摘要
贵州织金钙镁质含稀土磷块岩中重稀土Y和轻稀土La、Ce、Nd,平均含量分别为327μg/g、219μg/g、127.3μg/g、158.5μg/g,是一种潜在的稀土资源。ICP-MS分析表明,∑REE和Y含量与P 2O 5、CaO含量呈正相关,和MgO含量呈负相关。SEM-EDS面扫描分析结果表明,Y元素与P、Ca元素分布区域基本一致,且呈现均匀分布;Y元素与石英基本不存在相关性,与氟磷灰石和白云石存在一定相关性,且与氟磷灰石的相关性远大于白云石。相比于重稀土Y,La、Ce、Pr、Nd含量较低,与P 2O 5及CaO含量对应关系不明显。结合ICP-MS和SEM-EDS分析结果可推测,Y主要以类质同象方式取代氟磷灰石中Ca元素,在白云石Ca位点可能存在微弱取代。研究结果可为含稀土磷矿石的分离富集提供一定的理论依据。
The anomalous enrichment of light rare earths La,Ce,Nd and heavy rare earth Y in the granitic calcium-containing rare earth phosphate rock of Guizhou is 219μg/g,127.3μg/g,158.5μg/g and 327μg/g,respectively,which is a potential rare earth resource.ICP-MS analysis showed that the content of∑REE and Y was linear with P 2O 5,CaO and MgO.SEM-EDS surface scanning analysis showed that the distribution regions of Y element was substantially consistent with the P and Ca element,and exhibited a uniformly distributed form;there was basically no correlation between Y element and quartz,and it had a certain relationship with fluorapatite and dolomite,and the correlation with fluorapatite was much larger than that of dolomite.The contents of La,Ce,Pr and Nd were low,and the corresponding relationship with P 2O 5 and CaO content was not obvious.Combined with ICP-MS and SEM-EDS,it can be inferred that Y mainly replaced Ca element in fluorapatite by isomorphism,and there was also weak substitution at the Ca-site of dolomite.This work can provide a theoretical basis for the separation and enrichment of rare earth-bearing phosphate rock.
作者
谢俊
张覃
卯松
XIE Jun;ZHANG Qin;MAO Song(College of Mining,Guizhou University,Guiyang 550025,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang 550025,China)
出处
《贵州大学学报（自然科学版）》
2020年第1期41-47,共7页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金项目资助(51864011)
关键词
贵州织金
磷块岩
稀土元素
赋存状态
类质同象
Guizhou Zhijin
phosphate rock
rare earth element
occurrence state
isomorphism
