Backflow and margin-parallel shear within an ancient subduction complex

Research Article| January 01, 1992 Backflow and margin-parallel shear within an ancient subduction complex Vicki L. Hansen Vicki L. Hansen 1Department of Geological Sciences, Southern Methodist University, Dallas, Texas 75275-0395 Search for other works by this author on: GSW Google Scholar Geology (1992) 20 (1): 71–74. https://doi.org/10.1130/0091-7613(1992)020<0071:BAMPSW>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 Vicki L. Hansen; Backflow and margin-parallel shear within an ancient subduction complex. Geology 1992;; 20 (1): 71–74. doi: https://doi.org/10.1130/0091-7613(1992)020<0071:BAMPSW>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 Lineated and foliated tectonites of the Teslin suture zone, Yukon, represent the deep-seated part of a west-dipping subduction complex that formed seaward of western North America in Permian-Triassic time. The tectonites were progressively underplated onto the hanging wall plate during B-type subduction. With continued subduction and underplating, the boundary between the hanging wall and subduction channel migrated oceanward, resulting in "growth" of the hanging-wail plate at depth. These tectonites preserve a progressive record of backflow, dextral margin-parallel shear, and downflow within the subduction channel. Early Jurassic A-type subduction of the leading edge of western North America resulted in eastward overthrusting of the tectonites as a coherent block onto North American strata. These tectonites provide empirical evidence that backflow, margin-parallel displacement, and downflow can all occur within the deeper parts of subduction zones. 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.