Geothermal data-base study [electronic resource] : mine-water temperatures. Final report.
Geothermal Legacy.
Saved in:
| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Oak Ridge, Tenn. :
distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1978.
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| Subjects: |
| Summary: | Geothermal Legacy. |
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| Abstract: | Investigation of about 1,600 mines and prospects for perennial discharge resulted in the measurement of temperature, pH, specific conductance, and discharge at 80 sites to provide information for a geothermal data base. Measurements were made in the fall, winter, and late spring or early summer to provide information about seasonal variability. None of the temperatures measured exceeded the mean annual air temperature by 15°F, but three areas were noted where discharges were anomalously warm, based upon high temperatures, slight temperature variation, and quantity of discharge. The most promising area, at the Gold Bug mine in the Little Rockies, discharges water averaging 7.3°C (12.1°F) above the mean annual air temperature. The discharge may represent water heated during circulation within the syenite intrusive body. If the syenite is enriched in uranium and thorium, an abnormal amount of heat would be produced by radioactive decay. Alternatively, the water may move through deep permeable sedimentary strata, such as the Madison Group, and be discharged to the surface through fractures in the pluton. |
| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 07/01/1978. "rlo-2426-t2-3" Sonderegger, J.L.; Lawson, D.C. Montana Bureau of Mines and Geology, Butte (USA) |
| Physical Description: | Pages: 40 : digital, PDF file. |