南天山东段榆树沟—铜花山巨型构造混杂带的发现及意义  

Discovery of Tectonic Melange Belt in the Yushugou-TonghuashanArea and Its Significance

作　　者：陆关祥[1] 周鼎武[2] 王居里[2] 张成立[2] 

机构地区：[1]北京师范大学环境科学系,100875 [2]西北大学地质系,陕西西安710069

出　　处：《地质论评》2004年第2期120-124,i003,i004,共7页Geological Review

基　　金：国家自然科学基金(编号 49972075);国家重点基础研究发展规划项目(编号 2001CD409801)的成果

摘　　要：通过遥感构造综合解析,认为南天山东段榆树沟—铜花山地区为一巨型构造混杂带。该构造带可划分为南部和北部的两带变质褶皱地层系统、中带的构造混杂系统和不同期次的岩浆侵入体。结合同位素定年和岩浆侵入的综合对比与研究,认为该地区先后经历了五期构造运动,分别为:① 南北向逆冲推覆,② 北西西向左行走滑,③ 北西西向右行走滑,④ 南北向逆冲推覆,⑤ 北北西、北东向断裂。The Yushugou-Tonghuashan area is a typical example of complex structure in orogenic belt. There are varieties of geological mass formed in different high-levels and they undergone different metamorphisms. Based on a comprehensive remote sensing structural analysis, the whole district can be subdivided into three structural belts, namely southern and northern metamorphic fold stratigraphic system, central tectonic mixed system and multi-stage intrusives. Isotopic dating of metamorphics and comparative analysis of rock types, tectonic block types and the characteristics of deformation further indicate that this area experienced five tectonic stages: (1) N-S overthrusting; (2) WNW-ESE trending sinistral strike-slipping; (3) WNW-ESE trending dextral strike-slipping; (4)N-S overthrusting; and (5) NNW and NE late-stage faulting.

关 键 词：构造混杂带 造山带 遥感解析 构造解析 天山 构造运动 

分 类 号：P542.2[天文地球—构造地质学]