2:15 PM - 2:30 PM
*Hiroyasu Asahi1, Ken Sawada2, Satoshi Furota3, Keiichi Hayashi4, Yoshihiro Kase4 (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 3.Japan Agency for Marine-Earth Science and Technology, 4.Geological Survey of Hokkaido)