摘要
本文采用历史分析与力学分析相结合的原则,研究山西太古代至中生代五次主要构造运动的形变特征、主应力方向及分布规律。中太古代晚期(阜平运动)以SSW向挤压为主;晚太古代末期(五台运动)、早元古代末期(吕粱运动)和侏罗纪(燕山运动)受SE—SEE向挤压;白垩纪(四川运动)以SSW向挤压为特征。五次构造运动的最大主压应力均呈近水平方向。
Using the principle of combining historic analysis with mechanical analysis, the deformation characteristics, stress orientations and distributions of the five main tectonic movements from Ar-chaean to Mesozoic in Shanxi province were discussed. In the late stage of Middle Archaean (the Fuping movement), a series of folds were formed by compression with NNE - SSW orientation. In the late stage of Late Archaean (the Wutai movement), the fold system and some intrusions were developed, which was controlled by ME - SW trending compression. In the late stage of Early Pro-terozoic (the Luliang movement), a series of NW - SE trending isoclinal folds and thrusts were formed by NW - SE orientation compression. In Jurassic (the Yanshan movement), thrusting, folding and intruding occurred, which was formed under the NWW - SEE trending compression. In the Cretaceous (the Sichuan movement) , a series of NWW trending folds and NE -NNE trending fault - depression basins were developed by compression of NNE - SSW orientation. The maximum principal axes of the compressive stress in the five tectonic movements are nearly horizontal.
出处
《现代地质》
CAS
CSCD
1991年第4期355-365,共11页
Geoscience
关键词
构造
应力场
太古代
中生代
山西
: Aschaean-Mesozoic, tectonic stress field, deformation characteristics, directionsof principal Stress
