CV-1b: Magmatic - Intrusive
From Open Energy Information
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.
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.[1]
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" option.
CSVGeothermal 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 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 |
Ohaaki Geothermal Area | Taupo Volcanic Zone | Fault Intersection | Quaternary | Volcaniclastic | 122 MW 122,000 kW 122,000,000 W 122,000,000,000 mW 0.122 GW 1.22e-4 TW | 538.15 K 265 °C 509 °F 968.67 °R |
References
- ↑ 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
- ↑ 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