RARE EARTH ELEMENTS ANALYSIS FOR PROVENANCE STUDY OF SURFACE SEDIMENTS OFF SOUTH SHANDONG PENINSULA
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摘要: 通过对山东半岛南部海域147个表层沉积物样品和周边入海河流46个表层沉积物样品粒度与稀土元素（REE）测试分析，系统地研究了该区稀土元素分布、δEu和δCe异常以及稀土元素的球粒陨石标准化和上陆壳标准化配分曲线特征等。结果表明，研究区沉积物REE呈现轻稀土元素（LREE）富集、重稀土元素（HREE）平坦以及中等程度的Eu异常等特征。对代表站位与长江、黄河及周边中小入海河流沉积物的稀土元素分析对比，利用以Ce/La和Sm/Nd作为对比元素的FD判别函数分析，以及对一些在地球化学环境中比较稳定元素的比值进行了验证比较，初步判别研究海区的表层沉积物物质来源以现代黄河沉积物质为主，周边中小河流也对其物源产生一定的影响。
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关键词:
- 表层沉积物 /
- 稀土元素 /
- 物源 /
- 山东半岛南部近岸海域
Abstract: 147 surface sediment samples from the offshore area of the South Shandong peninsula and 46 surface sediment samples from surrounding mid-small rivers were collected for grain size and rare earth element (REE) analysis. On the basis, the distribution pattern of rare earth elements, δEu and δCe anomalies, chondrite-normalized and upper continent crust normalized rare earth elements distribution curves were systematically studied. The results show a pattern of enriched light REE (LREE), flat heavy REE (HREE) and moderate Eu anomaly in the study area. Comparing the pattern with the data from the Yangtze River, the Yellow River and the mid-small rivers from surrounding land, using Ce/La and Sm/Nd as contrasting elements for FD discriminant function analysis and verified with the ratio of some relatively stable elements, it is inferred that the surface sediments of the study area are mainly coming from the modern Yellow River, with part of the sediments from the medium and small rivers in the surrounding area. -
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