甘肃金塔南山构造变形及其地质意义

Tectonic deformation and its implications of Jinta Nanshan,Gansu province

金塔南山构造带是通过多期的左行平移—冲断作用把不同时代、不同性质、形成于不同构造环境的岩石单元会聚而成的构造堆叠体 .研究结果表明金塔南山构造带 (断裂系统 )是在新元古代中期—早古生代早期古洋盆发生汇聚碰撞的基础上形成的 ,早古生代以来的构造变形 (平移—冲断作用 )及其形成过程应与阿尔金走滑断裂系统的动力学过程息息相关 .

The tectonic zone of Jinta Nanshan is a complicated tectonic stack,made by the sinistral wrench-thrusting of several episodes,which is composed of the different rock units formed in different tectonic settings.The results of the studies indicate that the Jinta Nanshan tectonic zone (fault system) was formed on the basis of the convergent collision of the paleo-ocean during mid-late period of Neoproterozoic to early Paleozoic.Based on the studies on the tectonic deformation and its forming processes as well as regional geology,the sinistral wrench-thrusts after Early Paleozoic have been closely related to the dynamic processes of the Altyn Tagh Fault System.That is very important to the understanding of the geodynamics of the paleo-continental margin of the North China plate and the Tarim plate.