[S-CG45] Ocean Floor Geoscience

Sat. Jun 5, 2021 10:45 AM - 12:15 PM Ch.19 (Zoom Room 19)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Ryuta Arai(Japan Agency for Marine-Earth Science and Technology), Masakazu Fujii(National Institute of Polar Research and SOKENDAI)

Most of Earth's volcanism and much of its tectonic activity occur on and beneath the s eafloor. Various phenomena on the seafloor are closely linked to plate tectonics, Earth s tructure and dynamics, and also related to Earth's environments through the hydrosphe re and atmosphere. Seafloor rocks and sediments record Earth's evolution and heat an d 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 magm atism, 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-chaired by K. Tadokoro (Nagoya Univ.), O. Ishizuka (AIST), T. Toki (Univ . Ryukyus), and N. Takahashi (JAMSTEC).

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10:45 AM - 11:00 AM

[SCG45-07] Marine and earth science surveys in the Okinawa Trough for the IODP Scientific Drilling: Hakuhomaru KH-21-3 cruise preliminary reports

*Makoto Otsubo¹, Yoshimi Kubota², Ayanori Misawa¹, Ken Ikehara¹, Saki Ishino¹, Masataka Kinoshita³, Kenji Matsuzaki⁴, Katsura Kameo⁴, Chiori Tamura⁴, Ryuta Arai⁵, Tomohiro Toki⁶, Yuki Mitsudome⁶, Zhirong Cai⁷, Keiko Takehara⁸, Kodai Kato⁸, Daisuke Kuwano⁹, Koshiro Matsuo¹⁰, Keita Suzuki¹¹, Misaki Horiuchi¹¹, Yohei Katayama¹², Satoshi Okumura¹³ (1.Geological Survey of Japan, AIST, 2.National Museum of Nature and Science, 3.The University of Tokyo, ERI, 4.The University of Tokyo, AORI, 5.JAMSTEC, 6.University of Ryukyus, 7.Kyoto University, 8.Kochi University, 9.Chiba University, 10.Kyushu University, 11.Nippon Marine Enterprises, Ltd., 12.Marine Works Japan, Ltd., 13.MOL Marine Co., Ltd.)

11:00 AM - 11:15 AM

[SCG45-08] Structure and seismicity in the southern part of the Okinawa Trough and their implications for rifting and volcanic processes

*Ryuta Arai¹, Ayanori Misawa², Makoto Otsubo², Saki Ishino², Masataka Kinoshita³, KH-21-3 Shipboard Scientists (1.Japan Agency for Marine-Earth Science and Technology, 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 3.Earthquake Research Institute, The University of Tokyo)

11:15 AM - 11:30 AM

[SCG45-09] Heat flow anomaly in the southern part of Okinawa Trough – A preliminary result from the KH-21-3 cruise-

*Masataka Kinoshita¹, Ryuta Arai², Chiori Tamura³, Ayanori Misawa⁴, Saki Ishino⁴, Makoto Otsubo⁴, Shipboard Scientists KH-21-3 (1.Earthquake Research Institute, The University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Atmospheric and Ocean Research Institute, the University of Tokyo, 4.National Institute of Advanced Industrial Science and Technology)

11:30 AM - 11:45 AM

[SCG45-10] GNSS/Acoustic geodetic measurement at the southern end of Ryukyu Trench 2014-2020

*Akihiro Nagaya¹, Ryoya Ikuta², Mamoru Nakamura³, Masataka Ando⁴ (1.Undergraduate school of department of Geoscience, Shizuoka University, 2.Faculty of Science, Shizuoka University, 3.Faculty of Science, University of the Ryukyu, 4.Center for Natural Hazards of Integrated Education and Research, Shizuoka University)

11:45 AM - 12:00 PM

[SCG45-11] Fluid-flow simulation for clarifying ore generation processes in the Izena Hole hydrothermal field, Okinawa Trough

*Shohei Albert Tomita¹, Katsuaki Koike¹, Tada-nori Goto², Katsuhiko Suzuki³, Takafumi Kasaya³ (1.Graduate School of Engineering, Kyoto University, 2.Graduate School of Life Science, University of Hyogo, 3.Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

12:00 PM - 12:15 PM

[SCG45-12] Examining the origin and depositional process of turbidites in the southern part of Okinawa Trough based on cores from Expedition KH-21-3

*Cai Zhirong¹, Hajime Naruse¹, Ken Ikehara², KH-21-3 Shipboard Scientists - (1.Department of Geology and Mineralogy, Graduate School of Science, Kyoto University, 2.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology)

Session information