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首页> 美国政府科技报告 >Modern Huanghe-Derived Muds on the Outer Shelf of the East China Sea: Identification and Potential Transport Mechanisms
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Modern Huanghe-Derived Muds on the Outer Shelf of the East China Sea: Identification and Potential Transport Mechanisms

机译：东海外层现代黄河泥浆：识别与潜在运移机制

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摘要

Outer shelf muds south of Cheju Island contain calcite in their clay fraction, derived from the Huanghe (Yellow River), not the Changjiang (Yangtze River). Radiometric dating suggests that at least the surface of this mud deposit is contemporaneous, although the rate of accumulation may be slow. Part of the sediment may be derived from present-day erosion of the ancient Huanghe submarine delta off Jiangsu Province. Suspended matter, light transmission, and hydrographic measurements indicate a south southeast transport of sediment in the East China Sea during winter, when frequent storms can resuspend sediment and force Yellow Sea water to the southeast along the Chinese coast. The spatial distribution of maximum bottom stress associated with the dominant M2 and M4 tides also suggest that tidal currents could resuspend and transport fine-grained material from the inner shelf as well as from the eastern side of the Yellow Sea. Thus the present accumulation of modern sediment south of Cheju Island probably is the result of two separate transport mechanisms acting in concert. Keywords: Tidal currents. (Reprints)

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