摘要
通过对柴达木盆地柴北缘断裂体系在平面上和剖面上的研究认为，断裂在平面上呈“反S型”状展布，由北向南成排排列，并有向东南方向发散、向西北端收敛的趋势；“反S型”断裂构造带的尾部背斜舒展开阔、头部背斜紧密。剖面上从北向南为一系列逆冲向盆内呈阶梯状成排的逆冲断裂构造带。这些“反S型”断裂构造带多具有扭动特征，与祁连山向南挤压逆冲和阿尔金向东北方向“左旋”走滑有关。而这种规律的出现与走滑应力场影响范围的局限性以及近南北方向主应力作用的广泛性是紧密相关的。利用平面模式图解释了“反S型”断裂构造体系的成因机制及盆地内部断裂走滑运动的原因。
Through the studies of the planar and section fault systems in North Qaidam Basin, the faults are spread in ＂Reverse-s type＂ on the plane, and ranged in line from north to south and moreover, there is a tendency in convergence style in the northwest and divergent style in the southeast of Qaidam Basin ; The anticlines lying in the end of the above form of fault belts range and spread widely, but the ones on the head are rather compact. In the sections, from north to south, a series of thrust fault belts to the inner part of the basin in step form. These types of＇ fault belts are generally characterized by wrench movement that has a certain relation with the southward compres- siona] thrust of Qilianshan Mountains and ＂Turn left＂ to the northeast for the strike and slip of Altyn Tagh Fault. The laws stated above are close correlated with the limitation of the influence of the strike-slip stress field and the u- niversality of the main stress with near SN strike, and furthermore with the help of the planar model map, the gene- sis mechanism of this kind of fault systems and the reasons of the strike-slip motion are interpreted.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第1期18-21,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目（41172122）资助.
