Audio-Magnetotellurics At Coso Geothermal Area (1977)

GEOTHERMAL ENERGY

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Exploration Activity: Audio-Magnetotellurics At Coso Geothermal Area (1977)

Exploration Activity Details
Location	Coso Geothermal Area
Exploration Technique	Audio-Magnetotellurics
Activity Date	1977
Usefulness	not indicated
DOE-funding	Unknown

Exploration Basis

To investigate electrical properties of rocks associated with thermal phenomena of the Devil's Kitchen-Coso Hot Springs area

Notes

Audio-magnetotelluric geophysical surveys determined that the secondary low in the geothermal area, best defined by the 7.5-Hz AMT map and dc soundings, is caused by a shallow conductive zone (5--30 ohm m) interpreted to be hydrothermally altered Sierra Nevada basement rocks containing saline water of a hot water geothermal system. This zone of lowest apparent resistivities over the basement rocks lies within a closed contour of a heat flow anomaly where all values are greater than 10 heat flow units.

References

• Jackson, D.B. ODonnell, J.E.; Gregory, D. I.   (1 January 1977) Schlumberger soundings, audio-magnetotelluric soundings and telluric mapping in and around the Coso Range, California

• Jackson, D.B.; O'Donnell, J.E.   (10 May 1980) Reconnaissance electrical surveys in the Coso Range, California