延边地区白石砬子白钨矿矿床地质特征及成因探讨

白石砬子白钨矿床产于下古生界青龙村群大理岩与华力西晚期黑云母斜长花岗岩接触带内;矿体呈脉状、扁豆体产出,受北东向断裂构造和接触带构造控制明显;赋矿岩石以石榴石矽卡岩为主,矿石中金属矿物以白钨矿为主,其次为黄铜矿、磁黄铁矿、黄铁矿等,非金属矿物有钙铝石榴石、钙铁辉石、透辉石、绿帘石、方解石、石英。矿床特征及与国内典型矿床对比分析表明,白石砬子矿床的成因类型属接触交代型白钨矿矿床。青龙村群大理岩、海西华力西晚期花岗岩体、北东向断裂和接触带构造对该矿床形成具有重要控制作用,矿区及外围具有较大的成矿潜力和找矿远景。

Geological features and ore genesis of Baishilazi scheelite deposit in Yanbian area

The Baishilazi scheelit deposit is located in congtacting zone between the marble of the late Palaeozoic Qinglongcun Group and the Hercynian biotite granite.The vein and lenticular major ore body is obviously controlled by NE-extending faults and contacting zone.Metal minerals in the skarn ore include scheelite,pyrite,chalcopyrite and magnetic pyrite.Nonmetal minerals are mainly made of garnet,mussite,scorza,calcite and quartz.Geological features indicate that the Baishilazi scheelite belongs to the skarn deposit.The marble of the Qinglongcun Group,the Hercynian biotite granite,NE extending faults and contacting zone are closely related to the scheelite mineralization.The deposit has large ore prospecting potential.