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Estudo de coprólito da bacia sedimentar do Araripe por meios de espectroscopia FT-IR e difração de Raios-X

2007; Brazilian Chemical Society; Volume: 30; Issue: 8 Linguagem: Inglês

10.1590/s0100-40422007000800029

ISSN

1678-7064

Autores

R. J. C. Lima, Paulo Freire, J. M. Sasaki, Antônio Álamo Feitosa Saraiva, Silvania Lanfredi, Marcos A.L. Nobre,

Tópico(s)

Ichthyology and Marine Biology

Resumo

FT-IR SPECTROSCOPY AND X-RAY DIFFRACTION.Coprolites are fossilized faeces that constitute an important source of palaeobiological informations.This paper describes the characterization of some coprolite materials originated from the Romualdo Member of the Santana Formation (Araripe Basin, south of Ceará State in Brazil) by means of two techniques: X-ray powder diffraction and Fourier transform infrared spectroscopy (FT-IR).This characterization allowed us to determine the main composition of the coprolites, of the nodulus (where the coprolites were extracted) and of the sediment (where the nodulus was found) suggesting that the material was produced by a carnivorous fish of the Lower Cretaceous.

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