Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT09] Hard-Rock Drilling: Oceanic Lithosphere to Continental Crust Formation

Mon. May 23, 2016 10:45 AM - 12:15 PM Convention Hall A (2F)

Convener:*Yoshihiko Tamura(R & D Center for Ocean Drilling Science, Japan Agency for Maine-Earth Science and Technology), Tomoaki Morishita(School of Natural System, Colleage of Science and Technology, Kanazawa University), Susanne Straub(Lamont-Doherty Earth Observatory, Columbia Univ., USA), Takashi Sano(Department of Geology and Paleontology, National Museum of Nature and Science), Susumu Umino(Department of Earth Sciences, Kanazawa University), Eiichi TAKAZAWA(Department of Geology, Faculty of Science, Niigata University), Katsuyoshi Michibayashi(Institute of Geosciences, Shizuoka University), Chair:Eiichi TAKAZAWA(Department of Geology, Faculty of Science, Niigata University), Takashi Sano(Department of Geology and Paleontology, National Museum of Nature and Science)

A limited number of IODP expeditions have been conducted for hard-rock drilling for the last decade including most recent expeditions investigating the northern Izu-Bonin-Mariana (IBM) subduction system during 2014 (Expeditions 350, 351 and 352). In this session, we review the current status of our understanding for oceanic lithosphere and continental crust formation or anything important beyond and discuss significant issue to be answered by up-coming/future hard-rock drilling, which include Mohole and IBM-4 drilling into continental crust in the oceanic arc. The session invites contributions from interdisciplinary field ranging from geophysics, geochemistry, petrology, engineering and biology working on hard-rock cores/samples from the expeditions or any other research vessels as well as ICDP and on-land geology such as ophiolites. Results from the three IBM Expeditions are also welcome.

11:45 AM - 12:00 PM

[SIT09-11] From Birth to Death: Fate of The Extremely High-T Subduction Zone of The Oman Ophiolite

★Invited papers

*Susumu Umino1, Yuki Kusano2, Keitaro Kitamura3, Kyoko Kanayama4, Kazuyha Nagaishi5, Tsuyoshi Ishikawa6, Ryo Otsuka1 (1.Department of Earth Sciences, Kanazawa University, 2.Geological Survey of Japan, AIST, 3.Asia Air Survey Co., Ltd., 4.Tottori Prefectural Museum, 5.Marine Works Japan Ltd., 6.Kochi Institute for Core Sample Research, JAMSTEC)

12:00 PM - 12:15 PM

[SIT09-12] The redox state in the Fizh mantle section, the northern Oman ophiolite as an analog of mantle wedge in subduction zone

Masafumi Tani1, *Eiichi TAKAZAWA1,2, Madhusoodhan Satish-Kumar1, Masahide Akasaka3, Yoshihiko Tamura2 (1.Department of Geology, Faculty of Science, Niigata University, 2.R & D Center for Ocean Drilling Science, Japan Agency for Maine-Earth Science and Technology, 3.Department of Geoscience, Shimane University)