Comparative study: archaeological ceramics from Tupiguarani’s sites located in the Brazilian states of Minas Gerais and Espírito Santo, applying the k0-NAA

Tupiguarani archaeological ceramics excavated in the Brazilian states of Minas Gerais and Espírito Santo were analysed by Neutron Activation Analysis with k 0 -NAA to determine Th, U, and rare earth elements. The results showed that ceramics from one of the two sites studied in Espírito Santo have higher mass fractions of the analysed elements and greater data variability concerning ceramics from Minas Gerais. The results are consistent with the geological context of Espírito Santo, where the formation of clay, rich in the elements studied in this work can guide preliminary studies on the origin of archaeological ceramics.