西天山一带大地构造相划分及其构造演化特征

详细信息

CLASSIFICATION OFTECTONIC FACIES AND THEIR EVOLUTIONARY FEATURES IN THE WEST TIANSHAN MOUNTAINS

摘要: 本文以板块构造理论为基础，运用大地构造相溉念及构造分析方法，将西天山及培里木板块北缘一带，划分为８个大地构造相单元，其中包括：柯坪、库车、库鲁克塔格前陆冲褶相，南天山前陆磨拉石盆地相，中天山、南天山岩浆弧相，北天山（弧前）及南天山（弧后）混杂相。并根据该区从震旦纪二叠纪时期沉积相及岩浆岩类型、古生物、岩石化学、同位素年龄、稀土元素等方面的特点的分析，重建了西天山古生代时期的构造演化历史。

Abstract: On the basis of the theory of plate tectonics and by using the concept of tectonic facies andmethod of tectonic analysis,the West Tianshan Mountains and the northern margin of theTarim plate are divided into eight tectonic facies units,i.e. :the Kalpin, Kuqa and Kuruktagforeland thrust-bufacies,South Tianshan foreland molasse basin facies, Central Tianshan andSouth Tianshan magmatic arc facies and North Tianshan（fore-arc）and South Tianshan（back-arc） melange facies. This paper analyzes types of sedimentary facies and magmatic rocks ,pale-ontology,petrochemistry,isotopic ages and REE data of all tectonic facies areas in the Sinian toPermian andthen reconstructs the history of Paleozoic tectonic evolution of the West Tian-shan.