Abstract Since the Bayanwula uranium deposit was discovered, several paleochannel sandstone-type uranium deposits have been found in the Manite and Wulanchabu sub-basins of the Erlian Basin. The paleochannel sandstone-type uranium deposits in the Erlian Basin represent important uranium sources in North China. The regional geological settings, depositional facies and sequences, ore-bearing sand bodies and uranium source rocks (e.g., granite and sandstones), play important roles in the formation of these deposits. Three styles of paleochannel sandstone-type uranium deposits occur in the Erlian Basin: 1) interlayer oxidation-style deposit hosted in the braided river sand bodies of the Saihan Formation and characterized by laterally zoned mineralization; 2) phreatic oxidation -style deposits hosted in meandering river sand bodies of the Saihan Formation, showing vertically zoned oxidized mineralization; 3) superimposed mineralization -style deposits hosted in braided river sand bodies of the Saihan Formation, characterized by an oxidized zone from fluvial channel center to margin, which was then overprinted by hydrothermal fluids. These three styles of the uranium deposits depend on depositional microfacies and development of deep-seated faults, which can be used to locate the mineralization and exploration targets within the Erlian Basin.

中文翻译：

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华北二连盆地古河道砂岩型铀矿成因模式及勘探意义——综述与比较研究

摘要 巴彦乌拉铀矿床自发现以来，在二连盆地马尼特亚盆地和乌兰察布亚盆地发现了多处古河道砂岩型铀矿床。二连盆地古河道砂岩型铀矿床是华北地区重要的铀矿源。区域地质背景、沉积相和层序、含矿砂体和铀源岩（如花岗岩和砂岩）在这些矿床的形成中起着重要作用。二连盆地发育3种古河道砂岩型铀矿床：1）层间氧化型矿床，赋存于赛罕组辫状河砂体，以横向分带成矿为特征；2）赛罕组曲流河砂体潜流氧化型矿床，呈垂直分带氧化成矿；3) 赛罕组辫状河砂体中的叠合矿化型矿床，其特征是河道中心至边缘为氧化带，随后被热液覆盖。这三种类型的铀矿床依赖于沉积微相和深部断裂的发育，可用于确定二连盆地内的成矿和勘探目标。然后用热液进行套印。这三种类型的铀矿床依赖于沉积微相和深部断层的发育，可用于确定二连盆地内的成矿和勘探目标。然后用热液进行套印。这三种类型的铀矿床依赖于沉积微相和深部断层的发育，可用于确定二连盆地内的成矿和勘探目标。