Low-altitude aeromagnetic survey of a portion of the Coso Hot Springs KGRA, Inyo County, California

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Report: Low-altitude aeromagnetic survey of a portion of the Coso Hot Springs KGRA, Inyo County, California

Abstract
A detailed low-altitude aeromagnetic survey of 576 line-mi (927 line-km) was completed over a portion of the Coso Hot Springs KGRA in September 1977. The survey has defined a pronounced magnetic low that could help delineate the geothermal system. The magnetic low has an areal extent of approximately 10 sq mi (26 sq km). Direct and indirect evidence indicates that this anomaly is due, in part, to magnetite destruction by hydrothermal solutions associated with the geothermal system. The anomaly generally coincides with two other geophysical anomalies which are directly associated with the system: 1) a bedrock electrical resistivity low and 2) an area of relatively high near-surface temperatures. The highest measured heat flow, 18 HFU, also occurs within its boundary. The magnetic low occurs at the intersection of two major structural zones which coincide with a complementary set of strike-slip fault zones determined from seismic activity. The intersection of these two zones of active tectonism probably served as the locus for emplacement of a pluton at depth, above which are observed the coincidental geophysical anomalies and surface manifestations related to the geothermal system.

Authors 
Fox and R. C.  








Published 
DOE Information Bridge, 5/1/1978





DOI 
10.2172/6548832


 

Citation

Fox, R. C.  . 5/1/1978. Low-altitude aeromagnetic survey of a portion of the Coso Hot Springs KGRA, Inyo County, California. (!) : DOE Information Bridge.


Related Geothermal Exploration Activities
Activities (1)


Areas (1)
  1. Coso Geothermal Area
Regions (0)