摘要
狐狸山金矿区，在无蚀变作用参与的韧性变形过程中，岩石化学成分发生了明显的变化。但大多数微量元素含量变化不大，稀土元素配分模式基本不变，它们可以反映原岩的特点。蚀变糜棱岩型矿体与围岩相比，稀土配分模式、亲硫元素Ａｕ、Ａｇ、Ｃｕ和两性元素Ａｓ、Ｓｂ含量差别显著，尤其是Ａｕ含量，前者是后者的百倍～几万倍，金的成矿作用主要与韧性变形后期富金流体的蚀变作用关系密切。
Althongh the composition of non-alterated rocks was changed apparently during ductile deformation in Hulishan gold-producting area,the variation in the bulk trace elements of these rocks seems to be limited and their REE patterns keep unchanged,which can reflect the characteristics of their parental metamorphic rocks.Obvious differences exist between the altering mylonite-typed ore bodys and the country rocks in REE pattern,content of sulphophile elements(Au, Ag, Cu)and amphiprotic elements (As,Sb).The content of Au in the former is n ×100￣n×1000 times higher than that in the latter.The mineralization of gold is related to the alteration of gold bearing fluid during the late stage of ductile deformation.
基金
地矿部定向基金
关键词
含金
剪切带
岩石化学
稀土族
地球化学
gold-bearing ductile shear zone,petrochemical composition, REE,trace element,western wutaishan
