*Tatsuji Nishizawa1, Hitomi Nakamura2,3,4,5, Tatiana Churikova6,7, Boris Gordeychik6,8, Maria Pevzner9, Osamu Ishizuka2,10, Hikaru Iwamori3,4,11
(1.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, 2.Institute of Earthquake and Volcano Geology, Geological Survey of Japan, AIST, 3.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology, 4.Depeartment of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology, 5.ORCeNG, Chiba Institute of Technology, 6.GZG, Abt. Geochemie, Universität Göttingen, 7.Institute of Volcanology and Seismology, Far East Branch, Russian Academy of Sciences, 8.Institute of Experimental Mineralogy, Russian Academy of Sciences, 9.Geological Institute, Russian Academy of Sciences, 10.R & D Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology, 11.Earthquake Research Institute, The University of Tokyo)