Experience with the EM-60 electromagnetic system for geothermal exploration in Nevada
Lawrence Berkeley Laboratory (LBL) conducted controlled-source electromagnetic (EM) surveys at three geothermal prospects in northern Nevada. Over 40 soundings were made in Panther Canyon (Grass Valley), near Winnemucca; Soda Lakes, near Fallon; and McCoy, west of Austin, to test and demonstrate the applicability of LBL's EM-60 system to geothermal exploration. The EM-60 is a frequency-domain system using three-component magnetic detection. Typically, +-65 A is applied to an 100-m-diameter four-turn horizontal loop, generating a dipole moment >10/sup 6/ MKS over the frequency range 10/sup -3/ to 10/sup -3/ Hz. With such a source loop, soundings were made, at transmitter-receiver separations of up to 4 km, providing a maximum depth of penetration of 4 km.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5350328
- Report Number(s):
- LBL-12618; ON: DE82016714
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
150301* -- Geothermal Exploration & Exploration Technology-- Geophysical Techniques & Surveys
ELECTRICAL SURVEYS
ELECTROMAGNETIC SURVEYS
EXPLORATION
FEDERAL REGION IX
GEOPHYSICAL SURVEYS
GEOTHERMAL EXPLORATION
GEOTHERMAL RESOURCES
Geothermal Legacy
MAPS
NEVADA
NORTH AMERICA
RESISTIVITY SURVEYS
RESOURCES
SURVEYS
TEMPERATURE GRADIENTS
USA