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Characteristic Elemental Compositions of the Yangtze River and Yellow River Surface Sediments and Their Geological Background 被引量:2

Characteristic Elemental Compositions of the Yangtze River and Yellow River Surface Sediments and Their Geological Background
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摘要 Significant differences are noticed in major and trace element compositions between the Yangtze River and the Yellow River surface sediments. The former sediments are rich in some major elements such as K, Fe, Mg, Al, and most of the trace elements which show wide variations in element concentrations, whereas the Yellow River sediments only have higher Ca, Na, Sr, Ba, Th, Ga, Zr, Hf contents and show slight variations in element contents. In the Yangtze River Basin are widely distributed intermediate\|acid igneous rocks and complicated source rocks together with strong chemical weathering which determine the elemental compositions of the Yangtze River sediments, while the elemental compositions of the Yellow River sediments are decided by the chemical composition of loess from the Loess Plateau and intense physical weathering. Cu, Zn, Sc, Ti, Fe, V, Ni, Cr, Co, Li and Be can be used to distinguish the Yangtze River sediments from the Yellow River sediments and be treated as tracers for both the sediments to study the processes of their mixing and diffusion in the coastal zones of China. Significant differences are noticed in major and trace element compositions between the Yangtze River and the Yellow River surface sediments. The former sediments are rich in some major elements such as K, Fe, Mg, Al, and most of the trace elements which show wide variations in element concentrations, whereas the Yellow River sediments only have higher Ca, Na, Sr, Ba, Th, Ga, Zr, Hf contents and show slight variations in element contents. In the Yangtze River Basin are widely distributed intermediate\|acid igneous rocks and complicated source rocks together with strong chemical weathering which determine the elemental compositions of the Yangtze River sediments, while the elemental compositions of the Yellow River sediments are decided by the chemical composition of loess from the Loess Plateau and intense physical weathering. Cu, Zn, Sc, Ti, Fe, V, Ni, Cr, Co, Li and Be can be used to distinguish the Yangtze River sediments from the Yellow River sediments and be treated as tracers for both the sediments to study the processes of their mixing and diffusion in the coastal zones of China.
出处 《Chinese Journal Of Geochemistry》 EI CAS 1999年第3期258-265,共8页 中国地球化学学报
基金 ThisresearchprojectwasfinanciallysupportedjointlybytheNationalNaturalScienceFoundationofChina!(No .496 76 2 88) Lab .ofMari
关键词 长江 黄河 表面沉积物 元素组成 示踪元素 Yangtze River Yellow River surface sediment elemental composition tracer
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