Yuqing Liu
China University of Petroleum, China
Title: The differences among the structures of continental marginal basins in the South China Sea
Biography
Biography: Yuqing Liu
Abstract
The basins developed quite differently in the SCS, which was due to the complicated dynamic background. Based on the interpretion of high-accuracy seismic data, different structures of four basins from different continental margins were analyzed. The results showed that the faults in Yinggehai basin were mainly strike-slip, extensional strike-slip as well as extensional faults, and the evolution of the basin could be divided into three stages, including strike-slip extensional rifting stage, extensional strike-slip rifting stage and the stage of subsidence; two types of faults were formed in Pearl River Mouth Basin, including extensional and strike-slip extensional faults, and the basin experienced three stages, which were rifting, subsidence and tectonic activation; there were mainly extensional faults in Reed Basin, and the evolution could also be divided into three stages which were rifting, drifting and subsidence; both extensional faults and compression faults occurred in Taixinan Basin, and the evolution stages of the basin were rifting, compression inversion and subsidence. Combined with peripheral dynamic events in that period, the mechanism of the above differences of the basins in response to dynamic background was under discussion，which showed that plate interaction, deep mantle activities and large strike-slip faults were three key factors affecting basin development in different degree. This study can support the further geological researches on basins in the South China Sea and guide the exploration in oil and gas in this area.