Obliquity between seismic and electrical anisotropies as a potential indicator of movement sense for ductile shear zones in the upper mantle

Research Article| November 01, 1996 Obliquity between seismic and electrical anisotropies as a potential indicator of movement sense for ductile shear zones in the upper mantle Shaocheng Ji; Shaocheng Ji 1Département de Géologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada Search for other works by this author on: GSW Google Scholar Stephane Rondenay; Stephane Rondenay 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Search for other works by this author on: GSW Google Scholar Marianne Mareschal; Marianne Mareschal 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Search for other works by this author on: GSW Google Scholar Guy Senechal Guy Senechal 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Shaocheng Ji 1Département de Géologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada Stephane Rondenay 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Marianne Mareschal 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Guy Senechal 2Génie Minéral, École Polytechnique, C.P. 6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (11): 1033–1036. https://doi.org/10.1130/0091-7613(1996)024<1033:OBSAEA>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 Email Tools Icon Tools Get Permissions Search Site Citation Shaocheng Ji, Stephane Rondenay, Marianne Mareschal, Guy Senechal; Obliquity between seismic and electrical anisotropies as a potential indicator of movement sense for ductile shear zones in the upper mantle. Geology 1996;; 24 (11): 1033–1036. doi: https://doi.org/10.1130/0091-7613(1996)024<1033:OBSAEA>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 Teleseismic shear-wave splitting and magnetotelluric experiments across the Grenville front, between the Archean craton and the Proterozoic Grenville province in the regions of the Pontiac subprovince and northwestern Grenville province (Canada), show a consistent obliquity between the polarization direction of the fast split shear wave Φ and the most electrically conductive direction (ΦMT) in the upper mantle transcurrent shear zones. At all well-recorded stations, Φ is nearly N103°E, and ΦMT is approximately N80°E. The obliquity may be considered a potential kinematic indicator, because the seismic and electrical anisotropies are thought to be controlled by lattice-preferred and shape-preferred orientations of mantle minerals (mainly olivine), respectively. The dextral movement sense of the transcurrent shear zones in the mantle, inferred from the observed obliquity, is consistent with that inferred from surface geology of the crustal shear zones. This consistency implies that deformation of the crust and the subcrustal upper mantle in the lithosphere was largely coherent in the study region. 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.