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| Title: |
Comparison of dipole-dipole resistivity and electromagnetic induction sounding over the Panther Canyon thermal anomaly, Grass Valley, Nevada |
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| Creator/Author: |
Wilt, M.
;
Beyer, J.H.
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Goldstein, N.E.
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| Publication Date: | None |
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| OSTI Identifier: | OSTI 5354008 |
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| Report Number(s): | LBL-10987; CONF-800920-7 |
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| DOE Contract Number: | W-7405-ENG-48 |
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| Document Type: | Conference |
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| Specific Type: | Technical Report |
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| Coverage: | |
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| Resource Relation: | Conference: Geothermal Resource Council annual meeting, Salt Lake City, UT, USA, 9 Sep 1980 |
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| Other Number(s): | |
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| Research Org: | California Univ., Berkeley (USA). Lawrence Berkeley Lab.; Woodward-Clyde Consultants, San Francisco, CA (USA) |
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| Sponsoring Org: | Not Available |
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| Subject: | 15 GEOTHERMAL ENERGY; NEVADA; ELECTROMAGNETIC SURVEYS; GEOTHERMAL EXPLORATION; RESISTIVITY SURVEYS; COMPARATIVE EVALUATIONS; GEOLOGY; HEAT FLOW; MAPPING; TWO-DIMENSIONAL CALCULATIONS; ELECTRICAL SURVEYS; EXPLORATION; GEOPHYSICAL SURVEYS; NORTH AMERICA; SURVEYS; USA; WESTERN REGION |
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| Keywords: | Geothermal Legacy |
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| Description/Abstract: | A comparison is made between the dipole-dipole resistivity method and electromagnetic sounding method based on surveys over a geothermal anomaly near Panther Canyon, Grass Valley, Nevada. Dipole-dipole data were taken in conjunction with large-scale geothermal studies in the area. Two orthogonal lines were measured over the heat flow anomaly and two-dimensional modeling was performed on the data. EM sounding data were taken with the Lawrence Berkeley Laboratory EM-60 system which is a large-moment, frequency-domain, horizontal-loop system. Relative to single 50-meter-radius transmitter coil, eight soundings were made with detectors at distances of 0.5 to 1.6 km from the loop. Interpreted results from the two surveys indicate substantial agreement in the depth to and thickness of a conductive zone that may be associated with the thermal anomaly. The dipole-dipole method is inherently better for resolving resistive basement beneath the conductive anomaly, and dc resistivity interpretation techniques are presently better to handle the complex two-dimensional geology. However, the EM method is far less labor intensive, requiring only one-third the field time for similar areal coverage. |
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| Publisher: | |
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| Country of Publication: | US |
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| Language: | English |
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| Size/Format: | Medium: ED; Size: Pages: 5 |
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| Rights: | |
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| Availability: | NTIS, PC A02/MF A01. |
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| System Entry Date: | 2009 Sep 24 |
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