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流体包裹体研究表明，纳沃日金矿成矿脉体中流体包裹体类型有三种，富ＣＨ４、ＣＨ４－ＣＯ２－Ｈ２Ｏ和富Ｈ２Ｏ包裹体。初始成矿流体是富ＣＨ４热液，在主矿化阶段，另一来源的ＣＯ２－Ｈ２Ｏ流体与ＣＨ４流体发生了不均匀混合，并且在石英－磁黄铁矿阶段最为强烈，造成不同矿化部位的ｘＣＨ４变化极大，早期近于纯ＣＨ４流体被充分“稀释”后，石英－黄铁矿阶段的ｘＣＨ４显著减小，到成矿晚期只剩ＣＯ２－Ｈ２Ｏ流体。正是由于不同性质流体的混合，造成热液的ｐＨ及ｆｏ２的升高，流体中的金－硫络合物分解，金沉淀成矿。
Fluid inclusion studies show that there are three types of fluid inclusions in the ore-bearing veins of the Navajirui gold deposit, rich in CH4, CH4-CO2-H2O and rich in H2O inclusions. The initial ore-forming fluid is rich in CH4 hydrothermal. During the main mineralization stage, the CO2-H2O fluid from another source is heterogeneously mixed with CH4 fluid and is most intense in the quartz-pyrrhotite stage, resulting in different mineralization sites The xCH4 in the quartz-pyrite stage is significantly lower than that of the pure CH4 fluid in the early stage, and only CO2-H2O fluid remains in the late stage of metallogenesis. It is because of the different nature of the fluid mixture, resulting in hydrothermal pH and fo2 rise, the fluid decomposition of gold - sulfur complexes, gold precipitation mineralization.