通过对桂北地区硫铁矿的铅、硫同位素进行计算和分析,认为该区硫铁矿的物质是多来源,多成因,多阶段演化的结果。推测成矿时代为海西—印支期,以印支期为主;硫源主要来自于同时代沉积的硫酸盐细菌还原作用;同一矿区中,铅、硫同位素组成相似,二者物质来源和成因一致。 Based on the calculation and analysis of lead and sulfur isotopes in pyrite in northern Guangxi, it is concluded that the pyrite in this area is the result of multi-source, multi-genesis and multi-stage evolution. It is speculated that the mineralization age is Hercynian-Indosinian, with the Indosinian as the main phase. The sulfur source mainly comes from the reduction of sulphate bacteria deposited in the same period. The isotopic compositions of lead, sulfur in the same mine area are similar, The same reason.