中文摘要：

为进一步深入了解南海地区中生代构造演化过程.本文对南海南北陆缘的中生代地层进行了分析对比,在此基础上挑选了南北陆缘处的两条地震测线07ns-6和97301进行了详细的解释分析.通过地震剖面的解释发现,南海北部和南部（礼乐地块）地震剖面中的中生代地层均显示有褶皱—冲断构造发育.据此推断,研究区在中生代先后经历了洋—陆俯冲活动、陆—陆碰撞造山运动及中生代晚期开始的造山带的塌陷.提出南海地区中生代晚期的＂古双峰—笔架碰撞造山带＂概念.

英文摘要：

In order to research the tectonic evolution of the South China Sea in Mesozoic further more, the authors analyzed and compared the Mesozoic strata between the northern and southern margins of the South China Sea （SCS）. Two seismic lines 97301 and 07ns-6 were selected from the northern and southern margins, they also be explained in detail. By the interpretation of seismic profiles, we found clearly fold-thrust structures developed both in the northern and southern margins of the South China Sea. It was inferred that the study area had experienced ocean- continent subduction, continent-continent collision in the Mesozoic, and sinee the late Mesozoic the orogenic belt began collapsing. The authors described the tectonic evolution in the Mesozoic in the South China Sea and adjacent areas,and proposed the conception of ＂ancient Shuangfeng-Bijia collision orogenic belt ＂ in the late Mesozoic.