Thu. Jun 3, 2021 5:15 PM - 6:30 PM Ch.17

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), Kayama Hiromi WATANABE(Japan Agency for Marine-Earth Science and Technology), Akira Ijiri(Japan Agency for Marine-Earth Science and Technology), Tomohiro Toki(Faculty of Science, University of the Ryukyus)

Fluid discharge at mud volcanoes, cold seeps, and hydrothermal vents brings subsurface materials to the Earth's surface. Unique chemosynthesis-based ecosystems are fueled by the substances provided by discharged fluids, and have played a role in the evolution and diversification of life. Knowing fluid geochemistry, driving forces, and geological background of fluid discharge provides key to understand the distribution and evolution of chemosynthetic ecosystems. Multidisciplinary studies from viewpoints of geology, biology, geochemistry, and geophysics are essential to reveal the relationship between fluid discharge and material cycling, environmental changes, and natural hazards, in addition to elucidate spatio-temporal variation of chemosynthesis-based ecosystems. This session welcomes talks and posters focusing on organisms and geological phenomena related to mud volcanoes, cold seeps, hydrothermal vents, and other similar environments. We aim to understand interactions between geosphere, biosphere, and human both on land and in ocean through Earth history.