CV-1b: Magmatic - Intrusive

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CV-1b: Magmatic - Intrusive

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CV-1b: Magmatic - Intrusive:
intrusive refers to igneous rock formation in which hot magma cools underneath the surface of the earth. Intrusive magmatic plays are characterized by intrusive volcanism.
Other definitions:Wikipedia Reegle


Geysers in the Taupo Volcanic Zone in New Zealand (reference: www.renewbl.com)

Intrusive magmatic plays are characterized by intrusive volcanism; thus no active volcanism above the surface exists. These deep rooted magma features cause faulting, allowing fluids and gases to rise to the surface creating hot springs, fumaroles, boiling mud pools and other geothermal manifestations. [1]

Famous magmatic geothermal plays associated with intrusive activity include the Taupo Volcanic Zone in New Zealand.


A cross section view of the Taupo Volcanic Zone in New Zealand (ref: Book: North New Zealand)






According to Moeck and Beardsmore, magmatic-intrusive geothermal plays typically have the following properties:[2]

  • Geologic Setting – Magmatic Arcs, Mid Oceanic Ridges, Hot Spots
  • Heat Source/Storage Properties of Reservoir – Active Volcanism, Shallow Magma Chamber
  • 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" button.

CSV
Geothermal
Resource
Area
Geothermal
Region
Control
Structure
Host
Rock
Age
Host
Rock
Lithology
Mean
Capacity
Mean
Reservoir
Temp
Long Valley Caldera Geothermal Area Walker-Lane Transition Zone Displacement Transfer Zone Quaternary Bishop Tuff, Metamorphic Basement 38 MW38,000 kW
38,000,000 W
38,000,000,000 mW
0.038 GW
3.8e-5 TW
513.15 K240 °C
464 °F
923.67 °R
Ohaaki Geothermal Area Taupo Volcanic Zone Fault Intersection Quaternary Volcaniclastic 122 MW122,000 kW
122,000,000 W
122,000,000,000 mW
0.122 GW
1.22e-4 TW
538.15 K265 °C
509 °F
968.67 °R



References

  1. 1.0 1.1 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