Based on the study of the fluid inclusion, thermometry and isotopes analyses, the characteristics of oreforming fluid, fluid evolution and the origin of the Shuangpengxi gold-copper deposit were discussed and systematically studied. The results showed that: ①These inclusions consisted of mainly 2 phases of gas and liquid. Analysis showed that the compositions of liquid and gas in the inclusions were Na⁺,K⁺,Ca²⁺,SO₄^2-,Cl^-,H₂O,CO₂.②The homogenization temperature, salinity and density and pressure of fluid inclusions for the mineralization, ranged from 210℃ to 460℃，and 3.0％ to 6.5％，and 0.600 to 0.800（g/cm³），and 8.0 to 20.0 MPa,respectively being middle-high temperature, middle salinity, middle density and middle pressure fluid.③Pb isotope ²⁰⁶Pb/²⁰⁴Pb range from 18.058 to 18.710,²⁰⁷Pb/²⁰⁴Pb range from 15.581 to 15.641, ²⁰⁸Pb/²⁰⁴Pb range from 38.191 to 38.531, δ³⁴S value(‰) range from +3.1 to +6.2(average +4.42),indicating that the source of Pb and S from crust mantle mixed origin.
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