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Geyser's magma chamber, California: constraints from gravity data, density measurements, and well information

By:  and 
Edited by: Anon

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Abstract

A new crustal model based on isostatic residual gravity, geologic mapping, well information, and density measurements shows that the high-gradient parts of the residual gravity anomaly can be explained in terms of lithologic variations within the upper 7 km of the crust, consistent with the upper-crustal framework of the area. This conclusion does not rule out the presence of a magma chamber at lower crustal depths; the broad aspects of the gravity anomaly support the presence of low-density partial melting at 15 to 20 km depth, consistent with magnetotelluric soundings and other geophysical measurements.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Geyser's magma chamber, California: constraints from gravity data, density measurements, and well information
ISBN 0934412715
Volume 17
Year Published 1993
Language English
Publisher Publ by Geothermal Resources Council
Publisher location Davis, CA, United States
Larger Work Title Transactions - Geothermal Resources Council
First page 227
Last page 233
Conference Title Proceedings of the 1993 Annual Meeting on Utilities and Geothermal: An Emerging Partnership
Conference Location Burlingame, CA, USA
Conference Date 10 October 1993 through 13 October 1993
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