Oxidation state of subarc mantle

Abstract

Research Article| September 01, 2012 Oxidation state of subarc mantle K.A. Evans; K.A. Evans 1School of Applied Geology, Curtin University, GPO Box 1987, WA 6845, Australia Search for other works by this author on: GSW Google Scholar M.A. Elburg; M.A. Elburg 2Department of Geology and Soil Science, Ghent University, Krijgslaan 281 S8, 9000 Ghent, Belgium3School of Geological Sciences, University of KwaZulu-Natal, Private Bag x54001, 4000 Durban, South Africa Search for other works by this author on: GSW Google Scholar V.S. Kamenetsky V.S. Kamenetsky 4School of Earth Sciences, and CODES Centre of Excellence in Ore Deposits, University of Tasmania, Hobart, Tasmania 7001, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information K.A. Evans 1School of Applied Geology, Curtin University, GPO Box 1987, WA 6845, Australia M.A. Elburg 2Department of Geology and Soil Science, Ghent University, Krijgslaan 281 S8, 9000 Ghent, Belgium3School of Geological Sciences, University of KwaZulu-Natal, Private Bag x54001, 4000 Durban, South Africa V.S. Kamenetsky 4School of Earth Sciences, and CODES Centre of Excellence in Ore Deposits, University of Tasmania, Hobart, Tasmania 7001, Australia *E-mail: k.evans@curtin.edu.au; elburg@ukzn.ac.za; dima.kamenetsky@utas.edu.au. Publisher: Geological Society of America Received: 18 Nov 2011 Revision Received: 12 Feb 2012 Accepted: 24 Mar 2012 First Online: 09 Mar 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (9): 783–786. https://doi.org/10.1130/G33037.1 Article history Received: 18 Nov 2011 Revision Received: 12 Feb 2012 Accepted: 24 Mar 2012 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 K.A. Evans, M.A. Elburg, V.S. Kamenetsky; Oxidation state of subarc mantle. Geology 2012;; 40 (9): 783–786. doi: https://doi.org/10.1130/G33037.1 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 The subarc mantle is a primary control on the composition of arc magmas and the formation of arc-related ore deposits. Elevated ferric iron contents in arc lavas have been interpreted as a record of subarc mantle that is oxidized relative to mid-oceanic ridge basalt (MORB), but this conclusion is controversial. Measurements of spinel compositions in primitive arc lavas imply an arc magma source 1–4 log units more oxidized than MORB and ocean island basalts analyzed using the same technique. Samples from seven arcs show a significant correlation (P < 0.0005) between redox budget, subduction zone convergence rate, and subduction zone age. These results support the notion of oxidized arc lavas in the mantle source zone, but resolution of contradictory evidence regarding subarc mantle redox state requires further work. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.