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Our research focuses on developing methods to analyze volcano-hydrothermal systems and on the application of these methods to particular volcanic systems in the western United States. Specific research questions include (1) What are the modes of heat and mass transport from magma to the shallow subsurface? (2) What are the pressure, temperature, and fluid-saturation conditions between magma and the land surface? (3) What controls the permeability of volcanoes? How does it vary in space and time? What role do temporal variations in permeability play in the evolution of volcanogenic hydrothermal systems and episodes of volcanic unrest? (4) How well-coupled are various fluid flow, transport, and mechanical deformation...
Quantitative understanding of groundwater and gas-rich fluid- and thermodynamics in volcanic areas is important for several reasons: 1) as a major source of hazard such as propellant in steam-driven explosions, lubricant in mudflows, and transport agent for toxic constituents such as arsenic and mercury that are dissolved from fresh volcanic rock, 2) groundwater pressure, temperature and chemical changes might signal one of the earliest warnings of volcanic unrest, 3) exploration and mining of geothermal energy and mineral deposits. Many of the geochemical, geodetic, and seismic signals measured at the ground surface as part of the volcano monitoring strategies have hydrothermal origins or magmatic origins modulated...
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The National Geologic Map Database (NGMDB) is a Congressionally mandated national archive of geoscience maps, reports, and stratigraphic information. The Geologic Mapping Act of 1992 and its Reauthorizations calls for the U.S. Geological Survey and the Association of American State Geologists (AASG) to cooperatively build this national archive, according to technical and scientific standards whose development is coordinated by the NGMDB. The NGMDB consists of a comprehensive set of publication citations, stratigraphic nomenclature, downloadable content in raster and vector formats, unpublished source information, and guidance on standards development. The NGMDB contains information on more than 110,000 maps and...
Tags: AASG, Aeromagnetics, Association of American State Geologists, Bedrock geology, CSS, All tags...
ABSTRACT Deep within the earth there exist immense reservoirs of energy in the form of heat-commonly referred to as geothermal resources. Unfortunately, most of these resources are at such depths that it is unlikely they will be recoverable in the foreseeable future. Nevertheless, the lure of seemingly inexhaustible amounts of relatively clean energy continues to hold a fascination for man. In certain limited situations man has already been able to tap these reservoirs and harness the energy to his own uses. More of this activity can be expected in the future. While geothermal energy will chiefly be used to produce electric power, persons responsible for water resources management must concern themselves with geothermal...
Categories: Publication; Types: Citation; Tags: geothermal resources, water law
The data in the csv and text files provided in this release are an update to the data tables originally published in USGS Open-File Report (OFR) 83-250 (https://doi.org/10.3133/cir892). Those data were published as paper tables and have until now only been available as pdf image documents that were not machine readable. USGS OFR 83-250 presented data for 2071 geothermal sites which are representative of 1168 low-temperature geothermal systems identified in 26 states. The low-temperature geothermal systems consist of 978 isolated hydrothermal-convection systems, 148 delineated-area hydrothermal-convection systems, and 42 delineated-area conduction-dominated systems. The basic data and estimates of reservoir conditions...
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The U.S. Geological Survey (USGS) and the Department of Energy (DOE) have collaborated to acquire high-resolution airborne magnetic and radiometric data, over northern and western Nevada and eastern California, to support geologic and geophysical mapping and modeling that will assist geothermal and critical mineral studies. The surveys, referred to as GeoDAWN (Geoscience Data Acquisition for Western Nevada), span areas of major resource potential associated with the Walker Lane and western Great Basin. They were conducted under the USGS’s Earth Mapping Resource Initiative (EarthMRI), with support from the DOE’s Geothermal Technologies Office (GTO), and involved acquisition of aeroradiometric and aeromagnetic data...
Reconnaissance and chemical and isotope sampling of thermal springs in the western United States has not generally provided information of sufficient detail to permit the geothermal potential of most individual areas to be determined with any certainty. This is especially true in the Cascade Mountain Range, where the chemical geothermometers indicate much lower temperatures of water-rock equilibrium than the sulfate-isotope geothermometer and the geologic setting seem to require. This discrepancy could be due to simple mixing of thermal and fresh water or rapid equilibration of water with the surrounding country rock as the fluids rise to the surface; alternatively, the sulfate-isotopic composition could be an artifact...
In the beginning of this new century, the rational use of energy becomes a keyword for the world sustainable development both in developed and developing countries. Geothermal resources have the potential of contributing significantly to sustainable energy use in many parts of the world. Geothermal energy has been used commercially for about one century and its large-scale utilization (hundreds of MW) started about 40 years ago, both for electricity generation and for direct application as space heating and combined with heat pumps. The technology, reliability, economics, and environmental acceptability of direct use of geothermal energy have been demonstrated throughout the world. The aim of the present article...
ABSTRACT Deep within the earth there exist immense reservoirs of energy in the form of heat-commonly referred to as geothermal resources. Unfortunately, most of these resources are at such depths that it is unlikely they will be recoverable in the foreseeable future. Nevertheless, the lure of seemingly inexhaustible amounts of relatively clean energy continues to hold a fascination for man. In certain limited situations man has already been able to tap these reservoirs and harness the energy to his own uses. More of this activity can be expected in the future. While geothermal energy will chiefly be used to produce electric power, persons responsible for water resources management must concern themselves with geothermal...
Categories: Publication; Types: Citation; Tags: geothermal resources, water law
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This package contains data in a portion of northern Nevada, the extent of the ‘Nevada Machine Learning Project’ (DE-EE0008762). Slip tendency (TS) and dilation tendency (TD) were calculated for the all the faults in the Nevada ML study area. TS is the ratio between the shear components of the stress tensor and the normal components of the stress tensor acting on a fault plane. TD is the ratio of all the components of the stress tensor that are normal to a fault plane. Faults with higher TD are relatively more likely to dilate and host open, conductive fractures. Faults with higher TS are relatively more likely to slip, and these fractures may be propped open and conductive. These values of TS and TD were used to...
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This package contains a map surface that depicts the estimated spatial variation of conductive heat flow (mW/m²) in a portion of northern Nevada, the extent of the ‘Nevada Machine Learning Project’ (DE-EE0008762). It was generated using well locations that had an estimated heat flow value from a measured thermal gradient and thermal conductivity, mainly using data from Southern Methodist University, with some additional USGS data. Well data are included along with and a map surface depicting estimated standard error of the heat flow interpolation.
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This data release contains all digital geographic data used and produced by the Snake River Plain Play Fairway Analysis (DE EE0006733) for Phase 1 (ArcGIS shapefiles and raster files) as well as the model processing script, tables, and documentation used to generate data outputs. Brief descriptions of data layers are in the metadata of GIS files, greater detail is available in the ‘Larger Work,' the Snake River Plain Play Fairway Analysis Phase 1 report. A link to the report is available in the ‘Related External Resources’ section.
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This geodatabase reflects the U.S. Geological Survey’s (USGS) ongoing commitment to its mission of understanding the nature and distribution of global mineral commodity supply chains by updating and publishing the georeferenced locations of mineral commodity production and processing facilities, mineral exploration and development sites, and mineral commodity exporting ports in Africa. The geodatabase and geospatial data layers serve to create a new geographic information product in the form of a geospatial portable document format (PDF) map. The geodatabase contains data layers from USGS, foreign governmental, and open-source sources as follows: (1) mineral production and processing facilities, (2) mineral exploration...
Tags: Africa, Algeria, Angola, Benin, Botswana, All tags...
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These data were compiled to provide satellite remote sensing observations of landcover in the vicinity of wetlands fed by geothermal springs in Dixie Meadows, Nevada, USA. Objectives of the study were to map landcover of water, vegetation, and soil between October 5, 2015, and January 21, 2022, using available imagery from the Sentinel-2 mission. The U.S. Geological Survey's Southwest Biological Science Center (SBSC) and Grand Canyon Monitoring and Research Center (GCMRC) processed 110 Sentinel-2 satellite images representing bottom of atmosphere surface reflectance and classified them within Google Earth Engine (GEE) using threshold values of the Green Normalized Difference Vegetation Index (gNDVI) and its inverse...
Categories: Data; Tags: Bureau of Land Management Lands, Churchill County, Department of Defense Lands, Dixie Meadows, Dixie Valley, All tags...
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During the summers of 2017 and 2020, our team collected gravity, ground magnetic (ATV and hiked traverses), paleomagnetic and rock property (density and susceptibility) data on the Umatilla Indian Reservation (UIR) in northeast Oregon to aid in characterizing subsurface stratigraphy using 2D and 3D modeling methods. This data was integrated with conductance surfaces from a 3D magnetotelluic model and regional stress data to generate geothermal resource favorability maps to inform future exploration and drilling efforts by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR).
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This package contains gravity and magnetics data and products generated for the Nevada Machine Learning (NVML) project (DE-FOA-0001956). Data products contained in this release consist of grids and vector data. Grids include: primary anomaly maps (isostatic and PSG), match-filtered maps, horizontal gradient (HG) maps, confidence maps, and maps showing density of specific key structural features. The vector data in this release include the gravity stations, HGM of gravity and magnetics, ‘generalized’ lineations for gravity and magnetics, gravity and magnetic lineation terminations and intersections, and ‘well-constrained’ HGM saddles.
Reconnaissance and chemical and isotope sampling of thermal springs in the western United States has not generally provided information of sufficient detail to permit the geothermal potential of most individual areas to be determined with any certainty. This is especially true in the Cascade Mountain Range, where the chemical geothermometers indicate much lower temperatures of water-rock equilibrium than the sulfate-isotope geothermometer and the geologic setting seem to require. This discrepancy could be due to simple mixing of thermal and fresh water or rapid equilibration of water with the surrounding country rock as the fluids rise to the surface; alternatively, the sulfate-isotopic composition could be an artifact...
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This coverage shows the area of significant lateral extent favorable for discovery and development of local sources of low-temperature (<90 C) water. Areas are defined on the basis of thermal springs, wells, and geohydrologic settings generally favorable for recovery of thermal water. Existing knowledge does not in general permit the inference that thermal water may be found everywhere within the depicted areas, nor do the boundaries represent certain knowledge of the areal extend of the geothermal systems.
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These data are a compilation of 379 borehole temperature profiles collected during the period 1972 through 2018 for the Mesilla Basin, New Mexico. This dataset includes a comma-separated values file (Temperature Profile Index.csv) that serves as an index for the 379 text data files (.txt; with the file name corresponding to the “Well Name” in the index) that are included as a compressed (.zip) folder. Each data file contains header information that allows cross-referencing the sample location with other USGS databases and summarizes sample date, method of measurement, and the type of borehole. Following the header is a list of depths below ground surface with corresponding temperature measurements (a temperature...
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A detailed aeromagnetic survey of Mono Basin and Long Valley, California was flown by EON Geosciences Inc. from October 25th to November 11th, 2012. The high-resolution helicopter survey was flown at a flightline spacing of 400 m, a flightline azimuth of 65 degrees, a nominal flightline elevation above ground of 150 m, and consists of about 6,125 line-kilometers. Tie lines were spaced at a 4-km interval with a flightline azimuth of 155 degrees. A Scintrex CS-3 cesium magnetometer was used throughout the airborne survey and a GEM Systems GSM-19 magnetometer was used as a base station magnetometer located near the Mammoth Lake Yosemite airport. Data were processed by the contractor and include corrections for diurnal...


map background search result map search result map Regions of Known or Potential Geothermal Resources, Utah High-Resolution Aeromagnetic Survey of Mono Basin and Long Valley, California Borehole temperature profiles measured in the Mesilla Basin, New Mexico during the period 1972 through 2018 Digital data from USGS OFR 83-250: Selected data for low-temperature (less than 90 degrees C) geothermal systems in the United States; reference data for U.S. Geological Survey Circular 892 Snake River Plain Play Fairway Analysis Phase 1 Favorability Model (DE EE0006733) Geophysical characterization of geothermal resources on the Umatilla Indian Reservation in northeast Oregon Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of Africa USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Geophysics Data USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Heat Flow Data USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Slip and Dilation Tendency Data Land cover classification data for wetland complexes at Dixie Meadows, Nevada from October 2015 to January 2022 GeoDAWN: Airborne magnetic and radiometric surveys of the northwestern Great Basin, Nevada and California USGS National Geologic Map Database Collection Land cover classification data for wetland complexes at Dixie Meadows, Nevada from October 2015 to January 2022 Geophysical characterization of geothermal resources on the Umatilla Indian Reservation in northeast Oregon Borehole temperature profiles measured in the Mesilla Basin, New Mexico during the period 1972 through 2018 USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Geophysics Data USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Heat Flow Data USGS Contributions to the Nevada Geothermal Machine Learning Project (DE-FOA-0001956): Slip and Dilation Tendency Data GeoDAWN: Airborne magnetic and radiometric surveys of the northwestern Great Basin, Nevada and California Snake River Plain Play Fairway Analysis Phase 1 Favorability Model (DE EE0006733) Regions of Known or Potential Geothermal Resources, Utah Digital data from USGS OFR 83-250: Selected data for low-temperature (less than 90 degrees C) geothermal systems in the United States; reference data for U.S. Geological Survey Circular 892 USGS National Geologic Map Database Collection Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of Africa