[S-CG66] Ocean Floor Geoscience

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo)

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 structure and dynamics, and also related to Earth's environments through the hydrosphere and atmosphere. Seafloor rocks and sediments record Earth's evolution and heat and 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 magmatism, 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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[SCG66-P01] Relationship between the oblique opening system in the back-arc basin and Hamilton's principle

*Takao Eguchi

[SCG66-P02] A sand-box experiment for understanding marine self-potential anomalies

*Yoshifumi Kawada^1,2, Takafumi Kasaya² (1.International Research Institute of Disaster Science, Tohoku University, 2.Japan Agency for Marine-Earth Science and Technology)

[SCG66-P03] Sandbox analogue experiments to examine how syntectonic sedimentation influence on forearc basin stratigraphy and accretionary wedge growth

*Atsushi Noda¹, Hiroaki Koge¹, Yasuhiro Yamada^2,3,4, Ayumu Miyakawa¹, Juichiro Ashi⁵ (1.National Institute of Advanced Industrial Science and Technology, 2.Japan Agency for Marine-Earth Science and Technology, 3.Faculty of Science and Technology, Kochi University, 4.Department of Earth Sciences, Royal Holloway University of London, 5.Atmosphere and Ocean Research Institute, The University of Tokyo)

[SCG66-P04] Geophysics in the R/V Hakuho-maru 2019-2020 expeditions around the world, 30^th anniversary

*Masakazu Fujii^1,2, Hiroaki Koge³, Hiroshi Sato⁴, Kyoko Okino⁵, Chiori Tamura⁵, ZHOU JINYU⁵, Kosuke Inoue⁵ (1.National Institute of Polar Research, 2.The Graduate University for Advanced Studies, SOKENDAI , 3.AIST, 4.Senshu University, 5.Atmosphere and Ocean Research Institute, UTokyo)

[SCG66-P05] How fracture zones work on subducting lithosphere?

*Nobukazu Seama^1,2, Tomoeki Nakakuki³ (1.Department of Planetology, Graduate School of Science, Kobe University, 2.Kobe Ocean Bottom Exploration Center, Kobe University, 3.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University)

[SCG66-P06] Topographic features of rift zones of the seamounts on the Pacific Plate

*Megumi Fujimoto¹, Masao Nakanishi² (1.Graduate School of Science and Engineering, Chiba University , 2.Department of Earth Sciences Graduate School of Science, Chiba University)

[SCG66-P07] Dredge cruise on petit-spot volcanoes and IODP drilling earth science -Great discovery : explosion crater (Maar) in the abyssal plane, off Tohoku-

*Teruaki Ishii¹, Makoto Kaneko², Naoto Hirano³, Shiki Machida⁴, Asako Matsumoto⁴, Norikatsu Akizawa⁵, Yuki Sato³, Taku Yutani⁶, Keishiro Azami⁵, Yuki Katsuragi³, Shunta Sakai ³, Yukihiko Nakano⁷, Takuya Matsuzaki⁸ (1.Center for Integrated Research and Education of Natural Hazards, Sizuoka University, 2.Fukada Geological Institute, 3.Tohoku University, 4.Chiba Institute of Technology, 5.The University of Tokyo, 6.Tohoku University,University of Bayreuth (Germany), 7.Nippon Marine Enterprises, LTD, 8.Kochi University)

Cancelled

[SCG66-P08] Geological structure around Offshore Yonaguni-Jima Island

*Ayanori Misawa¹, Hiroaki Koge¹, Taichi Sato¹, Saki Ishino¹, Yoshiaki Suzuki¹, Jih-Hsin Chang¹, Kohsaku Arai¹, Takahiko Inoue¹ (1.Geological Survey of Japan, AIST)

[SCG66-P09] Geophysical analysis of the Yonaguni, Irabu and Tarama knolls

*ZHOU JINYU¹, Kyoko Okino¹, Masakazu Fujii² (1. Atmosphere and Ocean Research Institute, The University of Tokyo, 2.National Institute of Polar Research)

[SCG66-P10] Reflection seismic survey data around ring structures of the submarine Kikai Caldera, south offshore Kyushu, Japan

*Jih-Hsin Chang¹, Takahiko Inoue¹, Ayanori Misawa¹, Kohsaku Arai¹ (1.Geological Survey of Japan, National Institute of Advanced Industrial and Science Technology.)

[SCG66-P11] Pore fluid chemistry at a small pockmark with liquid CO₂ venting within an active hydrothermal field in the Okinawa Trough

Shunta Ueno¹, Akihi Tsutsumi¹, Akiko Makabe², Shinsuke Kawagucci², Masahiro Yamamoto², *Jun-ichiro Ishibashi¹ (1.Department of Earth and Planetary Sciences, School of Science, Kyushu University, 2.Japan Agency for Marine-Earth Science and Technology)

[SCG66-P12] Precipitation environment and preservation mechanism in formation of iron hydroxide in Satsuma Iwo-jima, Kagoshima, Japan.

*Koki Hori¹, Shoichi Kiyokawa² (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University, 2.Kyushu University Earth and Planetary Science)

Cancelled

[SCG66-P13] Secular change of sediment composition and its origin after 3.11 Great East Japan Earthquake in Onagawa Bay, Miyagi Prefecture

*Tomoaki Wakayama¹, Izumi Sakamoto¹, Yuka Yokoyama¹, Toyonobu Hujii², Akihiro Kijima² (1.Tokai University, 2.Tohoku University)

[SCG66-P14] Developing efficient methods to collect and observe microfossils of fish teeth (ichthyoliths) from pelagic clay for determining depositional ages of pelagic clay

*Kazuhide Mimura¹, Shugo Minabe¹, Junichiro Ohta^1,2,3, Kentaro Nakamura¹, Kazutaka Yasukawa^1,2, Koichiro Fujinaga^2,1, Kazuhiro Takao¹, Yasuhiro Kato^1,2 (1.Department of Systems Innovation, School of Engineering, the University of Tokyo, 2.ORCeNG, Chiba Institute of Technology, 3.JAMSTEC)

[SCG66-P15] Chemostratigraphy of ferromanganese crusts based on Independent Component Analysis

*Keishiro Azami¹, Qing Chang², Jun-Ichi Kimura², Kazutaka Yasukawa^1,3, Kentaro Nakamura¹, Yasuhiro Kato^1,3 (1.Department of System Innovation, Graduate School of Engineering, The University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Chiba Institute of Technology)

[SCG66-P16] Buoy-mounted system for continuous and real-time seafloor crustal deformation measurements

*Keiichi Tadokoro¹, Natsuki Kinugasa¹, Teruyuki Kato², Yukihiro Terada³, Kenjiro Matsuhiro⁴ (1.Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University, 2.Hot Springs Research Institute of Kanagawa Prefectural Government, 3.National Institute of Technology, Kochi College, 4.Technical Center, Nagoya University)

[SCG66-P17] Evaluation of the effects of seafloor station array size on the accuracy of GNSS-A observation using synthetic data

*Yuto Nakamura¹, Yusuke Yokota², Tadashi Ishikawa¹, Shun-ichi Watanabe¹ (1.Hydrographic and Oceanographic Department, Japan Coast Guard, 2.Institute of Industrial Science, University of Tokyo)

[SCG66-P18] High-resolution bathymetry and efficient geological survey using submersible SHINKAI 6500 equipped with MBES and SBP in the petit-spot volcanic fields around Minamitorishima Island.

*Junji Kaneko¹, Shiki Machida² (1.Japan Agency for Marine-Earth Science and Technology, 2.Chiba Institute of Technology)

[SCG66-P19] An efficient method for high-res deep ocean mapping newly developed in the international unmanned survey competition

*MASANAO SUMIYOSHI¹ (1.Hydrographic and Oceanographic Department, Japan Coast Guard)

[SCG66-P20] Recovery operation of "anchor-recovery type OBSs" – KR19-06C cruise of R/V Kairei, off Yamagata, Japan Sea

*Ryo Miura¹, Tetsuo No¹, Shuichi Kodaira¹, Takuya Maekawa², Ikumasa Terada², Hidenori Shibata², Keiji Okabe³ (1.Japan Agency for Marine-Earth Science and Technology, 2.Nippon Marine Enterprises, Ltd., 3.Mitsuya, Ltd.)

Session information

[S-CG66] Ocean Floor Geoscience