摘要
朱林西金矿床是金山金矿田内第四大金矿床。该矿床成矿阶段分为4个阶段,硫化物-铁镁碳酸盐阶段为主成矿阶段。流体包裹体岩相学研究表明,含金石英脉中含有气液二相水溶液包裹体(Ⅰ型)和纯液相包裹体(Ⅱ型)2种类型。测温研究表明,成矿流体温度约为204℃~328℃,盐度为2.63%~9.97%,pH值为5.84,Eh值为0.17 V,反映矿床形成于中温、弱酸性、氧化环境。氢、氧同位素研究表明,成矿流体δD为-79.3‰^-61.9‰,δ^(18)O_(H_2O)为-0.2‰~1.0‰,成矿流体属于岩浆水和大气降水混合的产物。岩浆水与大气降水的混合促进了金的再次富集与沉淀成矿。
Zhulinxi Gold Deposit is the fourth largest gold deposit in Jinshan Gold Field. The sulfide - iron magne-sium carbonate stage is the main mineralization stage among the 4 mineralization stages. Petrography of the fluid inclu-sions shows that there is liquid-gas two-phase aqueous solution inclusions（ type I ） and single-liquid inclusions（ type II ） in auriferous quartz veins. Thermometric research shows that ore-forming temperatures range from 204 ℃ to 328 ℃ , while salinities range from 2. 63 % to 9. 97 % . The pH of ore-forming fluids is 5. 84, while the is0.17 V , indicating that the deposit was formed in a medium temperature, acidic and oxidizing environment. H - 0 isotope study shows that the of ore-forming fluids ranges from -79.3 ‰ io -61.9 ‰,while the δ^18OH2O ranges from -0.2 ‰ to 1.0 indicating that the ore-forming fluids were mixture of magmatic water and meteoric water and that they pro-moted the re-enrichment and precipitation of Au.
出处
《黄金》
CAS
2017年第8期8-15,共8页
Gold
基金
中国黄金集团公司地质找矿科研项目(中金股运营[2016]188号)
