【摘要】 <正> 一、前言 热液系统中形成的含硫矿物的硫同位素组成直接反映了热液的硫同位素组成。因而根据矿物的同位素比值可以推断矿床成因。 1968年酒井均(H.Sakai)首先对这一前提提出异议,他指出热液的温度和酸碱度可以影响硫化物的硫同位素组成。1972年大本弘(Ohmoto)系统论证了热液物理化学更多还原

【Abstract】 According to Sakai-Ohmoto ’s theory regarding the evolution of sulfur isotope in hydrothermal system, by using new data on chemical reaction equilibrium constants, equilibrium isotopic fractionation factors as well as on individual ion activity coefficients of sulfur species the following diagrams of lgfo2-pH are constructed:a)Mole fraction of aqueous sulfur species (Xi),b)Stable field for Some minerals in Pe-S-O system,c)diagram depicting the rate of oxidation-reduction state of aqueous sulfur species (R’), andd)Isotopic composition of sulfur compounds更多还原