Dynamical causes for incipient magma chambers above slabs

Research Article| January 01, 2004 Dynamical causes for incipient magma chambers above slabs Taras V. Gerya; Taras V. Gerya 1Institute of Geology, Mineralogy, and Geophysics, Ruhr-University Bochum, 44780 Bochum, Germany, and Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, Moscow, Russia Search for other works by this author on: GSW Google Scholar David A. Yuen; David A. Yuen 2University of Minnesota Supercomputing Institute and Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455-0219, USA Search for other works by this author on: GSW Google Scholar Erik O.D. Sevre Erik O.D. Sevre 2University of Minnesota Supercomputing Institute and Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455-0219, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Taras V. Gerya 1Institute of Geology, Mineralogy, and Geophysics, Ruhr-University Bochum, 44780 Bochum, Germany, and Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, Moscow, Russia David A. Yuen 2University of Minnesota Supercomputing Institute and Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455-0219, USA Erik O.D. Sevre 2University of Minnesota Supercomputing Institute and Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455-0219, USA Publisher: Geological Society of America Received: 15 Jul 2003 Revision Received: 12 Sep 2003 Accepted: 15 Sep 2003 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (1): 89–92. https://doi.org/10.1130/G20018.1 Article history Received: 15 Jul 2003 Revision Received: 12 Sep 2003 Accepted: 15 Sep 2003 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Taras V. Gerya, David A. Yuen, Erik O.D. Sevre; Dynamical causes for incipient magma chambers above slabs. Geology 2004;; 32 (1): 89–92. doi: https://doi.org/10.1130/G20018.1 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 Using a regional upper-mantle model with an unprecedented spatial resolution of ∼100 m, we have investigated at multiple resolutions the character of incipient magma chambers forming under oceanic arcs. The magma chambers are formed from wave-like structures propagating upward along descending slabs and consist of compositionally buoyant, hydrated, partially molten subducted crustal and mantle material. These wave structures are 300–500 °C colder than the mantle wedge and may have an upward velocity of >1 m/yr. Inverted temperature structures and transitory bimodal magmatism are plausible consequences of finger-like penetration of relatively cold, hydrated material of the incipient magma chambers into the hot mantle wedge. Apart from forming and periodic feeding of the magma chambers, "cold" waves may also transport upward thousands of cubic kilometers of subducted material and may cause the rapid exhumation of ultrahigh-pressure rocks along slabs. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.