伊犁盆地西南缘砂岩型铀矿新层位新区段找矿思考  

Prospecting Thoughts on New Horizon and Sector of Sandstone-type Uranium Deposits in the Southwestern Margin of Yili Basin

作　　者：胥胜金[1] 杨文龙[1] 邱余波 XU Shengjin;YANG Wenlong;QIU Yubo(Geologic Party No.216,Urumqi,Xinjiang 830011,China;College of Resources and Environment,Aba Teachers 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》2025年第2期244-256,共13页Uranium Geology

基　　金：中国核工业地质局项目“新疆伊犁盆地砂岩型铀矿资源调查评价与勘查”(编号:201905)资助。

摘　　要：为了深入分析伊犁盆地南缘砂岩型铀矿新层位新区段找矿潜力,为伊犁盆地下一步铀找矿方向提供重要支撑,文章通过对伊犁盆地南缘非主攻找矿层位岩性岩相、层间氧化带、地球化学障等关键控矿因素的研究,结合近年来开展的铀矿调查评价工作,系统分析三叠系小泉沟群、下侏罗统八道湾组、中侏罗统头屯河组成矿远景。研究发现,小泉沟群在盆地南缘西部具有一定的成矿潜力,预测小泉沟群工业铀矿体分布在库捷尔太地区L13线以东;八道湾组在苏东布拉克—乌库尔其地区发育层间氧化带和铀矿化,在乌库尔其地区3条勘探线均揭露到铀矿化,在库捷尔太地区12线以西层间氧化带发生转折的部位以及苏东布拉克地区101线,也有可供下一步探索与查证的重要找矿线索;头屯河组在洪海沟矿床以东发育层间氧化带及工业铀矿化,显示出较好的成矿潜力,下一步可在有工业矿化信息且孔深适宜的乌库尔其—苏东布拉克地区分流河道砂体中进行探索和查证。伊犁盆地南缘新层位新区段找矿具有较大潜力,是目前主攻找矿层位水西沟群重要的接替,也是伊犁盆地下一步重要的找矿方向。In order to find the new horizon and sector in the prospecting of sandstone type uranium deposits in the southern margin of Yili Basin and provide important support for the next step uranium exploration in Yili Basin,the metallogenic potential of Xiaoquangou group of Triassic,Badaowan Formation of Lower Jurassic and Toutunhe Formation of Middle Jurassic were systematically studied in the key ore controlling factors such as lithology and lithofacies,interlayer oxidation zone,geochemical barrier in the southern margin of Yili Basin by the investigatin and evaluating uranium deposits discovered in recent years.The result showed that the Xiaoquangou Group had some metallogenic potential in the western part of the southern margin of the basin,and the profitable uranium ore body in Xiaoquangou Group was predicted to the east of exploration line No.13 in Kujieertai area;the Badaowan Formation developed interlayer oxidation zone and uranium mineralization in Sudongbulake-Wukuerqi area,uranium mineralization has been exposed in three exploration lines in Wukuerqi area,there are also important prospecting clues for further exploration and verification at the turning point of the interlayer oxidation zone to the west of exploration line No.12 in Kujieertai area and exploration line No.101 in Sudongbulake area;the Toutunhe Formation developed interlayer oxidation zone and economic uranium mineralization to the east of honghaigou deposit,showing good formation mineral potentiall.The next exploration work was suggested in the sand body of distributary channel with mineralization information at appropriate hole depth in Wukuerqi-Sudongbulake area.The new horizon and sector in the southern margin of Yili Basin was believed with great potential for ore prospecting,which is important in the target substitute of Shuixigou Group and prospecting orientation for Yili Basin.

关 键 词：伊犁盆地 砂岩型铀矿 新层位 新区段 找矿思考 

分 类 号：P619.14[天文地球—矿床学]