Combination of Raman, Infrared, and X-Ray Energy-Dispersion Spectroscopies and X-Ray Diffraction to Study a Fossilization Process

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• 作者：Francisco Eduardo de Sousa Filho (1) (2)
  Jo?o Hermínio da Silva (3)
  Ant?nio álamo Feitosa Saraiva (4)
  Deyvid Dennys S. Brito (4)
  Bartolomeu Cruz Viana (5)
  Bruno Tavares de Oliveira Abagaro (2)
  Paulo de Tarso Cavalcante Freire (2)
  
• 关键词：Raman spectroscopy ; Infrared spectroscopy ; X ; ray diffraction ; Fossil
• 刊名：Brazilian Journal of Physics
• 出版年：2011
• 出版时间：6 - December 2011
• 年：2011
• 卷：41
• 期：4
• 页码：275-280
• 全文大小：383 KB
• 参考文献：1. S.K. Donovan, ed. / The Processes of Fossilization. London: Belhaven Press (1991)
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• 作者单位：Francisco Eduardo de Sousa Filho (1) (2)
  Jo?o Hermínio da Silva (3)
  Ant?nio álamo Feitosa Saraiva (4)
  Deyvid Dennys S. Brito (4)
  Bartolomeu Cruz Viana (5)
  Bruno Tavares de Oliveira Abagaro (2)
  Paulo de Tarso Cavalcante Freire (2)
  
  1. Departamento de Física, Universidade Regional do Cariri, Crato-CE, Brazil
  2. Departamento de Física, Universidade Federal do Ceará, Fortaleza-CE, Brazil
  3. Universidade Federal do Ceará—Campus do Cariri, Juazeiro do Norte-CE, Brazil
  4. Departamento de Ciências Biológicas, Universidade Regional do Cariri, Crato-CE, Brazil
  5. Departamento de Física, Universidade Federal do Piauí, Teresina-PI, Brazil
  
• ISSN：1678-4448

文摘

X-ray diffraction was combined with X-ray energy-dispersion, Fourier-transform infrared, and Raman spectroscopies to study the fossilization of a Cretaceous specimen of the plant Brachyphyllum castilhoi, a fossil from the Ipubi Formation, in the Araripe Sedimentary Basin, Northeastern Brazil. Among the possible fossilization processes, which could involve pyrite, silicon oxide, calcium oxide, or other minerals, we were able to single out pyritization as the central mechanism producing the fossil, more than 100 million years ago. In addition to expanding the knowledge of the Ipubi Formation, this study shows that, when combined with other experimental techniques, Raman spectroscopy is a valuable tool at the paleontologist’s disposal.