[S-CG56] Ocean Floor Geosciences

Sun. May 26, 2019 9:00 AM - 10:30 AM A05 (TOKYO BAY MAKUHARI HALL)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:shuhei Totsuka, Ayanori Misawa

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 and atmosphere. Seafloor rocks and sediments record Earth's evolution and heat and material fluxes on the Earth. Ocean Floor Geosciences session covers a broad range of research on LIPs, crustal movement and structure etc. Any fields of research and approach 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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9:00 AM - 9:15 AM

[SCG56-01] The restoration of precipitation record of iron hydroxide about seven years in Nagahama Bay, Satsuma Iwo-jima, Kagoshima.

*Naoya Sakamoto¹, Shoichi Kiyokawa² (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University)

9:15 AM - 9:30 AM

[SCG56-02] Mineralogical and geochemical study of hydrothermal deposits beneath the seafloor at the Gondou field in the Okinawa Trough

*Shuhei Totsuka¹, Jun-ichiro Ishibashi², Kazuhiko Shimada², Kei Ikehata³, Hideaki Machiyama⁴, Koichi Iijima⁴, Hirofumi Yamamoto⁴, Hidenori Kumagai⁴, Ken Ikehara⁵, Toru Yamasaki⁵, Yutaro Takaya⁶, Toshiro Nagase⁷, Thomas Tindell⁸, Kotaro Yonezu⁸, Yuki Tada⁸ (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University, 3.Faculty of Life and Environmental Sciences, University of Tsukuba, 4.Research and Development Center for Submarine Resources, JAMSTEC, 5.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 6.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University, 7.Tohoku University Museum, 8.Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University)

9:30 AM - 9:45 AM

[SCG56-03] Strontium isotope study of sulfate minerals obtained by scientific drilling from seafloor hydrothermal fields in the Okinawa Trough

Akihi Tsutsumi¹, Naru Tsukamoto¹, Kazuhiko Shimada¹, *Jun-ichiro Ishibashi¹, Ryuichi Shinjo² (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Faculty of Science, University of Ryukyus)

9:45 AM - 10:00 AM

[SCG56-04] Numerical modeling of seafloor hydrothermal system in the Izena Caldron, Okinawa Trough

*Shohei Albert Tomita¹, Katsuaki Koike¹, Tada-nori Goto¹, Katsuhiko Suzuki², Takafumi Kasaya² (1.Graduate School of Engineering, Kyoto University, 2. Japan Agency for Marine-Earth Science and Technology)

10:00 AM - 10:15 AM

[SCG56-05] Electrical conductivity and spectral IP characteristics in the rock samples obtained in seafloor hydrothermal area and interpretation of them

*Yusuke Ohta¹, Tada-nori Goto¹, Katsuaki Koike¹, Weiren Lin¹, Koki Kashiwaya¹, Tadai Osamu³, Takafumi Kasaya², Toshiya Kanamatsu², Hidenori Kumagai², Hideaki Machiyama² (1.Kyoto University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Marine Works Japan)

10:15 AM - 10:30 AM

[SCG56-06] Geological structure north offshore Ishigaki-Jima estimated from seismic reflection survey

*Ayanori Misawa¹, Seishiro Furuyama^2,1, Masahiko Sato^3,1, Jih-Shin Chang¹, Takahiko Inoue¹, Kohsaku Arai¹ (1.Geological Survey of Japan, AIST, 2.Tokyo University of Marine Science and Technology, 3.The University of Tokyo)

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