Vol. 44 (2019), pp. 10–21 • 995 KB • português
Chemical-Structural Similarities between Pigments of Pre-Colonial Rock Paintings from São Miguel do Tapuio, Piaui, Northeast Brazil

Marcos Jadiel Alves, Wilkins Oliveira de Barros, Bruna de Souza Lopes,
Benedito Batista Farias Filho, Claudevan Alvino de Sousa,
Francisco Eroni Paz dos Santos, Aline Freitas,
Maria Conceição Soares Meneses Lage

Arqueol. Iberoam.

The chemical and mineralogical characterization of rock paintings of the Agreste and Geometric traditions of the Descoberta and Saco do Cipó archaeological sites, Piauí, Brazil was performed by the archaeometrical techniques: (i) benchtop and portable X-ray fluorescence (FRX) by energy dispersion, and (ii) Raman spectroscopy. The results show large amounts of silicon, aluminum, phosphorus, sulfur, potassium, calcium and iron. Rock paintings of different shades of color were prepared with hematite-rich materials (α-Fe2O3). Raman spectroscopy allowed the identification of hematite iron oxide and anatase titanium oxide (TiO2), as well as many quartz crystals (SiO2). The similarities in the chemical-mineralogical composition of the rock paintings on both traditions indicate that they have the same elemental composition and that raw materials from the same source area were probably used in their processing.

Archaeometry; Raman spectroscopy; Agreste Tradition; Geometric Tradition; Chemical-mineralogical composition.

Cite as
Alves, M. J., W. O. Barros, B. S. Lopes, B. B. Farias F., C. A. Sousa, F. E. P. Santos, A. Freitas, M. C. S. M. Lage. 2019. Semelhanças químico-estruturais entre pigmentos de pinturas rupestres pré-coloniais de São Miguel do Tapuio, Piauí, Nordeste do Brasil. Arqueología Iberoamericana 44: 10-21.

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Publication date: October 7, 2019.

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