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Application of heat-flow techniques to geothermal energy exploration, Leach Hot Springs area, Grass Valley, Nevada [electronic resource].

Published
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1977.
Physical Description
Pages: 132 : digital, PDF file
Additional Creators
University of California, Berkeley and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A total of 82 holes ranging in depth from 18 to 400 meters were drilled for thermal and hydrologic studies in a 200 km/sup 2/ area of Grass Valley, Nevada, near Leach Hot Springs. Outside the immediate area of Leach Hot Springs, heat flow ranges from 1 to 6.5 hfu with a mean of 2.4 hfu (1 hfu = 10/sup -6/ cal cm/sup 2/ s/sup -1/ = 41.8 mWm/sup -2/). Within 2 km of the springs, conductive heat flow ranges between 1.6 and more than 70 hfu averaging 13.6 hfu. Besides the conspicuous thermal anomaly associated with the hot springs, two additional anomalies were identified. One is associated with faults bounding the western margin of the Tobin Range near Panther Canyon, and the other is near the middle of Grass Valley about 5 km SSW of Leach Hot Springs. The mid-valley anomaly appears to be caused by hydrothermal circulation in a bedrock horst beneath about 375 meters of impermeable valley sediments. If the convective and conductive heat discharge within 2 km of the Leach Hot Springs is averaged over the entire hydrologic system (including areas of recharge), the combined heat flux from this part of Grass Valley is about 3 hfu, consistent with the average regional conductive heat flow in the Battle Mountain High. The hydrothermal system can be interpreted as being in a stationary stable phase sustained by high regional heat flow, and no localized crustal heat sources (other than hydrothermal convection to depths of a few kilometers) need be invoked to explain the existence of Leach Hot Springs.
Report Numbers
E 1.99:usgs-ofr-77-762
E 1.99: lbl-6809
lbl-6809
usgs-ofr-77-762
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Note
Published through SciTech Connect.
01/01/1977.
"usgs-ofr-77-762"
" lbl-6809"
Lachenbruch, A.H.; Wollenberg, H.A.; Sass, J.H.; Munroe, R.J.; Ziagos, J.P.; di Somma, D.E.
Geological Survey, Washington, DC (USA)
View MARC record | catkey: 14387571