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Pigmentos de pinturas rupestres pré-históricas do sítio Letreiro do Quinto, Pedro II, Piauí, Brasil

2011; Brazilian Chemical Society; Volume: 34; Issue: 2 Linguagem: Inglês

10.1590/s0100-40422011000200002

ISSN

1678-7064

Autores

Tetisuelma Leal Alves, Maria Auxiliadora Mendes Liberal de Brito, Maria Conceição Soares Meneses Lage, Luís Carlos Duarte Cavalcante, José Domingos Fabris,

Tópico(s)

Cultural Heritage Materials Analysis

Resumo

The Letreiro do Quinto rock shelter is located in the rural area of the city of Pedro II, Piauí, Brazil.The sandstone walls of the shelter are covered with prehistoric rupestrian paintings, painted in patterns of yellow and light and dark red hues.The chemicalmineralogical characterization of the prehistoric pigments was made with energy dispersive spectroscopy, scanning electron microscopy, energy dispersive X-ray fluorescence and 57 Fe transmission Mössbauer spectroscopy at 110 K. Results confirm the occurrence of hematite-and goethite-rich ochres and also that the pigment layers are indeed made of a mixture of clay minerals mixed with iron oxides.

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