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.
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
