泉州湾表层沉积物粒度与元素地球化学特征分析  

Analysis on the grain size and the geochemical characteristics of surface sediments in Quanzhou Bay

作　　者：王兆夺[1] 于东生[1] 

机构地区：[1]国家海洋局第三海洋研究所,福建厦门361005

出　　处：《应用海洋学学报》2015年第4期568-579,共12页Journal of Applied Oceanography

基　　金：国家自然科学基金资助项目(40976037)

摘　　要：对在泉州湾内所采集的70个表层沉积物样品进行了粒度和元素化学组分分析.得到沉积物粒度、不同化学元素分别在研究区块横向上的变化特征以及沉积物粒度与元素化学含量的相关关系.结果表明大部分化学物质明显受到粒度的控制,有些化学物质的含量与粒度呈正相关(如Si O2、K2O和Ba),而有些其含量与粒度呈负相关(如Al2O3、Fe2O3、Mg O、Na2O、Ti O2、P2O5、Cu、V、Cr、Zn和Pb),还有少数化学物质含量的分布没有明显的粒度效应(如Ca、Mn、Sr和Zr).对化学元素成分进行R型因子分析,得出沉积物化学物质的含量由四个因子所控制,陆源碎屑为沉积物特征的主控因子,其余因子为次,共同决定了表层沉积物特征.结合前人研究成果,对研究区周边花岗岩成分以及其他地区和研究区的沉积物化学物质含量进行对比,认为研究区沉积物主要来源于周边花岗岩.With 70 surface sediment samples from Quanzhou Bay, we analyzed the grain size and the contents of 18 species of chemical substances. It results in horizontal distribution characters of sediments grain size and chemical element contents, besides the relationships of these two parameters. It shows that most chemical substance is appar- ently controlled by grain sizes. And some chemical substances, such as SiO2, K2O and Ba, have positive correla- tions with the grain size, except for some chemical substances, such as Al2O3, Fe2O3, MgO, Na2O, TiO2, P2O5, Cu, V, Cr, Zn and Pb, that correlated negatively with grain size. Also there are mieroelements, such as Ca,Mn, Sr and Zr, with no clear grain size effect. The R factor analysis shows that the sediment chemical substance con- tents are controlled by 4 factors. Among which the terrestrial fragments are primary factor, together with other indi-rect factors, controlling the sediment characteristics. Combining with the results of previous studies and comparing the components of surrounding granite with chemical substance contents from other areas and the study sites, we get the result that the source of sediments are mostly from the granite in nearby areas.

关 键 词：海洋地质学 沉积物粒度 地球化学 相关性 花岗岩 泉州湾 

分 类 号：P76[天文地球—海洋科学]