【摘要】 闽西北“大金山组”地层属早一中元古代。在加里东变质作用期间普遍遭受了不同程度的区域变质作用，形成了各种变质岩。本文通过岩石化学研究恢复大金山组地层的原岩后，认为该地层中的副变质岩的原岩属于陆源浅海沉积碎屑岩；其中的角闪岩的原岩是生成于大陆岛弧或大陆板块边缘构造环境中的钙碱性玄武岩。更多还原

【Abstract】 Dajinshan group stratum ,the lower-middle proterozoic stratum,is metacorphsed and formed into a metamorphic rock.According to Petrochemistry,this paper deals with pro-tolith of Dajinshan group stratum , Its para-metamorphic rock protolith is considered to be ter-rigenous shallow-sea deposit dastic rock , and the protolith of amphibolite is the calc-alkaline basalt formed in the tectonic setting of continental are or continental plate margin更多还原