鄂尔多斯盆地东南缘含煤区砂岩型铀矿成矿条件

为了探讨鄂尔多斯盆地东南缘含煤区砂岩型铀矿成矿地质条件，通过分析该地区地质特征、构造、水文、地层-岩相及铀源等特征，采用资料收集、镜下鉴定、煤田资料筛查、地质编图等方法进行探讨。综合分析认为:鄂尔多斯盆地东南缘中侏罗统直罗组下段放射性异常发育，为主要找矿目的层；控矿构造有利，泥-砂-泥地层结构完整，水动力条件完善，铀源丰富。结合已有钻探验证发现工业矿体，说明该地区砂岩型铀矿成矿地质条件优越，铀成矿潜力较大。 

Metallogenic conditions of sandstone uranium deposits in the coal-bearing area on the southeastern margin of Ordos basin

In order to study the metallogenic geological conditions of sandstone uranium deposits in the coal-bearing area in the southeastern margin of Ordos basin, the geological characteristics, structure, hydrology, strata lithofacies and uranium source of the area were analyzed, and the methods of data collection, microscopic identification, coal field data screening and geological mapping were adopted. Comprehensive analysis shows that the lower part of the Zhiluo Formation of Middle Jurassic in the southeastern margin of Ordos basin is characterized by abnormal development of radioactivity and is the main target bed for prospecting; the ore-controlling structure is favorable, the mud-sand-mud stratum structure is complete, the hydrodynamic condition is perfect, and the uranium source is abundant. Combined with the existing drilling verification, the sandstone uranium mineralization in this area is proved. The ore geological conditions are superior and uranium prospecting potential is large.