Susan E Humphris¹, Jerzy Blusztajn², Cornel E J de Ronde³, Tobias Walter Höfig⁴, Yuanfeng Cai⁵, John William Jamieson⁶, Andrew Martin⁶, Tatsuo Nozaki⁷, Agnes G Reyes³, Stephen Roberts⁸, Lucy Schlicht⁹ and Chao Zhang¹⁰, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)WHOI, Department of Marine Geology and Geophysics, Woods Hole, MA, United States, (3)GNS Science, Lower Hutt, New Zealand, (4)Texas A&M University, International Ocean Discovery Program, College Station, TX, United States, (5)State Key Laboratory of Mineral Deposit Research, Nanjing University, Dept of Earth and Engineering, Nanjing, China, (6)Memorial University of Newfoundland, Department of Earth Sciences, St John's, NF, Canada, (7)JAMSTEC, Yokosuka, Japan, (8)University of Southampton, Ocean and Earth Science, National Oceanography Centre, Southampton, United Kingdom, (9)University of Bremen, Department of Geosciences, Bremen, Germany, (10)Leibniz University of Hannover, Hannover, Germany