SHEAR WAVE SPLITTING AND FRACTURE PATTERNS AT THE GEYSERS (CALIFORNIA) GEOTHERMAL FIELD
- Key words
- Shear-wave splitting, The Geysers
- Location
- The Geysers, California
- Conference
- Stanford Geothermal Workshop
- Year
- 2001
- Session
- Geophysics
- Language
- English
Full text
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Abstract
Shear-wave splitting analyses from recorded mi-croearthquakes at The Geysers (California) indi-cate that subsurface predominant fractures in the field are oriented N10oE to N50oE under the NW Geysers seismic array and N40-50oE and N40-50oW under the SE Geysers array. These crack alignments seem consistent with a local structure characterized by a pull-apart block structure lim-ited by two right-lateral strike-slip faults oriented NW-SE and regionally controlled by the San Andreas fault.
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