九龙江河口枯季沉降颗粒物及其地球化学组成研究  

The Settling Particulate Matter and Their Geochemical Compositions in Jiulongjiang Estuary in Dry Season

作　　者：方建勇[1] 陈坚[1] 张晓飞[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：《沉积学报》2011年第4期761-766,共6页Acta Sedimentologica Sinica

基　　金：国家海洋局第三海洋研究所基本科研业务费专项(编号:海三科2008003);海洋公益性行业科研专项(编号:200805064)资助

摘　　要：2009年3月28—29日在九龙江河口区采用自制沉积物捕获器分层收集沉降颗粒物,分别进行了扫描电镜、激光粒度和ICP—MS分析,并研究了沉降颗粒物的垂直通量。结果表明:各站各层沉降颗粒物类型以生物和矿物颗粒为主,絮凝体类型各站各层有所不同。各站各层之间粒度参数的变化主要是受絮凝作用的影响所致,沉降颗粒物垂直通量在各海域各层次之间变化较大。因子分析显示,影响沉降颗粒物地球化学组成分布特征的主要因素是陆源物质的输入和人类活动的影响。The settling particulate matter（SPM） was collected respectively by self-made sediment trap in Jiulongjiang estuary from March 28 to March 29 in 2009.The collected samples were analyzed using scanning electron microscope（SEM）,laser particle size analyzer and ICP-MS instrument,and the particulate vertical fluxes were caculated.SEM analysis using the LEO1530 scanning electron microscope made in Philip company in nanometer technology centre of Xiamen University（resolution for the 3 nm,the largest magnification is 30 millions times）.Grain size analysis was analyzed by Mastersizer 2000 type laser granulometer,samples were determined after ultrasonic dispersed,particle size interval for 0.25,precision is 2%,the work was done by open laboratory of ocean coast environmental geology,third institute of oceanography.ICP-MS analysis,element analysis are finished by using inductively coupled plasma mass spectrometer（Agilent 7500ce ICP-MS,American Agilent） in key laboratory of global change and marine-atmospheric chemistry,SOA.We have analyzed 47 elements,including Na,Mg,Al,K,Ca,Fe,V,Cr,Mn,Co,Ni,Cu,Zn,As,Se,Mo,Cd,Sn,Sb,Hg,Tl,Pb,Th,U,such elements（partly elements because of low content were not detected）,the instrument measuring precision standard deviation is less than 5%.Using the scales measurement accuracy for 1/100000 to calculated vertical settlement particulate flux.SEM analysis shows that biological debris and minerals are the main components of settling particulate matter,the flocculation types are different in disparate levels.Every surface and bottom are silty sand,median diameter vary slightly.The change of size parameters were effected by flocculation.The vertical flux of settlement between sea level changes greatly.The surface of settlement flux are higher than the bottom in A and C station,B staion emerge to the contrary.Settlement flux peak in B station bottom,settlement flux for 747.0 g.m-2.d-1,lowest appeared in A station bottom,settlement flux for 245.7 g m-2 d-1,investigate its reason s

关 键 词：沉降颗粒物 地球化学组成 沉降通量 九龙江河口 

分 类 号：P512.2[天文地球—地质学]