| Abstract: | The Qinggouzi stibnite deposit is located in Huashan Town , Jilin Province , in the northeastern mar-gin of North China Craton (NCC).It is controlled by fault structures , hosted within structurally controlled fel-sic dykes , predominantly surrounded by phyllite , schist and quartzite .This study presents the results of fluid inclusions studies , intending to determine the source of the fluid responsible for ore-formation, hence exploring its metallogenesis .The aqueous biphase inclusions are identified in the stibnite-bearing quartz veins of the de-posit.Moreover, aqueous biphase inclusions are further classified into ① biphase liquid-rich inclusions (1a) and ②biphase gas-rich inclusions (1b) depending upon liquid to gas ratio trapped within the fluid inclusions . Homogenization temperatures for (1a) and (1b) range between 114.8℃to 422℃and 128.3℃to 267.5℃, respectively.1a and 1b have salinities of 0.18％to 16.14％NaCleqv and 1.22％to 12.88％NaCleqv, and den-sity range from 0.43 to 1.02 g/cm3 and 0.81 to 0.98 g/cm3 , respectively .Sulfur isotopic analysis indicatesδ34 SV-CDT from 4.4 ×10 -3 to 6.5 ×10 -3 , with an average of 5.2 ×10 -3 , whereas H isotopes values on δDV-SMOW standard are -100.8 ×10 -3 and -107.5 ×10 -3 , while O isotopes data on δ18 OV-SMOW standard range between 20.1 ×10 -3 and 20.4 ×10 -3 .Fluid inclusions study , combining with sulfur and H-O isotopic data reveal that the ore-forming fluids originated from deep source and were subsequently contaminated by meteoric water .Hy-drostatic pressure calculation shows that the minimum and maximum pressures are 11.65 and 42.33 MPa, and relevant depths of deposit are estimated to be 1.16 and 4.23 km.Finally, we inferred that Qinggouzi stibnite deposit is a medium-low temperature , low salinity hydrothermal deposit , which is formed by deep source and later contaminated by meteoric water , and is classified as epizonal deposit in terms of orogenic series . |
