*Jun-Ichi Kimura¹、James B Gill²、Peter E van Keken³、Hiroshi Kawabata⁴、Susanne Skora⁵ (1.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Scienc and Technology、2.Department of Earth and Planetary Sciences, University of California Santa Cruz、3.Department of Terrestrial Magnetism, Carnegie Institution for Science、4.Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University、5.Institute of Geochemistry and Petrology, Earth Sciences, ETH Zürich)

*Peter E Van Keken¹ (1.Carnegie Institution for Science Washington)