Japan Geoscience Union Meeting 2022

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[J] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS24] Biogeosciences of cold seeps, mud volcanoes, and hydrothermal vents

Wed. Jun 1, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (32) (Ch.32)

convener:Yusuke Miyajima(Geomicrobiology Research Group, Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), convener:Akira Ijiri(Kobe University), Tomohiro Toki(Faculty of Science, University of the Ryukyus), convener:Robert Jenkins(School of Geosciences and Civil Engineering, College of Science and Engineering, Kanazawa University), Chairperson:Yusuke Miyajima(Geomicrobiology Research Group, Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Akira Ijiri(Kobe University)

Fluid discharge at cold seeps, mud volcanoes, and hydrothermal vents brings subsurface materials such as methane to the Earth's surface. Unique chemosynthesis-based ecosystems are fueled by the substances provided by the discharged fluids. Knowing the origin of discharged fluids, driving force and geological background of the fluid discharge phenomena are essential to reveal the material cycling in the Earth's interior and the relationship between fluid discharge and environmental changes and natural hazards. Ecology, phylogeny, and fossil records of fluid-dependent organisms provide key to reveal not only the evolution of chemosynthetic organisms but also the interaction between life and Earth. In this session, we welcome topics focusing on geological phenomena and organisms related to cold seeps, mud volcanoes, and hydrothermal vents from a cross-disciplinary perspective of geology, biology, chemistry, and physics. We aim to understand the interaction between geosphere and biosphere both on land and in ocean through Earth history. Talks and discussions in this session will be held in Japanese, though presentation slides and posters may be prepared in English.

11:00 AM - 1:00 PM

[MIS24-P01] Geochemical characteristics of shallow gas hydrates and sediment pore waters obtained from 2021 drilling survey at a knoll off Sakata in the eastern margin of the Japan Sea

*Yusuke Miyajima1, Yuki Ota2, Shinsuke Aoki1, Masanori Kaneko1, Hideyoshi Yoshioka1, Hiroshi A Takahashi3, REO IKAWA1, Isao Machida1, Manabu Tanahashi1, Kiyofumi Suzuki4, Mikio Satoh1 (1.Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 2.Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 3.Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 4.Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology (AIST))

11:00 AM - 1:00 PM

[MIS24-P02] Drilling of Mud Volcano in Hyuga-nada: The destination of Seismogenic fluid with Linkage between the activites and subduction dynamics

*Rina Fukuchi1, Miho Asada2, Kiichiro Kawamura3, Mikiya Yamashita2, Yusuke Yamashita4, Masao IWAI5, Akira Ijiri6, Tomohiro Toki7 (1.Naruto university of Education, 2.National Institute of Advanced Industrial Science and Technology, 3.Yamaguchi University, 4.Kyoto University, 5.Kochi University, 6.Kobe University, 7.University of the Ryukyus)

11:00 AM - 1:00 PM

[MIS24-P03] Microbial communities in submarine mud volcanoes: their origin and interaction with the microbial communities of the overlysing seawater

*Tatsuhiko Hoshino1, Tomohiro Toki2, Takuroh Noguchi3, Juichiro Ashi4, Masafumi MURAYAMA3, Akira Ijiri5 (1.Japan Agency for Marine-Earth Science and Technology, 2.Faculty of Science, University of the Ryukyus, 3.Research and Education Faculty, Kochi University, 4.Atmosphere and Ocean Research Institute, The University of Tokyo, 5.Graduate School of Maritime Sciences, Kobe University)

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