摘要
丽水—椒江凹陷是一个中新生代断陷盆地,断裂构造组成了盆地内的主要构造样式。通过对区域断层剖面组合和平面展布特征的研究,识别出8种类型的断层剖面组合形式,在平面上划分了12个断裂系统区。总体来说本区构造具有东西分带、南北分块的特征,即断裂系统沿北东—南西方向成条带状分布,凹陷南部以地堑式组合为主,北部以地垒式为主。区域断裂系统的演变显示凹陷南北基底基岩存在差异,而且基底发育北西—南东向的断层,从而导致凹陷南部构造活动较北部强。
Lishui-Jiaojiang sag is a Mesozoic-Cenozoic continental margin rift-depression basin, with down-faulted structures. The features of the faults have been analyzed in section and plane. In sec- tions, the faults can be classified into 8 combined styles and in plane the researched area can be divided into/13 fault structure regions. The fault structure styles are characterized by belt zone in E-W and block in S-N. There are differences between the east and the west and between the south and the north in Lishui-Jiaojiang sag. The fault structure style is represented by rift valleys in the south and bursts in the north of the Lishui-Jiaojiang sag. The mechanism of formation is action of extensional pa- leo-stress field with different basement lithofacies and earlier basement faults.
出处
《海洋地质动态》
北大核心
2010年第4期8-12,共5页
Marine Geology Letters
