Lassen Known Geothermal Resource Area, California: audio-magnetotelluric, telluric profiling, and self-potential studies
During the summer of 1979, geophysical work was done in the Lassen KGRA in northeastern California to assess the geothermal potential of the area. As part of the study, 68 audio-magnetotelluric (AMT) soundings were made and 2 telluric and self-potential (SP) profiles were done. The AMT station locations are shown. The scalar resistivities were contoured for 7.5 and 27 hertz data at north-south and east-west E-line orientations. The contour maps are complex, reflecting both lateral changes in geology and geothermal activity. The locations of the telluric and self-potential traverses are given. The profiles for traverse 1 show varied SP and telluric responses. The variations are probably geologically related with the drop in SP voltage and telluric resistivity on the east end of the traverse caused by a lateral lithology change. The profiles for traverse 2 show a sharp drop in SP voltage combined with a sharp increase in telluric resistivity near station 6. This could be associated with large-scale intrusive features (a ring dike) which trend to the northwest.
- Research Organization:
- Geological Survey, Washington, DC (USA)
- OSTI ID:
- 5426493
- Report Number(s):
- USGS-OFR-80-313; ON: DE82904219
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALIFORNIA
MAGNETOTELLURIC SURVEYS
SELF-POTENTIAL SURVEYS
TELLURIC SURVEYS
GEOLOGY
KGRA
LITHOLOGY
ORIENTATION
RESOURCE POTENTIAL
ELECTRICAL SURVEYS
ELECTROMAGNETIC SURVEYS
FEDERAL REGION IX
GEOPHYSICAL SURVEYS
NORTH AMERICA
SURVEYS
USA
Geothermal Legacy
150301* - Geothermal Exploration & Exploration Technology- Geophysical Techniques & Surveys