东川运动及其对东川矿区褶皱构造的影响  

DONGCHUAN MOVEMENT AND ITS INFLUENCE ON FOLDING STRUCTURES IN DONGCHUAN MINING DISTRICT

作　　者：刘卫明[1,2] 刘继顺[1] 尹利君[1] 杨立功[1] 刘文恒[1] 豆松[1,3] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]江西理工大学资源与环境工程学院,江西赣州341000 [3]云南省有色地质勘查局,昆明650051

出　　处：《地质力学学报》2012年第1期42-51,共10页Journal of Geomechanics

基　　金：云南省省院省校合作项目(2003UDBEA00A026)

摘　　要：分析了当前东川运动的各种认识,通过上下地层的特征、构造、变质作用、火山-岩浆活动、形成背景以及汤丹、落雪和拖布卡3个典型剖面的研究,确定该运动是一次大规模的构造运动。东川运动是南北向挤压运动,在东川矿区下(昆阳)亚群形成东西向褶皱构造,被后期小黑箐和晋宁运动叠加改造后,其构造形迹变得模糊和复杂,但经仔细研究分辨出了10个较大的褶皱构造。The various understandings about Dongchuan Movement were analyzed.Researches on characteristics of the strata in Kunyang Group,metamorphism,volcano-magma activities,and typical profiles as Tangdan,Luoxue and Tuobuka show that Dongchuan Movement is a large-scale tectonic movement.Dongchuan Movement is SN-trend compressional movement.In Dongchuan mining district,EW-trend fold structures formed in the lower Kunyang subgroup.These EW-trend fold structures were reformed and transformed by later Xiaoheijing Movement and Jinning Movement.The structural features became indistinct and complex.But after a careful study,the 10 larger fold structures were distinguished in Dongchuan mining district.

关 键 词：东川运动 褶皱构造 昆阳群 东川矿区 

分 类 号：P542[天文地球—构造地质学]