New insights on Late Bronze Age Cu-metallurgy from Coles de Samuelhoard (Central Portugal): A combined multi-analytical approach

Detalhes bibliográficos
Autor(a) principal: schiavon, nicola
Data de Publicação: 2016
Outros Autores: bottaini, carlo, candeias, antonio, mirao, jose
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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spelling 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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