广西金鸡盆地砂岩型铀矿化特征与找矿方向  

Mineralization Characteristics and Prospecting Target of Sandstone-type Uranium Deposit in Jinji Basin,Guangxi

作　　者：李小英 LI Xiaoying(Nuclear Geological Brigade No.307 of Guangxi Zhuang Autonomous Region,Guigang,Guangxi 537100,China)

机构地区：[1]广西壮族自治区三〇七核地质大队,广西贵港537100

出　　处：《世界核地质科学》2022年第2期199-207,共9页World Nuclear Geoscience

基　　金：“广西藤县金鸡盆地铀矿地质找矿选点调查”项目(编号:桂地矿[2017]6号)资助。

摘　　要：广西金鸡盆地是广西境内最早发现砂岩型铀矿化的沉积盆地,铀矿勘查工作起步较早,铀矿找矿信息丰富。通过对金鸡盆地的铀矿化特征、典型矿床解剖,分析了该盆地的铀成矿条件,总结了铀成矿的控矿因素。结果表明,盆内铀矿化主要受岩相古地理、古气候等因素控制,盆地周围的老地层及花岗岩体的长期风化、侵蚀为盆地沉积陆源碎屑物质主要供给区,为盆内铀矿化提供了主要的铀源。综合评价认为广西金鸡盆地具备陆相盆地砂岩型铀成矿环境和较好的找矿前景,指出金鸡盆地的古河道、不整合面、盆地西缘是今后找矿工作的重点方向。Jinji basin is the first one in Guangxi with discovered sandstone-type uranium mineralization by earlier uranium exploration and abundant uranium prospecting data.Based on the study and analysis of uranium mineralization and typical deposit characteristics in the basin,this paper discussed the metallogenic conditions,summarized the controlling factors of some uranium deposits.The uranium mineralization in the basin is controlled by lithofacies,paleogeography and paleoclimate.The long term weathering,and erosion of strata and the granite pluton around the basin provided the main source of uranium mineralization in the basin.It was suggested that the Jinji basin in Guangxi was with the metallogenic continental basin environment for sandstone type uranium deposit and good prospecting prospect.It was proposed that the paleochannel,unconformity and western margin of the Jinji basin were the key prospecting target in the future exploration.

关 键 词：金鸡盆地 砂岩型铀矿 铀矿化特征 成矿条件 找矿方向 

分 类 号：P619.14[天文地球—矿床学]