Steady state deformation of the Coso Range, east central California, inferred from satellite radar interferometry
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Abstract
Observations of deformation from 1992 to 1997 in the southern Coso Range using satellite radar interferometry show deformation rates of up to 35 mm yr−1 in an area ∼10 km by 15 km. The deformation is most likely the result of subsidence in an area around the Coso geothermal field. The deformation signal has a short-wavelength component, related to production in the field, and a long-wavelength component, deforming at a constant rate, that may represent a source of deformation deeper than the geothermal reservoir. We have modeled the long-wavelength component of deformation and inferred a deformation source at ∼4 km depth. The source depth is near the brittle-ductile transition depth (inferred from seismicity) and ∼1.5 km above the top of the rhyolite magma body that was a source for the most recent volcanic eruption in the Coso volcanic field [Manley and Bacon, 2000]. From this evidence and results of other studies in the Coso Range, we interpret the source to be a leaking deep reservoir of magmatic fluids derived from a crystallizing rhyolite magma body.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Steady state deformation of the Coso Range, east central California, inferred from satellite radar interferometry |
| Series title | Journal of Geophysical Research B: Solid Earth |
| DOI | 10.1029/2001JB000298 |
| Volume | 106 |
| Issue | B7 |
| Year Published | 2001 |
| Language | English |
| Publisher | American Geophysical Union |
| Description | 12 p. |
| First page | 13769 |
| Last page | 13780 |
| Country | United States |
| State | California |
| Other Geospatial | Coso Range |
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