Fig. 8
From: Three-dimensional geologic mapping to assess geothermal potential: examples from Nevada and Oregon
a 3D geologic map of the Neal Hot Springs geothermal field. View direction is to the north. Quaternary opaline silica sinter is show in green. Fluid upwelling (red wells are production wells) is interpreted to be controlled by a left step-over (or relay ramp) between two west-dipping normal faults, the Neal fault to the east and the Sugarloaf Butte fault to the west (both in red), and the associated high-density faulting within the step-over (gray faults). b 3D model of logarithm of distance to input data (lithologic data along wells, surficial geophysical and 2D geologic map data, and 2D geologic cross sections and seismic reflection profiles) to the Neal model. Cross section shown, sliced east–west though the geothermal field is the same as a. High data density in the Neal step-over suggests that the 3D geologic relationships in this area are well constrained relative to areas of sparse data