Rift Zone

From Open Energy Information


Dictionary.png
Rift Zone:
A divergent plate boundary within a continent
Other definitions:Wikipedia Reegle


Tectonic Settings

List of tectonic settings known to host modern geothermal systems:
The Rio Grande Rift exemplifies rift zone tectonics - increased volcanic activity and the formation of graben structures (reference: science-art.com)

Rift valleys occur at divergent plate boundaries, resulting in large graben structures and increased volcanism. The East African Rift is an example of a continental rift zone with increased volcanism, while the Atlantic’s spreading Mid-Ocean Ridge is host to an enormous amount of geothermal activity in Iceland.

Some rift zones, like that of the Gulf of California, exhibit transtensional strains exemplified by strike-slip regions like that of the San Andreas fault. Rift zones may also give way to leaky transform faults that may contribute to increased volcanism as is thought to be the case with Las Tres Virgenes in Baja California, Mexico and the Azores Islands which are located on a triple junction.

Examples

Want to add an example to this list? Select a Geothermal Resource Area to edit its "Tectonic Setting" property using the "Edit with Form" option.

CSV
Geothermal
Resource
Area
Geothermal
Region
Control
Structure
Host
Rock
Age
Host
Rock
Lithology
Mean
Capacity
Mean
Reservoir
Temp
Aluto-Langano Geothermal AreaEast African Rift System - Ethiopian Rift ValleyMajor Normal FaultBasalt7.5 MW
7,500 kW
7,500,000 W
7,500,000,000 mW
0.0075 GW
7.5e-6 TW
561.15 K
288 °C
550.4 °F
1,010.07 °R
Bjarnaflag Geothermal AreaMid Atlantic RidgeBasalt3 MW
3,000 kW
3,000,000 W
3,000,000,000 mW
0.003 GW
3.0e-6 TW
573.15 K
300 °C
572 °F
1,031.67 °R
Bruchsal Geothermal AreaUpper Rhine ValleyMajor Normal FaultTriassicSandstone0.6 MW
600 kW
600,000 W
600,000,000 mW
6.0e-4 GW
6.0e-7 TW
413.15 K
140 °C
284 °F
743.67 °R
Cerro Prieto Geothermal AreaGulf of California Rift Zone Geothermal RegionSandstone720 MW
720,000 kW
720,000,000 W
720,000,000,000 mW
0.72 GW
7.2e-4 TW
588.15 K
315 °C
599 °F
1,058.67 °R
East Mesa Geothermal AreaGulf of California Rift Zonesandstone115 MW
115,000 kW
115,000,000 W
115,000,000,000 mW
0.115 GW
1.15e-4 TW
443.15 K
170 °C
338 °F
797.67 °R
Eburru Geothermal AreaEast African Rift System - Kenya RiftBasalt2.5 MW
2,500 kW
2,500,000 W
2,500,000,000 mW
0.0025 GW
2.5e-6 TW
578.15 K
305 °C
581 °F
1,040.67 °R
Fenton Hill HDR Geothermal AreaRio Grande RiftLithologically ControlledPrecambrianCrystalline basement “pCu” (undifferentiated in map units); Biotite Granodiorite (Phase I Reservoir); Gneiss, Schist, Granodiorite, Granite, Metavolcanic Rocks (Phase II Reservoir)20 MW
20,000 kW
20,000,000 W
20,000,000,000 mW
0.02 GW
2.0e-5 TW
508.15 K
235 °C
455 °F
914.67 °R
Heber Geothermal AreaGulf of California Rift ZonePull-Apart in Strike-Slip Fault Zonesandstone180 MW
180,000 kW
180,000,000 W
180,000,000,000 mW
0.18 GW
1.8e-4 TW
447.15 K
174 °C
345.2 °F
804.87 °R
Hellisheidi Geothermal AreaSouth Iceland Seismic Zone - Mid Atlantic RidgeBasalt303 MW
303,000 kW
303,000,000 W
303,000,000,000 mW
0.303 GW
3.03e-4 TW
533.15 K
260 °C
500 °F
959.67 °R
Husavik (Hveravellir) Geothermal AreaMid Atlantic RidgeBasalt2 MW
2,000 kW
2,000,000 W
2,000,000,000 mW
0.002 GW
2.0e-6 TW
395.15 K
122 °C
251.6 °F
711.27 °R
Krafla Geothermal AreaMid Atlantic RidgeBasalt60 MW
60,000 kW
60,000,000 W
60,000,000,000 mW
0.06 GW
6.0e-5 TW
538.15 K
265 °C
509 °F
968.67 °R
Landau Geothermal AreaUpper Rhine ValleyMajor Normal Fault3.6 MW
3,600 kW
3,600,000 W
3,600,000,000 mW
0.0036 GW
3.6e-6 TW
413.15 K
140 °C
284 °F
743.67 °R
Las Tres Virgenes Geothermal AreaBaja Peninsula Geothermal RegionGranodiorite10 MW
10,000 kW
10,000,000 W
10,000,000,000 mW
0.01 GW
1.0e-5 TW
553.15 K
280 °C
536 °F
995.67 °R
Nesjavellir Geothermal AreaSouth Iceland Seismic Zone - Mid Atlantic RidgeBasalt120 MW
120,000 kW
120,000,000 W
120,000,000,000 mW
0.12 GW
1.2e-4 TW
568.15 K
295 °C
563 °F
1,022.67 °R
Olkaria Geothermal AreaEast African Rift System - Kenya Rift602 MW
602,000 kW
602,000,000 W
602,000,000,000 mW
0.602 GW
6.02e-4 TW
548.15 K
275 °C
527 °F
986.67 °R
Pico Vermelho-Ribeira Grande Geothermal AreaMid Atlantic RidgeBasalt28.5 MW
28,500 kW
28,500,000 W
28,500,000,000 mW
0.0285 GW
2.85e-5 TW
511.15 K
238 °C
460.4 °F
920.07 °R
Reykjanes Geothermal AreaMid Atlantic RidgeBasalt100 MW
100,000 kW
100,000,000 W
100,000,000,000 mW
0.1 GW
1.0e-4 TW
583.15 K
310 °C
590 °F
1,049.67 °R
Salton Sea Geothermal AreaGulf of California Rift ZonePull-Apart in Strike-Slip Fault ZonePleistocenesandstone437 MW
437,000 kW
437,000,000 W
437,000,000,000 mW
0.437 GW
4.37e-4 TW
575.15 K
302 °C
575.6 °F
1,035.27 °R
Svartsengi Geothermal AreaMid Atlantic RidgeFault IntersectionBasalt76 MW
76,000 kW
76,000,000 W
76,000,000,000 mW
0.076 GW
7.6e-5 TW
513.15 K
240 °C
464 °F
923.67 °R
Valles Caldera - Redondo Geothermal AreaRio Grande RiftCaldera Rim Margins
Fault Intersection
Stratigraphic Boundaries
Mississippian-Pennsylvanian; Pleistocene, 1.6 to 1.25 MaLimestone-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 AreaRio Grande RiftCaldera Rim Margins
Fault Intersection
Stratigraphic Boundaries
Precambrian; Mississippian-Pennsylvanian; Pleistocene, 1.6 to 1.25 Ma; Pliocene; MioceneCrystalline 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”