Rare-earth distributions with a positive Ce anomaly in the Western North Atlantic Ocean
Rare-earth distributions with a positive Ce anomaly in the Western North Atlantic Ocean
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DOI：
10.1038/301324a0
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发表时间：
1983-01
期刊：
影响因子：
64.8
通讯作者：
H. Baar;Michael P. Bacon';Peter G. Brewer'
中科院分区：
文献类型：
--
作者：
H. Baar;Michael P. Bacon';Peter G. Brewer'
根据马尾藻海稀土元素的垂直分布，首次报道了海水中Pr、Tb、Ho、Tm和Lu的剖面以及La、Ce、Sm、Eu和Yb的剖面。首次在海水中观测到的Ce正异常归因于近岸沉积物作为Ce的来源减少(参考文献1)。1)。所有垂直剖面都符合沉淀物(可能是硅质或钙质)对三价稀土的吸附，然后在载体溶解时在海底或海底附近释放。非常不同的Ce分布显示了氧化还原反应的附加效应。
From the vertical distributions of the rare-earth elements (REE) in the Sargasso Sea we now report the first profiles of Pr, Tb, Ho, Tm and Lu in seawater, together with profiles for La, Ce, Sm, Eu and Yb. The first observations of positive Ce anomalies in seawater are ascribed to reducing inshore sediments as a source for Ce (ref. 1). All vertical profiles are consistent with adsorption of trivalent rare earths by settling particles, possibly siliceous or calcareous, followed by their release at or near the sea floor on dissolution of the carriers. The very different Ce profile demonstrates the additional effects of oxidation–reduction reactions.