世界核地质科学2025，Vol.42Issue(5)：943-957,15.DOI:10.3969/j.issn.1672-0636.2025.05.004
银额盆地苏红图地区铀矿化特征与成矿作用
Uranium mineralization and metallogenesis of Suhongtu area in Yingen-Ejin basin
摘要
Abstract
Yingen-Ejin basin is an important sedimentary basins in northern China.In recent years,profitable sandstone-type uranium mineralization has been discovered in loose rocks of the Suhongtu formation of the Suhongtu area,marking a breakthrough in prospecting.This study elucidated the characteristics and metallogenic mechanisms of uranium mineralization in this region through petrographic,mineralogical,geochemical analyses,and metallogenic age determination.The ore-hosted stratum is the lower section of the Suhongtu formation(K1s1),characterized by a depositional system of alluvial fan-fan delta-lacustrine facies,with uranium mineralization concentrated in paleochannel deposits at the basin margin.Uranium primarily occurs as uranium minerals(mainly pitchblende),closely associated with pyrite,clay minerals,anatase,and carbonized plant debris.Geochemical analysis indicates a strong correlation between uranium enrichment and redox-sensitive elements(e.g.V,Co,Ni,Mo).U-Pb isotopic dating suggests a metallogenic age of 93±13 Ma(Late Cretaceous).Comprehensive analysis shows that the uranium deposit is a basement paleochannel type,with interlayer oxidation as the primary metallogenic process.The key controlling factors include basement paleochannels,primary gray sandstone,and secondary oxidation zones.关键词
银额盆地/苏红图地区/砂岩型铀矿/铀矿化特征/层间氧化作用Key words
Yingen-Ejin basin/Suhongtu area/sandston-type uranium deposit/uranium mineralization/interlayer oxidation分类
天文与地球科学引用本文复制引用
李伟涛,刘武生,贾立城,李鹏..银额盆地苏红图地区铀矿化特征与成矿作用[J].世界核地质科学,2025,42(5):943-957,15.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.地H2401) （编号:地H2401）
