Distribution of 137Cs and 210Pb in sediments of tidal flats in north Jiangsu Province
Distribution of 137Cs and 210Pb in sediments of tidal flats in north Jiangsu Province
复制标题
苏北滩涂沉积物中137Cs和210Pb的分布
DOI：
10.1007/s11442-010-0091-3
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发表时间：
2010-02
期刊：
影响因子：
--
通讯作者：
Gao Jianhua
中科院分区：
文献类型：
--
作者：
Liu Xuying;Pan Shaoming;Liu Zhiyong;Gao Jianhua
2007年8月在苏北新洋港潮滩不同沉积带采集了7个柱状样。沉积物粒度分布和放射性同位素的137 Cs和210 Pb的分析进行了这些核心。根据137 Cs和210 Pb的放射性活度，计算了潮滩不同带表层沉积物的沉积速率和放射性同位素分布。结果表明，各潮带经历了不同的演变阶段，潮滩水文动力作用使表层沉积物粒度逐渐发生变化。岩芯表层~（137）Cs和~（210）Pb的活度在空间上存在差异，并对其原因进行了讨论。潮滩沉积物中137 Cs和210 Pb的活度变化反映了潮滩沉积物的特殊沉积特征。植被影响137 Cs和210 Pb的粒度分布和垂直剖面。~（137）Cs和~（210）Pb年代学得到了潮滩可比的平均沉积速率。岩芯中137 Cs和210 Pb的特征反映了不同潮汐带不同的沉积动力学环境，提供了潮汐带不同演化阶段的信息。根据沉积物的粒度分布、结构、沉积速率和地形等信息，重建了潮滩的演变线。
Seven cores were collected from different sediment zones of tidal flats at Xinyanggang in north Jiangsu province in August 2007. Sediment grain-size distribution and radioisotopes of 137Cs and 210Pb analysis were carried out for these cores. Sediment rates of the cores and radioisotopes distribution in surface sediment in different zones of the tidal flat were calculated from the 137Cs and 210Pb activities in sediments cores. The results indicated that each tidal zone had experienced different evolution phases, hydrological dynamics in the tidal flats made the grain-size of the surface sediment change gradually. 137Cs and 210Pb activities on the superficial layer of the cores varied spatially and the reason was discussed. On tidal flats, the fluctuation of 137Cs and 210Pb activities in the cores reflected the special sedimentary characteristics. Vegetation affects the grain-size distribution and the vertical profiles of 137Cs and 210Pb in the upper depths. 137Cs and 210Pb chronology got the comparable average sediment rates on the tidal flat. The characteristics of 137Cs and 210Pb in the cores reflected various depositional dynamical environments in different tidal zones and gave information on the different evolvement phases of the tidal zones. Based on the information of grain-size distribution, texture of the cores, sediment rates and topography, the evolution lines of the tidal flat were reconstructed.
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影响因子：
2.9
作者：
Liu Zhi-yong
通讯作者：
Liu Zhi-yong
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
--
作者：
W. Xiao
通讯作者：
W. Xiao
DOI：
--
发表时间：
1988-04
期刊：
--
影响因子：
--
作者：
M. John
通讯作者：
M. John
影响因子：
2.3
作者：
R. Periáñez
通讯作者：
R. Periáñez
影响因子：
3.4
作者：
A. Cundy;I. Croudace;A. Cearreta;M. J. Irabien
通讯作者：
A. Cundy;I. Croudace;A. Cearreta;M. J. Irabien