CV-2a: Plutonic - Recent or Active Volcanism

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CV-2a: Plutonic - Recent or Active Volcanism:
A plutonic geothermal play type with recent or active volcanism is where geothermal heat is provided by cooling crystalline rock. Faulting and the recharge of meteoric water will allow the heat to laterally expand.
Other definitions:Wikipedia Reegle


Larderello's dry steam geothermal field was the first geothermal resource to be utilized for electricity generation in 1911 (reference: reuk.co.uk)


Famous plutonic geothermal plays associated with recent/active volcanism include the dry steam resource in Larderello in Italy, the first geothermal field ever exploited for electricity in 1911.

According to Moeck and Beardsmore, plutonic geothermal plays with active volcanism typically have the following properties:[2]

  • Geologic Setting – Convergent Margins with Recent Plutonism (< 3 Ma), Young Orogens, Post-orogenic Phase
  • Heat Source/Storage Properties of Reservoir – Young Intrusion+Extension, Felsic Pluton
  • Dominant Heat Transport Mechanism – Magmatic-hydrothermal Circulation, Fault Controlled







Examples

Want to add an example to this list? Select a Geothermal Resource Area to edit its "Moeck-Beardsmore Play Type" 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
Ngatamariki Geothermal AreaNew Zealand Geothermal Region82 MW
82,000 kW
82,000,000 W
82,000,000,000 mW
0.082 GW
8.2e-5 TW
553.15 K
280 °C
536 °F
995.67 °R
Travale-Radicondoli Geothermal AreaItaly Geothermal RegionTriassicDolostone; Metamorphic basement200 MW
200,000 kW
200,000,000 W
200,000,000,000 mW
0.2 GW
2.0e-4 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”



References

  1. Inga S. Moeck,Graeme Beardsmore. 2014. A New 'Geothermal Play Type' Catalog: Streamlining Exploration Decision Making. In: Proceedings. Thirty-Ninth Workshop on Geothermal Reservoir Engineering; 2014/02/24; Stanford, California. Stanford, California: Stanford University; p. 8
  2. Inga Moeck. 2013. Geothermal Plays in Geologic Settings. In: IGA Workshop on Developing Best Practice for Geothermal Exploration and Resource/Reserve Classification; 2013/11/14; Essen, Germany. IGA website: International Geothermal Association; p. 19