Title:

SHEAR WAVE SPLITTING AND FRACTURE PATTERNS AT THE GEYSERS (CALIFORNIA) GEOTHERMAL FIELD

Authors:

D. Erten, M. Elkibbi and J.A. Rial

Key Words:

Shear-wave splitting, The Geysers

Geo Location:

The Geysers, California

Conference:

Stanford Geothermal Workshop

Year:

2001

Session:

Geophysics

Language:

English

File Size:

684KB

View File:

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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