本文用具体实例简述了在灰色透水层中的表生分带性,并指出在该带中铀矿化的位置。研究了铀从层间水中沉淀而形成的再生铀黑的形成条件,比较了再生铀黑和沥青铀矿的特点,并提出它们的化学成分相同性的概念。 In this paper, the epigenetic zonation in the gray water-permeable layer is briefly described with the specific examples, and the location of uranium mineralization in this zone is pointed out. The formation conditions of reclaimed uranium black formed by precipitation of uranium from interlayer water were studied. The characteristics of reclaimed uranium black and uraninite were compared and their concepts of chemical compositional identities were proposed.