巴丹吉林盆地路井凹陷铀成矿条件分析及找矿方向探讨  

Analysis of Uranium Metallogenic Conditions and Prospection Direction in Lujing Sag,Badan Jaran Basin

作　　者：罗森森 牛霆 孟龙 王刚 刘武生[2] 纪宏伟 孟秋熠 LUO Senen;NIU Ting;MENG Long;WANG Gang;LIU Wusheng;JI Hongwei;MENG Qiuyi(Research Institute No.203,CNNC,Xi’an,Shaanxi 710086,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China;Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]核工业二〇三研究所,陕西西安710086 [2]核工业北京地质研究院,北京100029 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《铀矿地质》2024年第1期157-170,共14页Uranium Geology

基　　金：中国核工业地勘基金项目“巴丹吉林盆地及周缘铀矿资源调查评价”(编号:2022-21);中核集团集中研发项目“砂岩型铀矿多重耦合地质成矿作用与时空定位”(编号:中核科发2021-143号)联合资助。

摘　　要：为了分析巴丹吉林盆地路井凹陷构造、建造、改造及铀矿化特征,文章通过对路井凹陷的铀源、构造演化、古气候环境、水文地质、目的层岩性-岩相、后生蚀变及铀矿化特征进行系统分析,探讨找矿方向及找矿类型,圈定重点找矿层位,以此来指导巴丹吉林盆地及周缘找矿。研究表明,路井凹陷铀源丰富,目的层发育泥-砂-泥结构,地下水补-径-排体系完整,层间氧化带发育,具备砂岩型铀成矿条件。结合目前钻孔揭露的铀矿化线索,证实路井凹陷具备铀成矿潜力和找矿空间,确定下白垩统苏红图组作为主攻找矿层位,兼顾下白垩统巴音戈壁组。苏红图组找矿部位以河道翼部为主,寻找潜水-层间氧化带型铀矿;巴音戈壁组找矿部位以扇三角洲前缘为主,寻找潜水氧化-同沉积型铀矿。In order to explore the prospecting direction and type of ore uranium depost and guide ore uranium depost in the Badan Jaran Basin and its surrounding areas,this paper delineated the key ore exploration horizons by analyzing the structure,sedimentary construction,and uranium mineralization and transformation characteristics of the Lujing Sag in the Badan Jaran Basin.Through systematic analysis of uranium source,tectonic evolution,paleoclimate environment,hydrogeology,lithology of target layer,epigenetic alteration and uranium mineralization characteristics,It was considered that the Lujing Sag was rich in uranium sources,the target layer developed mud-sand-mud structure,groundwater recharge-run off-discharge system,and the interlayer oxidation zone was well developed,which laid the prerequisites for sandstone type uranium mineralization.Combined with the uranium mineralization clues revealed in the current borehole,it is confirmed that the Lujing Sag has uranium mineralization potential and prospecting space.The main prospecting horizon is Lower Cretaceous Suhongtu Formation,and Lower Cretaceous Bayingebi Formation is worth to study more.The main ore prospecting structure of Suhongtu Formation is the river way wing and the searching type is interlayer oxidation zone.The ore prospecting position of Bayingebi Formation is mainly the fan delta front,searching for phreatic oxidation syn-sedimentary uranium deposits.

关 键 词：成矿条件分析 找矿方向探讨 路井凹陷 巴丹吉林盆地 

分 类 号：P619.14[天文地球—矿床学]