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Title: Geologic Map of the Organ Mountains and Southern San Andres Mountain Range, NM

Abstract

This is a digitized geologic map, in shapefile format, including rock unit lithological descriptions, faults, and dikes.

Authors:
;
Publication Date:
Research Org.:
DOE Geothermal Data Repository; Energy and Geoscience Institute at the University of Utah
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
OSTI Identifier:
1364773
Report Number(s):
934
DOE Contract Number:
EE0006730
Resource Type:
Data
Data Type:
Specialized Mix
Country of Publication:
United States
Availability:
GDRHelp@ee.doe.gov
Language:
English
Subject:
15 Geothermal Energy; geology; new mexico; map; faults; san andres; organ mountains; dikes; lithology; geologic layer; geologic map; stratigraphy; shape file; shapefile; ArcGIS; GIS; geospatial

Citation Formats

Nash, Greg, and Seager, William. Geologic Map of the Organ Mountains and Southern San Andres Mountain Range, NM. United States: N. p., 2017. Web. doi:10.15121/1364773.
Nash, Greg, & Seager, William. Geologic Map of the Organ Mountains and Southern San Andres Mountain Range, NM. United States. doi:10.15121/1364773.
Nash, Greg, and Seager, William. 2017. "Geologic Map of the Organ Mountains and Southern San Andres Mountain Range, NM". United States. doi:10.15121/1364773. https://www.osti.gov/servlets/purl/1364773.
@article{osti_1364773,
title = {Geologic Map of the Organ Mountains and Southern San Andres Mountain Range, NM},
author = {Nash, Greg and Seager, William},
abstractNote = {This is a digitized geologic map, in shapefile format, including rock unit lithological descriptions, faults, and dikes.},
doi = {10.15121/1364773},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 6
}

Dataset:

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  • The Rio Bonito Member of the San Andres Formation records a transgression of the northwestern shelf during the late Leonardian. Late Leonardian to Guadalupian marine carbonates exposed in the Sacramento Mountains relate a marked change from equatorial tidal flat rocks of the middle Leonardian Yeso Formation. These rocks were deposited during a worldwide sea level lowstand. The Yeso-San Andres contact, previously thought to be a gradational boundary, is here interpreted as a flooding surface resulting from the eustatic sea level rise after the lowstand. Inundation of the northwestern shelf led to deposition of the thick Andres Formation marine limestone sequencemore » within a shallow-lagoon or shelf setting. Depositional environments are predominantly subtidal and intertidal. Microfacies include packstones of comminuted bioclasts of normal saline affinities redistributed by light currents. These shoal upward at times to Dasycladacean algal grainstones interpreted as tidal bars prograding across the lagoon or shelf. More restricted wackestones and laminated mudstones occur at the base of the section and indicate a transition from tidal flat to submerged shelf. Aggradation of sediment into the intertidal zone may have occurred cyclically during San Andres deposition. One such cycle is present over the interval exposed in the Sacramento Mountains. Intertidal rocks resemble tidal flat deposits of dolostone, carbonate mudstones, and a thin tongue of quartzarenite interpeted to be Glorieta Sandstone. These rocks were previously attributed to interginguing of the Yeso with the San Andres.« less
  • More than 10 coal beds of Pennsylvanian age crop out around Sand Mountain and Lookout Mountain in Georgia, Tennessee, and Alabama. These beds were deposited in barrier and fluvial environments. Few determinations of modern coal-quality data have been made for these coals, although they have been mined for more than 100 years. To evaluate their quality, 47 coal samples from beds 1, 2, 3, 4, 5, 5A, 6, 8, 9, 9A, and 10 were analyzed for ultimate and proximate values, calorific values, forms of sulfur, ash-fusion temperatures, free-swelling indices, and 60 major and minor, and trace-element concentrations. Most samples havemore » less than 1% total sulfur and have low pyritic and organic sulfur contents. The ash content has geometric mean value of about 8%. The mean calorific value is just above 13,000; some samples have values above 15,000 Btu. The calculated coal rank ranges from low to medium volatile bituminous. However, the rank reverses in the Lookout Mountain coal, suggesting possible tectonic intervention. Because of high free-swelling indices and low concentrations of volatiles, sulfur, and as, most of these coal beds contain premium quality metallurgical or metallurgical-blend coal. In some coal beds, the concentrations of CaO, Na/sub 2/O, P/sub 2/O/sub 5/, MgO, and chlorine show wide differences from the overall geometric mean, indicating changing deposition or tectonic conditions. The geometric mean concentrations of minor and trace lithophile elements do not display large differences when compared to other eastern US bituminous coal samples. Chalcophile elements such as silver, arsenic, cobalt, mercury, selenium, and zinc are present in concentrations that may be related to depositional or diagenetic processes. Antimony content is high in some samples.« less
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