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对地表铁帽或矿石矿物的铅进行铅同位素分析.可以找到矿床并查明其成因.成果的推断解释取决于异常铅与普通锅的识别及其成因关系与空间分布.在研究矿床成因方面,主要用途是确定矿石中铅的来源并估计成矿年代.例如,同位素铅证明:密苏里州西南部显生宙方铅矿矿石的铅来自寒武纪砂岩含水层,部分可能来自前寒武纪基底和古生代碳酸岩母岩;爱达荷州克达伦地区的矿石年代是前寒武纪,并非过去认为的新生代.铅有三种兹射性同位素,具有高的原子量(对天然的、依赖质量的分馏方法不灵
Lead isotope analysis of lead in surface iron cap or ore minerals can find the deposit and find out its cause.The reasoning interpretation of the result depends on the identification of lead and ordinary pot and its genetic relationship and spatial distribution.For the study of the genesis of the deposit, The main purpose is to determine the source of lead in the ore and to estimate the age of the mineralization.For example, isotope lead shows that the Pb in the Phanerozoic galena ore in southwestern Missouri is derived from the Cambrian sandstone aquifer and partly from the Precambrian basement And the Paleozoic carbonatite parent rocks; the ore age in the Kathalun area of Idaho is Precambrian and not a prior generation of Cenozoic. The lead has three radioactive isotopes with high atomic weights (natural, mass-dependent Fractionation method is not working