Segment Activity of Xi’nanzhuang Fault in Nanpu Sag and Its Controlling on Sedimentary Process
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摘要: 应用古落差方法进行南堡凹陷西南庄断层分段活动性的研究,并以此为基础对沉积的控制作用进行研究。西南庄断层可划分为3段，东段最先发育，西段和中段在中晚期强烈活动。其中，西段控制着南堡⑤号构造带的发育，由于强烈活动形成了其滚动背斜的构造样式；而中段和东段的连接部位正是老爷庙构造带的发育部位。正是由于两翼的强烈沉降，使老爷庙构造带形成了长轴垂直于西南庄断层的横向背斜。南堡⑤号构造带的物源主要是从断裂西段的倾没端沿断裂下降盘的沟槽进入西段控制的中心部位；老爷庙构造带对应着东段和中段的连接部位，是继承性发育的物源入口，沉积体系进入盆地后沿背斜枢纽部位向盆地中心运移。
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关键词:
- 南堡凹陷西南庄断层分段活动性横向褶皱背斜
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 Nanpu5 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 Nanpu5 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.-
Key words:
- Nanpu sag
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