甘肃敦煌地区太古宙孔兹岩系特征  

THE CHARACTERISTICS OF ARCHEAN KHONDALITE SERIES IN DUNHUANG，GANSU PROVINCE

作　　者：于海峰[1] 梅华林[1] 李铨[1] 

机构地区：[1]地矿部天津地质矿产研究所,天津300170

出　　处：《前寒武纪研究进展》1998年第1期19-25,共7页Progress in Precambrian Research

基　　金：地矿部课题!9502011-02

摘　　要：本文根据甘肃敦煌地区广泛出露在太古宙TTG杂岩中的一套副变质岩系的岩石组合、典型矿物组合、变质相特征和岩石化学特征的分析，认为它们是一套中深变质的碎屑岩-泥质岩-泥灰岩-碳酸盐建造，其中夹有少量的变质基性火山岩。原岩形成于具有基性火山作用的活动大陆边缘滨海-浅海环境。经过太古宙的区域高角闪岩相变质作用，形成孔兹岩系。A parametamophic rock series widely exposed in Archean TTG complex inDunhuang area, Gansu Province is recognized of a formation of middle - high grademetamorphosed clastic rock - mudrock - mudstone - carbonate, with a little meta - basicvolcanite, through the analysis of lithological associations, typical mineral assemblages. thefeatures of metamorphic facies and the chemistry compositions. Its original rock is sedimented inthe environment of active epicontinent - seaforrd with basic volcanism, and become khondaliteseries through the Archean regional high - amphibolite facies metamorphism.

关 键 词：太古宙 孔兹岩系 敦煌地区 碎屑岩 泥质岩 

分 类 号：P588.21[天文地球—岩石学] P588.212.1[天文地球—地质学]