[S-CG48] Ocean Floor Geoscience

Wed. May 29, 2024 1:45 PM - 3:00 PM 302 (International Conference Hall, Makuhari Messe)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Keiichi Tadokoro(Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University), Chairperson:Hironori Otsuka(Kobe University), Mari Hamahashi(Yamaguchi University, Faculty of Global and Science Studies)

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's structure and dynamics, and also related to Earth's environments through the hydrosphere and atmosphere. Seafloor-derived rocks and sediments record Earth's evolution and heat/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 and intraplate magmatism, crustal movement and structre, etc. Every field of research and every approach are welcomed. The session aims to encourage discussion among scientists from different study fields and to integrate our understanding of the ocean floor. The session is co-chaired by K. Okino (Univ. Tokyo), K. Tadokoro (Nagoya Univ.), T. Toki (Univ. Ryukyus), Y. Yamamoto (JAMSTEC) and N. Akizawa (Univ. Tokyo).

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1:45 PM - 2:00 PM

[SCG48-11] Possible evidence of the 17th century great earthquake off Hokkaido: Marine paleoseismology in the landward slope of the Kuril trench

*Toshiya Kanamatsu¹, KanHsi Hsiung¹, RYO NAKANISHI², Kaoru Kubota¹, Ken Ikehara³, Yu-Chun Chang¹, Toshiya Fujiwara¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Kyoto Univesity, 3.National Institute of Advanced Industrial Science and Technology)

2:00 PM - 2:15 PM

[SCG48-12] Tracking past huge earthquakes in the trench-fill deposits in a Japan Trench basin: IODP 1010-APL2 JTRACK-Deep-time Paleoseismology

*Ken Ikehara¹, Michael Strasser², Troy Rasbury³, Yasuyuki Nakamura⁴, proponents IODP 1010-APL2 (1.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, 2.University of Innsbruck, 3.Stony Brook University, 4.Japan Agency for Marine-Earth Science and Technology)

2:15 PM - 2:30 PM

[SCG48-13] Submersible survey along the Shionomisaki submarine canyon in the Nankai Trough: Preliminary results of R/V Yokosuka YK23-10S cruis

*Asuka Yamaguchi¹, Rina Fukuchi², Yohei Hamada², Hiroaki Koge⁴, Kiichiro Kawamura⁵, Akira Ijiri⁶, Hanaya Okuda³, Mari Hamahashi⁵, Konosuke TERUI¹, Takahiro Hosokawa⁷, Kanji Tatsumi⁶, Juichiro Ashi¹, Takafumi Kasaya³, Masataka Kinoshita¹, Koji Kameo⁸, Yoshimi Kubota⁹, Takeshi Tsuji¹, Kazuya Shiraishi³, Gaku Kimura³ (1.The University of Tokyo, 2.Naruto University of Education, 3.JAMSTEC, 4.GSJ, AIST, 5.Yamaguchi University, 6.Kobe University, 7.Kochi University, 8.Chiba University, 9.National Museum of Nature and Science)

2:30 PM - 2:45 PM

[SCG48-14] Acoustc stratigraphy and crustal deformation in Osaka Bay after the last glacial period

Tomohiro Iwanami², *Hironori Otsuka¹, Tetsuo Matsuno¹, Nobukazu Seama², Mari Hamahashi³, Mamoru Sano^1,4, Hikaru Iwamaru^1,4, Keita Suzuki^1,4, Hiroko Sugioka² (1.KOBEC, Kobe University, 2.Department of Planetology, Kobe University, 3.Yamaguchi University, Faculty of Global and Science Studies, 4.Nippon Marine Enterprises)

2:45 PM - 3:00 PM

[SCG48-15] Bathymetric and geological observation using AUV and other instruments on the East China Sea slope: wavy bedforms and channel-like structures near Oki-Danjo Hills

*Ryoichi Horinouchi ¹, Keita Saito¹, Ryosuke Nagasawa¹, Manabu Ushijima¹, Tetsuhiro Etou¹, Takeshi Tomohisa¹, Tomoki Kawakami¹, Tomo Aoki¹, Yuka Tatera¹ (1.Japan Coast Guard )

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