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Electromagnetic constraints on strike-slip fault geometry—The Fraser River fault system

1992; Geological Society of America; Volume: 20; Issue: 6 Linguagem: Inglês

10.1130/0091-7613(1992)020 2.3.co;2

1943-2682

Alan G. Jones, R. D. Kurtz, David E. Boerner, James A. Craven, Gary McNeice, D. I. Gough, Jon M. DeLaurier, Rob G. Ellis,

Geophysical and Geoelectrical Methods

Research Article| June 01, 1992 Electromagnetic constraints on strike-slip fault geometry—The Fraser River fault system Alan G. Jones; Alan G. Jones 1Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar Ron D. Kurtz; Ron D. Kurtz 1Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar David E. Boerner; David E. Boerner 1Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar James A. Craven; James A. Craven 1Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar Gary W. McNeice; Gary W. McNeice 1Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar D. Ian Gough; D. Ian Gough 2Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada Search for other works by this author on: GSW Google Scholar Jon M. DeLaurier; Jon M. DeLaurier 3Geological Survey of Canada, Pacific Geoscience Centre, Sidney, British Columbia V8L 4B2, Canada Search for other works by this author on: GSW Google Scholar Rob G. Ellis Rob G. Ellis 4Department of Geophysics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Geology (1992) 20 (6): 561–564. https://doi.org/10.1130/0091-7613(1992)020 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Alan G. Jones, Ron D. Kurtz, David E. Boerner, James A. Craven, Gary W. McNeice, D. Ian Gough, Jon M. DeLaurier, Rob G. Ellis; Electromagnetic constraints on strike-slip fault geometry—The Fraser River fault system. Geology 1992;; 20 (6): 561–564. doi: https://doi.org/10.1130/0091-7613(1992)020 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Magnetotelluric data from four profiles crossing the Eocene strike-slip Fraser River fault in southwestern British Columbia suggest that it penetrates the entire crust. This conclusion is supported by seismic reflection observations of a 2-3 km step in the Moho slightly to the east of the surface expression of the fault, but is at variance with an interpretation of the seismic data in which the fault soles into mid-crustal reflectors that seem to be continuous across the fault trace. A crustal-penetrating geometry supports the proposal that the Fraser River fault forms part of a 2500-km-long intracontinental transform fault system in northwestern North America. Modeling studies resolve a thin, highly conducting mid-crustal zone that is connected electrically to the conducting lower crust beneath the Coast belt. Low δ13C values close to the Fraser fault system suggest that the electromagnetic signature of this zone may be due to the presence of organic carbon. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.