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本文系统地介绍了俄罗斯 3个具有工业意义的古河道型铀矿化发育区 (外乌拉尔、西西伯利亚和外贝加尔 )的地质背景、铀矿化特征和铀成矿条件 ,指出切割到基底中的古河道型铀矿床 ,既可产于跨地区的造山带周围 ,也可产于活化的年青地台和古老地盾 ;既可形成于干燥的气候条件 ,也可形成于潮湿的气候条件。古河道型铀矿化可以从含矿层的沉积开始一直延续到被泥岩层或玄武岩层完全封盖。古河道的后成氧化分带有两种形式 :氧化带 铀矿化带 原生灰色岩石 ;氧化带 氧化铁再沉积带 漂白带 原生灰色岩石。古河道型铀矿床具宽广的元素谱 ,这主要是与含矿围岩富含有机质和在氧化带尖灭处存在各种地球化学障有关
This paper systematically introduces the geological background, uranium mineralization characteristics and uranium metallogenic conditions of three industrialized uranium mineralized areas (outer Ural, Western Siberia and Outer Baikal) with significance in Russia. It is pointed out that cutting into the basement Ancient river-type uranium deposits, can be produced around the orogenic belt around the region can also be produced in the activated young platform and the ancient shield; can be formed in dry climatic conditions, can also be formed in humid climatic conditions. Paleocontinental uranium mineralization can continue from the sedimentation of the ore-bearing formation until it is fully capped by mudstone or basalts. There are two forms of post-oxidation oxidation in ancient rivers: oxidized uranium mineralization belt, primary gray rock, oxidized iron oxide re-deposition zone, bleached zone primary gray rock. The paleo-channel uranium deposit has a broad elemental spectrum, which is mainly related to the rich organic matter in the ore-bearing wall rocks and the existence of various geochemical barriers at the pinnacle of the oxidation zone