粤北竹筒尖铀矿床稀土元素地球化学特征
投稿时间:2018-08-30  修订日期:2018-08-30  点此下载全文
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作者单位E-mail
罗 强 核工业二九〇研究所 328086462@qq.com 
刘文泉 核工业二九〇研究所  
伏顺成 核工业二九〇研究所  
基金项目:本文受中国核工业地质局铀矿地质项目“广东省下庄及邻近区铀矿资源评价与勘查”(编号:201640)、“广东省翁源县新桥-竹山下铀矿床深部及外围资源潜力扩大研究”(编号:201650-5)联合资助。
中文摘要:通过对区内下庄岩体、白水寨岩体及各类型铀矿石进行稀土元素地球化学特征进行对比发现:白水寨岩体及下庄岩体具有一致的稀土元素分配模式,显示它们具有共同的陆壳沉积物源区,并且二者与矿石有大体类似的LREE富集及Eu负异常的稀土配分模式,表明它们之间稀土元素特征具有继承性,矿石中稀土元素主要继承了赋矿花岗岩的特征,根据铀及稀土元素的迁移形式,可以得出区内铀源主要为就近的花岗岩体,各类型矿石的Y/Ho值范围狭窄,在26.19~33.66之间,也显示它们具共同的源区;而碱交代岩型铀矿石具有相对较高的稀土元素总量(平均254.86×10-6),并且LREE/HREE及(La/Yb)N比值较其它类型样品岩明显降低,说明碱交代岩型矿石中重稀土元素相对富集。
中文关键词:铀矿  稀土元素  地球化学  竹筒尖
 
REE Geochemical Characteristics of Zhutongjian Uranium Deposits in North Guangdong
Abstract:By region Xiazhuang rock,Baishuizai rock,and all kinds of uranium ore REE geochemical characteristics of comparison found:Baishuizhai rock and Xiazhuang rock with a consistent pattern of REE,show that they have shared the crust of sediment source,and both ore have substantially similar LREE enrichment and negative Eu anomaly in REE patterns,suggesting that inherited characteristics of rare earth elements between them,mainly inherited the rare earth elements in the ore granite features,according to the migration in the form of uranium and REE can be drawn from the main source of uranium is the nearest granite,various types of ore Y / Ho narrow range between 26.19-33.66,also show them a common the source region.Alkali metasomatism type uranium ores with high amount of rare earth elements (ΣREE = 184.02 × 10-6 ~ 367.94 × 10-6) and uranium content,show that the alkaline metasomatism has more conducive to the activation and enrichment of uranium.
keywords:Uranium  ore,Rare  earth elements,Geochemistry,Zhutongjian
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