ACKNOWLEDGEMENTS

The authors would like to thank Key Lab of Marine Geology，Tongji University，Shanghai，for allowing use of seismic data provide by Hamburg University and logging data provided by Lamont-Doherty Earth Observatory.The research was funded by the National Natural Science Foundation of China through grant 49904007，the Foundation of Key Lab of Submarine Geosciences，SOA through grant 9905and CAS foundation of national-wide excellent Ph.D.Dissertations.The authors would like to thank Professors Liu Guangding，Wang Pingxian，Wu Bihao，Drs.Li Qingmou and Lu Zhengquan for their help.(https://www.daowen.com)