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- W2742269032 abstract "Research Article| August 04, 2017 Mantle flow along the eastern North American margin inferred from shear wave splitting Colton Lynner; Colton Lynner * 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA *E-mail: cll44@email.arizona.edu Search for other works by this author on: GSW Google Scholar Miles Bodmer Miles Bodmer 2Department of Earth Sciences, University of Oregon, Eugene, Oregon 97403, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Colton Lynner * 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA Miles Bodmer 2Department of Earth Sciences, University of Oregon, Eugene, Oregon 97403, USA *E-mail: cll44@email.arizona.edu Publisher: Geological Society of America Received: 20 Jan 2017 Revision Received: 17 Apr 2017 Accepted: 21 May 2017 First Online: 04 Aug 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (10): 867–870. https://doi.org/10.1130/G38980.1 Article history Received: 20 Jan 2017 Revision Received: 17 Apr 2017 Accepted: 21 May 2017 First Online: 04 Aug 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Colton Lynner, Miles Bodmer; Mantle flow along the eastern North American margin inferred from shear wave splitting. Geology 2017;; 45 (10): 867–870. doi: https://doi.org/10.1130/G38980.1 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 Passive tectonic margins, the transition between continental and oceanic lithospheres, represent a quiescent stage in plate tectonics where active lithospheric deformation along the boundary has ceased. Despite these being globally ubiquitous features, little is known about the mantle dynamics associated with passive margins owing to the difficulty of obtaining margin-crossing seismic data sets. Combining ocean-bottom seismic data from the recent Eastern North American Margin Community Seismic Experiment and onshore data from the EarthScope Transportable Array and other deployments, we assimilate a seismic data set spanning the passive eastern North American margin (ENAM). We infer mantle dynamics along the margin using observations of shear wave splitting. Offshore, we observe margin-parallel fast splitting directions that are inconsistent with either plate-driven flow or paleo-spreading frozen-in anisotropy. Instead, splitting beneath the oceanic plate likely indicates margin-parallel mantle flow. Onshore measurements east of the craton edge show predominantly null splitting, suggesting vertically oriented flow. The heterogeneity of shear wave splitting across the ENAM suggests a unique dynamic response of the upper mantle to the presence of the passive margin. We propose that a margin-wide geodynamic process (e.g., pressure- and/or density-driven flow or edge-driven convection) drives dynamics beneath both the onshore and offshore regions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2742269032 title "Mantle flow along the eastern North American margin inferred from shear wave splitting" @default.
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