摘要
本文采用历史分析与力学分析相结合的原则,研究元古代到侏罗纪四次重要构造事件的形变特征、主应力方向及分布规律。元古代晚期(晋宁事件)以南北向挤压为主;早古生代(加里东事件)是受近东西向挤压;三叠纪(印支事件)是南早北晚、南强北弱运动;侏罗纪(燕山事件)以NWW-SEE向挤压为特征,是该区构造格架基本定型的时期。
Using the principle of combining historic analysis with mechanical analysis, the deformation characteristics, stress orientations and distributions of four main tectonic events from the Proterozoic to the Jurassic were discussed. In the Late Proterozoic (the Jinning event),a series of isoclinal folds were formed by compression of north-south orientation. In the Early Palaeozoic (the Caledonian event), a fold system obviously developed near east-west orientation compression. In the Triassic (the Indosinian event), the fold system and some granitic intrusions were widespread developed, which was earlier and stronger in the south than that in the north. In the Jurassic (the Yanshanian event), a series of NE-NNE trending thrusts and folds and remelted granites along the thrusts were formed, which was characterized by NWW-SEE trending compression. This is the fundamental setting stage of tectonic framework in the area.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1989年第1期45-50,共6页
Earth Science-Journal of China University of Geosciences
