*Alexander NICHOLS¹、Yoshihiko TAMURA¹、Cathy BUSBY²、Peter BLUM³、Martin JUTZELER⁴、Julie SCHINDLBECK⁵、Iona MCINTOSH¹、Expedition 350 scientists IODP⁶ (1.JAMSTEC, Yokosuka, Japan、2.Department of Earth and Planetary Sciences, UC Davis, USA、3.IODP, Texas A&M University, USA、4.National Oceanography Centre, Southampton, UK、5.GEOMAR, Helmholtz Centre for Ocean Research, Kiel, Germany、6.n/a)