Acid Alteration at the Surface of the Otake Geothermal Field, Kyushu, Japan
- Location
- Otake-Hatchobaru, Japan
- Conference
- New Zealand Geothermal Workshop
- Year
- 2006
- Session
- Geology and Alteration
- Language
- English
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Abstract
The alunite zone which is located at the surface and shallow depths in the production area of the Otake geothermal filed is composed mainly alunite and cristobalite. Quartz with alunite occurs only a limited area near O-9 which is the only well used since the opening of the Otake power plant in 1967. The delta 34S of alunite is generally high, indicating hypogene origin of alunite.
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