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Electric lithosphere of the Slave craton

2001; Geological Society of America; Volume: 29; Issue: 5 Linguagem: Inglês

10.1130/0091-7613(2001)029 2.0.co;2

1943-2682

Alan G. Jones, Ian J. Ferguson, Alan D. Chave, R. L. Evans, Gary McNeice,

Earthquake Detection and Analysis

Research Article| May 01, 2001 Electric lithosphere of the Slave craton Alan G. Jones; Alan G. Jones 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar Ian J. Ferguson; Ian J. Ferguson 2Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada Search for other works by this author on: GSW Google Scholar Alan D. Chave; Alan D. Chave 3Deep Submergence Laboratory, Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Rob L. Evans; Rob L. Evans 4Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Gary W. McNeice Gary W. McNeice 5Phoenix Geophysics Ltd., 3781 Victoria Park Avenue, Scarborough, Ontario M1W 3K5, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Alan G. Jones 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Ian J. Ferguson 2Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada Alan D. Chave 3Deep Submergence Laboratory, Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Rob L. Evans 4Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Gary W. McNeice 5Phoenix Geophysics Ltd., 3781 Victoria Park Avenue, Scarborough, Ontario M1W 3K5, Canada Publisher: Geological Society of America Received: 15 Sep 2000 Revision Received: 24 Jan 2001 Accepted: 26 Jan 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (5): 423–426. https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Article history Received: 15 Sep 2000 Revision Received: 24 Jan 2001 Accepted: 26 Jan 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Alan G. Jones, Ian J. Ferguson, Alan D. Chave, Rob L. Evans, Gary W. McNeice; Electric lithosphere of the Slave craton. Geology 2001;; 29 (5): 423–426. doi: https://doi.org/10.1130/0091-7613(2001)029 2.0.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 The Archean Slave craton in northwestern Canada is an ideal natural laboratory for investigating lithosphere formation and evolution, and has become an international focus of broad geoscientific investigation following the discovery of economic diamondiferous kimberlite pipes. Three deep-probing magnetotelluric surveys have recently been carried out on the craton using novel acquisition procedures. The magnetotelluric responses reveal an unexpected and remarkable anomaly in electrical conductivity, collocated with the kimberlite field that is modeled as a spatially confined upper mantle region of low resistivity (<30 Ω·m) at depths of 80–100+ km, and is interpreted to be due to dissolved hydrogen or carbon in graphite form. This geophysically anomalous upper mantle region is also spatially coincident with a geochemically defined ultradepleted harzburgitic layer. The tectonic processes that emplaced this structure are possibly related to the lithospheric subduction and trapping of overlying oceanic mantle at 2630–2620 Ma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.