Browsing by Author "Gomes, Susana Sousa"
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- O chumbo dos sistemas hidráulicos romanos no Ocidente Peninsular: proveniência e processos metalúrgicosPublication . Gomes, Susana Sousa; Araújo, Maria Fátima; Soares, Antóio M. Monge; Correia, Virgílio HipólitoNo presente trabalho foram estudadas 77 amostras constituídas por 44 fragmentos de canalizações de chumbo de Conimbriga, 21 de Augusta Emerita, seis de Mirobriga, e três amostras recolhidas em Arucci/Turobriga, uma em Fuente Seca e duas em Cortalago, sendo este último local de amostragem localizado nas proximidades da Faixa Piritosa Ibérica na província da Baetica. O estudo comparativo com os dados publicados dos depósitos mineiros da Península Ibérica mostra uma elevada sobreposição entre a assinatura isotópica do Pb das diversas canalizações de chumbo estudadas e o chumbo metálico proveniente de ocorrências mineiras da Zona da Ossa Morena e da Serra Morena ou com uma mistura deste chumbo com o chumbo proveniente da Faixa Piritosa Ibérica.
- Provenance evidence for Roman lead artefacts of distinct chronology from Portuguese archaeological sitesPublication . Gomes, Susana Sousa; Araújo, Maria de Fátima; Soares, António M. Monge; Correia, Virgílio HipólitoA set of 24 glandes plumbeae found at Alto dos Cacos, a Roman Republican military camp located in the Tagus valley, Portugal, was analysed by a quadrupole based ICP-MS to determine the tin (Sn) content and lead (Pb) isotope ratios. Results were compared with similar data previously obtained for fistulae plumbeae aquariae from Conimbriga, an important Lusitanian Roman centre during the Empire. Low Sn contents (≤0.01 wt%) were observed in 25% of glandes plumbeae indicating that were probably made with non-recycled lead. A similar situation was perceived for the set of fistulae aquariae, although most of the remaining fistulae present systematically higher Sn concentrations than those of glandes suggesting that lead recycling increased during the Empire. Pb isotope ratios distribution differentiated the analysed samples into two distinct groups: one composed by most of glandes plumbeae (15) and the other by the remaining glandes plumbeae (9) and all fistulae aquariae. The comparison with Pb isotope ratios of the published data for several lead ore deposits, exploited by the Roman in Iberian Peninsula, suggests that lead used in the manufacture of most of the glandes plumbeae would come from Linares-La Carolina, Alcudia Valley and Ossa Morena Zone. Also, some glandes could have been made using these ores, probably mixed with lead ores from Gallia Narbonensis (Southern France) or from Sardinia in the Mediterranean region. On the other hand, lead used in most fistulae aquariae came from Iberian mines, namely from Sierra Morena (Alcudia Valley and Linares-La Carolina mines) and Ossa Morena mining district, although in some cases, probably mixed with lead from the Iberian Pyrite Belt.