摘要
The Mengqiguer area lies between the tectonically active region in the east and stable region in the west of the Yili Basin.The Shuixigou Group of Lower-Middle Jurassic is the uranium-hosting formation of in-situ leachable sandstone-type uranium deposits in this area.It has a fairly good prospect to explore uranium ore.In combination with indoor work and previous studies,the component of clastic grains,lithogenesis and structure of the Mengqiguer sandstones are studied in detail.Moreover,the epigenetic uranium mineralization and source area are also analyzed comprehensively.The result indicates that both the compositional maturity and the textural maturity of this sandstone are relatively low,and the diagenesis is intensive.