贵州威宁玉龙铌矿稀土富集层的发现及其成矿意义

发布时间：2018-06-27 14:39

  本文选题：稀土矿床 + 风化壳　； 参考：《稀土》2017年06期

【摘要】：在贵州威宁玉龙铌矿区上二叠统宣威组(P_3x)含煤岩系底部铝质粘土岩中发现了稀土富集层。通过详细的剖面沉积序列和稀土元素地球化学研究,发现在该铝土质粘土岩中稀土元素异常富集,∑RE_2O_3介于0.149%~1.494%,平均0.690%,厚1.5 m,稀土含量略高于贵州西部同类型玄武岩风化壳稀土矿床;并呈现出块状玄武岩→凝灰质粘土岩→铝土质粘土岩稀土含量依次升高,δEu则呈现渐强的负异常,说明基性玄武岩的风化作用造成了稀土的富集和δEu的负异常。对矿床成因类型分析认为属于风化淋滤成因稀土矿床。
[Abstract]:A rare earth enrichment layer was found in the aluminous clay rock at the bottom of the coal-bearing rock series of the Upper Permian Xuanwei formation in Yulong niobium mining area in Weining Guizhou Province. Based on the detailed section sedimentary sequence and REE geochemistry, it is found that the REE is abnormally enriched in the aluminous clay rock. 鈭，

本文编号：2074246