Bronze Age gold in Southern Georgia
نویسندگان
چکیده
This study represents a joint pilot project between archaeological and natural sciences, aimed at exploring the technology and provenance of gold artefacts, exemplified for the case of Georgia. It is focussed on the prehistoric gold mine of Sakdrisi. The study included the investigation of both Bronze Age gold artefacts and native gold by chemical and lead isotope analyses using ICP-mass spectrometry. The analyses of the artefacts indicate that the gold which was used to manufacture the artefacts was alloyed with variable amounts of silver. Beside silver, the concentrations of platinum, osmium, and other trace elements in the gold are low. In addition to the analysis of the chemical composition, lead isotope analyses also provided insights into the provenance of the gold artefacts from the region Georgia-Anatolia-Armenia. No sophisticated treatment of the gold could be detected. Résumé : Ce travail est un projet pilote entre les sciences archéologiques et les sciences naturelles, dont le but est d’explorer les technologies et la provenance d’objets en or, présentés ici dans le cas de la Géorgie et, plus particulièrement, de la mine d’or préhistorique de Sakdrisi. Cette étude comporte l’analyse chimique et isotopique, au moyen de la technique ICP-MS, aussi bien d’objets en or datant de l’Âge du Bronze que d’or natif. L’analyse des objets a montré que l’or utilisé dans leur fabrication était allié à des concentrations variées d’argent. À côté de l’argent, les concentrations de platine, d’osmium et d’autres éléments trace de l’or sont faibles. En plus de l’analyse de la composition chimique, l’analyse des rapports isotopiques du plomb a fourni des indications sur la provenance des objets en or de la région Géorgie-Anatolie-Arménie. Aucun traitement élaboré de l’or n’a pu être identifié.
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