1. State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China
2. Earth Dynamics Research Group, the Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences Curtin University GPO Box U1987 Australia
3. Tianjin Branch of China National Offshore Oil Corporation Tianjin 300459 China
4. Shenzhen Branch of China National Offshore Oil Corporation Ltd. Shenzhen 518054 China