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本文以研究华北地台东北部前寒武纪地壳演化为基础,阐明了该区不同地质构造单元中铀的分布与富集规律。根据铀矿化与铀源体的空间分布关系、硫同位素组成、稀上元素分布模式及同位素年龄等资料,论述了该区前寒武纪铀成矿作用具有同源性相多阶段复成因的特点。在此基础上,提出了铀成矿旋回的概念,并将华北地台东北部前寒武纪构造区存在的铀矿化划分为晚太古代、早元古代和中-晚元古代三个成矿旋回。
Based on the study of the Precambrian crustal evolution in the northeastern North China Platform, this paper clarifies the distribution and enrichment of uranium in different geological tectonic units in this area. Based on the spatial distribution of uranium mineralization and uranium source, the composition of sulfur isotopes, the distribution patterns of dilute upper elements and the age of isotopes, the characteristics of multiphase complex genesis of the homology of Precambrian uranium mineralization are discussed. On this basis, the concept of uranium metallogenic cycle is proposed, and the uranium mineralization existing in the Precambrian tectonic zone in the northeastern North China Platform is divided into three types: Late Archean, Early Proterozoic and Middle-Late Proterozoic Mine spin back.