库车坳陷日达里克地区铀成矿控矿要素与成因分析

Analysis on the Ore-controlling Factors and Genesis of Uranium Mineralization in the Ridalik Area of the Kuqa Depression

塔里木盆地日达里克地区上新统库车组存在较大的砂岩型铀矿成矿潜力。笔者按照水成铀矿基本理论,充分运用和研究野外地质调查、钻孔资料和微观地球化学等第一手资料,系统总结了区内基本地质条件和铀矿化特征,重点分析了与铀成矿相关的岩性岩相、构造、还原介质以及层间氧化带含矿性等控矿要素,并对铀矿成因和成矿类型进行尝试性探讨,初步分析认为日达里克地区上新统库车组铀矿化与层间氧化带密切相关。

The Pliocene Kuqa Formation in Ridalik area of Tarim Basin has a great potential for sandstone type uranium mineralization.According to the basic theory of hydrogenic uranium deposits,this paper makes full use of and studies the first-hand data such as field geological survey,borehole data and micro-geochemistry,systematically summarizes the basic geological conditions and characteristics of uranium mineralization in the area,focuses on the analysis of the ore-control factors related to uranium mineralization,such as lithology,lithofacies,structure,reducing medium and interlayer oxidation zone ore-bearing property,and makes a tentative discussion on the genesis and mineralization type of uranium deposits,The preliminary analysis shows that the uranium mineralization of the Pliocene Kuqa Formation is closely related to the interlayer oxidation zone.