Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira)
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://eao.oeiras.pt/index.php/DOC/article/view/289 |
Resumo: | The full excavation of the fortified Chalcolithic settlement of Moita da Ladra by one of us (J.L.C.) has shown the existence of a single archaeological layer corresponding to the occupation of the site during the second half of the 3rd millennium BC. Among the archaeological remains collected during the field campaigns there is a bead, with a spheroid shape, longitudinally fractured, presenting a black matrix with numerous whitish spots. The fracture presents a vitreous greasy surface, and exposes a suspension cylindrical bore. Various techniques were used to identify the material that was used in the manufacture of the artifact, including CHN elemental analysis, EDXRF, μ-PIXE and XRD, conducted by the other authors. It was found that the material is not organic (carbon is absent), presenting significant amounts of the elements Si, K, Ca, Ti, Fe, Sr, Zr, and Sb. The X-ray diffraction spectra indicates that the material has na essentially vitreous nature, being the whitish particles dispersed in the vitreous mass identified as quartz. μ-PIXE results show a chemical composition that is consistent with an artificial glass, which implies a much more recent chronology for the bead than that of the Chalcolithic archaeological layer where it was recovered. Thus, although the bead was recorded from a Chalcolithic context, its provenance must be ascribed to the Late Bronze Age occupation recorded nearby and resulting from the early Phoenician trade. |
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spelling |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira)Caracterização de uma conta de vidro proveniente do povoado fortificado calcolítico da Moita da Ladra (Vila Franca de Xira)EDXRFμ-PIXEXRDGlassPhoenician tradeArqueologiaEDXRFμ-PIXEXRDGlassPhoenician tradeThe full excavation of the fortified Chalcolithic settlement of Moita da Ladra by one of us (J.L.C.) has shown the existence of a single archaeological layer corresponding to the occupation of the site during the second half of the 3rd millennium BC. Among the archaeological remains collected during the field campaigns there is a bead, with a spheroid shape, longitudinally fractured, presenting a black matrix with numerous whitish spots. The fracture presents a vitreous greasy surface, and exposes a suspension cylindrical bore. Various techniques were used to identify the material that was used in the manufacture of the artifact, including CHN elemental analysis, EDXRF, μ-PIXE and XRD, conducted by the other authors. It was found that the material is not organic (carbon is absent), presenting significant amounts of the elements Si, K, Ca, Ti, Fe, Sr, Zr, and Sb. The X-ray diffraction spectra indicates that the material has na essentially vitreous nature, being the whitish particles dispersed in the vitreous mass identified as quartz. μ-PIXE results show a chemical composition that is consistent with an artificial glass, which implies a much more recent chronology for the bead than that of the Chalcolithic archaeological layer where it was recovered. Thus, although the bead was recorded from a Chalcolithic context, its provenance must be ascribed to the Late Bronze Age occupation recorded nearby and resulting from the early Phoenician trade.Câmara Municipal de Oeiras2015-11-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://eao.oeiras.pt/index.php/DOC/article/view/289oai:openjournal.cm-oeiras.pt:article/289Estudos Arqueológicos de Oeiras; Vol. 22 (2015): Estudos Arqueológicos de Oeiras; 291-3000872-6086reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPporhttps://eao.oeiras.pt/index.php/DOC/article/view/289https://eao.oeiras.pt/index.php/DOC/article/view/289/286Direitos de Autor (c) 2022 Estudos Arqueológicos de Oeirasinfo:eu-repo/semantics/openAccessGonçalves, António P.Soares, António M. MongeOliveira, Maria JoséAlves, Luís CerqueiraValério, PedroCardoso, João Luís2022-10-21T09:55:56Zoai:openjournal.cm-oeiras.pt:article/289Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:13:37.890838Repositório 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 |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) Caracterização de uma conta de vidro proveniente do povoado fortificado calcolítico da Moita da Ladra (Vila Franca de Xira) |
title |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
spellingShingle |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) Gonçalves, António P. EDXRF μ-PIXE XRD Glass Phoenician trade Arqueologia EDXRF μ-PIXE XRD Glass Phoenician trade |
title_short |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
title_full |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
title_fullStr |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
title_full_unstemmed |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
title_sort |
Characterization of a glass bead from the Chalcolithic fortified settlement of Moita da Ladra (Vila Franca de Xira) |
author |
Gonçalves, António P. |
author_facet |
Gonçalves, António P. Soares, António M. Monge Oliveira, Maria José Alves, Luís Cerqueira Valério, Pedro Cardoso, João Luís |
author_role |
author |
author2 |
Soares, António M. Monge Oliveira, Maria José Alves, Luís Cerqueira Valério, Pedro Cardoso, João Luís |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Gonçalves, António P. Soares, António M. Monge Oliveira, Maria José Alves, Luís Cerqueira Valério, Pedro Cardoso, João Luís |
dc.subject.por.fl_str_mv |
EDXRF μ-PIXE XRD Glass Phoenician trade Arqueologia EDXRF μ-PIXE XRD Glass Phoenician trade |
topic |
EDXRF μ-PIXE XRD Glass Phoenician trade Arqueologia EDXRF μ-PIXE XRD Glass Phoenician trade |
description |
The full excavation of the fortified Chalcolithic settlement of Moita da Ladra by one of us (J.L.C.) has shown the existence of a single archaeological layer corresponding to the occupation of the site during the second half of the 3rd millennium BC. Among the archaeological remains collected during the field campaigns there is a bead, with a spheroid shape, longitudinally fractured, presenting a black matrix with numerous whitish spots. The fracture presents a vitreous greasy surface, and exposes a suspension cylindrical bore. Various techniques were used to identify the material that was used in the manufacture of the artifact, including CHN elemental analysis, EDXRF, μ-PIXE and XRD, conducted by the other authors. It was found that the material is not organic (carbon is absent), presenting significant amounts of the elements Si, K, Ca, Ti, Fe, Sr, Zr, and Sb. The X-ray diffraction spectra indicates that the material has na essentially vitreous nature, being the whitish particles dispersed in the vitreous mass identified as quartz. μ-PIXE results show a chemical composition that is consistent with an artificial glass, which implies a much more recent chronology for the bead than that of the Chalcolithic archaeological layer where it was recovered. Thus, although the bead was recorded from a Chalcolithic context, its provenance must be ascribed to the Late Bronze Age occupation recorded nearby and resulting from the early Phoenician trade. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-11-02 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://eao.oeiras.pt/index.php/DOC/article/view/289 oai:openjournal.cm-oeiras.pt:article/289 |
url |
https://eao.oeiras.pt/index.php/DOC/article/view/289 |
identifier_str_mv |
oai:openjournal.cm-oeiras.pt:article/289 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://eao.oeiras.pt/index.php/DOC/article/view/289 https://eao.oeiras.pt/index.php/DOC/article/view/289/286 |
dc.rights.driver.fl_str_mv |
Direitos de Autor (c) 2022 Estudos Arqueológicos de Oeiras info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Direitos de Autor (c) 2022 Estudos Arqueológicos de Oeiras |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Câmara Municipal de Oeiras |
publisher.none.fl_str_mv |
Câmara Municipal de Oeiras |
dc.source.none.fl_str_mv |
Estudos Arqueológicos de Oeiras; Vol. 22 (2015): Estudos Arqueológicos de Oeiras; 291-300 0872-6086 reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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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 |
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