研究论文
王晓蓉,陆季鸿,彭峰,涂强,田笠卿,戴乐美,李忠,陈逸.金沙江水系稀土元素环境背景值和地球化学特征[J].环境科学学报,1994,14(2):168-176
金沙江水系稀土元素环境背景值和地球化学特征
- GEOCHEMICAL CHARCTERISTICS AND ENVIRONMENTAL BACKGROUND VALUES OF RARE EARTH ELEMENTS IN RIVER WATER AND SEDIMENTS FROM JINSHA RIVER SYSTEMS
- 基金项目：
- 作者
- 单位
- 王晓蓉
- 南京大学环境科学与工程系, 南京 210008
- 陆季鸿
- 南京大学环境科学与工程系, 南京 210008
- 彭峰
- 南京大学环境科学与工程系, 南京 210008
- 涂强
- 南京大学环境科学与工程系, 南京 210008
- 田笠卿
- 南京大学现代分析中心
- 戴乐美
- 南京大学现代分析中心
- 李忠
- 南京大学现代分析中心
- 陈逸
- 南京大学现代分析中心
- 摘要：采用化学分离富集-等离子发射光谱法测定了金沙江水系江水和沉积物中15个稀土元素（La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Er、Tm、Yb、Lu、Sc和Y）的含量, 提供了金沙江水系江水和沉积物稀土元素环境背景值。结果表明, 金沙江水系稀土元素分布模式呈负斜率, 铕呈负异常。水系沉积物∑Ce/∑Y比值在2.52-4.18之间, Eu/∑REE比值在0.56-0.94之间, 说明金沙江水系沉积物属贫铕富铈族稀土。金沙江水系江水和沉积物稀土元素背景值明显受汇水区岩性所控制。
- Abstract：The contents of l5 rare earth elements(REE) in river water and sedi-ments from Jinsha River systems were determined by ICP-AES.The environ-mental background values of REE in river water and sediments from the river systems were provided.The results showed that the REE distributionpattern in Jinsha River systems was charactcrized by negative slopes and nega-tive Eu anomalies.The ratio of ∑Ce/∑Y was within a range of 2.52-4.18and the ratio of Eu/∑ REE was within a range of 0.56-0.94 in sediments.It was obvious that REE of sediments in Jinsha River systems is distinctdepletion in Eu and rich in Ce-family REE. The results also showed thatbackground values of REE in Jinsha River systems are controlled by rocktypes of the catchment area.
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