水岩体系Eh—pH法在砂岩型铀矿层间氧化带划分中的应用——以新疆伊犁盆地512铀矿床为例

512铀矿床层间氧化带水岩体系Eh和pH值的研究结果表明，层间氧化带内相同亚带的水岩体系Eh和pH平均值极为接近，而不同亚带的水岩体系Eh值具有明显差异，即从氧化带到还原带，水岩体系Eh值明显下降；层间氧化带内不同亚带的水岩体系pH值也有所不同，氧化带和还原带处于弱碱性介质环境，而氧化带还原过滤带则处于中性介质环境；水岩体系Eh和pH值可以作为划分层间氧化带和圈定铀矿体位置的依据。

Application of the Water-Rock System Eh-Ph Method to the Division of the Interlayer Oxidation Zone in the Sandstone Type Uranium Ore: Exemplified by No.512 Uranium Deposit, Yili Basin, Xinjiang

Studies on the application of water-rock system E h and pH values to the interlayer oxidation zone of No.512 uranium deposit show that the water-rock system E h mean values are very close to each other in the same subzone of the interlayer oxidation zone, while the water-rock system E h values are obviously different in different subzones of the interlayer oxidation zone, i.e., from the oxidation zone to the reduction zone, the water-rock system E h values clearly decrease. The water-rock system pH values are somewhat different in different subzones of the interlayer oxidation zone, i.e., the oxidation and reduction zones are in an environment of weakly alkali media whereas the reduction-oxidation transitional zone is in the setting of neutral media. The water-rock system E h and pH values can be regarded as the evidence for dividing the interlayer oxidation zone and delineating the uranium orebodies.