刘明,王飞宇,丁怡,胥维坤,陈竟博,范德江

• 1:中国海洋大学海洋地球科学学院
• 2:中国海洋大学海底科学与探测技术教育部重点实验室
• 3:国家深海基地管理中心

摘要(Abstract)：

本文以黄河口和小浪底水库表层沉积物、利津水文站悬浮沉积物为研究对象，在分析其物质组成特征的基础上，研究了稀土元素(REE)的含量、配分模式、分异特征及其制约因素，探讨了黄河沉积物REE的物源示踪意义。结果表明，黄河口和小浪底水库表层沉积物、利津水文站悬浮沉积物稀土元素总量(∑REE)平均值分别为178.16×10~(-6)、181.38×10~(-6)、158.26×10~(-6);三种沉积物REE的上地壳标准化配分模式均为轻稀土富集的略右倾模式，轻稀土的分异程度与黄土相比较高，而重稀土未出现明显分异；Eu和Ce相对于上陆壳物质REE没有发生明显分异；黄河口表层沉积物REE配分模式和分异程度与利津站悬浮沉积物相似度较高，而与小浪底水库沉积物略有差异。黄河口沉积物中的∑REE除受到源岩和沉积物粒度的显著影响外，主要与碳酸盐、磷酸盐及Fe-Mn氧化物等矿物和物质相结合。黄河沉积物REE分异显著弱于长江沉积物，造成两者差异的因素主要为源岩不同导致的沉积物组成的差异，这可作为两类沉积物识别的重要标志。本研究结果可为进一步认识现代黄河沉积物REE组成特征及其示踪意义提供依据。

关键词(KeyWords)： 稀土元素;黄河沉积物;组成特征;配分模式;制约因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41606054)资助~~

作者(Author): 刘明,王飞宇,丁怡,胥维坤,陈竟博,范德江

DOI: 10.16441/j.cnki.hdxb.20220333

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