伊犁盆地南缘阔斯加尔地区砂岩型铀矿勘查历程与找矿启示  

Prospecting Experience of Sandstone-type Uranium Deposit in Kuosijiaer Area and Its Inspiration to Southern Margin of Yili Basin

作　　者：王毛毛[1] 邱余波 张磊[1] WANG Maomao;QIU Yubo;ZHANG Lei(Geologic Party No.216,CNNC,Urumqi,Xinjiang 830011,China;College of Resources and Environment,Aba Teacher College,Wenchuan,Sichuan 623002,China)

机构地区：[1]核工业二一六大队,新疆乌鲁木齐830011 [2]阿坝师范学院资源与环境学院,四川汶川623002

出　　处：《铀矿地质》2024年第6期1075-1084,共10页Uranium Geology

基　　金：中国核工业地质局铀矿地勘费项目(编号:202205);国家自然科学基金项目(编号:42173072);中国铀业有限公司-东华理工大学联合创新基金项目(编号:NRE2021-06)联合资助。

摘　　要：阔斯加尔地区是近年来在乌库尔其铀矿床往东探索扩大而新发现的砂岩型铀成矿地段。文章通过对阔斯加尔地区不同勘查阶段工作部署以及找矿思路的梳理,结合矿体地质特征,归纳总结铀矿体发现的经验和启示。阔斯加尔地区于20世纪50年代开始勘查工作,前期探索查证为后期的铀矿勘查工作提供了线索和依据。2008年开始带钻查证工作,通过资料梳理,重新预测了铀成矿潜力地区,落实了铀矿产地;2012-2013年进入瓶颈期,经历综合研究和系列基础图件编制,细化了控矿因素,预测了成矿有利地段;2016-2020年为突破期,矿体规模持续扩大,连续揭露到多个较富大的矿体,平米铀量持续提升,资源量规模达中型。阔斯加尔地区是伊犁盆地南缘“乌库尔其-蒙其古尔中部矿集区”的重要组成部分,西接乌库尔其矿床,南邻扎吉斯坦矿床,是伊犁盆地南缘“外围找矿,就矿找矿”的重要地区。中侏罗统西山窑组上段铀矿体为区内主要矿体,其规模较大,资源占比高。通过对已知矿床外围进行不断的探索和查证,搜集整理老资料、开展综合研究与编图等重要的经验和启示,可以作为寻找类似铀成矿地区的借鉴。Kuosijiaer is a newly discovered sandstone-type uranium metallogenic area by the eastward exploring around Wukuerqi uranium deposit in recent years.This paper summarized the experience of the discovery of uranium orebodies by tidying up the work arrangements and prospecting ideas in different exploration stages in Kuosijiaer area and analyzing the geological characteristics of orebodies.The exploration work in Kuosijiaer area began in the 1950s,and the exploration process can be divided into three stages.By tidying up the data in 2008,the uranium metallogenic potential area was re-predicted and one uranium occurrence was confirmed.From 2012 to 2013,the exploration was blocked,comprehensive research and the compilation of a series of basic maps were complied and the ore-controlling factors were refined for the prediction of favorable mineralization area.From 2016 to 2020,the prospecting got breakthrough with the continuous expanding of orebodies,and the exposing of a number of rich and large orebodies,and the continuous increase of per square meter uranium amount,which lead the deposit resource to middle scale.Kuosijiaer area is an important part of the"central Wukuerqi-Mengqiguer mineralization cluster"in the southern margin of Yili Basin,which borders Wukurqi deposit in the west and Zagestan deposit in the south.It is an important area for"the local and peripheral prospecting"in the southern margin of Yili Basin.The uranium orebody in the upper part of Xishanyao Formation of Middle Jurassic is with large scale and high of resource proportion.The continuous exploration and verification in the periphery of known deposits,collecting and sorting of old data,comprehensive research and mapping are important experience which can be used as a reference for finding similar uranium metallogenic areas.

关 键 词：伊犁盆地 阔斯加尔地区 砂岩型铀矿 勘查过程 找矿思考 

分 类 号：P619.14[天文地球—矿床学]