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PRESENT STATE OF THE HYDROTHERMAL SYSTEM IN LONG VALLEY CALDERA, CALIFORNIA.

January 1, 1985

Results of test drilling to depths of 2 km and data on the chemical and isotopic content of waters from hot springs and fumaroles permit a conceptual model of the present-day hydrothermal system in Long Valley caldera to be delineated. The model consists of two principal zones in which hot water flows laterally from west to east at depths less than 1 km within and around the resurgent dome. Maximum measured temperatures within these zones are near 170 degree C, but estimates from chemical geothermometers and extrapolation of a high temperature gradient measured in a recent drill hole indicate that a source reservoir at temperatures near 240 degree C may exist at greater depths in the Bishop Tuff beneath the west moat.

Publication Year 1985
Title PRESENT STATE OF THE HYDROTHERMAL SYSTEM IN LONG VALLEY CALDERA, CALIFORNIA.
Authors Michael L. Sorey
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70013561
Record Source USGS Publications Warehouse