[S-CG61] Ocean Floor Geoscience

Thu. May 24, 2018 9:00 AM - 10:30 AM 302 (3F International Conference Hall, Makuhari Messe)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Hanyu Tomoko, Fujii Masakazu(国立極地研究所)

Most of Earth's volcanism and much of its tectonic activity occur on and beneath the seafloor. Various phenomena on the seafloor are closely linked to plate tectonics, Earth structure and dynamics, and also related to Earth's environments through the hydrosphere and atmosphere. Seafloor rocks and sediments record Earth's evolution and heat and material fluxes on the Earth. Ocean Floor Geoscience session covers a broad range of research on seafloor such as mid-ocean ridge process, subduction dynamics, arc magmatism, hot spot and LIPs, crustal movement and structure etc. Every field of researches and every approaches are welcomed. The session aims to encourage discussion among scientists from different study fields and to integrate our understanding of ocean floor. The session is co-dhaired by K. Tadokoro (Nagoya Univ.), O. Ishizuka (AIST), T. Toki (Univ. Ryukyu), and N. Takahashi (JAMSTEC).

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9:00 AM - 9:15 AM

[SCG61-13] Seafloor spreading history of the Cosmonauts Sea, off East Antarctica

*Tomoko Hanyu¹, Yoshifumi Nogi^1,2, Masakazu Fujii^1,2 (1.The Graduate University for Advanced Studies, 2.National Institute of Polar Research)

9:15 AM - 9:30 AM

[SCG61-14] Possible Evolution of Volcanic Activity of a subducting spreading ridge at the Chile Triple Junction based on geomagnetic survey data

*Takeshi Matsumoto¹, Takanori Ishihara¹, Yoshifumi Nogi² (1.Faculty of Science, University of the Ryukyus, 2.National Institute of Polar Research)

9:30 AM - 9:45 AM

[SCG61-15] A hypothesis to explain asymmetry seafloor spreading in back-arc basins: Evidences from the Southern Mariana back-arc basin and Numerical modelling

*Nobukazu Seama¹, Tomoeki Nakakuki², Tetsuo Matsuno³, Kyoko Okino⁴ (1.Department of Planetology, Graduate School of Science, Kobe University, 2.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 3.Kobe Ocean Bottom Exploration Center, Kobe University, 4.Atmosphere and Ocean Research Institute, University of Tokyo)

9:45 AM - 10:00 AM

[SCG61-16] Magnetization of oceanic lithosphere: Rock magnetism for characterization of submarine volcanism in the Okinawa Trough

*Masakazu Fujii^1,2, Hiroshi Sato³, Tatsuo Nozaki⁴, Yutaro Takaya⁵ (1.National Institute of Polar Research, 2.The Graduate University for Advanced Studies (SOKENDAI), 3.Senshu University, 4.Japan Agency for Marine-Earth Science and Technology, 5.Waseda University)

10:00 AM - 10:15 AM

[SCG61-17] Structural development in mantle associated with hydration during transform faulting

*Kakihata Yuki¹, Katsuyoshi Michibayashi¹, Henry J.B. Dick² (1.Shizuoka University Graduate School of Science, 2.Woods Hole Oceanographic Institution)

10:15 AM - 10:30 AM

[SCG61-18] Does the depth profile of chemical properties in Ogasawara(Bonin)-Mariana trench peridotites indicate a vertical profile of mantle?

*Katsuyoshi Michibayashi^1,2,4, Shigeki Uehara², Suzu Saito¹, Yasuhiko Ohara³ (1.Institute of Geosciences, Shizuoka University, 2.Graduate School of Geosciences, Shizuoka University, 3.Hydrographic and oceanographic department of Japan, 4.Department of Earth and Planetary Sciences, Nagoya University)

Session information