Displacement Transfer Zone

GEOTHERMAL ENERGY

Displacement Transfer Zone:

Displacement transfer zones facilitate the transfer of strain between normal and strike-slip faults. 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 strike-slip faults.

Other definitions:Wikipedia Reegle

Controlling Structures

List of controlling structures typically associated with geothermal systems:

• 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

• Pull-Apart in Strike-Slip Fault Zone
• Intrusion Margins and Associated Fractures
• Stratigraphic Boundaries
• Fissure Swarms
• Caldera Rim Margins
• Lithologically Controlled

Dilational fault intersection between oblique-slip normal faults.

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.

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.

Examples

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

Geothermal 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 MW38,000 kW <br />38,000,000 W <br />38,000,000,000 mW <br />0.038 GW <br />3.8e-5 TW <br />	513.15 K240 °C <br />464 °F <br />923.67 °R <br />
North Brawley Geothermal Area	Gulf of California Rift Zone	Strike-Slip		Arkosic and quartz dominated sandstones	50 MW50,000 kW <br />50,000,000 W <br />50,000,000,000 mW <br />0.05 GW <br />5.0e-5 TW <br />	539.15 K266 °C <br />510.8 °F <br />970.47 °R <br />
Wendel Geothermal Area	Walker-Lane Transition Zone Geothermal Region	Extensional Tectonics	Mesozoic	Granite, Granodiorite	3.8 MW3,800 kW <br />3,800,000 W <br />3,800,000,000 mW <br />0.0038 GW <br />3.8e-6 TW <br />	413.15 K140 °C <br />284 °F <br />743.67 °R <br />