摘要
根据该矿床铅、硫同位素提供的信息,铅主要来源于地幔,但仍受地壳铅的混染,属以正常铅为主的混合型铅;硫主要来源于沉积盆地硫酸盐的细菌还原作用;矿床由深源卤水成矿作用形成,可以划分为两个成矿阶段,即早期高μ值铅相对富轻硫型铅锌矿成矿作用和晚期低μ值铅相对贫轻硫型铅锌矿成矿作用阶段。
Pb and S isotope data show that Pb in the Lanping Pb-Zn deposit was derived mainly from the mantle, although it was contaminated by crustal lead. It belongs to mixed lead composed mainly of normal lead. Sulfur was derived mainly from bacterial reduction of sulphates in sedimentary basins. The formation of the mineral deposit is ascribed to deep-seated brines, and may have involved two mineralization stages, i.e., the early stage at which light sulfur with a higher μ value is relatively enriched and the late stage at which light sulfur with a lower μ value is relatively depleted in Pb-Zn mineralization.
出处
《地球化学》
CAS
CSCD
北大核心
1992年第2期141-148,共8页
Geochimica
