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http://hdl.handle.net/10362/162052
Título: | Analytical Study of Overlooked Bronze Age and Iron Age Goldwork from Northwest Portugal |
Autor: | Guerra, Maria Filomena Tissot, Isabel |
Palavras-chave: | Bronze Age Iron Age Northwest Portugal gold alloys jewellery bracelet neck ornament |
Data: | 2022 |
Citação: | Guerra, M. F., & Tissot, I. (2022). Analytical Study of Overlooked Bronze Age and Iron Age Goldwork from Northwest Portugal. Metalla, 26(1), 3-23. https://doi.org/10.46586/metalla.v26.2022.i1.3-23 |
Resumo: | To gain further insight into the use of native gold and intentional gold alloys during the Bronze Age in Northwest Portugal, jewellery in the collections of three Portuguese museums was studied using an in-house built portable X-ray fluorescence spectrometer. Among the analysed objects are the Late Bronze Age bracelet from Monte Airoso (Viseu) and the Iron Age tubular bracelet from Regoufe (Aveiro). To shed more light on the manufacture of gold bracelets, have also been analysed all the components (bracelets, wires and bands) of the hoard of Arnozela (Braga), so far incompletely studied. The results obtained show that from the Middle Bronze Age onwards gold containing 8-11 wt.% silver is used, to which gradually increasing amounts of copper seem to have been added over time. These results support a heterogeneous chronology for the components of the hoard of Arnozela and show that the bracelet from Monte Airoso is made from an intentional gold alloy used in the Portuguese area during the Late Bronze Age. On the contrary, the bracelet from Regoufe is made from native gold without addition of copper. This could indicate that at least during a certain period the goldsmiths used both native gold as found and intentional alloys. Two other objects, discussed on the light of the data obtained for the bracelets, complete the study. One of them is one of the two Portuguese Early Bronze Age gold sheet ornaments with cut parallel bands (so-called gargantilha de tiras), found in Braga. Without obvious signs of use-wear like other ornaments of the same type, and made, as expected, with gold hammered into sheet, this ornament is made from an alloy that seems to correspond to a later period using gold from another origin. Finally, the composition of some of the components of the Late Bronze Age-Iron Age string from Malhada (Vila Real), a set of gold decorated plaques made from punched gold sheet by using different and asymmetrical punches, supports the addition of small amounts of copper to gold to produce intentional alloys. |
Descrição: | The authors wish to express their gratitude to the Director of the National Museum of Archaeology in Lisbon, Dr. António Carvalho, to the Judge of the Royal Brotherhood of Holy Queen Mafalda of Arouca, Prof. Arnaldo Cardoso Pinho, and to Dr. Maria José de Carvalho e Sousa, Gold Museum of Travassos, for making possible the analytical study of the objects. We are also grateful to Matthias Tissot, Conservator-restorer at Archeofactu-Arqueologia e Arte for his support during the study. Part of the study was carried out with the financial support of funded project AuCORRE (PTDC/HISHIS/114698/2009). |
Peer review: | yes |
URI: | http://hdl.handle.net/10362/162052 |
DOI: | https://doi.org/10.46586/metalla.v26.2022.i1.3-23 |
Aparece nas colecções: | Home collection (FCT) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Analytical_Study_of_Overlooked_Bronze_Age.pdf | 3,17 MB | Adobe PDF | Ver/Abrir |
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