雪峰山地区前震旦纪大地构造演化及沉积岩相特征  

PRE-SINIAN GEOTECTONIC EVOLUTION AND SEDIMENTARY FACIES IN XUEFENGSHAN AREA

作　　者：胡宁[1] 谌建国[1] 

机构地区：[1]宜昌地质矿产研究所,宜昌443003

出　　处：《华南地质与矿产》1999年第4期10-15,共6页Geology and Mineral Resources of South China

基　　金：地质矿产部定向基金研究项目"雪峰山地区金矿成矿条件及远景预测"的部分研究成果

摘　　要：本区冷家溪群为奠基于结晶基底之上的陆间裂陷槽沉积的产物,强烈的武陵造山运动,使其基本固结并形成褶皱基底,从而开辟了一个新的构造演化阶段。板溪群及其与之相当地层为板内被动陆缘沉积,无论是沉积性质还是变形变质作用均具有沉积盖层的特征。Systematical study on sedimentary and metamorphic facies shows that: (1) the Proterozoic Lengjiaxi Group in Xuefengshan area represents a sedimentary sequence of intercontinental rift system and consists a part of the folded basement of the Yangtze Block after consolidation during the Wuling Orogeny; (2)the Neo-Proterozoic Banxi Group is of the characteristics of passive continental margin type deposit and should be the first cover of the Yangtze Platform.

关 键 词：沉积岩相 构造演化 前震旦纪 雪峰山地区 

分 类 号：P588.2[天文地球—岩石学] P547[天文地球—地质学]