论文部分内容阅读
选择赣南富稀土矿区典型环境地球化学景观，研究了稀土元素在土壤中的含量、分布及赋存形态特征。结果表明，在各单元景观的土壤中稀土元素的含量分布具有规律性。土壤中稀土元素的分布模式继承了母岩的特征，具有明显的Eu负异常。但Ce在残积景观和堆积淋溶景观的土壤中呈现正异常，而在水上景观土壤中出现Ce负异常。稀土元素在各单元景观土壤中的赋存形态特征也不同。总体上，稀土元素主要以可交换态和有机结合态（主要是松结有机态）形式存在于矿区土壤中，具有很高的活性。
The typical environmental geochemical landscapes in the rare earth mining area in southern Jiangxi Province are selected to study the contents, distributions and morphological characteristics of rare earth elements in soils. The results show that the content of rare earth elements in the landscape of each unit has a regular distribution. The distribution pattern of rare earth elements in the soil inherits the characteristics of the parent rock and has a clear negative Eu anomaly. However, Ce shows a positive anomaly in the residual landscape and the soil with the leaching landscape, whereas the Ce anomaly appears in the landscape with the water landscape. Rare earth elements in each unit of landscape soil in the occurrence of morphological characteristics are also different. In general, rare earth elements mainly exist in the soil of the mining area in the form of exchangeable and organic-bound (mainly loosely-linked organic) and have high activity.