小秦岭-熊耳山地区金矿成矿的临界-超临界流体

临界-超临界流体对金属矿床，特别是对金矿成矿具有重要作用，对流体包裹体的特征研究表明，小秦岭-熊耳山地区石英脉型，构造蚀变岩型及爆破角砾岩型3种主要类型金矿床的成矿流体属临界-超临界流体，随着成矿作用由深到浅，由高温，高压到低温，低压的演化，临界-超临界流体也逐步演化成中低温非超临界流体，从而使现有的测试结果表明，目前只有少部分为超临界包裹体，大部分为非超临界包裹体。

The critical-supercritical hydrothermal fluid of gold mineralization in the Xiaoqinling to Xiong'er shan areas

The critical-supercritical hydrothermal fluid has an important role during the ore-forming processes of metallic deposits. The study of characteristics of inclusions in hydrothermal fluid shows that the ore-forming hydrothermal fluid of the three main gold deposits types including quartz vein type,altered rock type and explosion breccia type in the Xiaoqinling to Xiong'er shan belong to critical-supercritical hydrothermal fluid. The critical-supercritical hydrothermal fluid evoluted gradually to non-supercritical fluid during the evolution process from high temperature and high pressure in deep place to low temperature and low pressure in shallow place. Therefore, only a few inclusions are tested to be surpercritical inclusions, most of them are non-supercritical fluid inclusions.