Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/21090 |
Resumo: | During the Neolithic period amphibolite is a raw material that seems to have been highly regarded for its hard and durable qualities, and used in the production of ground stone tools [1]. Less noticeable has been the use of amphibolite as building material, namely slabs as described in [2]. In fact, this type of rock outcrop is less abundant than e.g. a granite and does not allow the extraction of blocks large enough to be used as anchors of medium and big size dolmens. Rabuje 5 (R5) is a small dolmen dated to the middle-second half of the 4th millennium BCE [3], located in Monforte, (Portugal). This tomb is of particular interest to be used as a case study since it was built solely with slabs of amphibolite, and within only amphibolite ground stone tools were found. This study aims to compare, through μXRD, the provenance of amphibolite artefacts and slabs from R5 with those of outcrops located at a distance less than 1000 meters. In this sense three ground stone tools (two axes and one adze), two sampled slabs, and one outcrop sample were analysed. μXRD is a powerful non-destructive technique that allows the identification of crystalline phases of a rock/artefact. Because amphibolite is a very strong anisotropic lithology (minerals are aligned defining a lineation) it were performed analyses with the samples with several orientation that nevertheless gave similar results. The μXRD results (Fig.1), suggests a different provenance for axe and slabs. The mineralogy of the slab matches the mineralogy of the nearby outcrop (namely hornblende and albite), whereas the axe diffractogram does not exhibit hornblende but actinolite. In a preliminary conclusion the slabs come from the studied and nearby outcrop; similar mineralogical composition, and compatible dimensions, however axe was produced from different source/outcrop. |
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Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffractionamphiboliteaxes and adzesmicro-XRDprovenencesDuring the Neolithic period amphibolite is a raw material that seems to have been highly regarded for its hard and durable qualities, and used in the production of ground stone tools [1]. Less noticeable has been the use of amphibolite as building material, namely slabs as described in [2]. In fact, this type of rock outcrop is less abundant than e.g. a granite and does not allow the extraction of blocks large enough to be used as anchors of medium and big size dolmens. Rabuje 5 (R5) is a small dolmen dated to the middle-second half of the 4th millennium BCE [3], located in Monforte, (Portugal). This tomb is of particular interest to be used as a case study since it was built solely with slabs of amphibolite, and within only amphibolite ground stone tools were found. This study aims to compare, through μXRD, the provenance of amphibolite artefacts and slabs from R5 with those of outcrops located at a distance less than 1000 meters. In this sense three ground stone tools (two axes and one adze), two sampled slabs, and one outcrop sample were analysed. μXRD is a powerful non-destructive technique that allows the identification of crystalline phases of a rock/artefact. Because amphibolite is a very strong anisotropic lithology (minerals are aligned defining a lineation) it were performed analyses with the samples with several orientation that nevertheless gave similar results. The μXRD results (Fig.1), suggests a different provenance for axe and slabs. The mineralogy of the slab matches the mineralogy of the nearby outcrop (namely hornblende and albite), whereas the axe diffractogram does not exhibit hornblende but actinolite. In a preliminary conclusion the slabs come from the studied and nearby outcrop; similar mineralogical composition, and compatible dimensions, however axe was produced from different source/outcrop.2017-06-14T12:22:00Z2017-06-142015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/21090http://hdl.handle.net/10174/21090porMoita P, Mirão J, Prazeres C, Boaventura R (2015). Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using micro-X ray diffraction. Book of Abstracts, P1-167.naonaosimpmoita@uevora.ptjmirao@uevora.ptndrui.boaventura@campus.ul.ptMoita, PatríciaMirão, JoséPrazeres, CátiaBoaventura, Ruiinfo: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:RCAAP2024-01-03T19:11:25Zoai:dspace.uevora.pt:10174/21090Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:12:23.559062Repositório 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 |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
title |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
spellingShingle |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction Moita, Patrícia amphibolite axes and adzes micro-XRD provenences |
title_short |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
title_full |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
title_fullStr |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
title_full_unstemmed |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
title_sort |
Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using Micro-X ray Diffraction |
author |
Moita, Patrícia |
author_facet |
Moita, Patrícia Mirão, José Prazeres, Cátia Boaventura, Rui |
author_role |
author |
author2 |
Mirão, José Prazeres, Cátia Boaventura, Rui |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Moita, Patrícia Mirão, José Prazeres, Cátia Boaventura, Rui |
dc.subject.por.fl_str_mv |
amphibolite axes and adzes micro-XRD provenences |
topic |
amphibolite axes and adzes micro-XRD provenences |
description |
During the Neolithic period amphibolite is a raw material that seems to have been highly regarded for its hard and durable qualities, and used in the production of ground stone tools [1]. Less noticeable has been the use of amphibolite as building material, namely slabs as described in [2]. In fact, this type of rock outcrop is less abundant than e.g. a granite and does not allow the extraction of blocks large enough to be used as anchors of medium and big size dolmens. Rabuje 5 (R5) is a small dolmen dated to the middle-second half of the 4th millennium BCE [3], located in Monforte, (Portugal). This tomb is of particular interest to be used as a case study since it was built solely with slabs of amphibolite, and within only amphibolite ground stone tools were found. This study aims to compare, through μXRD, the provenance of amphibolite artefacts and slabs from R5 with those of outcrops located at a distance less than 1000 meters. In this sense three ground stone tools (two axes and one adze), two sampled slabs, and one outcrop sample were analysed. μXRD is a powerful non-destructive technique that allows the identification of crystalline phases of a rock/artefact. Because amphibolite is a very strong anisotropic lithology (minerals are aligned defining a lineation) it were performed analyses with the samples with several orientation that nevertheless gave similar results. The μXRD results (Fig.1), suggests a different provenance for axe and slabs. The mineralogy of the slab matches the mineralogy of the nearby outcrop (namely hornblende and albite), whereas the axe diffractogram does not exhibit hornblende but actinolite. In a preliminary conclusion the slabs come from the studied and nearby outcrop; similar mineralogical composition, and compatible dimensions, however axe was produced from different source/outcrop. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01T00:00:00Z 2017-06-14T12:22:00Z 2017-06-14 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/21090 http://hdl.handle.net/10174/21090 |
url |
http://hdl.handle.net/10174/21090 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Moita P, Mirão J, Prazeres C, Boaventura R (2015). Amphibolite; tools, slabs and outcrops. A preliminary study of provenances using micro-X ray diffraction. Book of Abstracts, P1-167. nao nao sim pmoita@uevora.pt jmirao@uevora.pt nd rui.boaventura@campus.ul.pt |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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