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中亚地区发现大量可地浸砂岩型铀矿床引起了我国的重视 ,目前正在积极开展此类型铀矿的找矿工作。我国北西部是寻找类似中亚地区层间氧化带后生地浸砂岩型铀矿床最理想的地区 ,本文在论述了区域大地构造特征、地壳演化与区域铀成矿带形成的基础上 ,着重阐明了区域中新生代盆地地浸砂岩型铀矿床形成的铀源条件、盆地类型与结构及富铀性对形成地浸砂岩型铀矿的影响 ;并以区内已有层间氧化带地浸砂岩型铀矿床为例 (伊犁盆地、二连盆地与测老庙盆地砂岩型铀矿床 ) ,论述了盆地砂岩型铀矿床形成的岩相古地理条件、水文地质与层间氧化带发育条件及对铀成矿的影响 ;并阐述了本区层间氧化带地浸砂岩型铀矿床的分布规律
The discovery of a large number of leachable sandstone-type uranium deposits in Central Asia has attracted our attention. At present, the prospecting work for this type of uranium deposits is being actively carried out. In the northwestern part of our country, it is the most ideal area to search for the epikarst sandstone-type uranium deposits similar to the interlayer oxidation zone in Central Asia. Based on the discussion of the regional tectonic features, crustal evolution and the formation of regional uranium metallogenic belt, Uranium source conditions, basin type and structure, and uranium-rich uranium deposit formed by in-situ leaching of sandstone-type uranium deposits in Cenozoic basins in the area are studied. In the area, the in-situ leaching sandstone type Uranium deposit as an example (sandstone-type uranium deposit in Yili basin, Erlian basin and Tiaoliaomiao basin), discussed the lithofacies palaeogeographic conditions, hydrogeological and interlayer oxidation zone development conditions of uranium And the distribution of in-situ leaching sandstone-type uranium deposits in this zone