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基于老君庙构造带三维地震资料,结合以往研究成果,分析祁连山北缘西段老君庙带的构造几何特征及构造演化。得到以下认识:老君庙冲断带具有双层结构,包括浅部的三角剪切型褶皱?冲断构造以及冲断带层下盘隐伏的逆冲构造楔体;该冲断带自东向西与北东?南西走向的134断裂链接,形成统一的“134?老君庙弯曲断裂”体系,其后缘为134走滑兼逆冲性质的调节断裂,前锋为庙北三角剪切型褶皱?冲断系;“134?老君庙?青头山”断裂围限的上盘逆冲岩片向前陆方向扩张,导致平行冲断带近东西向的挤压调节变形,引起浅部新生代地层发生近南北走向的褶皱变形。
Based on the 3D seismic data of Laojunmiao tectonic belt and the previous research results, the tectonic evolution and tectonic evolution of the Laojunmiao belt in the western segment of the northern margin of the Qilian Mountains are analyzed. The following conclusions can be obtained: The Laojunmiao thrust belt has a double-layered structure, including a shallow triangular shear fold and thrust structure and a hidden thrust structure wedge in the lower part of the thrust belt. West and North-East-Southwest strike 134 fault link, forming a unified “134 Laojunmiao bending fracture ” system, the trailing edge of the 134 slip and thrust nature of the regulatory fracture forward for the Miaobei Triangle shear Type folds and thrusts, and the upper plate thrust faults of the “Laojun Temple and the” Green Mountain “of the” Ruotou Mountain "of the Laojun Miao dilate in the direction of the foreland, resulting in the nearly east-west compression parallel deformation of the thrust belt, causing Shallow Cenozoic strata occur near the north-south fold deformation.