• 责任者：Zhang Jianpei (CNOOC ; Shanghai 200030 ; China)
• 刊名：Chinese Journal of Geology
• 出版年：2013
• 卷期：48(1)
• 关键词：断裂带 ; fracture zones ; 西湖凹陷 ; Xihu Sag
• 页码：p.291-303
• 图表：illus., 27 refs.
• 分类号：0300
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

By comprehensively using the results of seismic profile interpretation and structural diagrams, this paper classified the fault system by its development scales and stages in the Pinghu slope of the Xihu Sag in the East China Sea Shelf Basin, analyzing its lateral and vertical distribution characteristics. By using the method of fault throw and fault activity ratio, its kinematics are discussed, including its genetic mechanism combined with the regional stress field. The results show that the fault system in the Pinghu slope can be divided into four fault zones,including the Kongqueting synthetic fault zone, the Wuyunting antithetic fault zone, the Pinghu synthetic fault zone and the Pingnan graben-type fault zone from north to south. The Pinghu slope mainly developed under extension, such as domino-style, graben, comb, positive drag structures and others. While,weak inversional structure was only displayed in local scale, for example in the Pinghu synthetic fault zone. The fault kinematics showed that the peak period of fault activity had clear zonality. The strength of fault activity in the Pinghu synthetic fault zone was the most, the those of Kongquetin synthetic fault zone and the Wuyunting antithetie fault zone took the second place,while that of the Pingnan graben-type fault zone was the least. The occurrence and development of the fault system in the Pinghu slope was the result of stress concentration and the interaction between different faults, and was a local response to the tectonic evolution of the East China Sea Shelf Basin.