Abstract：Mass transport deposits(MTDs) are one kind of deepwater sedimentary system driven by gravitation,which widely distributed in the global continental margins.Considering the important academic significance and engineering meaning,MTDs have become a focus of concern by scholars.Based on the multi-beam bathymetric data and high resolution seismic data in Baiyun sag,Pearl river basin,north of South China Sea,we identified large scale MTDs covering over 10,000km2 on the seabed.As Baiyun large scale MTDs with typical structural units,sedimentary and structural features,the research and analysis are of theoretical and applied value.In order to clear further the correlationship between mass transport deposits and the dissociation of gas hydrate,we analysed mechanisms of gas hydrate dissociation and effects on the strength change of submarine sediments.We established geomechanical model and estimated the stability of submarine slope through ultimate equilibrium method.The results show that canyons on the north of Baiyun sag ensure abundant sediment supply while the dissociation of gas hydrate induced the development of MTDs.
王志君. 白云深水区块体搬运沉积体系与水合物分解的相关性研究[J]. 石油地球物理勘探, 2011, 46(增刊1): 144-150.
Wang Zhi-jun. Study of correlationship between mass transport deposits and the dissociation of gas hydrate in Baiyun deepwater area. OGP, 2011, 46(增刊1): 144-150.
