近3ka来东海陆架北部泥质沉积物地球化学特征  

GEOCHEMICAL CHARACTERISTICS OF RECENT 3ka MUD FROM THE NORTHERN PART OF EAST CHINA SEA

作　　者：孙晓燕[1] 李希彬[2,3] 

机构地区：[1]国家海洋信息中心,天津300171 [2]国家海洋局天津海洋环境监测中心站,天津300451 [3]天津市海洋环境监测预报中心,天津300451

出　　处：《海洋地质前沿》2012年第4期10-16,共7页Marine Geology Frontiers

基　　金：国家重点基础研究发展计划(973计划)(2005CB422304)

摘　　要：对东海陆架北部泥质区的FJ04孔进行了元素含量分析、粒度分析以及AMS14 C测年,讨论了元素含量与沉积物粒度的关系,采用R型因子分析讨论了元素间的组合关系。研究表明,近3ka来FJ04孔元素含量稳定,大部分元素含量随沉积物粒径变细呈增加趋势,Ca和Sr的含量呈减少趋势,Ba、Th和P与沉积物粒径的相关性很差。因子分析结果表明,FJ04孔元素含量变化是"元素粒度控制"、自生钙质组分加入、海水和孔隙水影响、源区风化程度以及沉积环境氧化还原状态等综合作用的体现。Based on the data of AMS14C dating, grain-size analysis and XRF analysis of Core FJ04 from the northern part of the East China Sea, using R-factor analysis as a tool, this paper discussed the relation between grain-size and elements, and the relation among elements. The results show that contents of most elements increased with grain-size decrease, except Ca and St, even the change is lit- tle during the last 3 ka. However, poor correlation exists between grain-size and contents of Ba, Th and P. Factor analysis demonstrates that the contents of elements depend upon grain-size, input of biogenetic calcium carbonate, influence of sea water and pore water, the weathering intensity of par- ent rocks and the redox process in the depositional environment.

关 键 词：东海北部泥质区 地球化学 粒径 因子分析 

分 类 号：P736.4[天文地球—海洋地质]