二连盆地与蒙古沉积盆地砂岩型铀矿成矿条件对比

以砂岩型铀矿成矿理论为指导，以成矿地质背景和成矿基本特征研究为基础，总结了二连盆地和蒙古东南部砂岩型铀矿的主要控矿因素，较系统地对比了二者砂岩型铀矿成矿条件的相似性和差异性。指出二连盆地与蒙古产铀盆地在大地构造属性、盆地类型及规模、铀源、构造演化史和主要控矿因素等方面存在较大相似性，但在产铀层位、后期构造活动性、区域铀矿化显示等方面存在明显差异，根本性差异在于构造活动性和控矿沉积体系两大方面。认为二连盆地与蒙古东南部沉积盆地的产铀潜力大体相当，并提出今后需重视对二连盆地“苏敏河式”铀矿的寻找。

Comparison of metallogenic conditions for sandstone-type uranium deposit between Erlian basin of China and sedimentary basins of Mongolia

Based on the study of metallogenic background and basic metallogenic characteristics, this paper summarizes the main ore-controlling factors of sandstone-type uranium deposits in Erlian basin of China and basins in southeastern Mongolia with the theory of sandstone-type uranium metallogeny, and systematically analyses similarities and differences between the two areas. The general similarities of tectonic attribute, basin type and scale, uranium source, and tectonic evolution in both areas are proposed in this paper, and also their obvious differences in uranium-hosting strata, late tectonic activity and regional uranium mineralization occurrences, especially in tectonic activity and ore-controlling sedimentary system are proposed. The authors believe that the two areas have approximate uranium- productive potentialities, and propose the importence of prospecting ＂Sumin-river model＂ sandstone-type uranium deposit in Erlian basin in the future.