Non-destructive characterization of archeological Cu-based artifacts from the early metallurgy of southern Portugal

Carlo Bottaini, Antonio Brunetti, Rui Bordalo, António Valera, Nick Schiavon*

*Autor correspondente para este trabalho

Resultado de pesquisarevisão de pares

10 Citações (Scopus)

Resumo

In this study, Monte Carlo (MC) simulations combined with energy dispersive X-ray fluorescence (EDXRF) spectroscopy have been used to characterize non-destructively a collection of Cu-based artifacts recovered from two archeological sites in southern Portugal: (a) the Chalcolithic E.T.A.R. site of Vila Nova de Mil Fontes and (b) the Middle Bronze Age site of Quinta do Estácio 6. The metal artifacts show a multilayered structure made up of three distinct layers: (a) brownish carbonate soil-derived crust, (b) green oxidized corrosion patina, and (c) bulk metal. In order to assess the reliability of the EDXRF-based Monte Carlo simulations to reproduce the composition of the alloy substrate in archeological bronze artifacts without the need to previously remove the superficial corrosion and soil derived patinas, EDXRF analysis together with scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) was also performed on cleaned and patina-/crust-coated areas of the artifacts. Characterization of the mineralogical composition of the corrosion products in the surface patinas was further determined by means of X-ray diffraction (XRD). Results suggest that the adopted EDXRF/Monte Carlo protocol may represent a safe and fast analytical approach in the quantitative characterization of the bulk chemical composition of Cu-based metal artifacts even in the presence of fairly thick corrosion patinas and/or soil-derived encrustations at the surface of the archeological objects.
Idioma originalEnglish
Páginas (de-até)1903-1912
Número de páginas10
RevistaArchaeological and Anthropological Sciences
Volume10
Número de emissão8
DOIs
Estado da publicaçãoPublished - 1 dez 2018
Publicado externamenteSim

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