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本文利用“大洋多金属结核调查”期间“海洋４”号调查船ＨＹ_４－８７１、８８１航次在东太平洋海盆取得的底层水、沉积物、间隙水及多金属结核样品，对比研究了稀土元素（ＲＥＥ）在海底水－沉积物界面系统不同物质相中的分布变化及配分特征。结果表明，在大洋氧化性沉积物间隙水中ＲＥＥ相对于底层水亏损。除Ｃｅ外，沉积物与多金属结核ＲＥＥ含量较为接近。底层水、沉积物、间隙水ＲＥＥ配分特征极为相似，都表现出中稀土相对于轻、重稀土的轻度分离和富集，Ｃｅ表现为负异常。多金属结核中中稀土也有类似的富集倾向，但Ｃｅ主要表现为正异常。随深度的增加，沉积物ＲＥＥ含量增加，但其配分模式不变。
In this paper, the samples of bottom water, sediment, interstitial water and polymetallic nodules obtained from the ocean survey ship HY_4-871, 881 voyage in the eastern Pacific basin during the “oceanic polymetallic nodule survey” were used to compare the REE ) In the sediment-seabed interface system and its distribution characteristics. The results show that REE is depleted in water relative to the bottom water in oceanic oxidizing sediment interstitial water. In addition to Ce, the REE content of sediments and polymetallic nodules is close. The characteristics of REE partitioning in the bottom water, sediment and interstitial water are very similar, showing mild segregation and enrichment of middle REE relative to light and heavy rare earths. Ce shows negative anomalies. In polymetallic nodules, REEs also have similar enrichment tendency, but Ce is mainly characterized by positive anomalies. With the increase of depth, the content of REE in sediments increased, but its distribution pattern remained unchanged.