基于GIS的离子型稀土堆浸尾矿区稀土分布研究

Spatial Distribution of Rare Earth Elements in Weathered Crust Rare Earth Tailing Based on GIS

以赣县风化壳淋积型稀土堆浸尾矿为研究对象,研究尾矿区土壤中稀土元素的含量及分布状况。采用地统计分析方法研究土壤中稀土含量分布空间变异性,并用克里金法(Kriging)进行空间插值作图。实验结果表明,土壤中稀土含量变异系数都属于中等变异强度以上,其中La元素的变异强度最大,变异系数为170%。空间分布上,Yb的空间相关性较强,La元素的空间相关性最差,其他稀土元素属于居中程度。插值结果显示,土壤中La质量由北到南成阶梯状逐渐减少,其余稀土元素分布情况大致相似,由西北方向到东南方向逐渐增加。

Content and distribution of rare earth elements in tailings from leaching of ores in the weathered crust rare earth in Gan County were studied.The method of statistical analysis was used to make the spatial variance estimation of rare earth content in the tailing soil and Kriging method was used for spatial interpolation.The experiment result indicates that the variation of rare earth content in the soil belongs to moderate variation,of which the strongest intensity of variation belongs to the La element featured by the variation of 170%.As to the spatial distribution,Yb occupies the strongest in spatial correlation with La element being the worst and the other rare earth elements standing on the middle level.The interpolation results show that the quality of La element in the soil decreases from north to south step-wisely in a gradual manner while the distribution of La decreases on the other way around,of which the remaining rare elements are characteristic of similar distributions which find their expressions in the gradual increase from the northwest to the southeast.