New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/20980 |
Resumo: | The hoard from Coles de Samuel is one of the largest Cu-based metal collections from the Late Bronze Age (LBA) (13th–8th centuries BC) ever found in Central Portugal, consisting of 18 artefacts which typologically display a strong regional identity. In the present study, an integrated multi-analytical approach combining Energy Dispersive X-Ray Fluorescence (EDXRF) analysis, OpticalMicroscopy (OM) and Scanning ElectronMicroscopy with Energy Dispersive X-ray spectroscopy (SEM-EDS) has been used to characterise the artefacts both from a chemical and microstructural point of view with the aim to unravel their elemental composition and technological features. Results show that all artefacts are made of binary bronze (Cu-Sn) alloys, with a Sn content in the range of 8.7 ± 0.9 and 13.0±1.0wt%,with minor elements (Pb, As and Fe) never exceeding 1.1 wt% in total. The microstructure of the vast majority of the metal objects (13 out of 18) shows the presence of equiaxial α-copper grains with annealing twins and slip bands suggesting that, in the manufacturing process, they were subjected to forging plus annealing cycles. The remains of the objects present an as-cast microstructure constituted by dendritic structures, suggesting that metals did not suffer any thermo-mechanical operation after being removed from the mould. Pb, Ag and Au-rich globules together with Cu–S and unalloyed Cu-inclusions have been observed as well, resulting from impurities from ores. The typological characterisation of these metals and their archaeometallurgical data are consistentwith an indigenous LBA Iberian metallurgical production |
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New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approachCentral PortugalLate Bronze AgeMetal hoardsEDXRFSEM+EDSOprical MicroscopyThe hoard from Coles de Samuel is one of the largest Cu-based metal collections from the Late Bronze Age (LBA) (13th–8th centuries BC) ever found in Central Portugal, consisting of 18 artefacts which typologically display a strong regional identity. In the present study, an integrated multi-analytical approach combining Energy Dispersive X-Ray Fluorescence (EDXRF) analysis, OpticalMicroscopy (OM) and Scanning ElectronMicroscopy with Energy Dispersive X-ray spectroscopy (SEM-EDS) has been used to characterise the artefacts both from a chemical and microstructural point of view with the aim to unravel their elemental composition and technological features. Results show that all artefacts are made of binary bronze (Cu-Sn) alloys, with a Sn content in the range of 8.7 ± 0.9 and 13.0±1.0wt%,with minor elements (Pb, As and Fe) never exceeding 1.1 wt% in total. The microstructure of the vast majority of the metal objects (13 out of 18) shows the presence of equiaxial α-copper grains with annealing twins and slip bands suggesting that, in the manufacturing process, they were subjected to forging plus annealing cycles. The remains of the objects present an as-cast microstructure constituted by dendritic structures, suggesting that metals did not suffer any thermo-mechanical operation after being removed from the mould. Pb, Ag and Au-rich globules together with Cu–S and unalloyed Cu-inclusions have been observed as well, resulting from impurities from ores. The typological characterisation of these metals and their archaeometallurgical data are consistentwith an indigenous LBA Iberian metallurgical productionElsevier B.V.2017-05-05T13:59:41Z2017-05-052016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/20980http://hdl.handle.net/10174/20980engJournal of Archaeological Science: Reports 7,344-357doi: 10.1016/j.jasrep.2016.05.009schiavon@uevora.ptcarlo@uevora.ptcandeias@uevora.ptjmirao@uevora.pt270doi: 10.1016/j.jasrep.2016.05.009schiavon, nicolabottaini, carlocandeias, antoniomirao, joseinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:11:12Zoai:dspace.uevora.pt:10174/20980Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:12:18.572320Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
title |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
spellingShingle |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach schiavon, nicola Central Portugal Late Bronze Age Metal hoards EDXRF SEM+EDS Oprical Microscopy |
title_short |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
title_full |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
title_fullStr |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
title_full_unstemmed |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
title_sort |
New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach |
author |
schiavon, nicola |
author_facet |
schiavon, nicola bottaini, carlo candeias, antonio mirao, jose |
author_role |
author |
author2 |
bottaini, carlo candeias, antonio mirao, jose |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
schiavon, nicola bottaini, carlo candeias, antonio mirao, jose |
dc.subject.por.fl_str_mv |
Central Portugal Late Bronze Age Metal hoards EDXRF SEM+EDS Oprical Microscopy |
topic |
Central Portugal Late Bronze Age Metal hoards EDXRF SEM+EDS Oprical Microscopy |
description |
The hoard from Coles de Samuel is one of the largest Cu-based metal collections from the Late Bronze Age (LBA) (13th–8th centuries BC) ever found in Central Portugal, consisting of 18 artefacts which typologically display a strong regional identity. In the present study, an integrated multi-analytical approach combining Energy Dispersive X-Ray Fluorescence (EDXRF) analysis, OpticalMicroscopy (OM) and Scanning ElectronMicroscopy with Energy Dispersive X-ray spectroscopy (SEM-EDS) has been used to characterise the artefacts both from a chemical and microstructural point of view with the aim to unravel their elemental composition and technological features. Results show that all artefacts are made of binary bronze (Cu-Sn) alloys, with a Sn content in the range of 8.7 ± 0.9 and 13.0±1.0wt%,with minor elements (Pb, As and Fe) never exceeding 1.1 wt% in total. The microstructure of the vast majority of the metal objects (13 out of 18) shows the presence of equiaxial α-copper grains with annealing twins and slip bands suggesting that, in the manufacturing process, they were subjected to forging plus annealing cycles. The remains of the objects present an as-cast microstructure constituted by dendritic structures, suggesting that metals did not suffer any thermo-mechanical operation after being removed from the mould. Pb, Ag and Au-rich globules together with Cu–S and unalloyed Cu-inclusions have been observed as well, resulting from impurities from ores. The typological characterisation of these metals and their archaeometallurgical data are consistentwith an indigenous LBA Iberian metallurgical production |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01T00:00:00Z 2017-05-05T13:59:41Z 2017-05-05 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/20980 http://hdl.handle.net/10174/20980 |
url |
http://hdl.handle.net/10174/20980 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Archaeological Science: Reports 7,344-357 doi: 10.1016/j.jasrep.2016.05.009 schiavon@uevora.pt carlo@uevora.pt candeias@uevora.pt jmirao@uevora.pt 270 doi: 10.1016/j.jasrep.2016.05.009 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799136604916285440 |