11:00 AM - 11:15 AM
*Keiko KOSHIDA1, Akira ISHIKAWA2, Katsuhiko SUZUKI3, Tsuyoshi KOMIYA2 (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, University of Tokyo, 3.Japan Agency for Marine-Earth Science and Technology)