Comparison of INAA elemental composition data between Lago Grande and Osvaldo archaeological sites in the central Amazon: a first perspective |
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Authors: | Roberto Hazenfratz Guilherme Mongeló Casimiro S Munita Eduardo G Neves |
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Institution: | 1.Nuclear and Energy Research Institute, IPEN–CNEN/SP,University of S?o Paulo,S?o Paulo,Brazil;2.Museum of Archaeology and Ethnology,University of S?o Paulo, Museum of Archaeology and Ethnology,S?o Paulo,Brazil |
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Abstract: | In this work, 50 ceramic fragments from the Lago Grande and 30 from the Osvaldo archaeological site were compared to assess
elemental similarities. The aim is to perform a preliminary comparison between the sites, which are located in the central
Amazon, Brazil. The analytical technique employed to obtain the ceramics elemental composition was instrumental neutron activation
analysis (INAA). The data set obtained was explored by the multivariate statistical techniques of cluster, principal component
and discriminant analysis. The analyzed elements were: Na, Lu, U, Yb, La, Th, Cr, Cs, Sc, Fe, Eu, Ce and Hf. The results showed
the existence of at least two compositional groups for Lago Grande and Osvaldo. Each compositional group of Osvaldo archaeological
site matches with one group of Lago Grande. Correlated with the archaeological background, the results suggest commercial
or cultural exchange in the region, which is an indicative of socio-cultural interactions between those sites. |
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