16:15 〜 16:30
*Michael BROADLEY1、Ray BURGESS2、Hidenori KUMAGAI3、Chris BALLENTINE4 (1.Geochemical Research Center, Graduate School of Science, The University of Tokyo、2.SEAES, University of Manchester, M13 9PL, UK、3.JAMSTEC, Kanagawa 237-0061, Japan、4.Department of Earth Sciences, University of Oxford, OX1 3AN, UK)