The CO2-rich fluid inclusion is often seen in the hypometamorphic mineral. Based on the systematical freezing and heating stage observation of fluid inclusions yet, we reveal that the primary fluid inclusion of the main ore-forming stage in the Jinding and periphery deposits are CO2-rich and hydrocarbon-bearing by laser Ro-manor microprobe researches, and the composition variation is evident. The CO2 vs hydrocarbon and CO2 vs H2O are negative-relation in the ore-forming fluid, respectively, and the hydrocarbon vs H2O is positive-rela-tion, and the composition of oxygen- and carbon-isotopes have been analyzed. It is suggested that the partial CO2 was from the mantle and the other from the decomposition of the carbonate rock and the organic matter within the strata, and the water and the hydrocarbon in the ore-forming fluid were mainly from meteorological basin brine and the stratum organic matter. The CO2-rich and hydrocarbon-bearing inclusion formed by selec tion trap of the mineral in the brine of CO2-hydrocarbon that did not dissolve each other completely. The mantle source CO2 may make a remarkable contribution on the transportation of the ore-forming metal from the mant-le , and the hydrocarbon played an important role on the metal precipitation. The ore-forming fluid is character-ized by the mixing of mantle source fluid (CO2- and metal-rich) and crust source fluid (the basin fluid is rich in hydrocarbon and water) , and it may suggest that the mixing of two types of fluids was a basic way of mineral-ization.