[S-CG70] Ocean Floor Geoscience

Thu. May 28, 2026 3:30 PM - 5:00 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

Chairperson:Yasukawa Kazutaka(Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo), Toda Kentaro(Graduate School of Environmental Studies, TOHOKU University)

Most of Earth's volcanism and much of its tectonic activity occur on and beneath the seafloor. Various seafloor phenomena are closely linked to plate tectonics, Earth's internal structure and dynamics, and are also connected to the Earth's environments through interactions with the hydrosphere and atmosphere. Rocks and sediments from the seafloor preserve records of Earth's evolution as well as its heat and material fluxes.
The Ocean Floor Geoscience session covers a broad range of research topics related to the seafloor, including mid-ocean ridge processes, subduction dynamics, arc and intraplate magmatism, crustal movement and structure, and more. All research fields and approaches are welcome. The session aims to encourage discussion among scientists from diverse disciplines and to integrate our understanding of the ocean floor.

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3:30 PM - 3:45 PM

[SCG70-06] Relationship between unconsolidated sand layers identified at IODP EXP346 U1428 and 1429 (west of Kyushu, Danjo Basin) and wavy bedforms on the western slope of the northern Okinawa Trough

*Satoru Haraguchi¹, Keita Saito¹, Yutaro Takaya² (1. Hydrographic and Oceanographic Department, Japan Coast Guard, 2. Graduate school of engineering, the university of Tokyo)

3:45 PM - 4:00 PM

[SCG70-07] Integrated sedimentological and geochemical analysis of event deposits in the outer rise of the Japan Trench

*Yang ZHAO¹, Asuka Yamaguchi¹, Rina Fukuchi², Yosuke Miyairi¹, Yusuke Yokoyama¹ (1. Atomosphere and Ocean Research Institute, The University of Tokyo, 2. Naruto university of Education)

4:00 PM - 4:15 PM

[SCG70-08] Spatiotemporal variations of elemental mass accumulation rates: Implications for REE-rich mud formation in the Cenozoic ocean

Naoto Takada¹, *Kazutaka Yasukawa¹, Kentaro Nakamura^1,2, Yasuhiro Kato^1,2 (1. School of Engineering, The University of Tokyo, 2. ORCeNG, Chiba Institute of Technology)

4:15 PM - 4:30 PM

[SCG70-09] In situ geochemical analysis of lithologic boundary in REE-rich mud from the Minamitorishima EEZ using LA-ICP-MS

*Kodama Rei¹, Yusuke Kuwahara^1,2, Kentaro Nakamura^1,3, Daiki Terauchi¹, Kazutaka Yasukawa¹, Yasuhiro Kato^1,3 (1. School of Engineering, The University of Tokyo, 2. School of Biological and Environmental Sciences, Kwansei Gakuin University, 3. Ocean Resources Research Center for Next Generation, Chiba Institute of Technology)

4:30 PM - 4:45 PM

[SCG70-10] Thermoelectric Conversion in Seafloor Hydrothermal Vents: Insights from Three-Dimensional Analysis of Sulfide Chimneys

*Kentaro Toda¹, Atsushi Okamoto¹, OTGONBAYAR DANDAR¹, Yoshinori Sato¹, Misaki Takahashi, Tomonori Ihara², Tatsuo Nozaki³ (1. Graduate School of Environmental Studies, TOHOKU University, 2. Tokyo University of Marine Science and Technology, 3. Waseda University)

Discussion (4:45 PM - 5:00 PM)

Session information