Fig. 7

a 3D geologic map, selected cross sections (Dering 2013) and well data from the Tuscarora geothermal field. View direction is to the north. Fluid upwelling is interpreted to be controlled by intersecting oppositely dipping faults in the axial part of an anticlinal accommodation zone. Geothermal production wells (red) and injection wells (dark blue are the proximal, light blue are the distal injection wells) are shown for reference. The black wells are other deep wells with lithologic data. Black arrow marks the anticlinal accommodation zone where fluid upwelling is focused. Cross section shown is through the geothermal field, sliced along azimuth 105. b 3D model of logarithm of distance to data at Tuscarora, sliced at the same latitude as a. There are dense data (several wells and a cross section) in the heart of the geothermal field suggesting that the 3D geologic relationships in the near surface (where the surficial geology is mapped in detail) in this area are well constrained relative to areas of more sparse data