白云鄂博主矿和东矿中重稀土分布特征研究  

Research on Distribution Characteristics of Medium and Heavy Rare Earths in Bayan Obo Main and East Orebody

作　　者：魏威 杨占峰[1] 王其伟[1] 秦玉芳[1] 李强[1] 金海龙 WEI Wei;YANG Zhan-feng;WANG Qi-wei;QIN Yu-fang;LI Qiang;JIN Hai-long(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究和综合利用全国重点实验室,内蒙古包头014030

出　　处：《稀土》2024年第3期1-9,I0003,共10页Chinese Rare Earths

基　　金：国家重点研发计划项目(2021YFC2901704,2020YFC1909101);内蒙古自治区自然科学基金面上项目(2021MS04004);白云鄂博稀土资源研究与综合利用全国重点实验室自主课题(2021Z2349)。

摘　　要：系统采集白云鄂博主矿和东矿具有代表性矿石样品和东矿深部岩芯样品,对样品进行中重稀土含量分析,利用偏光显微镜、场发射扫描电子显微镜(FESEM)、能谱仪(EDS)和矿物自动识别系统等研究不同矿物、矿石中中重稀土的分布特征。同时,通过东矿深部大量岩芯分析数据,对中重稀土、稀土总量和铁的关系进行研究。结果表明,主矿中重稀土含量最高的矿岩为霓石型铌稀土铁矿石(0.189%)和萤石型铌稀土铁矿石(0.175%);东矿中重稀土含量最高的矿岩为霓石型铌稀土矿石(0.204%)和霓石型铌稀土铁矿石(0.179%)。中重稀土在矿物中的分布率大小为:氟碳铈矿(43.69%)>独居石(38.63%)>其他稀土矿物。白云鄂博中重稀土配分虽然较低,但由于总稀土品位高和总储量巨大,中重稀土资源量潜力大,应加强对白云鄂博中重稀土的资源评价与开发利用研究。该研究结果为今后实现精准采矿、精细选冶、资源高值化综合利用,充分发掘白云鄂博中重稀土资源潜在价值起到积极作用。The representative ore samples of the main and east orebody of Bayan Obo and the deep core samples of the east orebody were systematically collected.The contents of medium and heavy rare earths in the samples were analyzed by physical and chemical detection,and the distribution characteristics of medium and heavy rare earths in different ores were studied by polarized light microscope,field emission scanning electron microscope(FESEM),energy dispersive spectrometer(EDS)and mineral automatic identification system.At the same time,the relationship between medium and heavy rare earths,the total amount of rare earths and iron was studied through a large amount of core detection data in the deep part of the east orebody.The results show that the ore-bearing rocks with the highest content of medium and heavy rare earths in the main orebody are sodium pyroxene type niobium rare earth iron ore(0.189%)and fluorite type niobium rare earth iron ore(0.175%),and the ore rocks with the highest content of medium and heavy rare earths in the east mine are sodium pyroxene type niobium rare earth iron ore(0.204%)and sodium pyroxene type niobium rare earth ore(0.179%).The distribution rate of medium and heavy rare earths in minerals is:bastnaesite(43.69%)>monazite(38.63%)>other rare earth minerals.Although the distribution of medium and heavy rare earths in Bayan Obo is relatively low,due to the high grade of total rare earths and the large total reserves,the resource potential of medium and heavy rare earths is huge,and research on the development and utilization of medium and heavy rare earths in Bayan Obo should be strengthened.The research results play a positive role in realizing precision mining,fine smelting,high value utilization of resources and fully exploring the potential value of medium and heavy rare earth resources in Baiyun Obo.

关 键 词：白云鄂博 中重稀土 分布特征 氟碳铈矿 独居石 

分 类 号：P618.7[天文地球—矿床学] P595[天文地球—地质学]