9:15 AM - 9:30 AM
*Keiko HAMANO1, Hajime KAWAHARA1, Yutaka ABE1, Masanori ONISHI2, George HASHIMOTO3 (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Department of Earth and Planetary Sciences, Kobe University, 3.Department of Earth Sciences, Okayama University)