[S-CG71] [EJ] Ocean Floor Geoscience

Thu. May 25, 2017 10:45 AM - 12:15 PM 201A (International Conference Hall 2F)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Shogo Komori(National Institute of Advanced Industrial Science and Technology), Chairperson:shuhei Totsuka(Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University)

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-convened by K. Tadokoro (Nagoya Univ.), O. Ishizuka (AIST), T. Toki (Univ. Ryukyus), and N. Takahashi (JAMSTEC).

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10:45 AM - 11:00 AM

[SCG71-13] Preliminary results of the CK16-05 Cruise: Scientific drilling in Okinawa Trough of coring, logging using geothermal tool and refit of Long-term monitoring apparatus

*Hidenori Kumagai¹, Jun-ichiro Ishibashi², Tatsuo Nozaki¹, Lena Maeda¹, Yasuhiro Yamada¹, Tomokazu Saruhashi¹, Masanori Kyo¹, CK16-05 On-board Member (1.Japan Agency for Marine-Earth Science and Technology, 2.Kyushu Univ.)

11:00 AM - 11:15 AM

[SCG71-14] Estimation of subseafloor environment at active hydrothermal fields in Okinawa Trough based on mineralogical and geochemical analysis

*Shuhei Totsuka¹, Jun-ichiro Ishibashi², Tatsuo Nozaki³, Kazuhiko Shimada², Jun-Ichi Kimura⁴ (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.Research and Development Center for Submarine Resources, JAMSTEC, 4.Department of Solid Earth Geochemistry, JAMSTEC)

11:15 AM - 11:30 AM

[SCG71-15] Geochemistry of pore fluids collected from active hydrothermal fields in Iheya North Knoll, Okinawa Trough

*Jun-ichiro Ishibashi¹, Saki Tsutsumi¹, Naoya Ebina¹, Tomohiro Toki² (1.Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University, 2.Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus)

11:30 AM - 11:45 AM

[SCG71-16] Relationship between Resistivity Characteristics and Mineral Species of Rock Samples in the Seafloor Hydrothermal Area

*Yusuke Ota¹, Tada-nori Goto¹, Koki Kashiwaya¹, Katsuaki Koike¹, Weiren Lin¹, Osamu Tadai³, Takafumi Kasaya², Toshiya Kanamatsu², Hideaki Machiyama² (1.Graduate School of Engineering, Kyoto University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Marine Works Japan)

11:45 AM - 12:00 PM

[SCG71-17] Electrical features of the submarine hydrothermal system around the Iheya-North Knoll area and the Noho Site, Okinawa, Japan, inferred from resistivity and IP properties of drilling samples from the Chikyu CK16-01 cruise

*Shogo Komori¹, Yuka Masaki², Wataru Tanikawa², Junji Torimoto², Yusuke Ota³, Masato Makio⁴, Lena Maeda², Jun-ichiro Ishibashi⁴, Tatsuo Nozaki², Osamu Tadai⁵, Hidenori Kumagai², CK16-01 on board member (1.National Institute of Advanced Industrial Science and Technology, 2.Japan Agency for Marine-Earth Science and Technology, 3.Kyoto Univerity, 4.Kyushu University, 5. Marine Works Japan)

12:00 PM - 12:15 PM

[SCG71-18] Challenge to monitor the nearby hydrological response to the drilling into hydrothermal venting area: A case for mid-Okinawa Trough Noho hydrothermal site

*Masataka Kinoshita^1,2, Yuka Masaki², Wataru Tanikawa², Yohei Hamada², Tatsuo Nozaki², Hidenori Kumagai², Hiroyuki Yamamoto² (1.Earthquake Research Institute, University of Tokyo, 2.JAMSTEC)

Session information