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An analytical study is presented, aimed to determine the elemental composition of copperbased artefacts dated back from Copper Age to Early Iron Age (mid-fourth millennium to the VIIIth century B.C.), found on the Tyrrhenian side of the peninsula, corresponding to the Lazio region.The objects belong to different archaeological contexts and had various functions.They were analysed by the X-ray fluorescence technique.The results highlight the experimental character of Copper Age metallurgy, which will later evolve in the established use of copper-tin alloys.Regarding the Bronze Age, despite the typological and functional heterogeneity of the artefacts and the wide chronological range, the alloys are relatively homogeneous in composition, with regular changes that appear related to chronology, according to what is already known for the Italian peninsula.Such changes are supposedly due to variations in the availability of tin, which was not locally mined.Early Iron Age metallurgy is represented by the Selvicciola Hoard solely, which restricts the possibility of generalizing the conclusions.A striking feature of the alloys is the great compositional difference between the complete and the fragmented artefacts.The formers are made of tin bronze, whereas in the latter tin is replaced by antimony and/or lead.The use of such unusual alloys is unlikely due to lack of metallurgical knowledge.Considering the urbanized communities that arose in the Middle-Tyrrhenian area during the Early Iron Age, we suppose that such variability in a single context might be related to a production system capable of using alloys of different quality and value to satisfy a diversified demand.
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