南海曾母盆地新生代晚期构造沉降分析

Analyses of Late Cenozoic Tectonic Subsidence of Zengmu Basin in South China Sea

曾母盆地是一个ＮＷ向走滑型沉积盆地，新生代晚期经历了强烈沉降（Ｅ３－Ｎ１１）、平缓沉降（Ｎ１２－Ｎ１３）、加速沉降（Ｎ２）和差异升降（Ｑ）四个时期，其构造演化主要取决于加里曼丹与南沙两地块间的相互作用所引起的ＮＷ向断裂的活动方式．

Zengmu Basin is a NW strike-slip deposit basin In the late Cenogoic Era. it underwent four periods such as strong subsidence (E3-N), weak subsidence (N - N ), accelerated subsidence (N2),and up-and-down fault-bloCk movement(Q). The tectonic evolution of the basin is mainly controled by the ways of the activties of NW strike faults,which are caused by the interaction between the two tectonic units,ie,Kalimantun and Nansha.