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Analysis of dinosaur samples by nuclear microscopy |
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| Authors: | Xiankang Wu I Orli&#x; S M Tang Yiming Wang Xiaohong Wang Jieqing Zhu |
| Affiliation: | a Department of Physics, National University of Singapore, Singapore 119260, Singapore b Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, Beijing 100037, China c Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800, China |
| Abstract: | Several dinosaur bone and eggshell fossil samples unearthed at different sites in China were analyzed by means of nuclear microscopy. Concentrations and distributions of elements such as Na, Mg, Al, P, S, Ca, Cr, Mn, Fe, Cu, Zn, As, Br, Sr, Y, Ce, Pb and U, etc. were obtained for each sample. The results of quantitative PIXE and RBS analyses show unusually high concentrations of U and Ce in several samples obtained from a period near the K-T boundary (between Cretaceous and Tertiary periods, 65 million years ago), suggesting that some form of environmental pollution could be the cause of dinosaur extinction. |
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