2:05 PM - 2:20 PM
*Takeshi Hanyu1, Junji Yamamoto2, Katsunori Kimoto3, Yuriko Nakamura3, Kenji Shimizu4, Takayuki Ushikubo4 (1.Japan Agency for Marine-Earth Science and Technology, Department of Solid Earth Geochemistry, 2.The Hokkaido University Museum, 3.Japan Agency for Marine-Earth Science and Technology, Research and Development Center for Global Change, 4.Japan Agency for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research)