[S-CG55] Ocean Floor Geoscience

Tue. May 27, 2025 3:30 PM - 5:00 PM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

convener:Takeshi Iinuma(National Research and Development Agency Japan Agency for Marine-Earth Science and Technology), Masakazu Fujii(National Institute of Polar Research and SOKENDAI), Satoko Owari(Tokyo University of Marine Science and Technology), Yojiro Yamamoto(Japan Agency for Marine-Earth Science and Technology), Chairperson:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Yojiro Yamamoto(Japan Agency for Marine-Earth Science and Technology)

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.

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3:30 PM - 3:45 PM

[SCG55-07] Geochemistry and detrital debris uptake fluxes of ferromanganese crusts in the western North Pacific Ocean

*Mikasa Ishigaki¹, Keishiro Azami², Kazutaka Yasukawa¹, Kentaro Nakamura^1,2, Yasuhiro Kato^1,2 (1.School of Engineering, the University of Tokyo, 2.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology)

3:45 PM - 4:00 PM

[SCG55-08] Geochronological study of sediment cores collected from the Ieyama hydrothermal field in the Okinawa Trough

*Jun-ichiro Ishibashi^1,2, Shin Toyoda³, Yushi Itatani², Yusuke Okazaki² (1.Kobe Ocean-Bottom Exploration Center, Kobe University, 2.Faculty of Science, Kyushu University, 3.Okayama University of Science)

4:00 PM - 4:15 PM

[SCG55-09] Studying Oceanic Lithosphere via Cosmic-ray Muography of Samail Ophiolite

*Laszlo Olah^1,6, Susumo Umino², Yuki Kusano³, Tomoaki Morhishita², Said M. Al Musharrafi⁴, Ibrahim Al Sawafi⁴, Nasser Saif Said El-Maawali⁴, Hiroyuki K.M. Tanaka^5,6, László Tercsi¹, Dezső Varga^1,6 (1.HUN-REN Wigner Research Centre for Physics, Hungary, 2.Kanazawa University, Japan, 3.Geological Survey of Japan, Japan, 4.Ministry of Energy and Minerals, Sultanate of Oman, 5.The University of Tokyo, Japan, 6.International Virtual Muography Institute (VMI), Global)

4:15 PM - 4:30 PM

[SCG55-10] MOWALL-CIR: Investigation of Marie Celeste Long Oceanic Transform -Preliminary Report of Hakuho-maru KH-24-4 Cruise-

*Kyoko Okino¹, Shiki Machida², Tomoaki Morishita³, Katsuyoshi Michibayashi⁴, Akira Ishikawa⁵, Naoto Hirano⁶, Yibing Li⁷, Masakazu Fujii⁸, Nobukazu Seama⁹, Yuki Minegishi¹, Takuya Yahagi¹, Michinari Sunamura¹⁰, Akiko Makabe¹¹, Scientific Team KH-24-4 (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Chiba Institute of Technology , 3.Kanazwa University , 4.Nagoya University, 5.Institute of Science Tokyo, 6.Tohoku University , 7.Chinese Acaemy of Geological Science, 8.National Institute of Polar Research, 9.Kobe University , 10.The University of Tokyo, 11.Japan Agency for Marine-Earth Science and Technology )

4:30 PM - 4:45 PM

[SCG55-11] Interaction between seafloor spreading and arc formation

*Osamu Ishizuka¹, Taichi Sato¹, Gen Shimoda¹, Yumiko Harigane¹, Susumu Umino², Trinh Nguyen Thi My², Izumi Sakamoto³, Nozomi Nakamura⁸, Satoshi Watanabe³, Kouki Mori⁴, Yuka Yokoyama³, Kenichiro Tani⁵, Rex N. Taylor⁶, Yasuhiko Ohara⁷, Chris Conway¹ (1.Geological Survey of Japan, AIST, 2.Kanazawa University, 3.Tokai University, 4.Chiba University, 5.National Museum of Nature and Science, 6.University of Southampton, 7.HODJ, 8.Kokusai Kogyo Co., Ltd.)

4:45 PM - 5:00 PM

[SCG55_27PM2-6add] Discussion

Session information