地质通报2016，Vol.35Issue(10)：1622-1629,8.
渤海湾海岸带地区137Cs参考剖面--意义、方法及初步结果
Local 137Cs reference profile on Bohai Bay:Implications, methods and initial results
摘要
Abstract
Reconstruction of geological processes during the last hundred years needs accurate dating methods. 137Cs and 210Pb dating methods are widely used at present. As coastal areas are vulnerable to the changes of river sediment supply, the local tidal conditions, and the effects of extreme weather events, the quantitative descriptions of their modern processes have been a bottleneck for the high-resolution studies. Regional reference-profiles can help improve the precision of modern sediments dating. If regional 210Pbexc and 137Cs reference-profiles could be established, they will play a very positive role in the interpretation of the dating results of modern sediments. In this paper, the relatively stable salt-marsh sites with little transported activity were selected along the coastal areas of Bo⁃hai Bay. Based on systematic sampling of trench walls and Eijkelkamp cores, the authors measured the 210Pb, 226Ra and 137Cs activities of subsamples byγspectrometer, combined with the existing data in the study area. Consequently, the local reference-profiles were established, six types of 210Pbexc and 137Cs activity-depth profiles were summarized, and the 137Cs regional reference-profiles were pre⁃limiarily obtained. 137Cs maximum peak in the Bohai Bay is correlated with 1963, which could be used as the main time-marker of the coastal area. However, the second peak above the maximum peak detected in some cores can not be correlated with 1986 but is actually controlled by local environmental factors such as those indiacated at sites S 4 and S5.关键词
210Pbexc/137Cs/参考剖面/海岸带/渤海湾Key words
210Pbexc/137Cs/reference profiles/coast/Bohai Bay分类
海洋科学引用本文复制引用
王福,田立柱,姜兴钰,李建芬,杨彪,袁海帆,王宏..渤海湾海岸带地区137Cs参考剖面--意义、方法及初步结果[J].地质通报,2016,35(10):1622-1629,8.基金项目
国家自然科学基金项目（批准号41206069）和中国地质调查局百名青年地质英才培养计划 （）
