- 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 classified accommodation zones as a one of two major subsets of fault intersection types that act as structural controls on geothermal systems 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.
Accommodation zones between overlapping, oppositely dipping normal fault systems account for 8% of all Basin & Range structures hosting geothermal systems. Multiple fault intersections in the subsurface in these zones enhances permeability and hydrothermal fluid flow. According to Faulds et al. (2011):
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.CSV
|Brady Hot Springs Geothermal Area||Northwest Basin and Range Geothermal Region||Extensional Tectonics||Mesozoic||metamorphic rocks||26.1 MW|
|Stillwater Geothermal Area||Northwest Basin and Range Geothermal Region||Extensional Tectonics||Quaternary||sandstone||47.2 MW|