Potential Applications of X-ray Fluorescence Core Scanner in Elemental Analyses of the Muddy Sediments on the Coastal Shelves of China and in Ecological Study  

作　　者：ZHOU Xin SUN Liguang LIU Yi WANG Yuhong 

机构地区：[1]Institute of Polar Environment & School of Earth and Space Sciences, University of Science and Technology of China [2]Advanced Management Research Center, 818 Fenghua Road, Ningbo University

出　　处：《Journal of Ocean University of China》2013年第4期619-623,共5页中国海洋大学学报（英文版）

基　　金：supported by the National Basic Research Program of China(2010CB428902);National Natural Science Foundation of China(40876088)

摘　　要：Large areas of muddy sediments on the coastal shelves of China provide important samples for studying climate and ecological changes. Analysis of a large number of such samples, which is essential for systematic study on environmental information recorded in mud areas because of complicated sedimentary environment and variable sedimentary rate, requires a fast and economical method. In this study, we investigated the potential of X-ray fluorescence core scanner （XRFS）, a fast analytical instrument for measuring the elemental concentrations of muddy sediments, and observed a significant correlation between the element concentrations of muddy sediments determined by regular X-ray fluorescence spectrometer （XRF） and XRFS, respectively. The correlations are mainly determined by excitation energy of elements, but also influenced by solubility of element ions. Furthermore, we found a striking link between A1 concentrations and marine-originated organic carbon （MOC）, a proxy of marine primary productivity. This indicates that MOC is partly controlled by sedimentary characteristics. Therefore, XRFS method has a good potential in fast analysis of a large number of muddy sediment samples, and it can also be used to calibrate MOC in ecological study of coastal seas.Large areas of muddy sediments on the coastal shelves of China provide important samples for studying climate and ecological changes.Analysis of a large number of such samples,which is essential for systematic study on environmental information recorded in mud areas because of complicated sedimentary environment and variable sedimentary rate,requires a fast and economical method.In this study,we investigated the potential of X-ray fluorescence core scanner(XRFS),a fast analytical instrument for measuring the elemental concentrations of muddy sediments,and observed a significant correlation between the element concentrations of muddy sediments determined by regular X-ray fluorescence spectrometer(XRF)and XRFS,respectively.The correlations are mainly determined by excitation energy of elements,but also influenced by solubility of element ions.Furthermore,we found a striking link between Al concentrations and marine-originated organic carbon(MOC),a proxy of marine primary productivity.This indicates that MOC is partly controlled by sedimentary characteristics.Therefore,XRFS method has a good potential in fast analysis of a large number of muddy sediment samples,and it can also be used to calibrate MOC in ecological study of coastal seas.

关 键 词：X-ray fluorescence core scanner X-ray fluorescence spectrometer muddy sediment marine-originated organic carbon ecological study 

分 类 号：P736.21[天文地球—海洋地质]