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首页> 外文期刊>Journal of Asian earth sciences >Clay mineralogy indicates the muddy sediment provenance in the estuarine- inner shelf of the East China Sea
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Clay mineralogy indicates the muddy sediment provenance in the estuarine- inner shelf of the East China Sea

机译：粘土矿物学表明东海河口-内陆架泥质沉积物来源

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摘要

Graphical abstractDisplay OmittedHighlights•High-resolution clay minerals record in the estuarine-inner shelf of the ECS over the past 100 years.•The sediments on the estuarine-inner shelf of the ECS are a mixture of provenances from the Yangtze and Yellow Rivers as well as smaller rivers.•The river sediment loads, East Asian winter monsoon and coastal current play a critical role for sediment transport in the estuarine-inner shelf of the ECS.AbstractThe estuarine-inner shelf mud regions of the East China Sea (ECS) are valuable for studying the source-to-sink processes of fluvial sediments deposited since the Holocene. In this study, we present evidence of the provenance and environmental evolution of two cores (S5-2 and JC07) from the estuarine-inner shelf regions of the ECS over the past 100 years based on210Pb dating, high-resolution grain size measurements and clay mineral analyses. The results indicate that the clay mineral assemblages of cores S5-2 and JC07 are dominated by illite, followed by kaolinite and chlorite, and present scarce amounts of smectite. A comparison of these clay mineral assemblages with several major sources reveals that the fine sediments on the estuarine-inner shelf of the ECS represent a mixture of provenances associated with the Yangtze and Yellow Rivers, as well as smaller rivers. However, the contribution of each provenance has varied greatly over the past hundred years, as indicated by the down-core variability due to strong sediment reworking and transport on the inner shelf and the reduction of the sediment load from the Yangtze River basin. In the mud region of the Yangtze River estuary, the sediment from 1930 to 1956 was primarily derived from the Yangtze River, although the Yellow River was also an important influence. From 1956 to 2013, the Yellow River contribution decreased, whereas the Yangtze River contribution correspondingly increased. In the Zhe-Min mud region, the Yangtze River contributed more sediment than did other rivers from 1910 to 1950; however, the Yangtze River contribution gradually decreased from 1950 to 2013. Moreover, the other small rivers accounted for minor contributions, and the East Asian winter monsoon (EAWM) played an important role in the sediment transport process in the ECS. Our results indicate that the weakening/strengthening of the EAWM and a decrease in the sediment load of the Yangtze River influenced the transport and fate of sediment on the estuarine-inner shelf of the ECS.
机译： 图形摘要 省略显示 突出显示 • 过去100年来ECS河口内层的高分辨率粘土矿物记录。 • 该河口内架上的沉积物ECS是长江和黄河以及较小河流的出处的混合体。 • 河流沉积物负荷，东亚冬季风和沿海水流对ECS河口-内陆沉积物的运输至关重要。 摘要 东海（ECS）的河口-内陆架泥质区对于研究全新世以来沉积的河流沉积物的源-汇过程具有重要意义。在本研究中，我们基于提供了过去100年来ECS的河口-内陆架区两个核心（S5-2和JC07）的出处和环境演变的证据。 210 铅定年，高分辨率粒度测量和粘土矿物分析。结果表明，岩心S5-2和JC07的粘土矿物组合以伊利石为主，其次是高岭石和绿泥石，并且存在少量的蒙脱石。将这些粘土矿物组合与几种主要来源进行比较后发现，ECS河口-内陆架上的细小沉积物代表了与长江，黄河以及较小河流相关的物源的混合物。然而，在过去的一百年中，每种来源的贡献发生了很大的变化，这主要是由于内陆架子上强大的泥沙再造和运输以及长江流域泥沙负荷的减少所导致的下游变化。在长江口的泥沙区，1930年至1956年的沉积物主要来自长江，尽管黄河也是重要的影响。从1956年到2013年，黄河贡献减少，而长江贡献相应增加。在浙闽泥质地区，从1910年到1950年，长江比其他河流贡献了更多的泥沙。然而，长江的贡献在1950年至2013年间逐渐下降。此外，其他小河流所占的贡献也很小，东亚冬季风（EAWM）在ECS的泥沙输送过程中起着重要作用。我们的研究结果表明，EAWM的减弱/加强和长江沉积物负荷的减少影响了ECS河口-内陆架上沉积物的运输和命运。

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  • 来源
    《Journal of Asian earth sciences》 |2018年第2期|69-79|共11页
  • 作者

    Yifei Zhao; Xinqing Zou; Qing Liu; Chenglong Wang; Chendong Ge; Min Xu;

  • 作者单位

    School of Geographic Sciences, Nanjing Normal University,Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education,State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province),Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application;

    School of Geographic and Oceanographic Sciences, Nanjing University,Ministry of Education Key Laboratory for Coastal and Island Development, Nanjing University;

    School of Geographic Sciences, Nanjing Normal University,Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education,State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province),Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application;

    School of Geographic and Oceanographic Sciences, Nanjing University,Ministry of Education Key Laboratory for Coastal and Island Development, Nanjing University;

    School of Geographic and Oceanographic Sciences, Nanjing University,Ministry of Education Key Laboratory for Coastal and Island Development, Nanjing University;

    School of Geographic Sciences, Nanjing Normal University,Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education,State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province),Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sediment provenance; Clay minerals; Source-to-sink; Yangtze River; Estuarine-inner shelf; East China Sea (ECS);

    机译：沉积物来源;粘土矿物;源下沉;长江;河口-内陆架;东海（ECS）;

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