华北地台北缘东部地区金矿成矿地质特点及预测

工作区处于华北地台北缘与内蒙古大兴安岭地槽褶皱系的交汇部位,构造复杂,东西向古基底构造中的深大断裂间形成了金、铜、铅锌、银多金属矿带。金矿多分布在太古代或元古代的变质岩系中,多属古老基底隆起区的边部或受断裂构造控制的内部。含金石英脉型、构造破碎蚀变岩型、岩浆热液脉型是本区的主要类型,经预测该区约有378 t金矿资源找矿潜力,划分出2个成矿带和8个成矿区。

The Gold Deposit Metallogeny Characteristics and Forecast in Eastern Area of North China

The research area with completed locale at the intersection site between north margin of north china and Daxinganling geosynclinal fold system in Inner Mongolia, which have complicated structures and Au, Cu, Pb, Zn, Ag polymetal belt occur in deep fault of EW direction basement structure. The gold deposits mainly distribute in Archean or Proterozoic metamorphic rock, and controlled by the margin of basement upwelling area or fault structures. gold deposit types are quartz vein type, structure fracture alteration rock type and magmatic hydrothermal vein type. The author classified 2 metallogenic belts and 8 metallogenic areas, and forecast 378 tone Au resources exploration potentials.