CAJ | 학술논문

通过对双朋西金铜矿床流体包裹体岩相学、测温学及矿石铅、硫同位素等的分析,研究成矿流体性质和演化、成矿流体来源.结果表明:流体包裹体主要为气液两相包裹体,另有少量液相和含子矿物包裹体.包裹体液相成分阳离子以Na~+,K~+,Ca~(2+)为主,阴离子主要以SO_4~(2-),Cl~-为主;气相以H_2O,CO_2为主.均一温度范围为210～370℃和370～460℃,盐度3.0%～6.5%,密度集中于0.600～0.800 g/cm~3,压力主要为8.0～20.0 MPa,为中高温、中等盐度、中等密度、中等压力的成矿流体.铅同位素~(206)Pb/~(204)Pb为18.058～18.710,~(207)Pb/~(204)Pb为15.581～15.641, ~(208)Pb/~(204)Pb为38.191～38.531,δ(~(34)S)为+3.1×10~(-3)~+6.2×10~(-3),平均值为+4.42×10~(-3),成矿流体铅、硫同位素来源为壳幔混合源.
통과대쌍붕서금동광상류체포과체암상학、측온학급광석연、류동위소등적분석,연구성광류체성질화연화、성광류체래원.결과표명:류체포과체주요위기액량상포과체,령유소량액상화함자광물포과체.포과체액상성분양리자이Na~+,K~+,Ca~(2+)위주,음리자주요이SO_4~(2-),Cl~-위주;기상이H_2O,CO_2위주.균일온도범위위210～370℃화370～460℃,염도3.0%～6.5%,밀도집중우0.600～0.800 g/cm~3,압력주요위8.0～20.0 MPa,위중고온、중등염도、중등밀도、중등압력적성광류체.연동위소~(206)Pb/~(204)Pb위18.058～18.710,~(207)Pb/~(204)Pb위15.581～15.641, ~(208)Pb/~(204)Pb위38.191～38.531,δ(~(34)S)위+3.1×10~(-3)~+6.2×10~(-3),평균치위+4.42×10~(-3),성광류체연、류동위소래원위각만혼합원.
Based on study of the fluid inclusion, thermometry and isotope analyses, the characteristics of ore-forming fluid, fluid evolution and the origin of Shuangpengxi gold-copper deposit were discussed and systematically studied. The results showed that these inclusions are generally consisted of 2 (gas and liquid) phases. and minor liquid and solid sub-mineral phase. The liquid phase includes cations dominated by Na~+,K~+,Ca~2 and ions by SO_4~(2-),Cl~- and gas phase H_2O,CO_2. The homogenization temperature, salinity and density and pressure of the fluid inclusions are medium ones ranged from 210℃ to 460℃,and 3.0% to 6.5%,and 0.600 to 0.800 g/cm~3,and 8.0 to 20.0 MPa, respectively. Analysis of ~(206)Pb/~(204)Pb is in range of 18.058-18.710, ~(207)Pb/~(204)Pb 15.581-15.641, ~(208)Pb/~(204)Pb 38.191-38.531; δ(~(34)S) value +3.1×10~(-3)-+6.2×10~(-3) (average +4.42×10~(-3)) indicating the crust-mantle mixed origin of Pb and S.