内蒙红花沟金矿床地质特征与原生晕深部预测

内蒙红花沟大型金矿床是华北地台北缘赤峰-朝阳金矿化集中区重要的矿床类型之一.矿床产于太古代建平群深变质岩中,矿体产出受NW向断裂构造控制,金矿化与中生代侵入岩关系密切,矿石类型主要为石英脉型.在充分了解矿床地质、矿化特征的基础上,对该矿床H2号脉的地球化学特征、深部原生晕分带规律进行了研究,发现该矿脉垂向上具有明显的分带性,该垂向分带在红花沟矿区具有普遍性,正确识别这种分带对于红花沟金矿床深部预测具有重要意义.同时确定了红花沟金矿床原生晕轴向分带序列(As-Sb-Ni-Cu-Co-Zn-Pb-Ag-Hg-Au-Mo-Bi)为一典型的正向分带序列,在此基础上对矿床的深部成矿前景进行了预测.

Geological Characteristics and Prediction of Primary Hola at Depth in Honghuagou Gold Deposit, Inner Mongolian

Honghuagou large gold deposit in Inner Mongolia is one of the important deposit types in Chifeng-Chaoyang gold mineralization concentrated region on the north margin in the North China platform.The deposit occurs in the deep metamorphic rock of Archean Jianping formation,with the orebodies controlled by NW fault structure.The gold mineralization is closely related to the Mesozoic intrusion rock and the ore is mainly of quartzite vein type.Based on a thorough understanding of the deposit geological and mineralization characteristics,study was made on the geochemical characteristics of the deposit's H2 vein and the zoning law of the deep primary halos.It was found that there is evident zoning on the vertical direction of the vein and the vertical zoning is typical in Honghuagou ore field.Therefore,the correct identification of this type of zoning is of great importance in the prediction of the depth of Honghuagou gold deposit.It was also determined that the axial element zoning of the primary halos of this deposit (As-Sb-Ni-Cu-Co-Zn-Pb-Ag-Hg-Au-Mo-Bi) is a typical positive zoning sequence,based on which,the mineralization of the depth of this deposit was predicted.