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- W2358719100 abstract "One drillcore collected from the Changjiang Estuary mud area was selected for this study.The grain size,rare earth elements(REE) and major elements were determined on the 210Pb-dated sediment core.The sediment REE provenance,main controlling factors and the responding to the sedimentary environment over the last 150 years were discussed.The total content of rare earth element(ΣREE) varies between 158.38 μg/g and 197.87 μg/g,in average of 183.49 μg/g,increasing upwards along the core.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,i.e.negative slope,the enrichment of LREE and weak depletion of HREE.The results indicate that the REE of core sediment mainly came from weathered materials of the Changjiang River and conserved the REE patterns of provenance.REE negatively correlates with Ti,Al,Fe without obvious correlation with grain sizes.Heavy minerals exert important influence on REE composition.The biogenic sedimentary matter might dilute the REE concentration of the sediment.δCe ranges between 0.94 and 1.01,decreasing slightly upwards,with an average of 0.96,showing weak negative Ce anomaly.δEu is fairly constant with obvious negative Eu anomaly,varying between 0.67 and 0.69,with an average of 0.69.The decreasing trend of δCe distribution over the last 150 years may be related to the progressive hypoxia and high productivity in the Changjiang Estuary." @default.
- W2358719100 created "2016-06-24" @default.
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- W2358719100 date "2011-01-01" @default.
- W2358719100 modified "2023-09-25" @default.
- W2358719100 title "Distributions and main controlling factors of rare earth elements in core sediments from the Changjiang Estuary mud area over the last 100 years" @default.
- W2358719100 hasPublicationYear "2011" @default.
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