中文摘要：

蒙其古尔铀矿床是伊犁盆地南缘可地浸砂岩型铀矿田的重要组成部分,属于多控矿成因矿床。在分析该矿床三工河组砂体特征的基础上,结合室内普通薄片镜下鉴定成果与矿体的空间展布特征,讨论了砂体特征与铀成矿的关系,得出以下结论:1在铀成矿过程中,稳定的砂体提供了有利的环境;2较好的泥-砂-泥结构有利于层间水的形成和迳流,是砂岩型铀矿成矿的有利相区;3砂体厚度急剧变薄、泥质夹层增多、砂岩粒度由粗突然变细等沉积微相引起的砂体构型变化对矿体的沉淀富集有明显的控制作用;4铀矿体主要赋存于孔隙度较高、渗透性较好的长石岩屑类粗砂岩、砂砾岩和中砂岩中,成矿最佳的粒度为粗砂岩。上述结论对于区内铀矿找矿工作有一定的参考价值。

英文摘要：

The Mengqiguer uranium deposit is an important part of in-situ leachable sandstone-type uranium orefields in the southern margin of Yili basin,it belongs to the multiple ore-controlling factors deposits.Based on analyzing the characteristics of the sand-body in Sangonghe formation of the Mengqiguer uranium deposit,combined with the microscope identification results and spatial distribution characteristics of the ore-bodies,the relationship between the sand-body characteristics and uranium min-eralization of the Songgonghe formation of the Mengqiguer uranium deposit is researched,the following conclusions are obtained:①in the uranium mineralization process,the favorable environment is provided by the stable sand-body;②the preferable mud-sand-mud structure is conducive to the formation of inter-layer and runoff,it is the favorable facies zone of the ore-forming of sandstone-type uranium deposit;③the changes of sand-body configuration caused by the sedimentary microfacies of the sand-body thickness changed drastically,increasing of the muddy intercalation and the changing of the sandstone grain size from coarse to fine suddenly has obvious control effects on the precipitation and enrichment of the ore-bodies;④the uranium ore-bodies are mainly hosted in the feldspar lithic types of coarse sandstone,sand-y conglomerate and medium sandstone with the characteristics of high porosity and good permeability,the best particle size of mineralization of coarse sandstone.The above conclusions have some reference for the prospecting work of the uranium deposit in the mining area.