摘要
文章以沉积相分析入手,结合砂体平面、剖面特征,总结了伊犁盆地南缘中下侏罗统水西沟群、中侏罗统头屯河组及中上三叠统小泉沟群等不同含矿层位的岩性、岩相特征,探讨了不同沉积相、砂体的发育特征及其与铀富集之间的关系。研究表明,三角洲分流河道砂体为区内有利铀成矿砂体,铀矿化集中在厚10~35 m的砂砾岩、含砾粗砂岩中;不同沉积亚(微)相类型与构造产出样式控制了研究区含矿砂体的空间展布形态及垂向组合类型,不同类型的含矿砂体及地下水径流方式则制约了层间氧化带尖灭方式及铀矿体产出的形态与位置。
Based on the analysis of sedimentary facies and the characteristics of sand body plane section,this paper summarized the lithofacies characteristics of different ore-bearing horizons in the southern margin of the Yili basin,including the middle and lower Jurassic Shuixigou Group,the middle Jurassic Toutunhe Group and the middle and upper Triassic Xiaoquangou Group,and discussed the development characteristics of sand bodies of different sedimentary facies and the relationship between them and uranium enrichment.The results showed that the delta distributary channel sand body was the favorable uranium ore-forming sand body,and the uranium mineralization was concentrated in the gravel coarse sandstone with the thickness of 10~35 m.Different types of sedimentary microfacies and structural production patterns controlled the spatial distribution and vertical combination types of ore-bearing sandbodies in the study area,while different types of ore-bearing sandbodies and groundwater runoff patterns were restricted the pinch-out mode of interlayer oxidation zone and the shape and location of uranium ore bodies.
作者
王守玉
罗星刚
刘富强
WANG Shouyu;LUO Xinggang;LIU Fuqiang(Geologic Party No.216,CNNC,Urumqi,Xinjiang 830011,China)
出处
《铀矿地质》
CAS
CSCD
2021年第3期355-368,共14页
Uranium Geology
基金
中国核工业地质局全国铀矿资源调查评价计划项目“新疆伊犁盆地砂岩型铀矿调查评价与勘查”(编号:201905)资助。
关键词
砂体发育特征
沉积相
层间氧化带
铀矿化
sand body development characteristics
sedimentary facies
interlayer oxidation zone
uranium mineralization
