现代地质Issue(1)：109-118,10.
黔东桂北加里东期两类构造变形特征与成因机制探讨
Characteristics and Genesis of Two Types of Tectonic Deformation During Caledonian in Eastern Guizhou and Northern Guangxi
摘要
Abstract
Taking place in Eopaleozoic,Caledonian movement caused strong deformation in southern China and was mainly represented by episodic movements of Duyun and Guangxi.Comprehensive research on tectonic deformation and sedimentary environment holds that Duyun movement,as a local one,evidently influenced the middle and southern parts of Guizhou,the western area of Kaili-Sandu fault.Whereas,Guangxi movement orig-inated from the squeezing of the Yangtze block and the Cathaysian block along the Jiangshan-Shaoxing fault. Under the influence of time and space,together the two movement events have formed two types of tectonic char-acteristics bordered by fault fracture.To the west of the fault fracture,this area is mainly influenced by Duyun movement and structures like EW folds and normal faults are developed.To the east,Guangxi movement shows its power,and structures such as NE folds and shear zones can be seen.The time of the occurrence of Guangxi movement is determined by samples collected from the study area.Among which samples from the ductile shear zone in Gaowu show that the plateau age of 40Ar/39Ar of muscovite is (41 6.4 ±1.8)Ma,and isochron dating is (41 7.7 ±1.8)Ma;those from NE cleavage belt in Liping show that the plateau age of 40Ar/39Ar of sericite is (426.5 ±2.3)Ma,and isochron age is (437 ±1 0)Ma.关键词
加里东运动/EW向变形/NE向变形/40Ar-39Ar定年/黔东桂北Key words
Caledonian movement/EW deformation/NE deformation/40 Ar-39 Ar geochronology/eastern Guizhou and northern Guangxi分类
天文与地球科学引用本文复制引用
汤世凯,马筱,杨坤光,邓新,戴传固,张慧,周琦..黔东桂北加里东期两类构造变形特征与成因机制探讨[J].现代地质,2014,(1):109-118,10.基金项目
贵州省国土资源厅“贵州区域构造特征、构造演化与矿产空间分布关系研究”项目；国家自然科学基金项目（41172189）。 （）
