江西银山矿区黄铁矿的标型特征研究

TYPOMORPHIC CHARACTERISTICS OF PYRITE IN THE YINSHAN MINING AREA,JIANGXI

银山矿区黄铁矿有七个世代，其中与矿化密切的为３～６世代，随着矿化的演化，黄铁矿中硫相对减少，砷相对增高。银山黄铁矿微量元素以高Ａｓ、Ｔｅ，低Ｓｅ、Ｃｏ、Ｎｉ，且Ｓｅ／Ｔｅ＜１，Ｃｏ／Ｎｉ＜１为特征，黄铁矿的稀土元素配分型式与矿区火山岩－次火山岩相一致，ΣＣｅ／ΣＹ＞１，无明显的铕异常，黄铁矿δ３４Ｓ‰为３．９，离差较小，对成矿的物质来源有指示作用。银山矿区黄铁矿的微量元素与德兴斑岩铜矿床的黄铁矿微量元素差别较大，反映出这两个矿床的差异性。

There are seven generations of pyrites in the Yinshan mining area,in which the third￣sixth generations are closely related to the mineralization.In pyrite,sulfur relatively decreases,and arsenic relatively increases with evolution of the mineralization. The trace elements in pyrite are charactered by high content of As,Te,low content of Se,Co,Ni,and Se/Te<1,Co/Ni<1. The REE partitioning pattern in pyrite is identical to that in volcanic-subvolcanic facies with ΣCe/ΣY>1,and without obvious europium anomaly.δ 34 S in pyrite is 3.9‰ with a little variation,indicating the material source of the mineralization. The trace elements in pyrite in the Yinshan mining area are more different from that in the Dexing copper deposit,which reflect the differentiation of the both deposits.