黔东地区典型构造样式特征及其地质意义

黔东地区发育中、新元古代至新生代地层和多种类型的岩浆岩、变质岩, 存在多期次构造运动, 主要可划分为武陵构造旋回期、加里东构造旋回期、燕山构造旋回期和喜马拉雅旋回期。形成的典型构造样式分别有阿尔卑斯式褶皱、侏罗山式褶皱、逆冲推覆构造、韧性剪切带、变质核杂岩构造及伸展剥离断层系、平行走滑断层系、地垒—地堑构造等。在不同的构造旋回期, 其构造样式的差异反映出了所处构造位置的不同, 进而在平面上反映出江南造山带是由不同时期的造山亚带组成且具有向东迁移的演化历史的复合造山带。 

TYPICAL TECTONIC STYLES AND THEIR GEOLOGIC SIGNIFICANCE IN EASTERN GUIZHOU PROVINCE

The Mesoproterozoic-Neoproterozoic to Cenozoic strata,including many types of magmatite and metamorphite,are developed in eastern Guizhou Province.Multi-periods of tectonic movements happening in the study region have been divided into Wuling structural cycle,Caledonian tectonic cycle,Yanshan tectonic cycle and Himalayan tectonic cycle.Typical structural styles are Alpine fold,Jura-type fold,thrust-nappe structure,ductile shear zone,metamorphic core complexes,extension-stripped fault system,strike-slip faul...