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新疆哈图金矿床赋存在石炭系基性火山岩-火山碎屑岩中,矿体受古火山口断裂系控制。矿脉内流体包裹体较为丰富,主要为气液相NaCl-H2O包裹体和少量的NaCl-CO2-H2O包裹体。成矿热液中富含CO2、N2、Na+、K+、Cl-和SO2-4,而所含的成矿元素以Au-As-Ag-Sb组合为特征。成矿热液为低盐度流体,主成矿阶段的盐度为4.1wt%~6.3wt%NaCl,密度为0.88~0.80g/cm3,fO2为10-35~10-31Pa,Eh为0.60~0.80eV,为还原环境。金沉淀成矿的最佳温度为230~260℃。哈图金矿成矿热液不是典型的岩浆热液,而是受到了古大气水混入的火山晚期热液。流体不混溶、水-岩反应及古大气水的混入是造成本区金沉淀成矿的主要因素。
The Hutu gold deposit in Xinjiang is hosted by Carboniferous base volcanic-pyroclastic rocks controlled by the ancient crater fault system. The fluid inclusions in the veins are rich, mainly gas-liquid NaCl-H2O inclusions and a small amount of NaCl-CO2-H2O inclusions. The ore-forming hydrothermal fluids are rich in CO2, N2, Na +, K +, Cl- and SO2-4, while the ore-forming elements are characterized by the combination of Au-As-Ag-Sb. The ore-forming hydrothermal fluids are low-salinity fluids with salinities of 4.1wt% ~ 6.3wt% NaCl, densities of 0.88 ~ 0.80g / cm3, fO2 of 10-35 ~ 10-31Pa , Eh 0.60 ~ 0.80eV, for the reduction of the environment. Gold deposit the best temperature for the 230 ~ 260 ℃. The hydrothermal mineralization of Hatu gold deposit is not a typical magmatic hydrothermal fluid, but rather a hydrothermal late volcano mixed with paleo-atmospheric water. Fluid immiscibility, water-rock reaction and paleo-atmospheric water mixing are the main factors that lead to gold deposition in this area.