*Natsue Abe^1,2, Keishi Okazaki³, Kohei Hatakeyama⁴, Yuya Akamatsu⁴, Ikuo Katayama⁴, Benoit Ildefonse⁵, Katsuyoshi Michibayashi⁶, Eiichi TAKAZAWA⁷, Damon A H Teagle⁸, Peter B Kelemen⁹, Science Party The Oman Drilling Project (1.Mantle Drilling Promotion Office, MarE3, Japan Agency for Marine-Earth Science and Technology , 2.Graduate School of Natural Science & Technology, Kanazawa University, 3.KCC, X-star, Japan Agency for Marine-Earth Science and Technology , 4.Hiroshima University, 5.University of Montpellier, 6.Nagoya University, 7.Niigata University, 8.University of Southampton, 9.LDEO, Columbia University)