松辽盆地北部砂岩型铀矿成矿潜力分析  

Mineralization Potential Analysis of Sandstone-Type Uranium Deposits in Northern Songliao Basin

作　　者：李研 聂逢君[1] 王东旭 贾立城[3] 卢胜军 严兆彬[1] 罗敏 刘晓辉 Li Yan;Nie Fengjun;Wang Dongxu;Jia Licheng;Lu Shengjun;Yan Zhaobin;Luo Min;Liu Xiaohui(College of Earth Science,East China University of Technology,Nanchang 330013,China;No.240 Institute of Nuclear Industry,Shenyang 110000,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]东华理工大学地球科学学院,南昌330013 [2]核工业二四○研究所,沈阳110000 [3]核工业北京地质研究院,北京100029

出　　处：《吉林大学学报（地球科学版）》2023年第4期1075-1089,共15页Journal of Jilin University：Earth Science Edition

基　　金：中国核工业地质局项目(202125);国防科工局核能开发项目(20171403)。

摘　　要：松辽盆地南部砂岩型铀矿找矿研究进行了大量的地质工作,并取得了一定成果,与之相比,盆地北部的铀矿地质勘查工作则明显薄弱。本文在松辽盆地北部蚀源区岩石含铀性、盆地构造演化、古气候、地层演化、沉积相展布、砂体发育情况及后生改造等铀成矿条件分析的基础上,评价了松辽盆地北部砂岩型铀矿的成矿潜力,探讨了其找矿方向。综合分析得出:松辽盆地北部整体铀源丰富,成矿条件较好;白垩纪以来,盆地存在4期明显构造反转,形成上白垩统姚家组和四方台组2个主要铀矿找矿目的层;在盆地内部,姚家组和四方台组发育良好的沉积相及砂体条件,局部地区氧化作用明显,氧化带和铀矿化也较为发育,是找矿的重要线索;松辽盆地北部整体铀成矿条件良好,东段应以姚家组为重点找矿层位,西段则应以四方台组为重点找矿层位,找矿类型为层间氧化带型。A lot of geological work has been carried out in the prospecting for sandstone-type uranium deposits in the southern Songliao basin,resulting in significant achievements.In contrast,the geological exploration work for uranium deposits in the northern Songliao basin is currently inadequate.In this paper,based on the analysis of uranium mineralization conditions,such as uranium-bearing rocks,basin tectonic evolution,paleoclimate,stratigraphic evolution,distribution of sedimentary facies,development of sand bodies and epigenetic reformation,etc.,the mineralization potential of sandstone-type uranium deposits in the northern Songliao basin is comprehensively evaluated,and its prospecting direction is discussed.The northern Songliao basin is rich in uranium sources and has good metallogenic conditions.Since the Cretaceous,the basin has experienced four periods of tectonic inversion,forming two main uranium prospecting targets,Upper Cretaceous Yaojia Formation and Sifangtai Formation.Inside the basin,the Yaojia and Sifangtai Formations have well-developed sedimentary facies and sandbody conditions,and the oxidation is noticeable in some areas,and the oxidation zone and uranium mineralization are also relatively developed,providing important clues for ore prospecting.Comprehensive analysis shows that the overall uranium metallogenic conditions are good in the northern Songliao basin,with the Yaojia Formation being the key prospecting strata in the eastern section,and the Sifangtai Formation in the western section.The ore exploration type is interlayer oxidation zone type.

关 键 词：砂岩型铀矿 姚家组 四方台组 反转构造 成矿潜力 层间氧化带 松辽盆地北部 

分 类 号：P612[天文地球—矿床学] P619.14[天文地球—地质学]