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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 |
| Google Analytic Metrics | Metrics page |