楚雄恐龙骨化石元素同步辐射XRF研究  

Study of dinosaur fossils from Chuxiong area by synchrotron X-ray fluorescence microprobe imaging

作　　者：杨群[1] 王怡林[1] 

机构地区：[1]云南省楚雄师范学院物理与电子科学系,云南楚雄675000

出　　处：《华东师范大学学报（自然科学版）》2008年第5期110-115,共6页Journal of East China Normal University(Natural Science)

基　　金：云南省自然科学基金(05YJDTR04)

摘　　要：来自楚雄州三个县的四件恐龙骨骼化石样品采用同步辐射XRF(SR-XRF:Synchrotron Radiation X-Ray Fluorescence)检测分析。在每件化石截面上选取了1个2 mm×2 mm区域,获取了Ca,Mn,Fe,Cu,Zn,Ta,Rb,Sr和Y九种元素的分布图,其中包括首次获得的恐龙骨骼化石Ta和Rb分布图.实验表明,在不同地区的恐龙化石中各元素分布呈非均匀态.从元素分布图上可以直观准确地观察到Cu和Ta元素是组合的.恐龙化石中元素Ca和Y的分布,有的呈现Y"包裹"Ca的形式.不同地区恐龙化石,记录了它们在矿化、成岩过程中各地区不同的地质、地理和环境信息.本研究表明,同步辐射X射线荧光分析法,可原位、无损、直观地提供恐龙骨骼化石中多元素组合、相关性、分布特点等重要信息.Four dinosaur fossils from three counties of Chuxiong area were tested with synchro- tron x-ray fluorescence microprobe. The tests provide images of nine metal elements（Ca, Mn, Fe, Cu, Ta, Zn, Rb, Sr and Y） within each microarea of 2 mm× 2 mm on the fossil sections. Particularly, the images of Ta and Rb were obtained for the first time for dinosaur fossils. The results show that metal elements are heterogeneously distributed at least in the test areas. In de- tail, the distribution of Cu is similar with that of Ta. However, Ca is enveloped by Y at some ar- ea of dinosaur fossils, The work demonstrats that synchrotron light source x-ray fluorescence mi- croprobe is powerful and valuable for studing dinosaur fossils in geology and paleontology.

关 键 词：SR-XRF 恐龙骨化石 元素分布图 

分 类 号：O657.3[理学—分析化学]