The fate of subducted sediments: A case for backarc intrusion and underplating

Research Article| December 01, 2007 The fate of subducted sediments: A case for backarc intrusion and underplating Claire A. Currie; Claire A. Currie 1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Search for other works by this author on: GSW Google Scholar Christopher Beaumont; Christopher Beaumont 1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Search for other works by this author on: GSW Google Scholar Ritske S. Huismans Ritske S. Huismans 2Department of Earth Science, Bergen University, Bergen N-5007, Norway Search for other works by this author on: GSW Google Scholar Author and Article Information Claire A. Currie 1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Christopher Beaumont 1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Ritske S. Huismans 2Department of Earth Science, Bergen University, Bergen N-5007, Norway Publisher: Geological Society of America Received: 18 May 2007 Revision Received: 28 Jul 2007 Accepted: 02 Aug 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (12): 1111–1114. https://doi.org/10.1130/G24098A.1 Article history Received: 18 May 2007 Revision Received: 28 Jul 2007 Accepted: 02 Aug 2007 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Claire A. Currie, Christopher Beaumont, Ritske S. Huismans; The fate of subducted sediments: A case for backarc intrusion and underplating. Geology 2007;; 35 (12): 1111–1114. doi: https://doi.org/10.1130/G24098A.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 Subduction of oceanic and continental sediments into the mantle is fundamental to the geochemical evolution of Earth. Using thermal-mechanical models, we examine the dynamics of sediments that are subducted below continental lithosphere. Owing to their low density relative to the mantle, model sediments detach from the subducting plate at ∼100 km depth. With ongoing subduction, a subhorizontal sediment plume develops and intrudes the continental lithosphere. This occurs for a wide range of sediment densities and rheologies, suggesting that sediment detachment may be important for regions where the subducted sediment thickness is larger than ∼350 m. In these areas, a reservoir of sediments may be found in the shallow backarc mantle. In contrast to models of sediment transport to the deep mantle, the detachment model predicts chemical and mechanical interactions between the sediments and backarc mantle lithosphere and a shallow sediment source for arc and backarc magmas. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.