This three-dimensional (3D) geologic map displays the subsurface geology in the upper ~4 kilometers of the Earth’s crust in the southeastern Gabbs Valley geothermal area of west-central Nevada. The 3D map was constructed by integrating the results from detailed geologic mapping, 3D gravity inversion modeling, and potential-field-geophysical studies. This effort was undertaken as part of the Nevada Play Fairway Project, a regional effort to characterize new geothermal resources in the United States. Local data collection and analysis in southeastern Gabbs Valley, Nevada, including the construction of this 3D map, led to the drilling of six temperature gradient wells and identification of previously unknown hydrothermal fluids at 150 meters depth. The measured temperatures, which are as high as 124.9 degrees Celsius, indicate that the southeastern Gabbs Valley hydrothermal system has temperatures that are comparable to geothermal fields that have been developed for electricity generation in the region. We describe the geologic units and structures displayed by the map and discuss the methods used to integrate the geologic and geophysical information into the 3D geologic interpretation. The accompanying map provides horizontal and vertical section views and oblique perspective views from several angles. The digital data for elements of the map, the individual 3D fault surfaces, and stratigraphic surfaces are available from Siler (2022). The accompanying map sheet and video displaying the 3D map are available at https://doi.org/10.3133/sim3498.
|Title||Three-dimensional geologic map the southeastern Gabbs Valley geothermal area, Nevada|
|Authors||Drew L. Siler, Jeffrey B. Witter, Jason W Craig, Tait E. Earney, William D. Schermerhorn, Dominique Fournier, James E. Faulds, Jonathan M.G. Glen, Jared R. Peacock|
|Publication Subtype||USGS Numbered Series|
|Series Title||Scientific Investigations Map|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Geology, Minerals, Energy, and Geophysics Science Center|
Stratigraphic and fault surfaces from the Three-Dimensional Geologic Map of the southeastern Gabbs Valley Geothermal Area
Stratigraphic and fault surfaces from the Three-Dimensional Geologic Map of the southeastern Gabbs Valley Geothermal AreaThis digital dataset represents the 3D fault and stratigraphic surfaces of the three dimensional geologic map of the southeastern Gabbs Valley, Nevada. The data define the easting, northing, and elevations (meters, NAD 83 Zone 11N) of points that define the top and bottom contacts of stratigraphic units and fault surfaces.