*Maria Luisa Tejada^1,2、Jörg Geldmacher³、Folkmar Hauff³、Daniel Heaton⁴、Anthony AP Koppers⁴、Dieter Garbe-Schönberg⁵、Kaj Hoernle^3,5、Ken Heydolph³、William W Sager⁶ (1.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan、2.Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan、3.GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel, Wischhofstr. 1-3, D-24148 Kiel, Germany、4.College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, 97331 USA、5.Institute of Geosciences, University of Kiel, Germany、6.Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204 USA)