- Major Normal Fault
- Termination of a Major Normal Fault
- Stepover or Relay Ramp in Normal Fault Zones
- Apex or Salient of Normal Fault
- Fault Intersection
- Accommodation Zone
- Displacement Transfer Zone
Faulds uses these terms (fault intersection and a subset classification - displacement transfer zone) as structural controls found in the Basin and Range province of the US.
Fault intersections between normal faults and transversely oriented strike-slip or oblique-slip faults account for 22% of the Basin & Range structures known to host geothermal systems as of 2011. Multiple minor faults in these areas create connections between major structures, allowing fluids to flow through highly fractured dilational quadrants.[1]
Displacement transfer zones represent a major subset of fault intersection types, hosting 5% of the known geothermal systems in the Basin & Range. Intersections between strike-slip faults in the Walker Lane and N- to NNE-striking normal faults commonly host geothermal systems, focused along the normal faults proximal to their dilational intersections with nearby dextral faults.[1]
Want to add an example to this list? Select a Geothermal Resource Area to edit its "Controlling Structures" property using the "Edit with Form" option.
CSVGeothermal Resource Area | Geothermal Region | Tectonic Setting | Host Rock Age | Host Rock Lithology | Mean Capacity | Mean Reservoir Temp |
---|---|---|---|---|---|---|
Amedee Geothermal Area | Walker-Lane Transition Zone | Extensional Tectonics | Mesozoic | granite; granodiorite | ||
Long Valley Caldera Geothermal Area | Walker-Lane Transition Zone | Extensional Tectonics | Quaternary | Bishop Tuff, Metamorphic Basement | 38 MW 38,000 kW 38,000,000 W 38,000,000,000 mW 0.038 GW 3.8e-5 TW | 513.15 K 240 °C 464 °F 923.67 °R |
North Brawley Geothermal Area | Gulf of California Rift Zone | Strike-Slip | Arkosic and quartz dominated sandstones | 50 MW 50,000 kW 50,000,000 W 50,000,000,000 mW 0.05 GW 5.0e-5 TW | 539.15 K 266 °C 510.8 °F 970.47 °R | |
Wendel Geothermal Area | Walker-Lane Transition Zone Geothermal Region | Extensional Tectonics | Mesozoic | Granite, Granodiorite | 3.8 MW 3,800 kW 3,800,000 W 3,800,000,000 mW 0.0038 GW 3.8e-6 TW | 413.15 K 140 °C 284 °F 743.67 °R |