Distributions and Main Controlling Factors of Rare Earth Elements in Core Sediments from the Yangtze River Estuary Mud Area over the Last 100 Years

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Distributions and Main Controlling Factors of Rare Earth Elements in Core Sediments from the Yangtze River Estuary Mud Area over the Last 100 Years

详细信息

责任者：Feng Xuwen (Second Institute of Oceanography ; State Oceanic Administration ; Hangzhou 310012 ; China) ; Shi Xuefa
刊名：Geochimica
出版年：2011
卷期：40(5)
关键词：稀土元素 ; rare earths ; 沉积物 ; sediments ; 长江口 ; Yangtze River Mouth
页码：p.464-472
图表：5 illus., 1 table, 32 refs.
分类号：0200
出版序号：20120223
issnNo：ISSN0379-1726
isbnNo：CN44-1398/P

摘要

The sediment REE provenance, main controlling factors and the responding to the sedimentary environment over the last 150 years in Yangtze River Estuary were discussed. The total content of rare earth element (ΣREE) varies between 158.38 μg/g and 197.87 μg/g. The ΣLREE/ΣHREE ratio remains relatively constant with an average of 7.90. Chondrite-normalized REE distribution patterns of samples from different depth remain the same and show riverine sediment characteristics. Heavy minerals exert important influence on REE composition. δCe ranges between 0.94 and 1.01. The decreasing trend of δCe distribution over the last 150 years may be related to the progressive hypoxia and high productivity in the Yangtze River Estuary.