从地质—地球物理特征探讨甘肃西部扭压张构造变形

在地球物理场信息三维空间分析基础上,以走滑断裂尾端效应模式为指导,探讨了三危山、阿尔金左行走滑断裂产生尾端效应,在断裂东北端拉张凹陷,东南端挤压隆起,具备压、张、扭构造变形,同时认为不存在沿水系展布遥感解译的疏勒河断裂。

Geological and Geophysical Characteristics of Tensional Compressive Deformations in Western Gansu

Western Gansu is the junction of the several big blocks. Affected by the Altun left strike-slip fault, it has strong tectonic activities and complex deformation, especially western Hexi corridor region which Shule river flow and the surrounding, the surface wide quaternary cover, and geological observation is difficult. Therefore, there are large gaps in cognition of geological structure in this area. Based on the geophysical field information 3D spatial analysis, guided by the strike-slip fracture end effect model, the text discusses the Sanweishan, Altun left strike-slip fault end effect. It extensional sags in the northeast of fracture end, the southeast extrusion swells, and has compressional, tensional and transpressional tectonic deformation. At the same time, it thinks that it does not exist Shule river fracture which along the stream distribution and remote sensing interpretation.