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一、引言 1979—1982年我院地球化学教研室与河南第一地质调查大队合作,对豫西卢氏—灵宝区域地球化学特征进行了研究,工作中发现东秦岭钼矿带“正常铅”铅同位素组成所显示的年龄与含铅矿物实际生成年龄相矛盾,应用简单封闭体系铅同位素演化的模式难以圆满解释。多伊（B.R.Doe,et al.,1979）指出,显生代尤其是中、新生代铅的同位素组成特征应为地质环境与铅、铀和钍地球化学演化的综合结果。循其思想与方法,我们重新整理了原有资料,本文依据铅同位素组成特征对东秦岭钼矿带的成因和区域构造环境进行了初步探讨。
I. Introduction During 1979-1982, the geochemistry department of our hospital cooperated with the first geological investigation unit in Henan Province to study the geochemical characteristics of the Lushi-Lingbao area in western Henan Province. During the work, the “normal lead” lead Isotope composition shows the age of the actual generation of lead-containing minerals and contradictory, the application of simple closed-end system of lead isotope evolution model is difficult to satisfactorily explain. B. Doherty et al. (1979) pointed out that the isotopic composition of the Mesozoic and especially the Mesozoic and Cenozoic lead should be the integrated result of the geochemical environment and the geochemical evolution of lead, uranium and thorium. Based on our thoughts and methods, we have reorganized the original data. Based on the characteristics of lead isotopes, we have made a preliminary study of the genesis and regional tectonic environment of the East Qinling molybdenum belt.