Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields

Moraga, Jim

doi:10.15121/1824162

Title: Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields

Dataset
Other Related Research

Abstract

Results of the analysis of HyMap's spectra against know hydrothermally altered minerals in the Brady-Desert Peak Geothermal Areas. The analysis was performed using ENVI's Target Detection process against USGS library spectra for Chalcedony, Kaolinite, Gypsum, Hematite and Epsomite. Each compressed file includes three raster images created after fusing the target detection results for all minerals: _fusion_all - Contains the 8 layers resulting from target detection and fusion of the 5 minerals _fusion_all_normal - Contains each layer as above, after Winsorization (99% percentile on the positive side only due to skewness of results), and normalization of each layer to achieve a range between [0-1] _fusion_final - Contains a fused raster by sub-setting the normalized layers, with the results of MTMF, MTTCIMF, OSP and SAM. Both CEM and MF were discarded as being less accurate than MTMF, and TCIMF is less accurate than MTTCIMF, ACE results were discarded because they were notably different from the rest of the analyses. The base_names are: brady - Brady geothermal area only desert - Desert Peak geothermal area only hymap - Full image analysis comprising both the Brady and Desert Peak geothermal areas

Authors:

Publication Date:: 2021-10-01

Other Number(s):: 1334

DOE Contract Number:: EE0008760

Research Org.:: USDOE Geothermal Data Repository (United States); Colorado School of Mines, Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)

Collaborations:: Colorado School of Mines

Subject:: 15 Geothermal Energy

Keywords:: geothermal; energy; hydrothermal mineral alterations; mineral markers; HyMap; Brady; Desert Peak; data fusion; geospatial data; mineral alterations; spectral analysis; target detection; remote sensing; data; processed data; geothermal area; Nevada

Geolocation:: 39.9883,-118.8167|39.5883,-118.8167|39.5883,-119.2167|39.9883,-119.2167|39.9883,-118.8167

OSTI Identifier:: 1824162

DOI:: https://doi.org/10.15121/1824162

Project Location:

Citation Formats


                    Moraga, Jim. Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields.  United States: N. p., 2021. 
        Web.  doi:10.15121/1824162.

Copy to clipboard


                    Moraga, Jim. Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields.  United States.  doi:https://doi.org/10.15121/1824162

Copy to clipboard


                    Moraga, Jim. 2021.  
"Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields".  United States.  doi:https://doi.org/10.15121/1824162.  https://www.osti.gov/servlets/purl/1824162. Pub date:Fri Oct 01 00:00:00 EDT 2021

Copy to clipboard


                    
@article{osti_1824162,

  title        = {Hydrothermal mineral alterations in the Brady and Desert Peak geothermal fields},

  author       = {Moraga, Jim},

  abstractNote = {Results of the analysis of HyMap's spectra against know hydrothermally altered minerals in the Brady-Desert Peak Geothermal Areas. The analysis was performed using ENVI's Target Detection process against USGS library spectra for Chalcedony, Kaolinite, Gypsum, Hematite and Epsomite. Each compressed file includes three raster images created after fusing the target detection results for all minerals: _fusion_all - Contains the 8 layers resulting from target detection and fusion of the 5 minerals _fusion_all_normal - Contains each layer as above, after Winsorization (99% percentile on the positive side only due to skewness of results), and normalization of each layer to achieve a range between [0-1] _fusion_final - Contains a fused raster by sub-setting the normalized layers, with the results of MTMF, MTTCIMF, OSP and SAM. Both CEM and MF were discarded as being less accurate than MTMF, and TCIMF is less accurate than MTTCIMF, ACE results were discarded because they were notably different from the rest of the analyses. The base_names are: brady - Brady geothermal area only desert - Desert Peak geothermal area only hymap - Full image analysis comprising both the Brady and Desert Peak geothermal areas},

  doi          = {10.15121/1824162},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2021},

  month        = {10}

}

Copy to clipboard

Dataset:

View Dataset

DOI: https://doi.org/10.15121/1824162

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Data Explorer and OSTI.GOV collections:

Geothermal Mineral Alterations in Brady and Desert Peak

Dataset Moraga, Jim

Results of the analysis of HyMap's spectra against know hydrothermally altered minerals in the Brady-Desert Peak Geothermal Areas. This is the post-processing results and final analysis results of applying target detection algorithms and then fusing the results.
Training dataset and results for geothermal exploration artificial intelligence, applied to Brady Hot Springs and Desert Peak

Dataset Moraga, Jim

The submission includes the labeled datasets, as ESRI Grid files (.gri, .grd) used for training and classification results for our machine leaning model: - brady_som_output.gri, brady_som_output.grd, brady_som_output.* - desert_som_output.gri, desert_som_output.grd, desert_som_output.* The data corresponds to two sites: Brady Hot Springs and Desert Peak, both located near Fallon, NV. Input layers include: - Geothermal: Labeled data (0: Non-geothermal; 1: Geothermal) - Minerals: Hydrothermal mineral alterations, as a result of spectral analysis using Chalcedony, Kaolinite, Gypsum, Hematite and Epsomite - Temperature: Land surface temperature (% of times a pixel was classified as "Hot" by K-Means) - Faults: Fault density with a 300mradiusmore »« less
3-D Geologic Controls of Hydrothermal Fluid Flow at Brady Geothermal Field, Nevada using PCA

Dataset Siler, Drew ; Pepin, Jeff D.

In many hydrothermal systems, fracture permeability along faults provides pathways for groundwater to transport heat from depth. Faulting generates a range of deformation styles that cross-cut heterogeneous geology, resulting in complex patterns of permeability, porosity, and hydraulic conductivity. Vertical connectivity (a through going network of permeable areas that allows advection of heat from depth to the shallow subsurface) is rare and is confined to relatively small volumes that have highly variable spatial distribution. This local compartmentalization of connectivity represents a significant challenge to understanding hydrothermal circulation and for exploring, developing, and managing hydrothermal resources. Here, we present an evaluation ofmore »« less
Shear Induced Permeability Test: Brady and Desert Peak Core X-Ray CT Files

Dataset Kneafsey, Tim

As part of the shear induced permeability test, the rock cores were also scanned with X-ray Computed Tomography (CT) before and after sustainability tests using a modified GE Lightspeed 16 medical CT scanner. The CT provides another perspective on the fracture and aperture, as well as the mineral distribution near the aperture. This submission includes the photos of core segments examined from Brady well BCH-03 and Desert Peak well DP 35-13. X-ray CT data is provided for the BCH-03 and DP 35-13 core segments.
Post-Test SEM Examination of Brady Core, Desert Peak Core, and Stripa Granite Samples

Dataset Kneafsey, Tim

As part of the shear-induced permeability test of Brady well BCH-03, Desert Peak well DP 35-13, and Stripa granite samples, the three post-test (reacted) rock samples were examined using a Scanning Electron Microscope (SEM). The SEM images of the core and elemental analysis are included in this submission for each sample.

Similar Records