*Eito Hirai^1,2, Yasuhito Sekine^2,3, Takeshi Tsuji⁴, Osamu Nishizawa, Tomohiro Ohuchi⁵, Yuji Higo⁶ (1.Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology, 2.Earth–Life Science Institute (ELSI), Tokyo Institute of Technology, 3.Institute of Nature and Environmental Technology, Kanazawa University, 4.Department of Systems Innovation, the University of Tokyo, 5.Geodynamics Research Center, Ehime University, 6.Japan Synchrotron Radiation Research Institute)