辽东湾盆地南部下第三系构造岩相分析

辽东湾盆地由辽西凹陷、辽西低凸起、辽中凹陷、辽东凸起、辽东凹陷五个次级构造单元组成。其下第三系地层包括东上段、东下段、沙一、沙二、沙三与沙四段，发育有九种沉积相、三大沉积体系，根据沉积与构造的配置关系，该区构造岩相带可以划分为五种构造岩相带，如低凸起滨浅湖滩坝型构造岩相带，陡岸半深湖近学水下扇构造岩相带等．构造对沉积的控制规律十分明显，主要表现为不同构造带发育不同的沉积体系，同生断层两侧发育不同的沉积相类型，构造运动的强弱控制沉积体系的发育与分布，不同的构造演化史控制着沉积充填史。受构造岩相双重控制，辽中凹陷的洼中断隆带与坡上断隆带为该区进一步勘探的有利地区。

TECTO-FACIES ANALYSIS OF LOWER SERIES IN THE SOUTHERN PART OF LIAODONG BAY BASIN

Liaodong Gulf Basin consists of five parts. They are Liaoxi depression,liaoxilow uplift, Liaozhong depression, Liaodong uplift, and Liaodong depression. The studiedstrata include the upper and the lower section of Dongying group, the first, the second, thethird,and the forth section of Shahejie group.There developed nine kinds of sedimentaryfacies and three main types of depositional systems.According to the interrelation ofsedimentation and structural belts,five types(seven kinds) of tecto-depositional belts may beconcluded. From those,we have further built up the tecto-depositional belt modul.The effectof structural characteristics on sedimentation is very clear and regular,such as.differentdepositional systems developed on different structural belts, and on different sides of greatgrowth fault. The structural development history controlled the features of the sedimentaryevolution and distribution.