铀矿地质2013，Vol.29Issue(3)：152-161,10.DOI:10.3969/j.issn.1000-0658.2013.03.005
广西向阳坪铀矿床微量元素和稀土元素地球化学特征
Geochemical Characteristics of Trace and Rare Earth Elements in Xiangyangping Uranium Deposit of Guangxi
陈琪 1肖建军 1范立亭 1文成1
作者信息
- 1. 核工业230研究所,湖南长沙410011
- 折叠
摘要
Abstract
The trace and rare earth elements analysis were performed on two kinds ore-hosting rocks (Xiangcaoping granite and Douzhashan granite),aherated cataclastic granite and uranium ores in Xiangyangping uranium deposit of Guangxi.The results show that both of the two kinds granites display similar maturity features of highly evolved crust with the enrichment of Rb,Th,U,Ta and Pb,the depletion of Ba and Sr,high Rb/Sr and low Nb/Ta ratio,moderately rich light rare earth elements,strong negative Eu anomaly.Moreover,Douzhashan granite have higher Rb/Sr ratio and U content,which indicate it experienced more sufficient magma evolution and have higher potential of uranium source.There are almost no change in the content of trace and rare earth elements and distribution patterns during chloritization,hydromicazation and potash feldspathization of granite,but there occurred uranium enrichment and mineralization and REE remobilization while hematitization was superposed.This suggest that hematitization is most closely correlated with uranium mineralization in the working area.Because Most hematitization cataclastic rocks and uranium ore display similar geochemical characteristics to Douzhashan granite with relative high Rb/Sr and low Nb/Ta,Zr/Hf,ΣREE,LREE/HREE ration,and the trace and rare earth elements content and distribution patterns of some Xiangcaoping hematitization cataclastic rocks are between the two kinds of granite,therefore it can be concluded that the mineralization materials were mainly from Douzhashan granite and partly from Xiangcaoping granite.关键词
地球化学/稀土元素/微量元素/向阳坪铀矿床Key words
Geochemistry/ rare earth element/ trace element/ Xiangyangping uranium deposit分类
天文与地球科学引用本文复制引用
陈琪,肖建军,范立亭,文成..广西向阳坪铀矿床微量元素和稀土元素地球化学特征[J].铀矿地质,2013,29(3):152-161,10.
