| Title | Provisional Conceptual Model of the Camas Prairie (ID) Geothermal System from Play Fairway Analysis |
|---|---|
| Authors | John W. SHERVAIS, Jonathan M. GLEN, Drew SILER, Jacob DEANGELO, Lee M. LIBERTY, Dennis L. NIELSON, Sabodh GARG, Ghanashyam NEUPANE, Patrick DOBSON, Erika GASPERIKOVA, Eric SONNENTHAL, Dennis L. NEWELL, James P. EVANS, Neil SNYDER |
| Year | 2018 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Play Fairway Analysis, Snake River Plain, Conceptual Model |
| Abstract | Camas Prairie, Idaho, is an EW-trending structural half-graben that lies north of the Snake River Plain hotspot track. It is bounded on the north by the Idaho Batholith, and on the south by the Mount Bennett Hills (MBH). This region was investigated by the SRP Geothermal Play Fairway Analysis team, which included focused geologic, geochemical, and geophysical studies. The Camas Prairie geothermal system resource is indicated by warm springs and wells, geophysical analysis of buried faults and basins, mapped faults, structural analysis of all faults and lineaments, high He R/Ra, cation and multicomponent geothermometry, and the occurrence of young basalt vents and lava flows along the range front. Our provisional conceptual model includes the following components: (1) Permeability is indicated by the confluence of intersecting faults, including the major range front system and The Pothole fault system, with releasing bends as deduced from detailed field studies, and the presence of springs along mapped structural features; (2) Heat is inferred to result from mid- to shallow crustal sills, as evidenced by the location of vents along the range front; the youngest dated vent is 692 ka, but 2 ka vents lie to NW; (3) Seal is indicated by MT studies, which suggest a clay seal over the prospective target area that is likely a result of hydrothermal alteration. |