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本文针对甘肃白银金属硫化物矿床长期争论的成矿时代问题，运用成因矿物学的方法，在对各采样点内锆石的标型特征、变生状态进行详细分类研究的基础上，采用锆石U－Pb同位素定年手段，测得成矿时代为464～440Ma，属加里东成矿期。同时结合矿区外围地层和岩体的同位素年代学研究，讨论了白银地区岩浆活动及主要地质事件的演化过程。
In this paper, according to the long controversial metallogenic epoch of Gansu silver-silver metallogenic sulfide deposits, by using the method of genetic mineralogy, based on the detailed classification of the zircons’ U-Pb isotopic dating means that the ore-forming age is 464 ~ 440Ma, belonging to Caledonian metallogenic stage. Based on the isotopic geochronology of the strata and rock mass outside the mining area, the magmatic activity and the evolution of major geological events in the Baiyin area are discussed.