proceedings (OSTI)

A study was undertaken to examine permeable zones identified in boreholes open to the underlying basalt and to describe the vertical cross flows present in the boreholes. To understand the permeable zones in the boreholes detailed descriptions and measurements of three outcrops in the Snake River Plain, three cores at the Idaho Chemical Processing Plant (ICPP) at the INEL, and over fifty borehole TV logs from the INEL were carried out. Based on the observations made on the three outcrops an idealized basalt lava flow model was generated that used a set of nomenclature that would be standard for the basalt lava flows studied. An upper vesicular zone, a sometimes absent columnar zone, central zone, and lower vesicular zone make up the basalt lava flow model. The overall distinction between the different zones are based on the vesicle shape size, vesicularity, and fractures present. The results of the studies also indicated that the basalt lava flows at the INEL are distal to medial facies pahoehoe lava flows with close fitting contacts. The most permeable zones identified in these basalts are fractured vesiculated portions of the top of the lava flow, the columnar areas, and basalt-flow contacts in order of importance. This was determined from impeller flowmeter logging at the INEL. Having this information a detailed stratigraphy of individual basalt lava flows and the corresponding permeable units were generated. From this it was concluded that groundwater flow at the ICPP prefers to travel along thin basalt lava flows or flow-units. Flow direction and velocity of intrawell flows detected by flowmeter is controlled by a nearby pumping well.

Bennecke, W.M.

1996-10-01T23:59:59.000Z

449

Student-based archaeological geophysics in northern Thailand Emily A. Hinz*, Lee M. Liberty, and Spencer H. Wood, Boise State University, Fongsaward Singharajawarapan  

E-Print Network (OSTI)

%. Ambient or "free" sediments were more easily entrained than fecal mounds, which were restrained from they lack nutritive benefit . The experiments of Lopez and Levinton (1978) with Hydrobia ventrosa showed, and for distributed roughness (e.g., fecal pellet mounds, tracks) the relationship between z o and particle size

Barrash, Warren

450

GEOPHYSICS, VOL. 71, NO. 1 (JANUARY-FEBRUARY 2006); P. N1N9, 15 FIGS. 10.1190/1.2159053  

E-Print Network (OSTI)

a majority of states have implemented Renewable Portfolio Standards mandating that a percentage of total that encourage wind development such as Renewable Portfolio Standards are also often portrayed as economic sample empirical data that will be of use to policymakers and future researchers. Our study is in line

451

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 99, NO. B1, PAGES 577-588, JANUARY 10, 1994 On the electrical nature of the axial melt zone at 13 N  

E-Print Network (OSTI)

. Streamline models can be advantageous in two ways. First, the stream- line simulator can serve streamlines are straight lines and the distance is measured in units of t. The coordinate transformation by simply integrating the contributions of individual stream- lines reaching the producer [Datta

Constable, Steve

452

VOL. 79, NO. 28 JOURNAL OF GEOPHYSICAL RESEARCH OCTOBER 1, 1974 On the BackscatterInstability of Solar Wind Alfvn Waves  

E-Print Network (OSTI)

the solar wind, Ik*(-) = Io k __K where/oba(k)is thepowerspectrumdeterminedfrom spaceInstability of Solar Wind Alfvn Waves RONALD H. COHEN x AND ROBERT L. DEWAR ·' Plasma PhysicsLaboratory, Princeton6n waves.Theseassumptionsare reasonablefor the solar wind

Dewar, Robert L.

453

Final Report for "Toward Quantifying Kinetics of Biotic and Abiotic Metal Reduction with Electrical Geophysical Methods" DE-FG02-08ER64520  

Science Conference Proceedings (OSTI)

Although changes in the bulk electrical conductivity in aquifers have been attributed to microbial activity, electrical conductivity has never been used to infer biogeochemical reaction rates quantitatively. To explore the use of electrical conductivity to measure reaction rates, we conducted iron oxide reduction experiments of increasing biological complexity. To quantify reaction rates, we proposed composite reactions that incorporated the stiochiometry of five different types of reactions: redox, acid-based, sorption, dissolution/precipitation, and biosynthesis. In batch and column experiments, such reaction stiochiometries inferred from a few chemical measurements allowed quantification of the Fe-oxide reduction rate based on changes in electrical conductivity. The relationship between electrical conductivity and fluid chemistry did not hold during the latter stages of the column experiment when electrical conductivity increased while fluid chemistry remained constant. Growth of an electrically conductive biofilm could explain this late stage electrical conductivity increase. This work demonstrates that measurements of electrical conductivity and flow rate, combined with a few direct chemical measurements, can be used to quantify biogeochemical reaction rates in controlled laboratory situations and may be able to detect the presence of biofilms.

Singha, Kamini; Brantley, Susan

2012-06-07T23:59:59.000Z

454

GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 13, PAGES 1807-1810, July 1, 2000 Characteristics of Fe Ablation Trails Observed During  

E-Print Network (OSTI)

shower with an air- borne Fe lidar aboard the NSF/NCAR Electra aircraft over Okinawa. The average, 1999]. Our group deployed an airborne zenith pointing Fe lidar in Okinawa (26.3 N, 127.7 E) as part

Chu, Xinzhao

455

GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 13, PAGES 1815-1818, JULY 1, 2000 Lidar Observations of Elevated Temperatures in Bright  

E-Print Network (OSTI)

the 1998 Leonid Multi-Instrument Campaign experiment over Okinawa, Japan [Chu et al., 2000]. Moreover

Chu, Xinzhao

456

JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES, VOL. 118, 34863494, doi:10.1002/jgrd.50339, 2013 The signature of the stratospheric Brewer-Dobson circulation  

E-Print Network (OSTI)

in the tropical tropopause transition layer (TTL) juxtaposed against decreased cloud incidence in the Arctic tropopause transition layer (TTL) and the Arctic troposphere. [4] Clouds play a central role in the climate of both the TTL and Arctic troposphere. The TTL extends from roughly the level of near-zero clear

457

GEOPHYSICAL RESEARCH LETTERS, VOL. 26, NO. 9, PAGES 1255-1258, MAY 1, 1999 Measurements of the solar soft x-ray irradiance  

E-Print Network (OSTI)

. Introduction Solar soft x-ray ( energy is deposited into the lower thermosphere at altitudes between values of bandpass integrated energy flux are reported. For the present analysis, the SC#21REFW solar of the solar soft x-ray irradiance from the Student Nitric Oxide Explorer Scott M. Bailey Center

Bailey, Scott

458

Progress Report, December 2010: Improved Site Characterization And Storage Prediction Through Stochastic Inversion Of Time-Lapse Geophysical And Geochemical Data  

Science Conference Proceedings (OSTI)

Over the last project six months, our project activities have concentrated on three areas: (1) performing a stochastic inversion of pattern 16 seismic data to deduce reservoir permeability, (2) development of the geochemical inversion strategy and implementation of associated software, and (3) completing the software implementation of TProGS and the geostatistical analysis that provides the information needed when using the software to produce realizations of the Midale reservoir. The report partially the following deliverables: D2: Model development: MCMC tool (synthetic fluid chemistry data); deliverable completed. D4: Model development/verification: MCMC tool (TProGS, field seismic/chemistry data) work product; deliverable requirements partially fulfilled. D5: Field-based single-pattern simulations work product; deliverable requirements partially fulfilled. When completed, our completed stochastic inversion tool will explicitly integrate reactive transport modeling, facies-based geostatistical methods, and a novel stochastic inversion technique to optimize agreement between observed and predicted storage performance. Such optimization will be accomplished through stepwise refinement of: (1) the reservoir model - principally its permeability magnitude and heterogeneity - and (2) geochemical parameters - primarily key mineral volume fractions and kinetic data. We anticipate that these refinements will facilitate significantly improved history matching and forward modeling of CO{sub 2} storage. Our tool uses the Markov Chain Monte Carlo (MCMC) methodology. Deliverable D1, previously submitted as a report titled ''Development of a Stochastic Inversion Tool To Optimize Agreement Between The Observed And Predicted Seismic Response To CO{sub 2} Injection/Migration in the Weyburn-Midale Project'' (Ramirez et al., 2009), described the stochastic inversion approach that will identify reservoir models that optimize agreement between the observed and predicted seismic response. The software that implements this approach has been completed, tested, and used to process seismic data from pattern 16. A previously submitted report titled ''Model verification: synthetic single pattern simulations using seismic reflection data'', Ramirez et al. 2010, partially fulfilled deliverable D3 by summarizing verification activities that evaluate the performance of the seismic software and its ability to recover reservoir model permeabilities using synthetic seismic reflection data. A future progress report will similarly describe summarizing verification activities of the geochemical inversion software, thereby completing deliverable D3. This document includes a chapter that shows and discusses permeability models produced by seismic inversion that used seismic data from pattern 16 in Phase 1A. It partially fulfills deliverable D5: Field-based single-pattern simulations work product. The D5 work product is supposed to summarize the results of applying NUFT/MCMC to refine the reservoir model and geochemical parameters by optimizing observation/prediction agreement for the seismic/geochemical response to CO{sub 2} injection/migration within a single pattern of Phase 1A/1B. A future progress report will show inversion results for the same pattern using geochemical data, thereby completing deliverable D5. This document also contains a chapter that fulfills deliverable D2: Model development: MCMC tool (synthetic fluid chemistry data). The chapter will summarize model development activities required to facilitate application of NUFT/MCMC to optimize agreement between the observed and predicted geochemical response to CO{sub 2} injection/migration. Lastly, this document also contains a chapter that partially fulfills deliverable D4: Model development/verification: MCMC tool (TProGS, field seismic/chemistry data) work product. This work product is supposed to summarize model development activities required for (1) application of TProGS to Weyburn, (2) use of TProGS within the MCMC tool, and (3) application of the MCMC tool to address field seismic and g

Ramirez, A; Mcnab, W; Carle, S; Hao, Y; White, D; Johnson, J

2010-12-17T23:59:59.000Z

459

An exact solution for geophysical equatorial edge waves over a sloping beach This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network (OSTI)

, when Stokes [39], on the basis of linear water theory, gave a simple solution of a system describing to the shore was shown by Whitham [44] by using a formal Fourier series expansion for the full water-wave problem. Yeh [45] studied the properties of nonlinear progressive edge waves, using the fact

Matioc, Anca-Voichita

460

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 98, NO. B7, PAGES 11,885-11,899, JULY 10, 1993 The ElectricalConductivityof Lherzolite  

E-Print Network (OSTI)

.Thus,thepyrolysisof oil shale,whichcanoccurduring diagenesis,leadsto a large increasein electricala because

Constable, Steve

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 102, NO. D20, PAGES 23,79323,803, OCTOBER 27, 1997 Sensitivity of climate simulations to radiative effects of  

E-Print Network (OSTI)

with observations and cloud resolving models, are incorporated into a simple prognostic anvil parameterization. These features include anvil convective origin, vertical profile, phase, areal extent, and lifespan. Two. The prognostic anvil formulation enhances ice and reduces liquid in the tropics. Increase in hydrometeor size

Zender, Charles

462

GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 7, PAGES 1231-1234, APRIL 1, 2001 Anthropogenic emission of mercury to the atmosphere  

E-Print Network (OSTI)

at a regional scale in the northeast United States. This region has the highest Hg emission of the country [US by fossil fuel consumption [US EPA, 1997]. Third, anthropogenic C source strength is well understood measurement, we only use observations made in the daytime, convective conditions when the sur- face values

Lee, Xuhui

463

A Contribution to the Encyclopedia of Climate and Weather Yi Ming NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey USA  

E-Print Network (OSTI)

, the concerns over public health prompted researchers to study the fallout (radioactive dust) from nuclear-phase pollutants) in densely populated cities (such as London and Los Angeles). In the 1970s, a small group

464

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 93, NO. D5, PAGES 5319-5332, MAY 20, 1988 Effectsof Dirty Snow in Nuclear Winter Simulations  

E-Print Network (OSTI)

Snow in Nuclear Winter Simulations A.M. VOGELMANN,1A. ROBOCK,ANDR. G. ELLINGSON Department the atmospherefrom burning forests,cities,and industriesin targeted areas. This smokecouldfall out onto snowand ice simulations which span severalyears. These effectsare investigatedfor different nuclear winter scenarios

Robock, Alan

465

GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 15, doi:10.1002/grl.50683, 2013 Seismoacoustic coupling induced by the breakup of the 15 February  

E-Print Network (OSTI)

was observed as a fireball traveling through the Earth's atmosphere, exploding in an air burst near the city the Rayleigh waves as being initiated by the shock wave produced by the main blast that occasioned damages://neo.jpl.nasa.gov) at about 23 km altitude and is thought to have caused injuries and damages within the city of Chelyabinsk

Recanati, Catherine

466

Geothermal Data for the Eastern and Southeastern United States from the Regional Geophysics Laboratory of Virginia Polytechnic Institute and State University  

DOE Data Explorer (OSTI)

Other resources available on this web page (below the list of maps) provide information about hot springs in the southeastern U.S., temperatures for Atlantic Coastal Plain sediments, and deep fracture permeability in crystalline rocks in the eastern and southeastern U.S.

467

A high resolution geophysical investigation of spatial sedimentary processes in a paraglacial turbid outwash fjord: Simpson Bay, Prince William Sound, Alaska  

E-Print Network (OSTI)

Simpson Bay is a turbid, outwash fjord located in northeastern Prince William Sound, Alaska. A high ratio of watershead:basin surface area combined with high precipitation and an easily erodable catchment create high sediment inputs. Fresh water from heavy precipitation and meltwater from high alpine glaciers enter Simpson Bay through bay head rivers and small shoreline creeks that drain the catchment. Side scan sonar, seismic profiling, and high resolution bathymetry were used to investigate the record of modern sedimentary processes. Four bottom types and two seismic faces were described to delineate the distribution of sediment types and sedimentary processes in Simpson Bay. Sonar images showed areas of high backscatter (coarse grain sediment, bedrock outcrops and shorelines) in shallow areas and areas of low backscatter (estuarine mud) in deeper areas. Seismic profiles showed that high backscatter areas reflected emergent glacial surfaces while low backscatter areas indicated modern estuarine mud deposition. The data show terminal morainal bank systems and grounding line deposits at the mouth of the bay and rocky promontories, relict medial moraines, that extend as terrestrial features through the subtidal and into deeper waters. Tidal currents and mass wasting are the major influences on sediment distribution. Hydrographic data showed high spatial variability in surface and bottom currents throughout the bay. Bottom currents are tide dominated, and are generally weak (5-20 cm s-1) in the open water portions of the bay while faster currents are found associated with shorelines, outcrops, and restrictive sills. Tidal currents alone are not enough to cause the lack of estuarine mud deposition in shallow areas. Bathymetric data showed steep slopes throughout the bay suggesting sediment gravity flows. Central Alaska is a seismically active area, and earthquakes are most likely the triggering mechanism of the gravity flows.

Noll, Christian John, IV

2005-12-01T23:59:59.000Z

468

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 91, NO. B6, PAGES 6535-6545,MAY 10, 1986 InverseHydrologicAnalysisof the Distribution and Origin  

E-Print Network (OSTI)

necessary for scale economies, Shell reportedly believes. Exxon announced that it had proven a new G hydro- isomerization in a conventional fixed-bed reactor to produce synthetic liquids. Exxon has. In what was to be a joint project with the Qatar General Petroleum Corporation, Exxon proposed to build

Bethke, Craig

469

Rotation of EOFs by the Independent Component Analysis: Toward a Solution of the Mixing Problem in the Decomposition of Geophysical Time Series  

Science Conference Proceedings (OSTI)

The Independent Component Analysis (ICA) is a recently developed technique for component extraction. This new method requires the statistical independence of the extracted componentsa stronger constraint that uses higher-order statisticsinstead ...

Filipe Aires; William B. Rossow; Alain Chdin

2002-01-01T23:59:59.000Z

470

Solar-geophysical data number 582, February 1993. Part 1 (prompt reports). Data for January 1993, December 1992 and late data  

Science Conference Proceedings (OSTI)

Contents: detailed index for 1992-1993; data for january 1993; solar-terrestrial environment; iuwds alert periods (advance and worldwide); solar activity indices; solar flares; solar radio emission; stanford mean solar magnetic field; data for december 1992; solar active regions; sudden ionospheric disturbances; solar radio spectral observations; cosmic ray measurements by neutron monitor; geomagnetic indices; principal magnetic storms. Solar data is important for research in plasma physics, magnetohydrodynamics, and solar energy research.

Coffey, H.E.

1993-01-01T23:59:59.000Z

471

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103, NO. C9, PAGES 18,567-18,589, AUGUST 15, 1998 Analyses of global sea surface temperature 1856{1991  

E-Print Network (OSTI)

that impactsocieties, such as the Sahel drought or the U.S. dust bowl. In our data-driven science the study of longer

Columbia University

472

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103, NO. C9, PAGES 18,56718,589, AUGUST 15, 1998 Analyses of global sea surface temperature 1856--1991  

E-Print Network (OSTI)

in decadal cycles that impact societies, such as the Sahel drought or the U.S. dust bowl. In our data­driven science the study of longer periods quickly runs into the limita­ tions imposed by data availability

Columbia University

473

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 104, NO. A8, PAGES 17,21717,232, AUGUST, 1999 Latitudinal dynamics of auroral roar emissions  

E-Print Network (OSTI)

dynamics of auroral roar emissions S. G. Shepherd 1 and J. LaBelle Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire C. W. Carlson Space Sciences Laboratory, University of California. Auroral roar, a narrowband (f/f

Shepherd, Simon

474

GEOPHYSICAL RESEARCH LETTERS, VOL. 26, NO. 6, PAGES 667-670, MARCH 15, 1999 Observation of topside ionospheric MF/HF radio  

E-Print Network (OSTI)

ionospheric MF/HF radio emission from space S. D. Bale Space Sciences Laboratory, University of California `auroral roar', although to propa- gate to the spacecraft they must have been generated above spectrum as viewed from space. Introduction Observations of ionospheric radio emission in the MF (0.3-3 MHz

California at Berkeley, University of

475

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 101, NO. D22, PAGES 29,061-29,074, DECEMBER 20, 1996 Measurement of O3 and related compounds  

E-Print Network (OSTI)

determinedusingphotochemicalageestimatesderived from the ratios,In (n-butane/propane)andIn (/-butane/propane).Age estimatesare used

476

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 106,NO. A3, PAGES 3759-3772,MARCH 1, 2001 Alfvnic collisionless magnetic reconnection and the  

E-Print Network (OSTI)

for Plasma Research, University of Maryland, College Park, Maryland 20742 (Received 23 June 2001; published

Shay, Michael

477

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 102, NO. D23, PAGES 28,169-28,175,DECEMBER 20, 1997 Large-scaleenhancementsin NO/NOy from subsonicaircraft  

E-Print Network (OSTI)

the easternUnited States associatedwith heavy air traffic. We usea photochemical trajectorymodelto an additional in situ NOx sourcefrom the 1992Boeing-McDonnellDouglas(BMD) emissionsclimatology. Duringthe

Folkins, Ian

478

GEOPHYSICAL RESEARCH LETTERS, VOL. 9, NO. 10, PAGES 1207-1210, OCTOBEX 1982 PARTICLE SIZE DISTRIBUTION OF NITRATE AND SULFATE IN THE MARINE ATMOSPHERE  

E-Print Network (OSTI)

(also produced from gas-to-particle conversion reactions) which is present primarily on submicron of the what man-41 impaction-surf ace filters. These were extracted in Millipore filtering-centrifuge tubes

Prospero, Joseph M.

479

GEOPHYSICS, VOL. 63, NO. 4 (JULY-AUGUST 1998); P. 11371149, 10 FIGS., 1 TABLE. Electrical conductivity of steam-flooded,  

E-Print Network (OSTI)

conductivity of steam-flooded, clay-bearing geologic materials David B. Butler and Rosemary J. Knight ABSTRACT the conductivity of a steam zone by providing a surface conduction path that is enhanced strongly by temperature increases. Clay also increases the residual water saturation in a steam zone, further increasing

Knight, Rosemary

480

FINAL PROJECT REPORT: A Geophysical Characterization & Monitoring Strategy for Determining Hydrologic Processes in the Hyporheic Corridor at the Hanford 300-Area  

Science Conference Proceedings (OSTI)

The primary objective of this research was to advance the prediction of solute transport between the Uranium contaminated Hanford aquifer and the Columbia River at the Hanford 300 Area by improving understanding of how fluctuations in river stage, combined with subsurface heterogeneity, impart spatiotemporal complexity to solute exchange along the Columbia River corridor. Our work explored the use of continuous waterborne electrical imaging (CWEI), in conjunction with fiber-optic distributed temperature sensor (FO-DTS) and time-lapse resistivity monitoring, to improve the conceptual model for how groundwater/surface water exchange regulates uranium transport. We also investigated how resistivity and induced polarization can be used to generate spatially rich estimates of the variation in depth to the Hanford-Ringold (H-R) contact between the river and the 300 Area Integrated Field Research Challenge (IFRC) site. Inversion of the CWEI datasets (a data rich survey containing ~60,000 measurements) provided predictions of the distributions of electrical resistivity and polarizability, from which the spatial complexity of the primary hydrogeologic units along the river corridor was reconstructed. Variation in the depth to the interface between the overlying coarse-grained, high permeability Hanford Formation and the underlying finer-grained, less permeable Ringold Formation, an important contact that limits vertical migration of contaminants, has been resolved along ~3 km of the river corridor centered on the IFRC site in the Hanford 300 Area. Spatial variability in the thickness of the Hanford Formation captured in the CWEI datasets indicates that previous studies based on borehole projections and drive-point and multi-level sampling likely overestimate the contributing area for uranium exchange within the Columbia River at the Hanford 300 Area. Resistivity and induced polarization imaging between the river and the 300 Area IFRC further imaged spatial variability in the depth to the Hanford-Ringold inland over a critical region where borehole information is absent, identifying evidence for a continuous depression in the H-R contact between the IFRC and the river corridor. Strong natural contrasts in temperature and specific conductance of river water compared to groundwater at this site, along with periodic river stage fluctuations driven by dam operations, were exploited to yield new insights into the dynamics of groundwater-surface water interaction. Whereas FO-DTS datasets have provided meter-scale measurements of focused groundwater discharge at the riverbed along the corridor, continuous resistivity monitoring has non-invasively imaged spatiotemporal variation in the resistivity inland driven by river stage fluctuations. Time series and time-frequency analysis of FO-DTS and 3D resistivity datasets has provided insights into the role of forcing variables, primarily daily dam operations, in regulating the occurrence of focused exchange at the riverbed and its extension inland. High amplitudes in the DTS and 3D resistivity signals for long periods that dominate the stage time series identify regions along the corridor where stage-driven exchange is preferentially focused. Our work has demonstrated how time-series analysis of both time-lapse resistivity and DTS datasets, in conjunction with resistivity/IP imaging of lithology, can improve understanding of groundwater-surface water exchange along river corridors, offering unique opportunities to connect stage-driven groundwater discharge observed with DTS on the riverbed to stage-driven groundwater and solute fluctuations captured with resistivity inland.

Lee Slater

2011-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "thc geophysical methad" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

The Feasibility of Monitoring Gas Hydrate Production with Geophysical Methods Feasibility of Monitoring Gas Hydrate Production with Geophysical Methods Authors: M.B. Kowalsky...

482

Development of a seismic tomography system for use on a geotechnical centrifuge.  

E-Print Network (OSTI)

??[Truncated abstract] Seismic tomography has been extensively used in geophysics for different purposes such as geological mapping and prospecting for oil and gas. In geophysics, (more)

Rammah, Khader Ibrahim

2008-01-01T23:59:59.000Z

483

Testing and Control of a Compliant Wrist  

E-Print Network (OSTI)

'I'his rcport summarizcs thc cvaluation of a controllable, instrLlmcntcd co~npliatit wrist. 'I'hc dcsign of tlic wrist and tlic concept of;1 rcrnole ccntcr of compliancc (RCC) havc hccn dcscribcd in an carlicr rcport, (C~.1~-H1-~1'11-82-9). 'I'hc wrist is mountcd on a large industrial robot uscd to load prcciscly inachincd parts into jigs and fixturcs on computcr controllcd machine tools. 'l'he robot and thc machinc tools form part of an autornatcd ccll in which inachincd parts can bc produccd with a minimum of human intcrvcntion. I-oading parts into machine tools is cssciitially;in asscmbly opcration in which thc parts arc slid into clamps or fixtures and for this rcason die RCC tcchniqucs that havc bccn dcvelopcd for asscmbly robots can also bc applied to a machining ccll. Thc wrist cmploys sphcrical springs with an adjustable stiffncss that varics bctwccn 33 and 450 Ib/inch (5.8~10 ' and 7.9~10 ~ N/m). 'l'his allows thc ccntcr ofcompliancc to be projcctcd OVCJ a rangc froin 1.0 to 6.2 inches (25 to 157 mm) out from hc uppcr platform of the wrist. 'l'hc wrist has 5; dcgrccs of frccdom, bcing cotnp1i;rnt in cach dircction cxccpt axid cxtcnsion. Ilcflcctions of-+ 0.18 inchcs (4.6 min) in thc radial planc dnd 11.20 inchcs (5.1 mm) in comprcssion arc possible. 'l'hc accuracy of thc sensors ovcr this?vorking range is

John M. Lourtlain; P Iul K. Wright

1984-01-01T23:59:59.000Z

484

Engineered Barrier Systems Thermal-Hydraulic-Chemical Column Test Report  

SciTech Connect

The Engineered Barrier System (EBS) Thermal-Hydraulic-Chemical (THC) Column Tests provide data needed for model validation. The EBS Degradation, Flow, and Transport Process Modeling Report (PMR) will be based on supporting models for in-drift THC coupled processes, and the in-drift physical and chemical environment. These models describe the complex chemical interaction of EBS materials, including granular materials, with the thermal and hydrologic conditions that will be present in the repository emplacement drifts. Of particular interest are the coupled processes that result in mineral and salt dissolution/precipitation in the EBS environment. Test data are needed for thermal, hydrologic, and geochemical model validation and to support selection of introduced materials (CRWMS M&O 1999c). These column tests evaluated granular crushed tuff as potential invert ballast or backfill material, under accelerated thermal and hydrologic environments. The objectives of the THC column testing are to: (1) Characterize THC coupled processes that could affect performance of EBS components, particularly the magnitude of permeability reduction (increases or decreases), the nature of minerals produced, and chemical fractionation (i.e., concentrative separation of salts and minerals due to boiling-point elevation). (2) Generate data for validating THC predictive models that will support the EBS Degradation, Flow, and Transport PMR, Rev. 01.

W.E. Lowry

2001-12-13T23:59:59.000Z

485

Speciation of Antimony in PET Bottles Produced in Japan and  

E-Print Network (OSTI)

Systems Science, Hiroshima University Hiroshima 739-8526, Japan; Institute of Geology and Geophysics

Short, Daniel

486

NBS FREQUENCY AND TIME BROADCAST SERVICES  

Science Conference Proceedings (OSTI)

... CR SMITH, Secretary ... observed solar or geophysical events. ... FLARES expected PROTON FLARE expected MAGSTORM expected sss (... ...

2003-01-30T23:59:59.000Z

487

Angular redistribution of nonlinear perturbations: A universal feature of nonuniform flows W. Horton,1  

E-Print Network (OSTI)

, The Chavchavadze State University, Tbilisi 0160, Georgia 4 M. Nodia Institute of Geophysics, Tbilisi 0193, Georgia

Bowman,John C.

488

On generation of Alfvnic-like fluctuations by drift wavezonal flow system in large plasma device experiments  

E-Print Network (OSTI)

, Tbilisi 0160, Georgia and M. Nodia Institute of Geophysics, Tbilisi 0193, Georgia 3 Department of Physics

California at Los Angles, University of

489

Energy Policy Act of 2005 -Select News and Analysis WSU Extension Energy Library http://www.energy.wsu.edu/library/  

E-Print Network (OSTI)

Geological and Geophysical Data Preservation Program Act of 2005 -Title III, Section 351 Oil Shale, Tar

Collins, Gary S.

490

Feature Detection, Characterization and Confirmation Methodology: Final Report  

E-Print Network (OSTI)

Geology and structure Geophysical investigation Hydrologic and hydrogeologic properties Geochemistry and isotope

Karasaki, Kenzi

2009-01-01T23:59:59.000Z

491

Probability tails of wavelet coefficients of magnetometer records  

E-Print Network (OSTI)

variations during the IGY. Annals of International Geophysical Year 35, 49. Krankowski, A., Kosek, W., Baran

Kokoszka, Piotr

492

OCEAN DRILLING PROGRAM LEG 161 SCIENTIFIC PROSPECTUS  

E-Print Network (OSTI)

Tandon, Physical Properties Specialist (Department of Geology and Geophysics, Louisiana State University

493

ENVIRONMENT AL REVIEW for CATEGORICAL EXCLUSION DETERMINATION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Upper Molina-Lower Molina 115 kV Road Maintenance and Structure Replacement Upper Molina-Lower Molina 115 kV Road Maintenance and Structure Replacement Mesa County, CO A. Brief Description of Proposal: Montrosc maintcnance plans to do acccss road maintenancc and structure replacement on thc Upper Molina-Lower Molina 115 kV transmission line. This includes approximately 10.4 miles of access road and five structure replacements along 4.6 miles of transmission line corridor. A portion of thc structurcs will be replaced in 2011 and thc remaining structures in 2012. All of the structure replacements are on private lands. B. Number and Title of the Categorical Exclusion Being Applied: (See text in 10 CrR Part 1021, Subpart D.) B 1.3 "Routine maintenance/custodial services for buildings, structures, inJ1'astructures,

494

The use of end-to-end multicast measurements for characterizing internal network behavior  

E-Print Network (OSTI)

Wc prcscnt a novel methodology for identify-ing intcrnal iichvork performance characteristics baucd on cnd-to-end mullicnst measuretncnts. The mcthodology, solidly groiinded on statistical cstiination thcory, can bc uscd to clifiracterize the internal loss atid dciay lrrcliavior of a nct-work. Measurcnicnts on thc MI3anc havc been uscd tu validate thc approach in the case of Inss-cs. Extensive simulation experitncnts providc furihcr validaiion of the apprnacli, not only for losses, but also for delays. Wc also dcscribe our stratcgy for deploying the methodology on thc Intcrnct. This includcs the continued develop-mciit of the Naliorinl Internet Measurement hCrastriicture to support RTP-hascd cnd-to-cntl multicast ineasurcmciit ~ sild the dcvclopnicnt of software tools tu analyze the traces. Once com-plete, this combincd softwarc/hardware inlra-striicturc will providc B scrvicc for understanding and forccasting tlic pcrformancc of the Internet.

Tian Bu; Timur Friedman; Joseph Horowitz; Don Towstey; Ramn Caceres; Nick Duffietd; Francesco Lo Presti; Sue B. Moon; Sprint Atl; Vern Paxson Actr

2000-01-01T23:59:59.000Z

495

MULTIPLIER CIRCUIT  

DOE Patents (OSTI)

An electronic circuit is presented for automatically computing the product of two selected variables by multiplying the voltage pulses proportional to the variables. The multiplier circuit has a plurality of parallel resistors of predetermined values connected through separate gate circults between a first input and the output terminal. One voltage pulse is applied to thc flrst input while the second voltage pulse is applied to control circuitry for the respective gate circuits. Thc magnitude of the second voltage pulse selects the resistors upon which the first voltage pulse is imprcssed, whereby the resultant output voltage is proportional to the product of the input voltage pulses

Thomas, R.E.

1959-01-20T23:59:59.000Z

496

3D Sedimentological and geophysical studies of clastic reservoir analogs: Facies architecture, reservoir properties, and flow behavior within delta front facies elements of the Cretaceous Wall Creek Member, Frontier Formation, Wyoming  

Science Conference Proceedings (OSTI)

Significant volumes of oil and gas occur in reservoirs formed by ancient river deltas. This has implications for the spatial distribution of rock types and the variation of transport properties. A between mudstones and sandstones may form baffles that influence productivity and recovery efficiency. Diagenetic processes such as compaction, dissolution, and cementation can also alter flow properties. A better understanding of these properties and improved methods will allow improved reservoir development planning and increased recovery of oil and gas from deltaic reservoirs. Surface exposures of ancient deltaic rocks provide a high-resolution view of variability. Insights gleaned from these exposures can be used to model analogous reservoirs, for which data is sparser. The Frontier Formation in central Wyoming provides an opportunity for high-resolution models. The same rocks exposed in the Tisdale anticline are productive in nearby oil fields. Kilometers of exposure are accessible, and bedding-plane exposures allow use of high-resolution ground-penetrating radar. This study combined geologic interpretations, maps, vertical sections, core data, and ground-penetrating radar to construct geostatistical and flow models. Strata-conforming grids were use to reproduce the observed geometries. A new Bayesian method integrates outcrop, core, and radar amplitude and phase data. The proposed method propagates measurement uncertainty and yields an ensemble of plausible models for calcite concretions. These concretions affect flow significantly. Models which integrate more have different flow responses from simpler models, as demonstrated an exhaustive two-dimensional reference image and in three dimensions. This method is simple to implement within widely available geostatistics packages. Significant volumes of oil and gas occur in reservoirs that are inferred to have been formed by ancient river deltas. This geologic setting has implications for the spatial distribution of rock types (\\Eg sandstones and mudstones) and the variation of transport properties (\\Eg permeability and porosity) within bodies of a particular rock type. Both basin-wide processes such as sea-level change and the autocyclicity of deltaic processes commonly cause deltaic reservoirs to have large variability in rock properties; in particular, alternations between mudstones and sandstones may form baffles and trends in rock body permeability can influence productivity and recovery efficiency. In addition, diagenetic processes such as compaction, dissolution, and cementation can alter the spatial pattern of flow properties. A better understanding of these properties, and improved methods to model the properties and their effects, will allow improved reservoir development planning and increased recovery of oil and gas from deltaic reservoirs. Surface exposures of ancient deltaic rocks provide a high resolution, low uncertainty view of subsurface variability. Patterns and insights gleaned from these exposures can be used to model analogous reservoirs, for which data is much sparser. This approach is particularly attractive when reservoir formations are exposed at the surface. The Frontier Formation in central Wyoming provides an opportunity for high resolution characterization. The same rocks exposed in the vicinity of the Tisdale anticline are productive in nearby oil fields, including Salt Creek. Many kilometers of good-quality exposure are accessible, and the common bedding-plane exposures allow use of shallow-penetration, high-resolution electromagnetic methods known as ground-penetrating radar. This study combined geologic interpretations, maps, vertical sections, core data, and ground-penetrating radar to construct high-resolution geostatistical and flow models for the Wall Creek Member of the Frontier Formation. Stratal-conforming grids were use to reproduce the progradational and aggradational geometries observed in outcrop and radar data. A new, Bayesian method integrates outcrop--derived statistics, core observations of concretions, and radar amplitude and

Christopher D. White

2009-12-21T23:59:59.000Z

497

3D Sedimentological and geophysical studies of clastic reservoir analogs: Facies architecture, reservoir properties, and flow behavior within delta front facies elements of the Cretaceous Wall Creek Member, Frontier Formation, Wyoming  

SciTech Connect

Significant volumes of oil and gas occur in reservoirs formed by ancient river deltas. This has implications for the spatial distribution of rock types and the variation of transport properties. A between mudstones and sandstones may form baffles that influence productivity and recovery efficiency. Diagenetic processes such as compaction, dissolution, and cementation can also alter flow properties. A better understanding of these properties and improved methods will allow improved reservoir development planning and increased recovery of oil and gas from deltaic reservoirs. Surface exposures of ancient deltaic rocks provide a high-resolution view of variability. Insights gleaned from these exposures can be used to model analogous reservoirs, for which data is sparser. The Frontier Formation in central Wyoming provides an opportunity for high-resolution models. The same rocks exposed in the Tisdale anticline are productive in nearby oil fields. Kilometers of exposure are accessible, and bedding-plane exposures allow use of high-resolution ground-penetrating radar. This study combined geologic interpretations, maps, vertical sections, core data, and ground-penetrating radar to construct geostatistical and flow models. Strata-conforming grids were use to reproduce the observed geometries. A new Bayesian method integrates outcrop, core, and radar amplitude and phase data. The proposed method propagates measurement uncertainty and yields an ensemble of plausible models for calcite concretions. These concretions affect flow significantly. Models which integrate more have different flow responses from simpler models, as demonstrated an exhaustive two-dimensional reference image and in three dimensions. This method is simple to implement within widely available geostatistics packages. Significant volumes of oil and gas occur in reservoirs that are inferred to have been formed by ancient river deltas. This geologic setting has implications for the spatial distribution of rock types (\\Eg sandstones and mudstones) and the variation of transport properties (\\Eg permeability and porosity) within bodies of a particular rock type. Both basin-wide processes such as sea-level change and the autocyclicity of deltaic processes commonly cause deltaic reservoirs to have large variability in rock properties; in particular, alternations between mudstones and sandstones may form baffles and trends in rock body permeability can influence productivity and recovery efficiency. In addition, diagenetic processes such as compaction, dissolution, and cementation can alter the spatial pattern of flow properties. A better understanding of these properties, and improved methods to model the properties and their effects, will allow improved reservoir development planning and increased recovery of oil and gas from deltaic reservoirs. Surface exposures of ancient deltaic rocks provide a high resolution, low uncertainty view of subsurface variability. Patterns and insights gleaned from these exposures can be used to model analogous reservoirs, for which data is much sparser. This approach is particularly attractive when reservoir formations are exposed at the surface. The Frontier Formation in central Wyoming provides an opportunity for high resolution characterization. The same rocks exposed in the vicinity of the Tisdale anticline are productive in nearby oil fields, including Salt Creek. Many kilometers of good-quality exposure are accessible, and the common bedding-plane exposures allow use of shallow-penetration, high-resolution electromagnetic methods known as ground-penetrating radar. This study combined geologic interpretations, maps, vertical sections, core data, and ground-penetrating radar to construct high-resolution geostatistical and flow models for the Wall Creek Member of the Frontier Formation. Stratal-conforming grids were use to reproduce the progradational and aggradational geometries observed in outcrop and radar data. A new, Bayesian method integrates outcrop--derived statistics, core observations of concretions, and radar amplitude and

Christopher D. White

2009-12-21T23:59:59.000Z

498

3-D sedimentological and geophysical studies of clastic reservoir analogs: Facies architecture, reservoir properties, and flow behavior within delta front facies elements of the Cretaceous Wall Creek Member, Frontier Formation, Wyoming  

SciTech Connect

This project examined the internal architecture of delta front sandstones at two locations within the Turonian-age Wall Creek Member of the Frontier Formation, in Wyoming. The project involved traditional outcrop field work integrated with core-data, and 2D and 3D ground penetrating radar (GPR) imaging from behind the outcrops. The fluid-flow engineering work, handled through a collaborative grant given to PI Chris White at LSU, focused on effects on fluid flow of late-stage calcite cement nodules in 3D. In addition to the extensive field component, the work funded 2 PhD students (Gani and Lee) and resulted in publication of 10 technical papers, 17 abstracts, and 4 internal field guides. PI Bhattacharya also funded an additional 3 PhD students that worked on the Wall Creek sandstone funded separately through an industrial consortium, two of whom graduated in the fall 2006 ((Sadeque and Vakarelov). These additional funds provided significant leverage to expand the work to include a regional stratigraphic synthesis of the Wall Creek Member of the Frontier Formation, in addition to the reservoir-scale studies that DOE directly funded. Awards given to PI Bhattacharya included the prestigious AAPG Distinguished Lecture Award, which involved a tour of about 25 Universities and Geological Societies in the US and Canada in the fall of 2005 and Spring of 2006. Bhattacharya gave two talks, one entitled Applying Deltaic and Shallow Marine Outcrop Analogs to the Subsurface, which highlighted the DOE sponsored work and the other titled Martian River Deltas and the Origin of Life. The outcrop analog talk was given at about 1/2 of the venues visited.

Janok P. Bhattacharya; George A. McMechan

2007-02-16T23:59:59.000Z

499

Gamma Radiation Dose Rate in Air due to Terrestrial Radionuclides in Southern Brazil: Synthesis by Geological Units and Lithotypes Covered by the Serra do Mar Sul Aero?Geophysical Project  

Science Conference Proceedings (OSTI)

The absorbed dose rates in air due to terrestrial radionuclides were estimated from aerial gamma spectrometric data for an area of 48

Rodrigo O. Bastos; Carlos R. Appoloni; Jos P. P. Pinese

2008-01-01T23:59:59.000Z

500

ITER Predictions Using the GYRO Verified and Experimentally Validated TGLF Transport Model (A26874)  

E-Print Network (OSTI)

Proceedings Of 23rd IAEA Fusion Energy Conference, October 11-16, 2010, Daejeon, Republic Of Korea, Http://www-pub.iaea.org/mtcd/meetings/cn180_papers.asp, Paper THC/3-0323rd IAEA Fusion Energy Conference Daejeon, KP, 2010999617985

Kinsey, J.E.

2010-11-12T23:59:59.000Z