基于磁异常的砂岩型铀矿氧化还原过渡带定位  

Magnetic Anomaly Based Position Study of Redox Transitional Zone for Sandstone Uranium Deposit

作　　者：付锦[1] 赵宁博[1] 刘俊平[2] 蔡煜琦[1] 刘红旭[1] 刘涛[1] 

机构地区：[1]核工业北京地质研究院,北京100029 [2]核工业216大队,新疆乌鲁木齐830011

出　　处：《铀矿地质》2015年第A01期232-238,共7页Uranium Geology

摘　　要：层间氧化带砂岩型铀矿床由于砂体层间氧化还原环境的差异导致在氧化还原过渡带发生一系列化学变化，在氧化带前锋线附近发生矿物磁性的改变，因此利用这种变化可以进行氧化带前锋线的定位。笔者在我国典型的层间氧化带砂岩型铀矿床产出基地———伊犁盆地南缘开展地面高精度磁测，系统采集了氧化还原带各带钻孔岩芯样品进行磁化率测量，总结其氧化还原过渡带磁异常特征，探讨磁异常和氧化还原过渡带的配置关系、磁异常的起因，以及地面高精度磁测确定氧化带前锋线的机理，分析层间氧化带的砂岩型铀矿各带的磁异常特征，并对其做出合理解释，为层间氧化带砂岩型铀矿的预测提供有效手段。Due to redox environment change of sand body,there occurs a series chemical changes of inter-layered oxidation type uranium deposit in redox transitional zone which will bring the magnetic change of minerals near the redox transitional zone,therefore redox transitional zone can be deduced by detecting the mineral magnetism change. In this paper,high precision magnetic measurement was developed in Ili basin which is a typical interlayered oxidation type uranium deposit base in China,ground soil and drilling core samples were systematically collected and magnetic susceptibility were measured. By sum-marizing the magnetic anomaly characteristics of redox transitional zone,the characteristics was used to locate the redox transitional zone. Meanwhile, the placer mineral identification of core samples, the cause of magnetic anomaly and magnetic anomaly characteristics were discussed and analyzed for each belt,which provide an effective means for the prediction of interlayer oxidation type uranium deposit.

关 键 词：层间氧化带 砂岩型铀矿床 高精度磁测 氧化-还原过渡带 

分 类 号：P631.2[天文地球—地质矿产勘探]