通过对东海盆地丽水-椒江凹陷构造特征及其演化历史的分析,认为该凹陷基本构造特征为\"南北分区,东西分带\",并具有典型的东断西超的半地堑式的构造特征。凹陷经历了多期的构造活动,使得研究区内断裂非常发育,期间多次的抬升剥蚀,造成了多个构造层系之间的区域性不整合,并形成了多种类型的构造圈闭。其形成演化过程可分为裂谷盆地、断陷、坳陷和区域沉降4个阶段:早期在太平洋板块、欧亚板块和库拉板块的联合作用下,产生了凹陷的雏形――裂谷盆地;后期由于太平洋板块的持续俯冲所产生的弧后拉张效应,将凹陷改造成了断陷型盆地;始新世时太平洋板块的俯冲方向发生改变,形成坳陷;上新世时凹陷处于平稳补偿沉积状态,但随后多次的区域隆升,使部分先期沉积的地层遭受剥蚀,形成了区域性的不整合面。同时凹陷内主要断裂的长期活动控制了烃源岩的发育与分布,促进了油气的垂向运移,并且对油气的聚集也有一定的影响。

The research on tectonics evolution and petroleum geology of Lishui-Jiaojiang sag in the East China Sea shelf basin shows that Lishui-Jiaojiang sag could be divided to be south area and north area by second-order transfer zones from south to north, and four belt s could be seen clearly from west to east. The central area is typical sag with fault in the east and overlap in the west. Affected by repetitious tectonic events, a mass of faults and kinds of structural trap emerged. The periods of tectonic.