昭苏盆地砂岩型铀矿成矿条件分析——昭苏盆地与伊犁盆地对比

Analysis on ore-formation conditions of sandstone-type uranium deposits in Zhaosu Basin——Comparison between Zhaosu Basin and Yili Basin

通过比较昭苏盆地与伊犁盆地的构造,中、新生代地层,铀源,铀矿点分布,岩相古地理和现代地貌等6个方面的差异性,初步认为昭苏盆地断裂构造复杂,盖层剥蚀严重,中、新生代分布范围小,不具备形成大型铀矿床的条件。在昭苏盆地找矿的重点应放在盆地北部,突破口可能是北东部吾尔塔木斯河出山口外围,目的层是侏罗系水西沟群。

Through the comparison of Zhaosu Basin and Yili Basin in aspects of tectonics, Mesozoic and Cenozoic strata, uranium source, distribution of uranium mineralization, lithofacies, palaeogeography and modern geomorphology, etc., it is suggested that Zhaosu Basin has unfavorable conditions for forming large uranium deposits, due to its complicated fault structures, serious erosion of the cover and the limited distribution of Mesozoic and Cenozoic strata. The prospecting target should be focused on the northern Zhaosu Basin. The possible breakthrough area should be at the periphery of the outlet of Wuertamusi River and the target horizon should be the Shuixigou Group, Jurassic.