Geology and geochemistry of trace elements of Qiaoxiahala copper (Iron) and gold deposit in Fuyun county, Xinjiang

In this paper, the author introduced briefly the metallogenic characters and trace element s geochemistry of Qiaoxiahala copper (iron) and gold deposit, and summarized the relevant spatial distributive feature of its main ore bodies with "vertical zonation" and"downward synchronal enrichment of Cu and Au". It was thought that its host volcanic rocks and some intermediate-basic intrusive veins have basically similar geochemical behavior of trace elements, and that the ores of Cu and Au have lower contents of K,Rb,Th and Ba,and higher contents of W,Ni,Co,As,Sb and Zn,and obviously lower ratios of Th/Ta and La/Yb than host volcanic rocks.By studying their REE geochemistry,it was discovered that the ores of Cu and Au display strong enrichment of Eu absolutely different from host volcanic rocks,and that geologic bodies formed in later period have lower contents of REE than those formed in earlier period in most cases.On the basis of systematic analyses,Qiao xiahala copper(iron)and gold depositis considered as a kind of volcanic hydrothermal type "stratabound deposit" accompanied with "stratiform skarn".