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江苏北部潮滩沉积物中~(137)Cs和~(210)pb的分布特征(英文)
引用本文:刘志勇,潘少明,刘旭英,高建华. 江苏北部潮滩沉积物中~(137)Cs和~(210)pb的分布特征(英文)[J]. 地理学报(英文版), 2010, 20(1): 91-108. DOI: 10.1007/s11442-010-0091-3
作者姓名:刘志勇  潘少明  刘旭英  高建华
作者单位: 
基金项目:No.2002CB412401,Scientific Research Foundation of Graduate School of Nanjing University,National Natural Science Foundation of China
摘    要:

收稿时间:2008-10-29

Distribution of ~(137)Cs and ~(210)Pb in sediments of tidal flats in north Jiangsu Province
LIU Zhiyong,PAN Shaoming,LIU Xuying,GAO Jianhua. Distribution of ~(137)Cs and ~(210)Pb in sediments of tidal flats in north Jiangsu Province[J]. Journal of Geographical Sciences, 2010, 20(1): 91-108. DOI: 10.1007/s11442-010-0091-3
Authors:LIU Zhiyong  PAN Shaoming  LIU Xuying  GAO Jianhua
Affiliation:Ministry of Education Key laboratory of Coastal and Island Development, Nanjing University, Nanjing 210093, China
Abstract:Seven cores were collected from different sediment zones of tidal flats at Xin-yanggang in north Jiangsu province in August 2007. Sediment grain-size distribution and radioisotopes of ~(137)Cs and ~(210)Pb 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 ~(137)Cs and ~(210)Pb 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. ~(137)Cs and ~(210)Pb activities on the superficial layer of the cores varied spatially and the reason was discussed. On tidal flats, the fluctuation of ~(137)Cs and ~(210)Pb activities in the cores reflected the special sedimentary characteristics. Vegetation affects the grain-size distribution and the vertical profiles of ~(137)Cs and ~(210)Pb in the upper depths. ~(137)Cs and ~(210)Pb chronology got the comparable average sediment rates on the tidal flat. The characteristics of ~(137)Cs and ~(210)Pb 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.
Keywords:tidal flats  grain-size information  ~(137)Cs and ~(210)Pb dating  sediment rates  north Jiangsu province
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