Geology and Hydrothermal Alteration of the Hverahlid HT-System, SW-Iceland
- Key words
- Hengill, Hverahlid, geothermal system, geology, hydrothermal alteration, geothermal model
- Location
- Hverahlid, Iceland
- Conference
- World Geothermal Congress
- Year
- 2010
- Session
- 12. Geology
- Language
- English
- Paper number
- 1234
Full text
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Abstract
The Hverahlid high-temperature system is located in the southern sector of the Hengill central volcano in SW-Iceland. Reykjavik Energy has today drilled three exploration wells into the geothermal reservoir in order to study its potential for electrical production. The 2000-2800 m deep wells that show a high-temperature system of 200°C -320°C below 600 m-1000 m depth. Lava successions dominate the strata with less hyaloclastite formations. Hydrothermal alteration ranges from totally fresh rocks in the overlying cold groundwater system through zeolite assemblage and into high-temperature mineral assemblage including chlorite, epidote, wollastonite and actinolite.
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