矿床成矿地质条件及勘探潜力分析
摘要]钱家店铀矿床赋存于开鲁盆地上白垩统姚家组辫状河流相沉积体系中,论文经过对矿床铀矿化特征、成矿地质条件及成因机理的研究,论文认为其成矿类型归属于层间氧化带砂岩型。

该矿床铀源丰富,有适宜的水文地质条件,平缓西倾的单斜地层和贯通的深大断裂,以及发育良好的辫状河流相砂体,这些都为铀矿床的形成提供了良好条件。

姚家组地层中还原组分含量相对较高,局部形成了有利于铀富集的地球化学障。

泥-砂-泥岩石组合及油气提供的还原环境,对铀矿床的形成及保矿起到一定作用。

近期,在钱家店凹陷北段和中部地区又有新的铀矿化发现,极大提升了该区的勘探潜力,已成为矿床今后勘探的重点区块。

[关键词]开鲁盆地;钱家店铀矿床;成矿地质条件;成矿机理;勘探潜力Geological setting and exploration potentialof Qianjiadian uranium deposit in Kailu basin
Abstract:Qianjiandian uranium deposit occurs in the sediments of braided river system inYaojia forma-tion of Upper Cretaceous in Kailu basinResearches on mineralization features, metallogenic geology andgenesis found that the deposit falls into interlayer oxidazed sandstone typeThe deposit was formed withrichful uranium source, suitable hydrologic condition, monocline strata gently tilted westward, deeplypenetrated fault and well devoloped sandbody of braided river facesDue to the high content reductant inYaojia formation, local geochemical barrier was formed to foster uranium mineralizationAquifer of mud-stone-sandtone-mudstone combination and reductant environment caused by oil-gas play an positive role tothe formmation and reservation of uranium mineralizationRecent discovery in the north and centre part ofQianjiadian depression has greatly increased the exploration potential in this area.。