Pb同位素打靶法在相山铀矿田找矿勘查中的研究与应用  

Study and Application of Pb Isotopes Targeting Method in Xiangshan Uranium Ore Field

作　　者：刘汉彬[1] 韩娟[1] 李军杰[1] 金贵善[1] 张建锋[1] 张佳[1] 石晓[1] 徐可 LIU Hanbin;HAN Juan;LI Junjie;JIN Guishan;ZHANG Jianfeng;ZHANG Jia;SHI Xiao;XU Ke(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：《世界核地质科学》2022年第3期524-537,共14页World Nuclear Geoscience

基　　金：“深部铀矿Pb同位素及铀系核素示踪技术研究”和“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)联合资助。

摘　　要：在相山火山岩型铀矿田进行了Pb同位素打靶法应用研究。根据Pb同位素打靶法示踪原理,建立了Pb同位素靶标值,拟合出^(208)Pb/^(206)Pb-^(207)Pb/^(206)Pb、^(208)Pb/^(204)Pb-^(206)Pb/^(204)Pb、^(208)Pb/^(204)Pb-^(207)Pb/^(204)Pb 3个成矿靶标值范围分布图。以居隆庵矿床64号已知钻探剖面为例,进行了隐伏铀矿化预测示踪的有效性试验研究。试验表明,该方法对火山岩型隐伏铀矿化有指示作用,能够反映具有矿化蚀变作用的断裂带,结合断裂产状和延伸趋势,可以预测出矿体所在大致位置,是一种厚层土壤覆盖区有效的隐伏铀矿勘查方法。居隆庵矿床区域勘查结果表明,测区内西侧、中部、东侧3条断裂的部分地段显示出Pb同位素异常信息,这些地段为重点找矿成矿有利地段,为工程勘查提供了参考依据。The application of Pb isotope targeting method is studied in Xiangshan volcanic rock type uranium ore field.Based on the tracing principle of Pb isotopes targeting method,the Pb isotope target values were established,and three metallogenic target ranges of ^(208)Pb/^(206)Pb-^(207)Pb/^(206)Pb,^(208)Pb/^(204)Pb-^(206)Pb/^(204)Pb,^(208)Pb/^(204)Pb-^(207)pb/^(204)Pb were fitted.The known drilling profile No.64 of Julongan deposit was studied as the case to test the validity of prediction and tracing for concealed uranium ore body.The test showed that the method can directly indicate the concealed uranium mineralization of volcanic type by reflecting the ore-bearing fault zone and predicting the approximate position of the ore body with the occurrence and extension trend of the fault.The regional exploration results of the Julongan deposit showed that some sections of the three faults on the West,middle and East sides in the survey area indicated the Pb isotopes anomaly information,and provided a reference for engineering exploration.

关 键 词：相山铀矿田 隐伏矿床 PB同位素组成 靶标值 打靶法 

分 类 号：P632[天文地球—地质矿产勘探]