Brazilian Journal of Physics

, Volume 41, Issue 4–6, pp 275–280 | Cite as

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

  • Francisco Eduardo de Sousa Filho
  • João Hermínio da Silva
  • Antônio Álamo Feitosa Saraiva
  • Deyvid Dennys S. Brito
  • Bartolomeu Cruz Viana
  • Bruno Tavares de Oliveira Abagaro
  • Paulo de Tarso Cavalcante Freire
General and Applied Physics


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.


Raman spectroscopy Infrared spectroscopy X-ray diffraction Fossil 



Authors thank CAPES, FUNCAP, and CNPq for partial financial support.


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Copyright information

© Sociedade Brasileira de Física 2011

Authors and Affiliations

  • Francisco Eduardo de Sousa Filho
    • 1
    • 2
  • João Hermínio da Silva
    • 3
  • Antônio 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. 1.Departamento de FísicaUniversidade Regional do CaririCrato-CEBrazil
  2. 2.Departamento de FísicaUniversidade Federal do CearáFortaleza-CEBrazil
  3. 3.Universidade Federal do Ceará—Campus do CaririJuazeiro do Norte-CEBrazil
  4. 4.Departamento de Ciências BiológicasUniversidade Regional do CaririCrato-CEBrazil
  5. 5.Departamento de FísicaUniversidade Federal do PiauíTeresina-PIBrazil

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