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苏北岸外辐射潮流沙脊群东沙浅滩沉积速率空间分布特征

蒋大亮 ,  张凌华 ,  张振克 ,  陈影影 ,  付跃鑫 ,  施晓冬

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文章导航 > 海洋地质与第四纪地质  > 2015 >  35(4): 21-27
蒋大亮, 张凌华, 张振克, 陈影影, 付跃鑫, 施晓冬. 苏北岸外辐射潮流沙脊群东沙浅滩沉积速率空间分布特征[J]. 海洋地质与第四纪地质, 2015, 35(4): 21-27. doi: 10.16562/j.cnki.0256-1492.2015.04.003
引用本文: 蒋大亮, 张凌华, 张振克, 陈影影, 付跃鑫, 施晓冬. 苏北岸外辐射潮流沙脊群东沙浅滩沉积速率空间分布特征[J]. 海洋地质与第四纪地质, 2015, 35(4): 21-27. doi: 10.16562/j.cnki.0256-1492.2015.04.003
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JIANG Daliang, ZHANG Linghua, ZHANG Zhenke, CHEN Yingying, FU Yuexin, SHI Xiaodong. THE SPATIAL DISTRIBUTION OF SEDIMENTATION RATES IN THE DONGSHA SHOAL OF RADIAL SAND RIDGES TO THE NORTH OF JIANGSU COAST[J]. Marine Geology & Quaternary Geology, 2015, 35(4): 21-27. doi: 10.16562/j.cnki.0256-1492.2015.04.003
Citation: JIANG Daliang, ZHANG Linghua, ZHANG Zhenke, CHEN Yingying, FU Yuexin, SHI Xiaodong. THE SPATIAL DISTRIBUTION OF SEDIMENTATION RATES IN THE DONGSHA SHOAL OF RADIAL SAND RIDGES TO THE NORTH OF JIANGSU COAST[J]. Marine Geology & Quaternary Geology, 2015, 35(4): 21-27. doi: 10.16562/j.cnki.0256-1492.2015.04.003
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苏北岸外辐射潮流沙脊群东沙浅滩沉积速率空间分布特征


doi: 10.16562/j.cnki.0256-1492.2015.04.003
详细信息

  • 南京大学 地理与海洋学院海岸海洋科学系, 海岸与海岛开发教育部重点实验室, 南京 210023

    • 作者简介:

    蒋大亮(1990-),男,硕士生,从事第四纪地质研究,E-mail:jdaliang@yeah.net

  • 基金项目:

    国家自然科学基金项目(41371024,41230751)

  • 中图分类号: P736.2

THE SPATIAL DISTRIBUTION OF SEDIMENTATION RATES IN THE DONGSHA SHOAL OF RADIAL SAND RIDGES TO THE NORTH OF JIANGSU COAST

More Information

  • School of Geographic and Oceanographic Sciences, the Key Laboratory of Coastal and Island Development, Ministry of Education, Nanjing University, Nanjing 210023

  • 摘要: 江苏岸外发育典型的辐射状沙脊群,沙脊群的地貌与沉积变化是海岸海洋动力地貌研究的热点领域。东沙是辐射沙脊群的重要组成部分,2012年在东沙浅滩采集了18个柱状岩心,利用210Pb方法分析了柱状岩心沉积物210Pb比活度,计算获得了东沙地区10个站位的平均沉积速率。东沙地区平均沉积速率有"西部边缘低、东部边缘高"和"南北高、中间低"的空间分布特点。辐射沙洲东沙附近地形格局和潮流对沉积速率有至关重要的影响。
    Abstract: Radial sand ridges are well developed off the Jiangsu Coast. The landforms and their changes of the ridges have been the hot spots of coastal oceanic scientific researches. The Dongsha Shoal remains in a key part of the radial sand ridges system. 18 cores were drilled in the Shoal in 2012 and using 210Pb technique, the sedimentation rates for part of these positions are measured. The spatial distribution pattern of sedimentation rates are obvious that the rates in the western edge and central part are low and those in the eastern, northern and southern edges are high. The landform characters and hydrodynamic conditions will certainly affect the spatial distribution pattern of sedimentation rates in the Dongsha Shoal.
    The hydrodynamic conditions and depositional landforms are feedbacks to each other. On the one hand, the hydrodynamic conditions are the original fact to make depositional landforms. On the other hand, depositional landforms are the factors to change the hydrodynamic conditions. It is same to the spatial distribution pattern of sedimentation rates and the landform characters in principle.
    The Dongsha Shoal is controlled by two different tidal wave systems. Due to the convergence and divergence of the tidal wave systems, the sedimentation rates are increasing from southwest to northeast. In the centre of the radial sand ridges or in the south of the Dongsha Shoal, the hydrodynamic force is weak, in comparison with that in the edge of the Dongsha Shoal. As the results, the sedimentation rates are high there. When the Xiyang tidal channel widens, the western part of the Dongsha Shoal is eroded. In the eastern part which is controlled by the wave and tide from the Pacific,the shoreline has also been eroded. The southeast has unique characteristics,affected by the tidal wave system in Chenjiawu tidal channel. With the widening of the Xiyang tidal channel, the Dongsha Shoal has an obvious tendency moving southeast.
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苏北岸外辐射潮流沙脊群东沙浅滩沉积速率空间分布特征

doi: 10.16562/j.cnki.0256-1492.2015.04.003
  • 南京大学 地理与海洋学院海岸海洋科学系, 海岸与海岛开发教育部重点实验室, 南京 210023
    • 作者简介:

    蒋大亮(1990-),男,硕士生,从事第四纪地质研究,E-mail:jdaliang@yeah.net

  • 收稿日期: 2014-09-28
  • 修回日期: 2014-10-16
基金项目:

国家自然科学基金项目(41371024,41230751)

  • 中图分类号: P736.2

摘要: 江苏岸外发育典型的辐射状沙脊群,沙脊群的地貌与沉积变化是海岸海洋动力地貌研究的热点领域。东沙是辐射沙脊群的重要组成部分,2012年在东沙浅滩采集了18个柱状岩心,利用210Pb方法分析了柱状岩心沉积物210Pb比活度,计算获得了东沙地区10个站位的平均沉积速率。东沙地区平均沉积速率有"西部边缘低、东部边缘高"和"南北高、中间低"的空间分布特点。辐射沙洲东沙附近地形格局和潮流对沉积速率有至关重要的影响。

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