Wei Li, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China, Chuan-Zhou Liu, Institute of Geology and Geophysics, Chinese Academy of Sciences, State Key Laboratory of Lithospheric Evolution, Beijing, China, Chunhui Tao, Second Institute of Oceanography, MNR, China, Hangzhou, China and Zhenmin Jin, China University of Geosciences Wuhan, Wuhan, China