沾车凹陷新生代盆地基底构造演化的物理模拟

为了弄清沾车凹陷的构造特征及演化过程,根据边界几何特征结合其动力学条件对其进行了一系列的平面构造物理模拟实验,结果表明:①沾车凹陷在新生界时期的运动方式以伸展为主,伸展方向为SN向;②不同走向的正断层是在同一伸展过程中形成的,曲折边界主断层主导了其内部次级构造的分布与产状,偶尔出现的逆断层是在伸展情况下形成的;③断阶带潜山多形成于主断层的内凹区,一般产生在主断层走向与伸展方向斜交地带,斜坡带上在外凸区易于残留而成潜山.

Physical simulation of the structural evolution of the Cenozoic basin basement in Zhan-Che Sag

In order to understand the structural features and the evolution process of Zhan - Che Sag, a series of physical simulation experiments of it are carried out according to its boundary geometrical features and dynamic conditions. The experimental results are shpwn: (1) the extensional movement in SN direction is the primary movement of Zhan - Che Sag in Cenozoic; (2) the normal faults in different directions were formed in the same extension process, the major fault with tortuous boundary controls the distribution and the attitude of the substructures in Zhan - Che Sag, and a few of inverse faults were also formed in the extension process; (3) the buried hills are formed mainly in the faulted zones in the concave side of the main fault where the main fault direction intersects with the extensional direction, and some buried hills are also formed in the slopes in the convex side of the main fault.