Tectonic controls on the nature of large silicic calderas in volcanic arcs

Abstract

Research Article| August 01, 2008 Tectonic controls on the nature of large silicic calderas in volcanic arcs Gwyneth R. Hughes; Gwyneth R. Hughes * 1Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall, Building 320, Stanford, California 94305-2115, USA *E-mail: gwyneth@stanford.edu. Search for other works by this author on: GSW Google Scholar Gail A. Mahood Gail A. Mahood 1Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall, Building 320, Stanford, California 94305-2115, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Gwyneth R. Hughes * 1Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall, Building 320, Stanford, California 94305-2115, USA Gail A. Mahood 1Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall, Building 320, Stanford, California 94305-2115, USA *E-mail: gwyneth@stanford.edu. Publisher: Geological Society of America Received: 20 Jan 2008 Revision Received: 23 Apr 2008 Accepted: 25 Apr 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (8): 627–630. https://doi.org/10.1130/G24796A.1 Article history Received: 20 Jan 2008 Revision Received: 23 Apr 2008 Accepted: 25 Apr 2008 First Online: 02 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 Gwyneth R. Hughes, Gail A. Mahood; Tectonic controls on the nature of large silicic calderas in volcanic arcs. Geology 2008;; 36 (8): 627–630. doi: https://doi.org/10.1130/G24796A.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 Silicic magma bodies stabilize the continental margin by redistributing low-density material into the upper crust. We examined the tectonic traits of 91 young, arc-related, silicic calderas to test previous assertions that the nature of voluminous silicic arc volcanism depends on specific tectonic characteristics. We find that caldera occurrence positively correlates with convergence rate except in arcs with backarc spreading, which have few or no calderas. Calderas located on oceanic and young continental crust are predominantly dacitic, whereas rhyolitic calderas are mainly located on Mesozoic or older continental crust under extension. Occurrence does not increase with greater local subduction obliquity or duration of present arc activity. Our determination of controls on the formation and composition of silicic calderas in volcanic arcs contributes to the study of continental evolution. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.