CV-2a: Plutonic - Recent or Active Volcanism

GEOTHERMAL ENERGY

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

Moeck-Beardsmore Play Types

This classification scheme was developed by Moeck and Beardsmore, as reported in A New 'Geothermal Play Type' Catalog: Streamlining Exploration Decision Making.

• Convection-Dominated Geothermal Systems
  • Magmatic Geothermal Play Type
    • CV-1a: Extrusive
    • CV-1b: Intrusive
  • Plutonic Geothermal Play Type
    • CV-2a: Recent or Active Volcanism
    • CV-2b: Inactive Volcanism
  • CV-3: Extensional Domain
• Conduction-Dominated Geothermal Systems
  • CD-1: Intracratonic Basin
  • CD-2: Orogenic Belt
  • CD-3: Crystalline Rock - Basement

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:

• 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 Area	New Zealand Geothermal Region				82 MW82,000 kW <br />82,000,000 W <br />82,000,000,000 mW <br />0.082 GW <br />8.2e-5 TW <br />	553.15 K280 °C <br />536 °F <br />995.67 °R <br />
Travale-Radicondoli Geothermal Area	Italy Geothermal Region		Triassic	Dolostone; Metamorphic basement	200 MW200,000 kW <br />200,000,000 W <br />200,000,000,000 mW <br />0.2 GW <br />2.0e-4 TW <br />	543.15 K270 °C <br />518 °F <br />977.67 °R <br />
Valles Caldera - Redondo Geothermal Area	Rio Grande Rift	Fault Intersection Stratigraphic Boundaries Caldera Rim Margins	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	Fault Intersection Stratigraphic Boundaries Caldera Rim Margins	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”