Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study

Detalhes bibliográficos
Autor(a) principal: Manhita, Ana
Data de Publicação: 2014
Outros Autores: Martins, Sérgio, Costa, Joana, Prazeres, Cátia, Rocha, Leonor, Dias, Cristina, Mirão, José, Teixeira, Dora
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/20807
Resumo: The chemical and mineralogical composition of the Zambujeiro Dolmen ceramics was analysed using stereomicroscopy (SM), X‐ray diffraction (XRD), in‐situ X‐ray fluorescence spectroscopy (XRF) and scanning electron microscopy with X‐Ray energy dispersive spectroscopy detection (SEM‐EDS). Analyses have shown that quartz is the most abundant mineral in the ceramics, with feldspars, especially alkali feldspars (Na, K), being also present in the majority of the samples. Titanium‐iron oxide minerals, like ilmenite, were also detected in some samples. The nature of the clay minerals varies among the samples, but it was possible to identify illite/smectite which can help approximate the firing temperature of the ceramics. Overall, the ceramics’ composition is consistent with the geology of the area, confirming the local provenance of the materials used for its production. Analysis of the organic content was done using gas chromatography coupled with mass spectrometry (GC‐MS). The ceramic's organic content is likely from vegetable origin, which can be inferred from the presence of a high content of unsaturated fatty acids, various steroids of vegetable origin (campesterol, stigmasterol and beta‐sitosterol), absence of cholesterol (steroid of animal origin) and a ratio of fatty acids C16:C18 > 1. Biomarkers for the presence of resins from the genus Pinus, the diterpenoid derivatives such as dihydroabietic and isopimaric acids, were identified in some samples. The reason for the use of resinous materials can be attributed to their sealing or gluing properties, but they could also bring a characteristic flavour to the materials stored in the ceramic vessels.
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spelling Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary studyneolithic pottery, ceramics, chemical analysis,The chemical and mineralogical composition of the Zambujeiro Dolmen ceramics was analysed using stereomicroscopy (SM), X‐ray diffraction (XRD), in‐situ X‐ray fluorescence spectroscopy (XRF) and scanning electron microscopy with X‐Ray energy dispersive spectroscopy detection (SEM‐EDS). Analyses have shown that quartz is the most abundant mineral in the ceramics, with feldspars, especially alkali feldspars (Na, K), being also present in the majority of the samples. Titanium‐iron oxide minerals, like ilmenite, were also detected in some samples. The nature of the clay minerals varies among the samples, but it was possible to identify illite/smectite which can help approximate the firing temperature of the ceramics. Overall, the ceramics’ composition is consistent with the geology of the area, confirming the local provenance of the materials used for its production. Analysis of the organic content was done using gas chromatography coupled with mass spectrometry (GC‐MS). The ceramic's organic content is likely from vegetable origin, which can be inferred from the presence of a high content of unsaturated fatty acids, various steroids of vegetable origin (campesterol, stigmasterol and beta‐sitosterol), absence of cholesterol (steroid of animal origin) and a ratio of fatty acids C16:C18 > 1. Biomarkers for the presence of resins from the genus Pinus, the diterpenoid derivatives such as dihydroabietic and isopimaric acids, were identified in some samples. The reason for the use of resinous materials can be attributed to their sealing or gluing properties, but they could also bring a characteristic flavour to the materials stored in the ceramic vessels.Laboratório Hercules, Universidade de Évora2017-03-10T17:49:43Z2017-03-102014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/20807http://hdl.handle.net/10174/20807por2183-1335Departamento de Químicandndndndndndnddmt@uevora.pt709Manhita, AnaMartins, SérgioCosta, JoanaPrazeres, CátiaRocha, LeonorDias, CristinaMirão, JoséTeixeira, Dorainfo: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:RCAAP2024-01-03T19:10:56Zoai:dspace.uevora.pt:10174/20807Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:12:11.602955Repositório 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 Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
title Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
spellingShingle Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
Manhita, Ana
neolithic pottery, ceramics, chemical analysis,
title_short Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
title_full Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
title_fullStr Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
title_full_unstemmed Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
title_sort Multi‐analytical approach for the study of Neolithic pottery from the Great Dolmen of Zambujeiro (Evora, Portugal)– a preliminary study
author Manhita, Ana
author_facet Manhita, Ana
Martins, Sérgio
Costa, Joana
Prazeres, Cátia
Rocha, Leonor
Dias, Cristina
Mirão, José
Teixeira, Dora
author_role author
author2 Martins, Sérgio
Costa, Joana
Prazeres, Cátia
Rocha, Leonor
Dias, Cristina
Mirão, José
Teixeira, Dora
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Manhita, Ana
Martins, Sérgio
Costa, Joana
Prazeres, Cátia
Rocha, Leonor
Dias, Cristina
Mirão, José
Teixeira, Dora
dc.subject.por.fl_str_mv neolithic pottery, ceramics, chemical analysis,
topic neolithic pottery, ceramics, chemical analysis,
description The chemical and mineralogical composition of the Zambujeiro Dolmen ceramics was analysed using stereomicroscopy (SM), X‐ray diffraction (XRD), in‐situ X‐ray fluorescence spectroscopy (XRF) and scanning electron microscopy with X‐Ray energy dispersive spectroscopy detection (SEM‐EDS). Analyses have shown that quartz is the most abundant mineral in the ceramics, with feldspars, especially alkali feldspars (Na, K), being also present in the majority of the samples. Titanium‐iron oxide minerals, like ilmenite, were also detected in some samples. The nature of the clay minerals varies among the samples, but it was possible to identify illite/smectite which can help approximate the firing temperature of the ceramics. Overall, the ceramics’ composition is consistent with the geology of the area, confirming the local provenance of the materials used for its production. Analysis of the organic content was done using gas chromatography coupled with mass spectrometry (GC‐MS). The ceramic's organic content is likely from vegetable origin, which can be inferred from the presence of a high content of unsaturated fatty acids, various steroids of vegetable origin (campesterol, stigmasterol and beta‐sitosterol), absence of cholesterol (steroid of animal origin) and a ratio of fatty acids C16:C18 > 1. Biomarkers for the presence of resins from the genus Pinus, the diterpenoid derivatives such as dihydroabietic and isopimaric acids, were identified in some samples. The reason for the use of resinous materials can be attributed to their sealing or gluing properties, but they could also bring a characteristic flavour to the materials stored in the ceramic vessels.
publishDate 2014
dc.date.none.fl_str_mv 2014-01-01T00:00:00Z
2017-03-10T17:49:43Z
2017-03-10
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/20807
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url http://hdl.handle.net/10174/20807
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 2183-1335
Departamento de Química
nd
nd
nd
nd
nd
nd
nd
dmt@uevora.pt
709
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dc.publisher.none.fl_str_mv Laboratório Hercules, Universidade de Évora
publisher.none.fl_str_mv Laboratório Hercules, Universidade de Évora
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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