本文選題：稀土礦床 + 風化殼��； 參考：《稀土》2017年06期

【摘要】：在貴州威寧玉龍鈮礦區(qū)上二疊統(tǒng)宣威組(P_3x)含煤巖系底部鋁質粘土巖中發(fā)現(xiàn)了稀土富集層。通過詳細的剖面沉積序列和稀土元素地球化學研究,發(fā)現(xiàn)在該鋁土質粘土巖中稀土元素異常富集,∑RE_2O_3介于0.149%~1.494%,平均0.690%,厚1.5 m,稀土含量略高于貴州西部同類型玄武巖風化殼稀土礦床;并呈現(xiàn)出塊狀玄武巖→凝灰質粘土巖→鋁土質粘土巖稀土含量依次升高,δEu則呈現(xiàn)漸強的負異常,說明基性玄武巖的風化作用造成了稀土的富集和δEu的負異常。對礦床成因類型分析認為屬于風化淋濾成因稀土礦床。
[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，

本文編號：2074246