皖南地区葛公镇组砾岩性质及其构造含义  

Characters and its tectonic implication of basal conglomerate from Gegongzhen formation in southern area of Anhui province

作　　者：杜建国[1,2] 孙乘云[3] 许卫[3] 杜森官[3] 王有生[3] 谢建成[3] 黄耀华[3] 陶启云[3] 

机构地区：[1]中国地质大学(北京) [2]安徽省地质调查院,安徽合肥230001 [3]安徽省地质调查院

出　　处：《资源调查与环境》2002年第2期107-112,共6页Resources Survey & Environment

基　　金：国土资源大调查项目 :1:2 5万安庆市幅区域地质调查项目资助

摘　　要：皖南地区葛公镇组底砾岩在区域上具有广泛的分布和可比性 ,其底部界面属I型不整合面 ,该界面的出现也预示江南造山带中元古宙大陆边缘沟 -弧 -盆构造体制开始发生转折和最早一幕造山运动的出现 ,这套砾岩及其底界面性质的确定对江南造山带的构造演化具重要意义。Basal conglomerate of Gegongzhen formation is extensively distributed and comparable in Southern area of Anhui province and its adjacent region, and its basal interface belongs to an I-type surface of unconformity. It implicates that trench-arc-basin system in Yangtze continental margin change and the first epoch orogenic movement occurred in middle Proterozoic. Basal conglomerate of Gegongzhen formation carefully researched is important signification on studying evolution of Jiangnan orogenic belt in late Proterozoic.

关 键 词：性质 葛公镇砾岩 I型 不整合面 构造含义 皖南地区 构造演化 

分 类 号：P588.212.5[天文地球—岩石学]