世界核地质科学2025，Vol.42Issue(5)：974-987,14.DOI:10.3969/j.issn.1672-0636.2025.05.006
银额盆地测老庙铀矿床成矿特征及成矿模式
Mineralization characteristics and model of Celaomiao uranium deposit in Yingen-Ejin basin
摘要
Abstract
Celaomiao uranium deposit is one of the two uranium deposits discovered in the Yingen-Ejin basin,with a complex mineralization process.Defining its mineralization characteristics and mineralization model is of great significance for advancing the research on uranium mineralization theory and guiding uranium prospecting and exploration in Yingen-Ejin basin.Based on the summary of previous studies on the geological characteristics and metallogenic conditions of Celaomiao uranium deposit,a comprehensive research was conducted on its ore-controlling factors,genetic mechanism,and metallogenic model.The results indicate that the main uranium-bearing horizons(the middle and upper members of the Bayingobi formation)in Celaomiao uranium deposit developed alluvial fan-fan delta-lacustrine sediments sequentially from the periphery to the center of the depression.Favorable uranium metallogenic locations are distributed in areas with well-developed sand bodies or enriched reducing media,including the braided channels,inter-fan areas,and fan-edge depressions in the middle part of alluvial fans;distributary channels in fan delta plains;subaqueous distributary channels in fan delta fronts;and shore-shallow lacustrine facies.Uranium mineralization is jointly controlled by uranium sources,structures,and reducing media.The uranium sources are mainly derived from the Caledonian.Variscan granites and the Mesoproterozoic Zhartai group on the southeastern margin of the depression;the uranium deposit occurs in special positions of faults and folds;and uranium mineralization is closely associated with carbonaceous debris.Uranium metallogenesis is characterized by multi-stage and multi-period processes,involving sedimentary pre-enrichment metallogenesis in the middle Early Cretaceous,hydrothermal transformation in the late Early Cretaceous,and supergene leaching metallogenesis after the Paleogene.Accordingly,a superimposed polygenetic uranium metallogenic model for the Celaomiao uranium deposit has been established.关键词
成矿特征/矿床成因/成矿模式/测老庙铀矿床/银额盆地Key words
mineralization characteristics/deposit genesis/mineralization model/Celaomiao uranium deposit/Yingen-Ejin basin分类
天文与地球科学引用本文复制引用
刘政国,秦彦伟,李伟涛,董续舒,李鹏,李天瑜,叶茂..银额盆地测老庙铀矿床成矿特征及成矿模式[J].世界核地质科学,2025,42(5):974-987,14.基金项目
核技术研发项目(编号:地H2401)资助 Supported by Nuclear Technology R&D Program(No.H2401) （编号:地H2401）
