双逆冲断层间的构造样式——以柴达木盆地跃进二号—跃东地区为例

A study of structure styles between double thrust faults——taking the area between Yuejin-2 and Yuedong thrust faults in the Qaidam Basin as an example

王信国 王濮 何建坤 李东安

Wang Xinguo Wang Pu He Jiankun Li Dongan

单逆冲断裂带两侧的构造样式已经有了充分的研究,但双逆冲断层间的构造样式却少有详细的论述。基于实际三维地震资料解释和有限元应力场模拟,通过对三维断层组合和有限元模型应力、应变分布特征分析,发现双逆冲断层间存在近直立走滑断层,且走滑断层两侧地层产状相反。这对研究复杂构造交汇部位的构造样式和矿产资源勘查有指导意义。

The structure styles on both sides of a single thrust fault have been thoroughly probed.Nevertheless,detailed investigation into that between double thrust faults is still rare.Based on 3-D seismic data interpretation and stress field simulation with finite element,the paper analyzes the 3-D fault combination and the distribution features of stress and strain of the finite element simulation,recognize the existence of nearly vertical strike-slip faults with opposite occurrence of formations at their two sides.The study may be used to guide the research of structure style of complicate structural intersections as well as mineral resource exploration.

10.11743/ogg20100118