对西太平洋海山区和东太平洋CC区18个站位40个沉积物样品进行了元素测定,以探讨西太平洋海山区含沸石深海粘土中稀土元素富集的地球化学特征和可能的富集机制.西太平洋海山区沉积物类型复杂,含沸石型深海粘土中富含各类微量元素,尤其以稀土元素富集程度最大,接近或高于中国南方离子吸附型稀土矿床,含沸石型深海粘土主要分布在马绍尔和莱恩群岛,∑REE最高达1018.84 μg·g-1,其中∑LREE为781.00 μg·g-1,∑HREE为237.84 μg·g-1.平缓的北美页岩归一化模式、显著的δCe负异常、以及轻中重稀土分馏特征表明热液铁锰水合物以及早期成岩的含磷矿物混入是造成含沸石深海粘土中稀土元素富集的可能机制.含沸石型深海沉积物中REE的具体富集机制还需要做进一步的研究.
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