Distribution of radioisotopes in sediment cores from nearshore off Xinghua Bay mouth, Fujian, China

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	Distribution of radioisotopes in sediment cores from nearshore off Xinghua Bay mouth, Fujian, China
	Li, D. M. ; Xu, M. Q. ; Liu, G. S. ; Li, C. ; Liu GS(刘广山)
刊名	http://dx.doi.org/10.1007/s10967-007-0727-7
	2007-07
关键词	ACCUMULATION RATES STRAIT ANTARCTICA CARBON CS-137 PU-239,PU-240 FLUXES TH-234 PB-210
英文摘要	Two marine sediment cores were collected from nearshore off Xinghua Bay mouth in Fujian, China and the K-40, Cs-137, Pb-210, Ra-226, Ra-228, Th-228 and U-238 in the cores were measured using gamma-spectroscopy. For the core ZK6, the activities of K-40 were vertically homogeneous within measured error in the whole core and Ra-226, Ra-228 and Th-228 showed large vertical variations with the same tendency. The sedimentation rates were 0.400 cm.y(-1) above 50 cm and 0.737 cm.y(-1) below depth of 50 cm. The change of sedimentation rates indicates the heterotaxy, which was justified by the absence of Cs-137 in the zone of 25-50 cm. For core ZK6, the sedimentation rate was 0.179 cm.y(-1). Vertical distributions of K-40, Ra-226, Ra-226, Th-228 and U-238 in the core ZK18 are similar to each other although there were significant large variations with depth. The large variations of radioisotopes with depth in the cores mean that the sediment cores have been disturbed largely due to marine environment change. The mean activities of radioisotopes in the core ZK6 are higher than ZK 18 that may be ascribed to different hydrodynamic environments.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/60080]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Li, D. M.,Xu, M. Q.,Liu, G. S.,et al. Distribution of radioisotopes in sediment cores from nearshore off Xinghua Bay mouth, Fujian, China[J]. http://dx.doi.org/10.1007/s10967-007-0727-7,2007.
APA	Li, D. M.,Xu, M. Q.,Liu, G. S.,Li, C.,&刘广山.(2007).Distribution of radioisotopes in sediment cores from nearshore off Xinghua Bay mouth, Fujian, China.http://dx.doi.org/10.1007/s10967-007-0727-7.
MLA	Li, D. M.,et al."Distribution of radioisotopes in sediment cores from nearshore off Xinghua Bay mouth, Fujian, China".http://dx.doi.org/10.1007/s10967-007-0727-7 (2007).