贵州省茅台地区土壤中稀土元素含量及空间分布规律研究

采集了茅台地区的116个表层土壤样品,用电感耦合等离子体质谱(ICP-MS)分析了稀土元素(REE)含量。利用地统计学和空间分析等方法,对稀土元素(REE)含量、分异特征、空间分布规律等进行分析和探讨。研究结果表明,研究区表层土壤ΣREE平均含量为287.1μg/g,高于中国大陆土壤(186.8μg/g)和地壳中(207μg/g)稀土元素丰度;轻稀土相对富集,轻重稀土分异程度较大;在成土过程中Ce呈现正异常,Eu呈现负异常;六种主要土壤类型稀土元素含量分异规律为:潮土>紫色土>水稻土>石灰土>黄壤>黄棕壤;研究区表层土壤稀土总含量空间分布起伏变化较大,表现为局部相对高值、低值的斑块状分布。本研究可为茅台地区地质地理环境研究提供相关参考,为茅台酒后备资源基地的合理选址提供科学依据。

Concentration and Spatial Distribution Characters of the Rare-Earth Elements in Soils in Maotai, Guizhou Province

A total of 116 surface soil samples were collected from the Maotai area of Guizhou Province,and rare-earth elements(REE) were determined by inductively coupled plasma mass spectrometry(ICP-MS).The geostatistical and spatial analyses were applied to documenting the concentration distribution,fractional characteristics and spatial distribution of REEs in soils.The results showed that the mean content of ΣREE in soil was 287.1 μg/g,much higher than that in China soil(186.8 μg/g) and the crust(207 μg/g).Relative enrichment of LREE and variable HREE were observed in the soils.δCe showed positive anomalies in the process of soil development,whereas δEu was negatively anomalous.For different soil types,the REEs contents follow the order of moisture soil > purplish soil > paddy soil > limestone soil > yellow soil > yellow brown soil.The ΣREE presented a patch-shaped distribution between high and low concentrations.The results of this study provided useful information to probe the local geographical environment and to help select the backup site for sustainable development of Maotai company.