1. State Key Laboratory for Mineral Deposits Research and Department of Earth Sciences Nanjing University Nanjing China
2. School of Marine Sciences Sun Yet‐Sen University Guangzhou China
3. Natural Magnetism Group, Department of Earth Science and Engineering Imperial College London London UK
4. Research Institute of Petroleum Exploration and Development, PetroChina Beijing China
5. Department of Geology and Geophysics Yale University New Haven CT USA
6. College of Oceanography Hohai University Nanjing China