塔里木盆地巴楚隆起上新统砂岩型铀成矿条件及找矿方向  

Metallogenic Condition and Prospecting Direction of Sandstone-type Uranium Deposit in Pliocene of Bachu Uplift,Tarim Basin

作　　者：杨烨 许强[1,2,3] 李娟 孙祥 姜雅怡[1,2,3] YANG Ye;XU Qiang;LI Juan;SUN Xiang;JIANG Yayi(National Key Laboratory of Uranium Resource Exploration-Mining and Nuclear Remote Sensing,Beijing 100029,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China;CNNC Key Laboratory of Uranium Resource Exploration and Evaluation Techniques,Beijing 100029,China)

机构地区：[1]铀资源探采与核遥感全国重点实验室,北京100029 [2]核工业北京地质研究院,北京100029 [3]中核集团铀资源勘查与评价技术重点实验室,北京100029

出　　处：《铀矿地质》2024年第5期837-849,共13页Uranium Geology

基　　金：塔里木盆地项目(编号:地HTLM2101)资助。

摘　　要：为明确巴楚隆起上新统砂岩型铀矿找矿方向,文章通过研究构造、断裂、岩性及岩石地球化学、沉积相和砂体、外部铀源、地层含铀性、深部铀源等,分析了砂岩型铀成矿条件,指出:巴楚隆起上新统发育构造缓坡,后生氧化作用时间短,原生为红杂色层,外部铀源和地层含铀性差,不利于形成大规模层间氧化带型铀矿。沟通深部烃源岩和上新统的断裂发育,上新统与下伏地层之间为区域性不整合面,断裂和不整合面构成良好的渗出型流体的运移通道。发育后生还原的灰色砂体,为渗出型铀成矿良好的容矿空间;古生界发育富铀烃源岩,为渗出型铀成矿良好的铀源。巴楚隆起渗出型铀成矿条件优于渗入型铀成矿条件,渗出型铀矿为巴楚隆起上新统下一步主要的找矿类型。To clarify the direction of prospecting for sandstone type uranium deposits in Pliocene of the Bachu uplift,the paper analyzed the metallogenic conditions of sandstone type uranium deposit by studying structures,faults,lithology and geochemistry,sedimentary facies and sand bodies,external uranium sources,stratigraphic uranium content,and deep uranium sources.It was pointed out that the Upper Neogene in Bachu uplift developed a gentle structural slope with short time post oxidation,which is not conducive to the formation of large interlayer oxidation zone.Pliocene of Bachu uplift is a red variegated layer with low uranium content,and its external uranium source is not good.Paleozoic rocks of are good uranium sources.Geologic conditions for exudation type uranium mineralization are better than those of Infiltration type.Therefore,exudation type uranium deposits are believed the main prospecting type for the next uranium exploration in the Pliocene of Bachu uplift.

关 键 词：巴楚隆起 上新统 砂岩型铀成矿条件 渗出型铀成矿 

分 类 号：P619.14[天文地球—矿床学]