Slab melting as an explanation of Quaternary volcanism and aseismicity in southwest Japan

Abstract

Research Article| May 01, 1995 Slab melting as an explanation of Quaternary volcanism and aseismicity in southwest Japan Paul A. Morris Paul A. Morris 1Department of Geology, Shimane University, 1060 Nishikawatsu, Matsue 690, Japan Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (5): 395–398. https://doi.org/10.1130/0091-7613(1995)023<0395:SMAAEO>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 Paul A. Morris; Slab melting as an explanation of Quaternary volcanism and aseismicity in southwest Japan. Geology 1995;; 23 (5): 395–398. doi: https://doi.org/10.1130/0091-7613(1995)023<0395:SMAAEO>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 Two volcanoes on the Quaternary volcanic front in southwest Japan have erupted medium-K andesite and dacite, which are chemically similar to adakites (i.e., high Al2O3, Sr/Y, low Y, and steep rare earth element [REE] patterns with no negative Eu anomalies), unlike other subduction-related volcanoes in Japan. Earthquake data and the extrapolated position of the Philippine Sea plate from its near-trench position indicate that the leading edge of the plate is ∼75–100 km deep beneath these volcanoes. Melting of the plate at this depth would leave a garnet eclogite residual, accounting for the Y and heavy REE depletion. The lack of seismic data and active volcanism in southwest Japan can be attributed to the attenuated seismic response of the plate due to melting and to the atypical nature of magma generation. 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.