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本文在对滇西蛇街——紫金山复背斜锑、汞、金、砷多金属矿带地质特征研究的基础上,测定了各矿形成时的包裹体均一温度和压力。作者根据不同的蚀变粘土矿物和矿物共生组合,对锑、汞、金、砷分别成矿的物理化学条件(T、P、PH、fo_2。、fs_2。、fco_2等)进行了热力学计算。结果表明:各矿形成的物理化学条件是不相同的,并且呈现规律的变化趋势,从而造成了锑、汞、金、砷的分异,在蛇街——紫金山复背斜上形成规律的纵向带状分布。这对滇西的找矿工作和锑、汞、金、砷共生分异机理的理论研究均有一定的参考价值。
Based on the study of the geological characteristics of antimony, mercury, gold and arsenic polymetallic ore belts in Snake Street-Zijin Mountain complex in western Yunnan, the homogenization temperature and pressure of inclusions in each ore are measured. The authors calculated thermodynamics of the physico-chemical conditions (T, P, PH, fo_2, fs_2, fco_2, etc.) of the respective mineralization of antimony, mercury, gold and arsenic based on the different intergrowths of altered clay minerals and minerals. The results show that the physical and chemical conditions of each deposit are different, and show a regular trend of variation, resulting in the differentiation of antimony, mercury, gold and arsenic, forming a regular pattern on Snake Street - Zijinshan complex anticline Longitudinal strip distribution. This has certain reference value for the prospecting work in western Yunnan and the theoretical study on the symbiotic differentiation mechanism of antimony, mercury, gold and arsenic.