第25卷第6期 2011年12月
现代地质 GFOSCIENCE
Vol. 25Na. 6 Dee. 2011
长江口外海域表层沉积物微量元素地球化学特征蓝先洪2，张志珣12，李日辉12，王中波2，陈晓辉12，侯方辉1,2（1.国土资源部海洋油气资源与环境地质重点实验室，山东青岛266071；2.青岛海洋地质研究所，山东青岛266071）
摘要：对采自长江口外海域187个表层沉积物的25个微量元素含量进行了标准差系数、相关分析及R型因子分析，探讨了微量元索的来源和分布特征。长江口外海域沉积物微量元素Li、V、Cr、Co、Ni、Ga、Cu、Zn、Th和Rb分布基本相似：Sr分布与Li、Cu、Pb、Zn、Th和Rb相反；研究区东南部Sr分布与生物作用有明显关系；Cd和Mo分布与粒度之间的相关性较差，主要受氧化还原环境的控制；Zr分布反映了长江物源的影响。相关分析和R型因子分析结果表明，沉积作用、粒度控制效应、海洋生物作用、氧化还原环境和源区地质背景等对长江口外海域表层沉积物中微量元索分布起着主要控制作用。
关键词：微量元索；海域表层沉积物；分布：长江口外
中图分类号：P595；P736.4
文献标志码：A
文章编号：10008527(2011)061066-11
Geochemical Characteristics of TraceElements intheMarine Surface
SedimentsOuterYangtzeRiverEstuary
LAN Xian-hong',2, ZHANG Zhi-xun'.2, LI Ri-hui',2, WANG Zhong-bo'.2
CHEN Xiao-huil-2, HOU Fang-huit,2
(1.The Key Laboralory of Marine Hydrarbon Resowes and GelogyMinitry qf Land and Resouros, Qingdo, Shandong266071, China
2. Qingdao Insitule of Marine Geology, Qingdao, Shandong 266071, China)
Abstract: This study analyzed the abundance of 25 trace elements in 187 pieces of marine surface sediments outer Yangtze River estuary using correlation analysis and R-mode factor analysis, and discussed the variation coefficient, and the source and distribution characteristics of trace elements in the sediments. Elements of Li, V, Cr, Co, Ni, Ga, Cu, Zn, Th and Rb have similar distributions, whereas Sr is negatively correlated with elements of Li, Cu, Pb, Zn, Th and Rb. The distribution of Sr in the southeast part of the study area reveals a clear link to source materials related to the biogenic process, whereas the distribution of Zr reflects the influ-ence of materials from Yangtze River. The distributions of Cd and Mo are not obviously correlaled with the type and granularity of sediments, but are mainly controlled by redox environment. The results of correlation analysis and R-mode factor analysis show that the sedimentation, grain size effect, marine biogenic process, redox envi-ronment and geological background of the source area play a dominant role in controlling the distribution of the contents of trace elements in marine surface sediments outer Yangtze River estuary.
Key words: trace element; marine surface sediment; distribution; outer Yangtze River estuary
引言 0
海域沉积物地球化学的研究已做了大量的工作，在探讨该区域沉积物化学组成、元素分布、运移、
自20世纪80年代以来，关于长江口及邻近赋存状态和沉积环境等方面取得了不少研究成
收稿日期：2011-08-26；改固日期：201110-31；贵任编辑：潘令技。基金项目：国土资源部国土资源大调查项月（1212010611301)。
作者简介：蓝先洪，男，研究员，1958年出生，地球化学专业，主要从事海洋地质与沉积地球化学研究。
Email;lanxh@qingdaonews.com