摘要
运用构造与地层相结合的理论和方法，通过对张八岭地区已完成和正在进行的１０幅１：５万地质填图资料分析和典型地区的构造追踪，初步认为：北将军（岩）组自下而上分为三段，时代置于中元古代，获铅同位素年龄样值为１８２１±４１６Ｍａ；西冷（岩）组自下而上分为三段，时代置于青白口纪。区内主要存在三期构造交形：早期为一系列呈ＮＷＷ－近ＥＷ向的紧闭同斜褶皱，中期以韧性剪切带发育为特征，晚期以ＮＮＥ向为主的宽缓褶皱。三期变形共同叠加，形成区内基本构造格架。并对变形机制作初步探讨。
Based on ten sheets of finished and unfinished 1: 50000 scale pelogical mapping in the Zhangbaling area, the tracing of typicalstructures and the use in combination of structural and stratigraphical theory and method, the Beijiangjun lithologic association can be di-vided into three members in the middle Proterozoic with Pb - Pb isotopic age of 1821 + 416 Ma, the Xileng lithologic association also intothree members in the Qingbaikou period, and three stages of structural deformation can be delimited: a series of NWW - and nearly EW -trending tight congruous folds for the early one. characteristic development of ductile shear zone for the middle and the majorly NNE -trending wide - flat folds for the late. The superimposement of the three stages of deformation formed the basic tectonic framework of the
出处
《安徽地质》
1999年第1期26-29,共4页
Geology of Anhui
基金
1:5万池河镇等4幅区调及附近专题研究成果
安徽省地质矿产局的资助
关键词
变质地层
序列
构造型式
张八岭地区
metamorphosed strata , succession, structural pattem
