中文摘要：

大兴断层是位于渤海湾盆地冀中坳陷西北部的廊固凹陷的边界大断层,控制着整个凹陷的沉积和构造演化。根据大兴断层的走向特征,将研究区内的大兴断层分为东北段、中段、西南段3段,并对其结合处成因进行了探讨。文中首次将大兴断层断面以三维立体形态展示出来,并对大兴断面的三维几何形态进行了详细的剖析。认为大兴断面是个由多个倾斜面组成的曲面,每个相邻的倾斜面通过轴面而分隔。轴面通过其走向特征,分为横向轴面与垂向轴面,其中横向轴面为平行断层走向的轴面,而垂向轴面则是垂直断层走向的轴面。通过4个横向轴面与2个垂直轴面将大兴断面分为10个区,每个区都有各自的形态与特征。对大兴断层的活动机制进行了探讨,认为大兴断层初期是以多米诺式运动模式为主,后期在翘倾作用下发生旋转,从而形成上陡下缓的犁式断层。其上盘地层的运动模式则是初期与断层同时发生旋转,地层陡且直,在上陡下缓的断面形成后,以斜剪切模式运动,形成滚动背斜。

英文摘要：

Daxing Fault is a boundary fault of Langgu Depression which is located in the northwest of Jizhong Depression in Bohaiwan Gulf Basin.It controls the sediment and structural evolution of the whole depression.According to the strike direction,Daxing Fault is divided into three segments which are northeastern segment,middle segment,and southwester segment,and the origin of their linkages has been discussed.This paper shows the triaxial geometric graph of Daxing Fault plane for the first time,and analyzes it.We consider that Daxing Fault plane is a surface which consists of several inclined planes separated by axial planes.According to the strike direction,axial planes are divided into two types,a transversal axial plane whose strike direction is parallel to the fault strike and a vertical axial plane whose strike direction is vertical to the fault strike.Daxing Fault plane is divided into 10 zones by 4 transversal axial planes and 2 vertical axial planes,and each zone has its own configuration and feature.We also have discussed the mechanism of Daxing Fault movement,and consider that Daxing Fault movement in a domino normal pattern at first,and then the fault rotated to form the fault that was flattened from top to bottom.The stratum of the hanging wall rotated with fault at first,and then moved in an inclined shear pattern to form a rollover anticline when the fault was flattened from top to bottom.