西北地质2024，Vol.57Issue(4)：113-120,8.DOI:10.12401/j.nwg.2024021
白云鄂博矿区矿石中磁铁矿及萤石的X射线粉晶衍射半定量分析方法及矿物三维空间分布模型
Semi-quantitative Analysis of Magnetite and Fluorite by X-ray Powder Crystal Diffraction and Three-dimensional Distribution Model of Minerals in Bayan Obo Mining Area
摘要
Abstract
Bayan obo super large Fe-RE-Nb deposit,associated with a large amount of fluorite and other re-sources.At present,the multi-element quantitative analysis method is used in the evaluation of mine resources,which can not objectively characterize the mineral composition and occurrence state of available resources.In order to determine the occurrence form of elements and the content of magnetite and fluorite minerals more ac-curately,this study uses the powder crystal X-ray diffraction K-value method for quantitative analysis,and uses dolomite as the reference material to prepare 1∶1 proportion of single mineral samples of magnetite,fluorite and dolomite produced in Bayan Obo,the reference intensity of magnetite with dolomite as the reference is KFe3O4=0.61,and the reference intensity of fluorite is KCaF2=2.51.At the same time,the K value of other com-mon co-minerals in Bayan Obo is selected.In order to realize the semi-quantitative analysis of the mineral con-tent in different ore types of Bayan Obo,the correctness and applicability of the improved optimization K are verified by testing the known standard samples.Based on the quantitative analysis data of a large number of ac-tual core ore samples,a three-dimensional model of spatial distribution of magnetite and fluorite minerals in Bayan Obo main mine was obtained by Kriegin interpolation method,and the spatial distribution characteristics of resource minerals were preliminarily presented.It is speculated that there is still a huge prospecting potential in the deep part of the mine area.X-ray powder diffraction quantitative analysis technology can directly study the semi-quantitative analysis of minerals in recoverable resources,which explores a new solution for precise mining and comprehensive utilization of resources,and also provides an important technical reference for the optimization of mineral processing process.关键词
白云鄂博/磁铁矿/萤石/X射线粉晶衍射/矿物组分/半定量分析Key words
Bayan Obo/magnetite/fluorite/powder X-ray diffraction/mineral compositions/semi-quan-titative analysis分类
天文与地球科学引用本文复制引用
孙宁岳,闫国英,李国武,王昭静,申俊峰,徐渴鑫,孟文祥,李凤坤..白云鄂博矿区矿石中磁铁矿及萤石的X射线粉晶衍射半定量分析方法及矿物三维空间分布模型[J].西北地质,2024,57(4):113-120,8.基金项目
包头钢铁(集团)有限责任公司矿山研究院(有限责任公司)2021年A类重点项目"白云鄂博稀土-铌-铁资源矿物标型学研究(BGKY-ZH-2021-Z-017)"资助. （集团）
