运用铀同位素研究砂岩型铀矿的几个问题

通过砂岩铀矿矿卷前锋铀同位素特征和512矿床含矿层铀同位素特征的研究，对砂岩型铀矿形成过程、铀同位素找矿标志进行了讨论。研究结果表明，砂岩铀矿的形成是一个多期次、滚动式、由氧化向还原环境推进的动态成矿过程，矿体主要定位于Ⅲ区段。根据铀同位素样品在不同氧化还原分带中的分布和矿体的滚动性特征，认为A区定名为地球化学矛盾区更为恰当。

The Discussions on Some Problems of Sandstone Type Uranium Ore by Using Uranium Isotopes

Based on the studies of uranium isotope characteristics in the front of ore roll and uranium bearing layer in the 512 deposits, the forming processes and ore prospecting markers of uranium isotopes are discussed. The results indicate that the forming process of the sandstone type uranium deposit is a multi phase rolling dynamic process from oxidation to reduction environment. The uranium ore body is mainly located in the sector Ⅲ. It is reasonable that the sector A should be named as the geochemical conflict sector according to the distributions of uranium isotope samples in the different oxidation-reduction zones and rolling features of forming process of the ore body.