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Upwelling, rifting, and age-progressive magmatism from the Oki-Daito mantle plume

2013; Geological Society of America; Volume: 41; Issue: 9 Linguagem: Inglês

10.1130/g34525.1

1943-2682

Osamu Ishizuka, Rex N. Taylor, Yasuhiko Ohara, Motohiro Yuasa,

High-pressure geophysics and materials

Research Article| September 01, 2013 Upwelling, rifting, and age-progressive magmatism from the Oki-Daito mantle plume Osamu Ishizuka; Osamu Ishizuka * 1Institute of Geology and Geoinformation, Geological Survey of Japan/AIST, Central 7, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8567, Japan2Institute For Research on Earth Evolution, JAMSTEC, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan *E-mail: o-ishizuka@aist.go.jp. Search for other works by this author on: GSW Google Scholar Rex N. Taylor; Rex N. Taylor 3Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, UK Search for other works by this author on: GSW Google Scholar Yasuhiko Ohara; Yasuhiko Ohara 2Institute For Research on Earth Evolution, JAMSTEC, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan4Hydrographic and Oceanographic Department of Japan, 2-5-18 Aomi, Koto-ku, Tokyo 135-0064, Japan Search for other works by this author on: GSW Google Scholar Makoto Yuasa Makoto Yuasa 1Institute of Geology and Geoinformation, Geological Survey of Japan/AIST, Central 7, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8567, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Osamu Ishizuka * 1Institute of Geology and Geoinformation, Geological Survey of Japan/AIST, Central 7, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8567, Japan2Institute For Research on Earth Evolution, JAMSTEC, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan Rex N. Taylor 3Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, UK Yasuhiko Ohara 2Institute For Research on Earth Evolution, JAMSTEC, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan4Hydrographic and Oceanographic Department of Japan, 2-5-18 Aomi, Koto-ku, Tokyo 135-0064, Japan Makoto Yuasa 1Institute of Geology and Geoinformation, Geological Survey of Japan/AIST, Central 7, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8567, Japan *E-mail: o-ishizuka@aist.go.jp. Publisher: Geological Society of America Received: 27 Feb 2013 Revision Received: 02 May 2013 Accepted: 10 May 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (9): 1011–1014. https://doi.org/10.1130/G34525.1 Article history Received: 27 Feb 2013 Revision Received: 02 May 2013 Accepted: 10 May 2013 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Osamu Ishizuka, Rex N. Taylor, Yasuhiko Ohara, Makoto Yuasa; Upwelling, rifting, and age-progressive magmatism from the Oki-Daito mantle plume. Geology 2013;; 41 (9): 1011–1014. doi: https://doi.org/10.1130/G34525.1 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 Volcanism at the western margin of the Pacific Ocean has developed above subducting ocean crust, generating island arcs and spreading basins; however, the controls on magmatism at and before the initiation of subduction are less clear. We present new 40Ar/39Ar data from a 1000 km northwest-southeast line of oceanic plateaus on the Philippine Sea plate demonstrating that they formed as a time-progressive volcanic chain mirrored on either side of the West Philippine Basin backarc spreading center. In the north this chain is bounded by a Mesozoic remnant arc, and in the south by subduction beneath the Philippine arc. Geochemically these oceanic plateaus have an EM-2 (enriched mantle 2) ocean island basalt signature matching the older 45–51 Ma volcanic edifices discovered overlapping the remnant arc and intervening basins. The wide distribution of these edifices could mark the first arrival of upwelling mantle, which also mixed with local mid-oceanic-ridge basalt during contemporaneous West Philippine Basin spreading. These features are consistent with the extension and splitting of the Mesozoic arc terrane, driven by regional upwelling centered on the impact of the Oki-Daito mantle plume at 51 Ma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.