The Discussion Of The Metallogenic Characteristics And Genesis Of The Qiong Kuduke Ag-Pb-Zn Deposit In Hami,Xinjiang,China

The QiongKuduke Ag-Pb-Zn deposit is located in Xiaoshitouquan,which is part of eastern Haerkuke volcanic arc,in northeastern Hami.Xinjiang.Through systematic study of geological and geochemical characteristics of QiongKuduke Ag-Pb-Zn deposit,I have obtained outcomes as follows:?1?There types of magmatic dykes was exposed,with ages of 312.1±1.7Ma for granite porphyry,314.3±1.5Ma for monzonitic granite,320.0±2.8Ma for biotite granite.The resluts indicates that rock mass in minefield intruded in the Early Carboniferous Epoch.The granite is characterized by high-K calc-alkaline series and peraluminous-metaluminous rocks and forms in arc-back environment.?2?The major metallic minerals are chalopyeite,aresenopyrite,chalcopyrite,pyrite,argentite and the gangue minerals are mainly quartz,calcite,mica,potash feldspar,etc.The structure of ores are impregnated structure and fine vein structure.The texture of ores are chalcopyrite exsolution texture and metasomatic relict texture.?3?There are two main kinds of fluid inclusions inclusions,respectively for the pure liquid phase and gas-liquid two-phase inclusions.Metallogenic stage?the following are the average?uniform temperature is 178?,salinity was 2.36%,the density of 0.91 g/cm³,pressure is 30.86 MPa,metallogenic depth of 1.02 km.According to the characteristics of the ore-forming fluid of low temperature and low salinity,low density,low pressure and metallogenic characteristics of shallow depth etc.Inclusions in the gas phase composition mainly for H₂O,CO₂,CH₄ and small amounts of organic gases.?4?Isotope geochemistry results show that the sulfur element of?³⁴S major change in ore range is larger,with?³⁴S mean of 3.14‰,likely that Joan of sulfur in the deposits in the libraries are grams from deep source magma or mantle.To metallogenic stage quartz samples of H-O isotope analysis tests show that the ore-bearing hydrothermal average of 86.810‰,?D_?-SMOW and?¹⁸O_V-SMOW-SMOW average was 6.1‰,the fluid of?D_?-SMOW and?¹⁸O_V-SMOW values into the H-O isotopes in the diagram.Quartz sample number of H-O isotopes in magma underwater projection point distribution,indicating Joan libraries are grams of ore deposit metallogenic fluid from magmatic water and atmospheric precipitation.?5?Regional tectonic evolution,inner the early late carboniferous volcanic eruption,volcanic ash deposition to form the main mining area of strata,volcanic eruption assault on residual magma formed after the volcanic,time will late volcanic hydrothermal ore gas liquid along the structural fissure filling metasomatic and mineralization.Mining area mineralization related rocks exposed to the surface of li west middle granite porphyry.?6?Combining previous study of hypabyssal type low temperature hydrothermal deposit,the author thinks that library Joan duke silver polymetallic deposit belongs to epithermal deposits in low temperature.