Intrusion Margins and Associated Fractures
Intrusion Margins and Associated Fractures
Controlling Structures

Hydrothermal circulation often occurs at the lithologic boundaries of igneous intrusions and along the fractures they induce in the country rock.
Examples
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Geothermal Resource Area | Geothermal Region | Tectonic Setting | Host Rock Age | Host Rock Lithology | Mean Capacity | Mean Reservoir Temp |
---|---|---|---|---|---|---|
Blue Mountain Geothermal Area | Northwest Basin and Range Geothermal Region | Extensional Tectonics | Triassic | Metasedimentary | 49.5 MW49,500 kW <br />49,500,000 W <br />49,500,000,000 mW <br />0.0495 GW <br />4.95e-5 TW <br /> | 470.15 K197 °C <br />386.6 °F <br />846.27 °R <br /> |
Chena Geothermal Area | Alaska Geothermal Region | Non-Tectonic | 90 Ma | Granitic Pluton | 0.4 MW400 kW <br />400,000 W <br />400,000,000 mW <br />4.0e-4 GW <br />4.0e-7 TW <br /> | 371.15 K98 °C <br />208.4 °F <br />668.07 °R <br /> |
Kilauea East Rift Geothermal Area | Hawaii Geothermal Region | Hot Spot | Quaternary | Tholeiitic Basalt | 47 MW47,000 kW <br />47,000,000 W <br />47,000,000,000 mW <br />0.047 GW <br />4.7e-5 TW <br /> | 575.15 K302 °C <br />575.6 °F <br />1,035.27 °R <br /> |
Waunita Hot Springs Geothermal Area | Rio Grande Rift |