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用ＩＣＰ－ＭＳ对ＴＡＧ热液活动区表层热液沉积物中６个块状硫化物样品进行了稀土元素分析。所有样品均表现出正Ｅｕ异常（ＥｕＮ／Ｅｕ＊Ｎ＝１．２７～２．６８）和ＬＲＥＥ相对富集（ＬａＮ／ＹｂＮ＝１５．７９～４７．６２）的球粒陨石标准化配分模式，热液沉积物样品中稀土元素组成的变化是由于海底热液循环体系中热液流体和海水不同程度混合作用的结果，并且，海水与热液流体的混合作用是在热液沉积物形成以前发生的，与黑烟囱流体的稀土元素配分模式对比，表明热液沉积物的ＲＥＥ部分来自下伏的玄武岩基底，在热液沉积物的形成过程中，ＬＲＥＥ得到了较高程度的富集，同时，海底热液沉积物的稀土元素中Ｅｕ的变化可以一定程度的反映出热液流体的演化特征。
Rare earth elemental analysis of 6 massive sulfide samples from surface hydrothermal sediments of TAG hydrothermal zone was performed by ICP-MS. All the samples showed normalized chondrite normalization patterns of normal Eu anomaly (EuN / Eu * N = 1.27-2.68) and LREE relatively enriched (LaN / YbN = 15.79-47.62) The variation of REE composition in liquid sediment samples is a result of mixed mixing of hydrothermal fluids and seawater in seafloor hydrothermal fluid systems, and the mixing of seawater and hydrothermal fluids occurs before hydrothermal sediment formation , Which shows that the REE part of the hydrothermal sediments comes from underlying basalt basalts in comparison with the REE partitioning patterns of black chimney fluids. During the formation of hydrothermal sediments, the LREEs are enriched to a great extent. At the same time, The changes of Eu in the rare earth elements of hydrothermal sediments can reflect the evolution characteristics of hydrothermal fluids to a certain extent.