北三台地区位于准噶尔盆地东部，主要找矿目的层为新近系沙湾组，属于“三新”找矿思想下新一轮铀矿勘查的重点区域，尽管该地区砂岩型铀矿的成矿条件较为有利，但勘查工作水平总体较低。通过岩心编录、岩矿鉴定、扫描电镜分析、地球化学分析等手段，依据层间氧化带砂岩型铀矿成矿理论，从铀源、构造、岩性-岩相、地下水动力系统、还原条件及后生蚀变等方面综合分析北三台地区沙湾组铀成矿条件。结果表明：北三台地区沙湾组沉积后受构造运动影响较小，地层倾角2° ~ 10°。找矿目的层由扇三角洲沉积的厚层砂岩、砂砾岩组成，可作为良好的铀储层空间。砂岩顶底板具有稳定的泥岩隔水层，具备有利于层间氧化带发育的“泥-砂-泥”垂向结构，此外，深部油气的改造作用，为地层提供了有利的还原条件，具有较好的找矿前景。本区铀矿勘探应优先针对油气发育、断裂、砂体、及后生蚀变发育的区域进行探索查证。

The Beisantai area is situated in the eastern Junggar Basin, where the Neogene Shawan Formation serves as the primary target horizon for uranium exploration. As a key area under the "Three-New" prospecting strategy for the new round of uranium exploration, this region exhibits favorable metallogenic conditions for sandstone-type uranium deposits, though exploration efforts remain relatively underdeveloped. The uranium metallogenic conditions of the Shawan Formation were comprehensively analyzed through core logging, petrographic identification, scanning electron microscopy, and geochemical analysis, guided by the metallogenic theory of interlayer oxidation zone sandstone-type uranium deposits. The investigation focused on uranium sources, tectonic setting, lithologylithofacies characteristics, groundwater dynamics, redox conditions, and epigenetic alterations. The results show that the Shawan Formation in Beisantai has experienced minimal tectonic modification post-deposition, with formation dip angles ranging between 2° and 10°. The target horizon comprises thick sandstones and sandy conglomerates of fan-delta origin, providing favorable reservoir space for uranium mineralization. The stable mudstone aquicludes overlying and underlying the sandstone units create a "mud-sand-mud" vertical configuration conducive to interlayer oxidation zone development. Furthermore, hydrocarbon alteration from deep petroleum systems enhances reducing conditions within the strata, demonstrating significant prospecting potential. Exploration priorities should focus on areas with hydrocarbon enrichment, fault systems, sand bodies, and epigenetic alteration development.