开鲁盆地钱家店铀矿床成矿地质条件及勘探潜力分析  

Geological setting and exploration potential of Qianjiadian uranium deposit in Kailu basin

作　　者：郑纪伟[1] 

机构地区：[1]辽河石油勘探局通辽铀矿,辽宁盘锦124010

出　　处：《铀矿地质》2010年第4期193-200,207,共9页Uranium Geology

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,经过对矿床铀矿化特征、成矿地质条件及成因机理的研究,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。Qianjiandian uranium deposit occurs in the sediments of braided river system inYaojia formation of Upper Cretaceous in Kailu basin.Researches on mineralization features,metallogenic geology and genesis found that the deposit falls into interlayer oxidazed sandstone type.The deposit was formed with richful uranium source,suitable hydrologic condition,monocline strata gently tilted westward,deeply penetrated fault and well devoloped sandbody of braided river faces.Due to the high content reductant in Yaojia formation,local geochemical barrier was formed to foster uranium mineralization.Aquifer of mudstone-sandtone-mudstone combination and reductant environment caused by oil-gas play an positive role to the formmation and reservation of uranium mineralization.Recent discovery in the north and centre part of Qianjiadian depression has greatly increased the exploration potential in this area.

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 

分 类 号：P612[天文地球—矿床学]