新疆江格结尔地区铜铅锌矿床特征及其成因

The Characteristics and Genesis of Cu-Pb-Zn Deposits in Jianggejieer Area of Wuqia,Xinjiang

江格结尔地区铜铅锌矿位于萨热克-乌拉根铜铅锌成矿区的过渡带,江格结尔铜矿与萨热克铜矿均产于上侏罗统库孜贡苏组杂砾岩中;江格结尔铅锌矿与乌拉根铅锌矿均产于上白垩统克孜勒苏群砂砾岩中。该地区的铜铅锌矿床与萨热克铜矿和乌拉根铅锌矿具有很多相似性,表现在成矿物质主要来源于盆地周边的隆起剥蚀区,即苏鲁铁列克隆起中的中元古界长城系基底地层;铜铅锌矿床的形成都与油田卤水或富烃类的还原性盆地流体有关,该成矿流体通常沿断裂带上侵,并在渗透率较高的杂砾岩层或砂砾岩层中沉淀并富集成矿,在矿石及近矿围岩裂隙中常可见大量黑色沥青物质。

The Cu-Pb-Zn deposits in Jianggejieer area are located in the transitional zone of Sareke-Wulagen metallogenic belt.Both Jianggejieer copper deposit and Sareke copper deposit occur in the upper Jurassic Kuzgongsu group conglomerate;Both Jianggejieer Pb-Zn deposit and Wulagen Pb-Zn deposit occur in the upper Cretaceous Kezilesu group glutenite.There are many similar characteristics between the Cu-Pb-Zn deposit in Jianggejieer area and Sareke copper deposit&Wulagen Pb-Zn deposit.The Ore-forming materials for these deposits were mainly derived from the uplift denudation area around the basin,namely the middle Proterozoic Changcheng basement stratum formatiom in the Sulutieluoke ridges.The Cu-Pd-Zn deposits are closely related to the oil-field brine or reduced basin fluid with rich hydrocarbon.In the fractures of ore and nearby surrounding rocks,we can see a large amount of black bituminous materials due to the ore-forming fluid upward along the fault and precipitation in gravel layer with high permeability.