%0 Journal Article
%T 祁连山北缘老君庙冲断带构造几何学特征及演化<br>Geometry and Tectonic Evolution of the Laojunmiao Break-Thrust Belt in the Northern Margin of Qilian Mountain
%A 肖毓祥
%A 杜文博
%A 张波
%A 张进江
%A 侯秀林
%A 王巍
%A 何欣
%A 李晓军
%A 阴从元
%J 北京大学学报（自然科学版）
%D 2016
%R 10.13209/j.0479-8023.2016.054
%X 摘要 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。<br>Abstract On the base of the 3D seismic profile interpretations, combined with the previous findings, geometry and tectonic evolution across and along the Laojunmiao break-thrust belt in the northern margin of the Northern Qilian belt are deciphered. The Laojunmiao belt is a bi-layer thrust system, consisting of a trishear faultpropagation fold system in the upper part, wedge-shaped thrust in the lower part. The Laojunmiao thrust system is linked with the NE-SW striking-slip 134 fault in the western segment, which forms a unified system of fracture on the Laojunmiao belt. Thrusting sheet above the hanging wall of the 134-Laojunmiao fault system is folded under nearly E-S compressive stress field, which results in the N-S striking folding to superpose on the Cenozoic bedding.
%K 祁连山北缘冲断带
%K 老君庙背斜
%K 三角剪切型褶皱
%K 冲断
%K 构造楔体
%K 断裂链接&lt
%K br&gt
%K Northern Qilian thrust belt
%K Laojunmiao anticline
%K tri-shearing fold
%K thrust
%K wedge-shaped thrust
%K fault linkage
%U http://xbna.pku.edu.cn/CN/abstract/abstract2998.shtml