Segment Activity of Xi’nanzhuang Fault in Nanpu Sag and Its Controlling on Sedimentary Process

Key words: 
• Nanpu sag

Abstract: Segment activity of Xi'nanzhuang fault in Nanpu Sag was studied by using fault fall. On the base of this, controlling of fault on sedimentary Process was researched. Xi'nanzhuang fault was divided into three parts, the eastern part was developed firstly, the western part and the middle part was strongly activated at the middle and later period. Furthermore, the western part controlled development of Nanpu5 tectonic belt, rollover anticline was formed in there; While linkage of the middle and eastern part was the developed part of Laoyemiao tectonic belt, it was a transverse fold of which axis was vertical to Xi'nanzhuang fault. It was formed for bilateral strong subsidence. Sedimentary source of Nanpu5 tectonic belt came from pitching end of the western part into the center of western part along down wall; Laoyemiao tectonic belt was correlated with inherited sedimentary source entrance, depositional systems entered the center of sag along hinge of transverse fold.