四川石棉碲矿床碲迁移形式和富集机理探讨

Discussion on Transport Forms and Accumulation Mechanism of Shimian Tellurium Deposit,Sichuan

测定了成矿过程不同阶段形成的包裹体温度、压力及成分,结合实验地球化学和热力学方法,研究了石棉碲矿床成矿热液在成矿过程中的物理化学条件、迁移形式及碲沉淀富集的地球化学机理。结果表明,碲在热液中主要以H2Te、HTe-、Te22-、Te2-的形式迁移,并在Eh升高,pH、fo2、fs2和fTe2降低的情况下富集。

Based on the measurement of the inclusion temperature,pressure and compositions in different ore-forming phases,the physical and chemical conditions,geochemical theory of transport forms and accumulation mechanism in Shimian tellurium deposit were studied by experimental geochemical methods combined with thermodynamic methods.The results showed that tellurium in the hydrothermal solution transported in forms of H2Te、HTe-、Te2-2、Te2-,and accumulated in the conditions of Eh incresing and pH、fo2,f s2and f Te2 d...