Element geochemistry of Holocene sediment and paleoenvironmental change in the Changjiang Estuary |
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| Authors: | Shouye Yang Congxian Li Quanhong Zhao Saito Yoshiki Hori Kazuaki |
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| Institution: | 1.Laboratory of Marine Geology,Tongji University,Shanghai,China;2.Marine Geology Department,Geological Survey of Japan,Tsukuba lbaraki,Japan |
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| Abstract: | Analyses of 41 elements reveal that Holocene sediments in the Changjiang Estuary bear regular elemental compositions in different sedimentary environments, and Holocene sediments came mainly from the Changjiang River based on compositions of REEs and most trace elements. Some heavy metals are more enriched in the surface sediment than in the deltaic sediments, reflecting human impact. Elemental compositions of the river channel sediment are related to the influence of proximal sediments. Sedimentary environments exert some influences on elemental compositions. Some chemical indices can be used to record chemical weathering undergone by the Changjiang sediment and environmental change. |
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