闽西南矿区稀土元素分布复杂性的地形差异  

Topographic Differences in the Complexity of Rare Earth Element Distribution in Southwest Fujian Rare Earth Mines

作　　者：王国富 陈志彪[1,2] 王海燕 严鸿海[3] 周文志 WANG Guofu;CHEN Zhibiao;WANG Haiyan;YAN Honghai;ZHOU Wenzhi(School of Geographical Sciences,School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou 350117,China;Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education,Fujian Normal University,Fuzhou 350117,China;Changting Branch of Zhongxi(Fujian)Rare Earth Mining Co.,Ltd,Changting 366330,Fujian,China)

机构地区：[1]福建师范大学地理科学学院、碳中和未来技术学院,福州350117 [2]福建师范大学湿润亚热带生态地理过程教育部重点实验室,福州350117 [3]中稀(福建)稀土矿业有限公司长汀分公司,福建长汀366330

出　　处：《亚热带资源与环境学报》2025年第1期192-200,共9页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金项目“稀土超富集植物对稀土元素的吸收与转运表达”(42277013)和福建师范大学交叉创新团队项目(Y0720409B06)。

摘　　要：复杂的地理环境对稀土矿物的富集和稀土元素的空间分布有着深刻的影响。然而,不同地形位置对稀土元素富集和分异特征的影响尚不清楚。本研究采用钻孔取样和实验分析技术,分析了地形位置对闽西南离子吸附型稀土矿区稀土元素富集分异特征的影响。结果表明:不同微地形条件下稀土元素含量变化复杂,缓坡剖面稀土元素含量趋于富集;矿区属富钇型重稀土矿,其中Y元素含量占稀土元素含量的20.37%~33.37%,稀土元素含量在风化剖面中下部最为集中。从风化剖面浅层到中层,轻稀土/重稀土比值明显降低。研究结果可为寻找关键稀土资源和确定开采过程中浸出剂用量提供参考。The complex geographic environment plays a crucial role in the enrichment of rare earth minerals and the spatial distribution of rare earth elements(REEs or REE).However,the impact of different topographic positions on the REE enrichment and differentiation characteristics remains unclear.This study investigates the impact of topographic location on the enrichment and fractionation of REEs in the ion-adsorption rare earth mining region of Southwest Fujian Province using borehole sampling and experimental analysis techniques.The results indicate that REE content varies significantly across different microtopographic conditions,with enrichment treads more pronounced in gently sloping profiles.The mining area characterized as a yttrium-rich heavy rare earth elements(HREE)deposit,which Y accounting for 20.37%~33.37%of the total REE content.REEs are most concentrated in the middle to lower parts of the weathering profiles.Furthermore,a notable decline in the light-to-heavy REE ratio is observed from the shallow to the middle-depth layers of the profiles.These findings can provide a reference for exploring key rare earth resources and determining leaching agent dosage in the mining process.

关 键 词：离子吸附型稀土矿 稀土元素 地球化学特征 地形因素 

分 类 号：K903[历史地理—人文地理学]