铅同位素特征值示踪方法在鹿井铀矿田的应用  

Application of Pb Isotope Characteristic Value Tracing Method in Lujing Uranium Ore Field

作　　者：韩娟[1] 刘汉彬[1] 张建锋[1] 张佳[1] 李军杰[1] 金贵善[1] 石晓[1] HAN Juan;LIU Hanbin;ZHANG Jianfeng;ZHANG Jia;LI Junjie;JIN Guishan;SHI Xiao(Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2023年第3期418-432,共15页Uranium Geology

基　　金：核能开发项目“塔里木盆地砂岩铀矿元素-同位素地球化学预测方法研究”(编号:测HTLM2101-06)资助。

摘　　要：根据铅同位素特征值示踪原理,文章在鹿井铀矿田进行已知43号剖面试验基础上,对该矿田的鹿井矿床、沙坝子矿床及外围进行了区域勘查评价。研究结果表明:Pb同位素特征值示踪方法能显著地指示含矿断裂所在位置,是一种有效的隐伏铀矿体示踪方法。在鹿井矿床及外围,圈定出4片重点成矿预测区,分别为鹿井矿床、下洞子矿床、高昔矿床周围、集溪周围,其中集溪周围异常范围较大。在沙坝子矿床及外围,圈定出3片重点成矿异常区,其中2片在龙头、梨花开矿床和沙坝子、大陡壁矿床附近,1片在南部F_(26)断裂带附近。Pb同位素特征值异常划分为该矿田勘查提供了参考依据。Based on the principle of lead(Pb)isotope characteristic value tracing and the test of profile No.43 in Lujing uranium ore field,the regional exploration and evaluation of Lujing deposit,Shabazi deposit and the periphery of the ore field were carried out.The results showed that the Pb isotope characteristic value tracing method can clearly distinguish the location of ore bearing faults,effective in tracing concealed uranium ore bodies.In the Lujing deposit exploration area,four key metallogenic prediction areas were delineated,of which three are around Lujing deposit,Xiadongzi deposit and Gaoxi deposit,and one is around Jixi,with a large range of anomalies.In Shabazi deposit,three key metallogenic anomaly areas were delineated,of which two are near Longtou,Lihuakai uranium deposits,Shabazi and Dadoubi uranium deposits,and one is near F_(26) fault zone in the south of the survey area.Therefore,the abnormal division of Pb isotope characteristic values have provided a reference basis for the exploration of the ore field.

关 键 词：鹿井铀矿田 隐伏矿床 PB同位素组成 特征值 勘查方法 

分 类 号：P597.1[天文地球—地球化学]