Zhaoxia Jiang¹, Liu Qingsong², Andrew P Roberts³, Vidal Barrón⁴, José Torrent⁴ and Qiang Zhang⁵, (1)Ocean University of China, Qingdao, China, (2)inst. of geology & geophysics, Beijing, China, (3)The Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)Departamento de Agronomía, Universidad de Córdoba, Edificio C4, Campus de Rabanales, Córdoba, Spain, (5)State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China