以中国西南碳酸岩盐地区的红枫湖及环湖河流水体为研究对象,采用液-液萃取和ICP-MS测试方法,对水中溶解态稀土元素浓度进行了测定,借以探讨碳酸盐岩水体环境下稀土元素的地球化学行为和环境效应.研究结果表明,红枫湖湖水溶解态稀土含量相对较低,∑REE总浓度分布于14.3 ～27.2 ng·kg-1之间,平均含量为18.24 ng·kg-1,明显低于地表水体浓度平均值.环湖河水溶解态∑REE浓度分布于4.07～102.28 ng·kg-1,平均为24.12 ng·kg-1.湖水和河水的页岩(PAAS)标准化的溶解态稀土元素配分模式都显示了显著的重稀土富集特征以及Ce元素负异常,而水化学络合计算结果显示,水体中溶解态稀土几乎以占绝对优势的碳酸盐无机络合形态存在,其他络合方式所占比例非常微小.这些都显示与相对偏碱性的水化学环境有关.
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