阿尔金盆地群构造类型与演化

阿尔金走滑断裂带主要由阿尔金主干断层与几条近于平行的左行走滑断层和斜交断层组成,其空间分布规律可用左行走滑简单剪切模型解释。

Structural Style and Tectonic Evolution of the Basins in the Altun Region

The Altun fault, a famous tremendous sinistral strike-slip fault in NW China, is composed mainly of the Altun,master fault several secondary subhorizontal, sinistral, strike-slip faults and oblique faults. The relationship between master and secondary structures may be explained by a simple shear model based on the concept of "Riedel flaking". There are several basins in the Altun region. The Xorkol basin is one of the typical Cenozoic strike-slip pull-apart basins related to strike-slip faulting in the Altun region. Other basins, such as the Tula Basin and Dunhuang Basin, were Jurassic half graben-like extensiotial basins, and now are transpressional basins resulting from reworking of the strike-slip of the Altun fault. On the basis of a petroleum geological analyses, this paper proposes that the Tula basin and Dunhuang basin (especially in the Aksay depression ) are favorable for hydrocarbon exploration.