内蒙古哈达门沟金矿床13号脉构造叠加晕模式及深部找矿预测

哈达门沟金矿床13号脉受断裂构造控制，具有多期多阶段叠加成矿（晕）的特点.矿床分为4个成矿阶段，各成矿阶段元素含量和地球化学特征参数表明，金成矿与金属硫化物关系密切.第Ⅰ阶段成矿较弱，第Ⅱ、Ⅲ阶段为主成矿阶段，第Ⅳ阶段不成矿.确定矿床的头晕元素为As、Sb、Hg，矿体晕元素为Au、Ag、Cu、Pb、Zn、Bi，尾晕元素为Ni、W、Co、Mo.建立了原生叠加成矿成晕模式，矿脉在垂向上形成串珠状分布的多个富集矿体，各富集矿体上部存在头晕元素异常，中部对应矿体晕元素异常，下部存在尾晕元素异常，富集矿体之间存在头、尾晕元素共存区.总结了应用模式找矿的准则，认为在含矿构造带内，Au品位较低时，如果存在头、尾晕元素共存，则指示深部有矿，当再叠加Cu、Pb、Zn等元素异常时，指示深部矿体还很富.同时，利用构造叠加晕模式和深部预测标志对已知矿体深部进行盲矿体预测，在实践生产中得到了很好的验证.

STRUCTURAL SUPERIMPOSED HALOS AND DEEP PROSPECTING PREDICTION FOR NO.13 VEIN IN HADAMENGOU GOLD DEPOSIT,INNER MONGOLIA

The No.13 ore-vein of the Hadamengou gold deposit is controlled by fault and characterized by primary halo superimposition of multi-phase and multistage.The metallogenic process can be divided into four stages.The mineralization,occurring mainly during the second and third stages,is geochemically related to metal sulfides.Based on the spatial distribution of ore-forming elements,their vertical zoning is recognized as the front halo（As-Sb-Hg）,ore-body halo（Au-Ag-Cu-Pb-Zn-Bi） and rear halo（Ni-W-Co-Mo）.The model of primary halo superimposition is established in the meantime.The veins consist of many rich orebodies in moniliform vertically.The front halo and rear halo coexist between the orebodies.The prospecting rules are summarized based on the structural superimposed halos.In the ore-bearing structural belts with low grade of gold,the coexistence of front and rear halos suggests orebodies in the deep.The multiple superimpositions of halos by abnormities of Cu,Pb and Zn indicate rich orebodies in the deep.The model of structural superimposed halos is applied to predict blind ore-bodies in the deep.The result is proved to be practical.