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小秦岭石英脉型金矿矿物包裹体中挥发组分以Ｈ２Ｏ和ＣＯ２为主，还有少量的ＣＨ４、ＣＯ、Ｈ２、Ｈ２Ｓ等。富金矿石中包裹体的ＣＯ２＞３０ｍｏｌ％．ＣＯ２／Ｈ２Ｏ＞０．４，而贫金矿石中包裹体的ＣＯ２＜２０ｍｏｌ％，ＣＯ２／Ｈ２Ｏ＜０．２。前者包裹体的气体成分中含有较多的ＣＨ４、ＣＯ和Ｈ２等还原性气体．表明这种金矿的成矿流体以富含ＣＯ２为特征，ＣＯ２含量的变化对金的富集起着重要作用．因此金矿石中矿物包裹体的ＣＯ２含量或ＣＯ２／Ｈ２Ｏ比值可以作为深部预测的主要判据之一，并应用于小秦岭金矿山已取得良好的效果。
The small-Qinling quartz veins gold mineral inclusions in the volatile components of H2O and CO2-based, there are a small amount of CH4, CO, H2, H2S and so on. CO2 inclusions in gold-rich ores> 30 mol%. CO2 / H2O> 0.4, while the depleted gold ore inclusions CO2 <20mol%, CO2 / H2O <0.2. The former inclusions gas composition contains more CH4, CO and H2 and other reducing gases. It indicates that the ore-forming fluid of this gold deposit is characterized by rich CO2, and the change of CO2 content plays an important role in the enrichment of gold. Therefore, the CO2 content or CO2 / H2O ratio of mineral inclusions in gold ore can be used as one of the main criteria for deep prediction, and has been applied to the small Qinling gold mine has achieved good results.