Lassen Known Geothermal Resource Area, California: audio-magnetotelluric, telluric profiling, and self-potential studies

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Description

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 ... continued below

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Pages: 28

Creation Information

Christopherson, K.R.; Hoover, D.B.; Lewis, V.; Radtke, B. & Senterfit, R.M. January 1, 1980.

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Description

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.

Physical Description

Pages: 28

Notes

Department of Interior, Washington, DC.

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  • Other Information: Portions of document are illegible

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  • Other: DE82904219
  • Report No.: USGS-OFR-80-313
  • Grant Number: None
  • DOI: 10.2172/5426493 | External Link
  • Office of Scientific & Technical Information Report Number: 5426493
  • Archival Resource Key: ark:/67531/metadc1067610

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • January 1, 1980

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 27, 2018, 6:46 p.m.

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Christopherson, K.R.; Hoover, D.B.; Lewis, V.; Radtke, B. & Senterfit, R.M. Lassen Known Geothermal Resource Area, California: audio-magnetotelluric, telluric profiling, and self-potential studies, report, January 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1067610/: accessed December 9, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.