5:15 PM - 6:45 PM
*Tomoaki Koya1, Daisuke Araoka2, Hideko Takayanagi1, Akizumi Ishida1, Yumiko Watanabe1, Takeshi Kakegawa1 (1.Department of Earth science, Graduate school of science, Tohoku University, 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)