Type C: Caldera Resource

From Open Energy Information


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Type C: Caldera Resource:
No definition has been provided for this term.


Caldera resources may be found in many tectonic settings but are defined by their caldera structures which control the flow of the fluids in the system.

Examples of caldera resources include those at Medicine Lake, Valles Caldera, Los Humeros, and Yellowstone.

According to Brophy, caldera resources typically have the following properties:

  • Topography – Ring fractures, often rugged, with gentle floor topography
  • Climate – Variable
  • Depth to resource – Moderate to shallow (<2500m)
  • Surface manifestations - Common
  • Permeability – Low fracture permeability – often think tuff units







Examples

Want to add an example to this list? Select a Geothermal Resource Area to edit its "Brophy Model" 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
Amatitlan Geothermal AreaCentral American Volcanic Arc Chain25 MW
25,000 kW
25,000,000 W
25,000,000,000 mW
0.025 GW
2.5e-5 TW
513.15 K
240 °C
464 °F
923.67 °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
La Primavera Geothermal AreaTransmexican Volcanic BeltTertiaryAndesite25 MW
25,000 kW
25,000,000 W
25,000,000,000 mW
0.025 GW
2.5e-5 TW
527.15 K
254 °C
489.2 °F
948.87 °R
Lahendong Geothermal AreaMinahasa Volcanic ZoneFault IntersectionMioceneAndesite80 MW
80,000 kW
80,000,000 W
80,000,000,000 mW
0.08 GW
8.0e-5 TW
578.15 K
305 °C
581 °F
1,040.67 °R
Lihir Geothermal AreaPapua New Guinea Geothermal RegionBasalt; Breccias; Tuffs56 MW
56,000 kW
56,000,000 W
56,000,000,000 mW
0.056 GW
5.6e-5 TW
548.15 K
275 °C
527 °F
986.67 °R
Long Valley Caldera Geothermal AreaWalker-Lane Transition ZoneDisplacement Transfer ZoneQuaternaryBishop Tuff, Metamorphic Basement38 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
Sumatra-Sibayak Geothermal AreaSunda Volcanic Arc - Great Sumatra Fault ZoneFault IntersectionTertiarySandstone; Limestone12 MW
12,000 kW
12,000,000 W
12,000,000,000 mW
0.012 GW
1.2e-5 TW
543.15 K
270 °C
518 °F
977.67 °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”
Zunil Geothermal AreaCentral American Volcanic Arc ChainGranite; Volcanics28 MW
28,000 kW
28,000,000 W
28,000,000,000 mW
0.028 GW
2.8e-5 TW
532.15 K
259 °C
498.2 °F
957.87 °R

References

  1. Colin F. Williams, Marshall J. Reed and Arlene F. Anderson. 2011. Updating the Classification of Geothermal Resources - Presentation. In: Thirty-Sixth Workshop on Geothermal Reservoir Engineering; 2011/02/02; Stanford, California. Stanford, California: Stanford University; p. 23