1. 云南省楚雄师范学院物理与电子科学系, 云南 楚雄 675000 2. National Synchrotron Light Source Brookhaven National Laboratory, New York, 11973, USA
Mapping Metal Elements of Shuangbai Dinosaur Fossil by Synchrotron X-Ray Fluorescence Microprobe
WANG Yi-lin1,YANG Qun1,Ablett J M2
1. Department of Physics and Electronic Science, Chuxiong Normal University, Chuxiong 675000, China 2. National Synchrotron Light Source Brookhaven National Laboratory, New York, 11973, USA
Abstract：The metal elements mapping of Shuangbai dinosaur fossil, was obtained by synchrotron x-ray fluorescence(SXRF). Eight elements, Ca, Mn, Fe, Cu, Zn, As, Y and Sr were determined. Elements As and Y were detected for the first time in the dinosaur fossil. The data indicated that metal elements are asymmetrical on fossil section. This is different from common minerals. Mapping metals showed that metal element As is few. The dinosaur most likely belongs to natural death, This is different from Zigong dinosaurs which were found dead from poisoning. This method has been used to find that metals Fe and Mn are accrete, and the same is ture for Sr and Y. This study indicated that colloid granule Fe and Mn, as well as Sr and Y had opposite electric charges in lithification process of fossils. By this analysis, compound forms can be ascertained. Synchrotron light source x-ray fluorescence is a complementary method that shows mapping of metal elements at the dinosaur fossil, and is rapid, exact and intuitionist. This study shows that dinosaur fossil mineral imaging has a potential in reconstructing the paleoenvironment and ancient geology.
Key words：Synchrotron x-ray fluorescence;Shuangbais dinosaur fossil;Trace element
[1] Thomas E Svarney，Patricia Barnes-Svarney(托马斯·斯瓦民，帕利期·巴尼斯). Interpret, the Handy Dinosaur Answer Book(恐龙地图). Translated by WU Li-zhi, et al(吴立志，等译). Beijing: China Changan Publishing House(北京: 中国长安出版社)，2004. 55. [2] LiSa M Mille，Randy J Smith, Meghan E Ruppel, et al. Rev. Sci. Instruments, 2005, 76: 66107. [3] ZHANG Jia-hua, YANG Fu-wang(张家华，杨甫旺). Papers of Cultural Relic and Archeology(楚雄文物考古与文化论集). HongKong: Tianma Books Company(香港：天马图书公司出版)，2002. 72. [4] YANG Qun, WANG Yi-lin(杨 群，王怡林). Journal of Optoelectronics, Laser(光电子·激光), 2004，15(11): 1365. [5] SONG Qing-chun, ZHANG Zhen-chun(宋青春，张振春). Foundation of Geology, Third ed.(地质学基础, 第3版）. Beijing: Higher Education Press(北京: 高等教育出版社), 1996. 26, 84. [6] XIA Wen-jie, LI Xiu-hua(夏文杰，李秀华). Ancient Geography Characters Analysis of Lithofacies and Burial Environment for Dinosaur(恐龙埋藏环境及岩相古地理特征分析). Chengdu: Sichuan Science and Technology Publishing Company(成都: 四川科技出版社), 1988. 29.
