Strontium isotopic relations of bimodal volcanic rocks at Kikai volcano in the Ryūkyū arc, Japan

Abstract

Research Article| April 01, 1987 Strontium isotopic relations of bimodal volcanic rocks at Kikai volcano in the Ryūkyū arc, Japan Kenji Notsu; Kenji Notsu 1Institute of Chemistry, University of Tsukuba, Sakura-mura, Niihari-gun, Ibaraki 305, Japan Search for other works by this author on: GSW Google Scholar Koji Ono; Koji Ono 2Geological Survey of Japan, Yatabe-machi, Tsukuba-gun, Ibaraki 305, Japan Search for other works by this author on: GSW Google Scholar Tatsunori Soya Tatsunori Soya 2Geological Survey of Japan, Yatabe-machi, Tsukuba-gun, Ibaraki 305, Japan Search for other works by this author on: GSW Google Scholar Geology (1987) 15 (4): 345–348. https://doi.org/10.1130/0091-7613(1987)15<345:SIROBV>2.0.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 Kenji Notsu, Koji Ono, Tatsunori Soya; Strontium isotopic relations of bimodal volcanic rocks at Kikai volcano in the Ryūkyū arc, Japan. Geology 1987;; 15 (4): 345–348. doi: https://doi.org/10.1130/0091-7613(1987)15<345:SIROBV>2.0.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 Bimodal associations of mafic and silicic rocks are observed at Kikai volcano in the Ryūkyū arc, Japan. We determined 87Sr/86Sr ratios of 16 representative volcanic rocks of this volcano. The ratios scatter in the narrow range between 0.70477 and 0.70508, despite the varying SiO2 content of the rocks, except for one sample with a ratio of 0.70539. This suggests that both basaltic and rhyolitic rocks at Kikai volcano are generated from the same source material, in contrast to the separate origin required for the bimodal volcanism typically observed in the western United States. The origin of the bimodal volcanism in the island-arc setting is distinctly different from that in the continental setting, in view of source materials of basaltic and rhyolitic magmas. 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.