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