| 粤北下庄矿田小水铀矿床地球化学特征分析 |
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| 引用本文： | 蒙毅,;王正其,;吴烈勤.粤北下庄矿田小水铀矿床地球化学特征分析[J].火山地质与矿产,2009(4):271-277. |
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| 作者姓名： | 蒙毅 ;王正其 ;吴烈勤 |
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| 作者单位： | [1]东华理工大学,江西抚州344000; [2]核工业290研究所,广东韶关512026 |
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| 基金项目： | 核工业地质勘查基金资助 |
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| 摘 要： | 粤北小水矿床是下庄矿田典型的交点型铀矿床。通过对矿床内发育的花岗岩、辉绿岩及铀矿石采样分析．发现小水矿床矿石具有轻稀土富集的稀土元素特征和富集大离子亲石元素Rb、Th的微量元素特征。与辉绿岩的相应特征十分吻合，与花岗岩的相应特征差异很大，推测其成矿物质来源于深部地幔流体（富含U、F、CO2），且交点型矿石的形成很有可能伴有幔源成矿流体对与花岗岩有关的早期红化矿石的叠加改造作用。
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| 关 键 词： | 稀土元素 微量元素 地幔流体 交点型铀矿床 |
Analysis of geochemical characteristics of Xiaoshui uranium deposit in Xiazhuang ore-field,Northern Guangdong Province |
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| Institution: | MENG Yi, WANG Zheng-qi, WU Lie-qin (1. East China Institute of Technology,Fuzhou 344000,China; 2. Research Institute No. 290, CNNC, Shaoguan,Guangdong, 512026, China) |
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| Abstract: | Xiaoshui deposit is a typical intersection-type uranium deposit in Xiazhuang ore-field, Northern Guangdong Province. Basing on the analysis of rocks and ores sampled from granite, diabase and uranium ore occurred in the deposit, it is revealed that the uranium ore is characterized by enrichment of I.REE and large-ion lithophile trace elements Rb and Th, being coincided with correspondent characteristics of the diabase but quite different from those of the granite. It can be inferred that the ore-forming material source is the deep mantle fluid （rich in U, F, CO2） and the formation of intersection-type ore is possibly accompanied by overlapping-reformation of the mantle fluid acted on the early-stage redden ore genetically related to the granite. |
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| Keywords: | rare earth elements trace elements mantle fluid intersection-type uranium deposit |
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