成矿流体是大气水和沉积地层水的混合溶液。
The ore -forming fluid is a mixed solution of the atmospheric water and sedimentary stratal water.
闽西北中元古代地层在加里东运动期间遭受了变形变质作用，形成了一套片岩—片麻岩—混合岩系变质岩。
The Middle Proterozoic group Strata in northwest Fujian had been Subjected metamorphism in Caledonian orogeny, and formed a metamorphic rock association of schist-gneiss-migmatite series.
但其基底地层和混合岩形成时代较晚，为寒武纪和下古生代。
The basement strata and the migmatite, however, were formed much later, about Cambrian period and early palaeozoic era.
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