GEOLOGY AND GEOCHEMICAL FEATURES OF QIYUGOU GOLD DEPOSIT IN HENAN PROVINCE AND DISCUSSIONS ON THE GENESIS OF ORE DEPOSIT

In this paper, the authors has introduced the geological background of mineralization and geology and geochemical features of Qiyugou gold deposit, discussed the genesis of ore de-posit.Through the research on the feature of rock body mineralogy, S, Pb, H and O isotopic geology and fluid inclusion of the ore-bearing breccia body, the authors conside that the ore-forming material mainly came from the underlying Taihua Group of Archean eonothem. Gas-liquid explosive breccia body is the host structure.Mineralization went on under the condition of gas-liquid explosion-boiling action after Mesozoic magmatic activity stage. Mineralizing fluid is mainly magmatic water, and mixed with part of meteorological water.The genesis of ore deposit belong to magmatic hydrothermal deposit.