Fault Intersection
Controlling Structures

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]
Examples
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Geothermal Resource Area | Geothermal Region | Tectonic Setting | Host Rock Age | Host Rock Lithology | Mean Capacity | Mean Reservoir Temp |
---|---|---|---|---|---|---|
Bac-Man Laguna Geothermal Area | Philippine Island Arc | Subduction Zone | Volcanic | 150 MW150,000 kW <br />150,000,000 W <br />150,000,000,000 mW <br />0.15 GW <br />1.5e-4 TW <br /> | 543.15 K270 °C <br />518 °F <br />977.67 °R <br /> | |
Blue Mountain Geothermal Area | Northwest Basin and Range Geothermal Region | Extensional Tectonics | Triassic | Metasedimentary | 49.5 MW49,500 kW <br />49,500,000 W <br />49,500,000,000 mW <br />0.0495 GW <br />4.95e-5 TW <br /> | 470.15 K197 °C <br />386.6 °F <br />846.27 °R <br /> |
Bouillante Geothermal Area | Lesser Antilles Volcanic Arc | Subduction Zone | Chlorite | 15 MW15,000 kW <br />15,000,000 W <br />15,000,000,000 mW <br />0.015 GW <br />1.5e-5 TW <br /> | 528.15 K255 °C <br />491 °F <br />950.67 °R <br /> | |
Chena Geothermal Area | Alaska Geothermal Region | Non-Tectonic | 90 Ma | Granitic Pluton | 0.4 MW400 kW <br />400,000 W <br />400,000,000 mW <br />4.0e-4 GW <br />4.0e-7 TW <br /> | 371.15 K98 °C <br />208.4 °F <br />668.07 °R <br /> |
Germencik Geothermal Area | Aegean-West Anatolian Extensional Region | Extensional Tectonics | Marble | 73.4 MW73,400 kW <br />73,400,000 W <br />73,400,000,000 mW <br />0.0734 GW <br />7.34e-5 TW <br /> | 491.15 K218 °C <br />424.4 °F <br />884.07 °R <br /> | |
Gumuskoy Geothermal Area | Aegean-West Anatolian Extensional Region | Strike-Slip Extensional Tectonics | Paleozic | Marble | 13.2 MW13,200 kW <br />13,200,000 W <br />13,200,000,000 mW <br />0.0132 GW <br />1.32e-5 TW <br /> | 413.15 K140 °C <br />284 °F <br />743.67 °R <br /> |
Kagoshima Geothermal Area | Ryuku Arc | Subduction Zone | Neogene to recent | Volcanic Rocks, Andesite | 0.1 MW100 kW <br />100,000 W <br />100,000,000 mW <br />1.0e-4 GW <br />1.0e-7 TW <br /> | 512.15 K239 °C <br />462.2 °F <br />921.87 °R <br /> |
Kawerau Geothermal Area | Taupo Volcanic Zone | Extensional Tectonics Subduction Zone | Quaternary | Volcaniclastic; Sandstone; Mudstone | 115 MW115,000 kW <br />115,000,000 W <br />115,000,000,000 mW <br />0.115 GW <br />1.15e-4 TW <br /> | 543.15 K270 °C <br />518 °F <br />977.67 °R <br /> |
Kizildere Geothermal Area | Aegean-West Anatolian Extensional Region | Extensional Tectonics | Miocene | Limestone | 102 MW102,000 kW <br />102,000,000 W <br />102,000,000,000 mW <br />0.102 GW <br />1.02e-4 TW <br /> | 459.15 K186 °C <br />366.8 °F <br />826.47 °R <br /> |
Lahendong Geothermal Area | Minahasa Volcanic Zone | Subduction Zone | Miocene | Andesite | 80 MW80,000 kW <br />80,000,000 W <br />80,000,000,000 mW <br />0.08 GW <br />8.0e-5 TW <br /> | 578.15 K305 °C <br />581 °F <br />1,040.67 °R <br /> |
Lightning Dock Geothermal Area | Southern Basin and Range Geothermal Region | Extensional Tectonics | Paleozoic carbonate rocks and late Tertiary volcanic rocks | 4.4 MW4,400 kW <br />4,400,000 W <br />4,400,000,000 mW <br />0.0044 GW <br />4.4e-6 TW <br /> | 443.15 K170 °C <br />338 °F <br />797.67 °R <br /> | |
Mokai Geothermal Area | Taupo Volcanic Zone | Extensional Tectonics Subduction Zone | Quaternary | Volcaniclastic | 112 MW112,000 kW <br />112,000,000 W <br />112,000,000,000 mW <br />0.112 GW <br />1.12e-4 TW <br /> | 568.15 K295 °C <br />563 °F <br />1,022.67 °R <br /> |
Mutnovskaya Geothermal Area | Kuril-Kamchatka Arc | Subduction Zone | Oligocene | 62 MW62,000 kW <br />62,000,000 W <br />62,000,000,000 mW <br />0.062 GW <br />6.2e-5 TW <br /> | 507.15 K234 °C <br />453.2 °F <br />912.87 °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 /> | |
Ohaaki Geothermal Area | Taupo Volcanic Zone | Extensional Tectonics Subduction Zone | Quaternary | Volcaniclastic | 122 MW122,000 kW <br />122,000,000 W <br />122,000,000,000 mW <br />0.122 GW <br />1.22e-4 TW <br /> | 538.15 K265 °C <br />509 °F <br />968.67 °R <br /> |
Raft River Geothermal Area | Northern Basin and Range Geothermal Region | Extensional Tectonics | 1- Archean; 2-Proterozoic | 1- quartz monzonite; 2-schist; quartzite | 13 MW13,000 kW <br />13,000,000 W <br />13,000,000,000 mW <br />0.013 GW <br />1.3e-5 TW <br /> | 468.15 K195 °C <br />383 °F <br />842.67 °R <br /> |
Rotokawa Geothermal Area | Taupo Volcanic Zone | Extensional Tectonics Subduction Zone | Quaternary | Volcaniclastic | 167 MW167,000 kW <br />167,000,000 W <br />167,000,000,000 mW <br />0.167 GW <br />1.67e-4 TW <br /> | 573.15 K300 °C <br />572 °F <br />1,031.67 °R <br /> |
Steamboat Springs Geothermal Area | Walker-Lane Transition Zone | Extensional Tectonics | 1- Cretaceous; 2- Pliocene-Pleistocene | 1- granodiorite; 2- basaltic andesite | 147 MW147,000 kW <br />147,000,000 W <br />147,000,000,000 mW <br />0.147 GW <br />1.47e-4 TW <br /> | 483.15 K210 °C <br />410 °F <br />869.67 °R <br /> |
Sumatra-Sibayak Geothermal Area | Sunda Volcanic Arc - Great Sumatra Fault Zone | Subduction Zone | Tertiary | Sandstone; Limestone | 12 MW12,000 kW <br />12,000,000 W <br />12,000,000,000 mW <br />0.012 GW <br />1.2e-5 TW <br /> | 543.15 K270 °C <br />518 °F <br />977.67 °R <br /> |
Svartsengi Geothermal Area | Mid Atlantic Ridge | Rift Zone | Basalt | 76 MW76,000 kW <br />76,000,000 W <br />76,000,000,000 mW <br />0.076 GW <br />7.6e-5 TW <br /> | 513.15 K240 °C <br />464 °F <br />923.67 °R <br /> | |
Tuzla Geothermal Area | Aegean-West Anatolian Extensional Region | Extensional Tectonics | 8 MW8,000 kW <br />8,000,000 W <br />8,000,000,000 mW <br />0.008 GW <br />8.0e-6 TW <br /> | 405.15 K132 °C <br />269.6 °F <br />729.27 °R <br /> | ||
Valles Caldera - Redondo Geothermal Area | Rio Grande Rift | Rift Zone Extensional Tectonics | Mississippian-Pennsylvanian; Pleistocene, 1.6 to 1.25 Ma | Limestone-Madera Formation “MIPu”; Rhyolitic tuff-Intracaldera Bandelier Tuff (upper Tshirege “Qbt” and lower Otowi “Qbo” members); Caldera Fill Rhyolite (shallow) | ||
Valles Caldera - Sulphur Springs Geothermal Area | Rio Grande Rift | Rift Zone Extensional Tectonics | Precambrian; Mississippian-Pennsylvanian; Pleistocene, 1.6 to 1.25 Ma; Pliocene; Miocene | Crystalline basement “pCu”; Limestone-Madera Formation “MIPu”; Rhyolitic tuff-Bandelier Tuff (upper Tshirege “Qbt” and lower Otowi “Qbo” members); Caldera Fill Rhyolite (shallow); Dacitic/Andesitic to Rhyolitic lavas and tuffs-Keres Group Volcanics (shallow); Santa Fe Group volcaniclastics “Tsf” | ||
Wairakei-Poihipi Geothermal Area | Taupo Volcanic Zone | Extensional Tectonics Subduction Zone | Quaternary | Volcaniclastic | 352 MW352,000 kW <br />352,000,000 W <br />352,000,000,000 mW <br />0.352 GW <br />3.52e-4 TW <br /> | 483.15 K210 °C <br />410 °F <br />869.67 °R <br /> |
Yangbajain Geothermal Area | Himalayan Mountain Range | 24 MW24,000 kW <br />24,000,000 W <br />24,000,000,000 mW <br />0.024 GW <br />2.4e-5 TW <br /> | 478.15 K205 °C <br />401 °F <br />860.67 °R <br /> |
References
- ↑ James E. Faulds,Nicholas H. Hinz,Mark F. Coolbaugh,Patricia H. Cashman,Christopher Kratt,Gregory Dering,Joel Edwards,Brett Mayhew,Holly McLachlan. 2011. Assessment of Favorable Structural Settings of Geothermal Systems in the Great Basin, Western USA. In: Transactions. GRC Anual Meeting; 2011/10/23; San Diego, CA. Davis, CA: Geothermal Resources Council; p. 777–783