Research On Geological Features And Genesis Of Hedong Gold Deposit, Zhaoyuan City, Shandong Province

Hedong Gold Deposit is located in the Branch fault of the Jiaojia Fault Zone —Wangershan fault. In the Northwest, typical altered rock type gold deposit, The feature are wall rock alteration change developed, complex structure, veinlet disseminated and veinlet ore. Through research of geological characteristics of mineralization, H-O-S stable isotope geochemistry, fluid inclusion are the controlling-ore condition analysis, to elucidate the relationship between the properties and formation of ore-forming fluid, to explore the ore-forming mechanism, the some conclusions are drawn as follows:(1) Hedong gold deposit belongs to the typical fracture altered rock type, distributed in NE Wangershan fault zone. Mineralization hydrothermal fluid activity is controlled by Wangershan fault,which provides migration channels and sites for precipitation of ore-forming fluids and substances.(2) Hedong Gold Deposit Mineralization is not directly related with guojialing granite and Linglong granite. It is only directly wallrock. The mineralization is closely related with Mesozoic mafic dikes.(3)The studies of H-O-S stable isotope geochemical show that ore-forming fluid was derived from mixed magmatic and meteoric water water source, sulfur source is same as guojialing granite,source of ore-forming materials is the Precambrian metamorphic basement rocks and Cretaceous magmatic group,with mixed source characteristics.(4) According to the morphological characteristics of the ore body,ore structure,mineral assemblages, wall rock alteration types and fluid inconlusion,Hedong Gold Deposit belongs to the epithermal fissure filling metasomatic type.