摘要
为揭示白云鄂博稀土开采对周围草原土壤的影响,本文以白云鄂博矿区为中心,利用距离梯度采样法并结合实验室化学分析,在测定东南、西北和西南三条样带18个样地土壤中稀土元素含量的基础上,分析了矿区外围草原土壤中稀土元素累积的空间分布特征。结果表明,研究区土壤混合稀土元素含量远超背景值;东南和西南方位土壤混合稀土元素含量均值高于西北方位,且距离矿区越近含量越高,东南、西南方位10 km范围内土壤稀土累积严重;土壤中稀土元素含量具表聚性特征,呈右倾的轻稀土富集模式,且轻重稀土分馏程度高。分析发现,研究区土壤中累积的稀土元素主要来源于白云鄂博矿区,在风向和距离的双重影响下,累积程度呈现明显的空间分异特征。
To reveal the impact of mining in Baiyan Obo mine on the surrounding grassland soil, we set up three transects and used the distance gradient sampling method and laboratory chemical analysis to detect the content of REEs in the soil. The results showed that the content of REEs in the study area far exceeded the background value. Furthermore, the average content of mixed rare earth elements in the soil in southeast and southwest is higher than that in northwest, and the closer the location of soil to the mining area, the higher the content of rare earth in it. Especially, the accumulation of REEs is serious within 10 km southeast and southwest of mining area. Moreover, REEs in soil show surface aggregation characteristics and present a right-inclined light rare earth enrichment pattern.The study found that the rare earth elements accumulated in the soil in the study area mainly originated from the Baiyan Obo mining area. Under the dual influence of wind direction and distance, the accumulation degree showed obvious spatial differentiation characteristics.
作者
关海波
李金霞
牟艳军
高文邦
张春妮
GUAN Hai-bo;LI Jin-xia;MU Yan-jun;GAO Wen-bang;ZHANG Chun-ni(College of Life and Environmental Sciencesy Minzu University of China,Beijing 100081,China;Resource and Environmental Monitoring Laboratory,College of Resources and Environmental Economics,Inner Mongolia University of Finance and Economics,Hohhot 010070,China;College of Resources and Environment,Baotou formal College,Inner Mongolia University of Science and Technology,Baotou 014010,China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China)
出处
《稀土》
CAS
CSCD
北大核心
2021年第5期27-35,共9页
Chinese Rare Earths
基金
国家自然科学基金项目(41161010)
内蒙古自治区高等学校科学研究项目(NJSY14126)
内蒙古自然基金项目(2021MS04001)
中央民族大学2019年博士自主科研项目(BBZZKY-2019083)。
关键词
稀土累积
空间分异
土壤
白云鄂博
accumulation of rare earth elements
spatialheterogeneity
soil
Bayan Obo
