Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies

Detalhes bibliográficos
Autor(a) principal: Antunes, I.M.H.R.
Data de Publicação: 2010
Outros Autores: Neiva, A.M.R., Silva, M.M.V.G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.11/867
Resumo: Five granitic rocks, concentrically disposed from core to rim, were distinguished in the Castelo Branco pluton. U-Pb-Th electron microprobe monazite ages from granitic rocks are similar and ranging between 297-303 Ma. The granitic rocks from Castelo Branco pluton are 310 ± 1 Ma old, obtained by U-Pb (ID-TIMS) in separated zircon and monazite crystals, indicating a similar emplacement age for all granitic rocks of the pluton. Initial 87Sr/86Sr isotopic ratios and εNd310 and δ18O values suggest three distinct pulses of granitic magma and that they are derived from partial melting of heterogeneous metasedimentary materials. The other granitic rocks are related by magmatic differentiation and show small variations in (87Sr/86Sr)310, εNd310 and δ18O. The granitic pluton of Castelo Branco shows a rare reverse zoning.
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spelling Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologiesGeochronologyZirconMonaziteCastelo Branco plutonFive granitic rocks, concentrically disposed from core to rim, were distinguished in the Castelo Branco pluton. U-Pb-Th electron microprobe monazite ages from granitic rocks are similar and ranging between 297-303 Ma. The granitic rocks from Castelo Branco pluton are 310 ± 1 Ma old, obtained by U-Pb (ID-TIMS) in separated zircon and monazite crystals, indicating a similar emplacement age for all granitic rocks of the pluton. Initial 87Sr/86Sr isotopic ratios and εNd310 and δ18O values suggest three distinct pulses of granitic magma and that they are derived from partial melting of heterogeneous metasedimentary materials. The other granitic rocks are related by magmatic differentiation and show small variations in (87Sr/86Sr)310, εNd310 and δ18O. The granitic pluton of Castelo Branco shows a rare reverse zoning.CSICRepositório Científico do Instituto Politécnico de Castelo BrancoAntunes, I.M.H.R.Neiva, A.M.R.Silva, M.M.V.G.2011-10-20T15:03:37Z20102010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.11/867engANTUNES, I.M.H.R. ; NEIVA, A.M.R. ; SILVA, M.M.V.G. (2010) - Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies. Estudios Geologicos. ISSN 0367-0449. 66, n.º 1, p. 45-50.0367-0449info: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:RCAAP2023-01-16T11:37:59Zoai:repositorio.ipcb.pt:10400.11/867Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:32:25.987036Repositório 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 Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
title Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
spellingShingle Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
Antunes, I.M.H.R.
Geochronology
Zircon
Monazite
Castelo Branco pluton
title_short Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
title_full Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
title_fullStr Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
title_full_unstemmed Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
title_sort Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies
author Antunes, I.M.H.R.
author_facet Antunes, I.M.H.R.
Neiva, A.M.R.
Silva, M.M.V.G.
author_role author
author2 Neiva, A.M.R.
Silva, M.M.V.G.
author2_role author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico de Castelo Branco
dc.contributor.author.fl_str_mv Antunes, I.M.H.R.
Neiva, A.M.R.
Silva, M.M.V.G.
dc.subject.por.fl_str_mv Geochronology
Zircon
Monazite
Castelo Branco pluton
topic Geochronology
Zircon
Monazite
Castelo Branco pluton
description Five granitic rocks, concentrically disposed from core to rim, were distinguished in the Castelo Branco pluton. U-Pb-Th electron microprobe monazite ages from granitic rocks are similar and ranging between 297-303 Ma. The granitic rocks from Castelo Branco pluton are 310 ± 1 Ma old, obtained by U-Pb (ID-TIMS) in separated zircon and monazite crystals, indicating a similar emplacement age for all granitic rocks of the pluton. Initial 87Sr/86Sr isotopic ratios and εNd310 and δ18O values suggest three distinct pulses of granitic magma and that they are derived from partial melting of heterogeneous metasedimentary materials. The other granitic rocks are related by magmatic differentiation and show small variations in (87Sr/86Sr)310, εNd310 and δ18O. The granitic pluton of Castelo Branco shows a rare reverse zoning.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-01-01T00:00:00Z
2011-10-20T15:03:37Z
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/10400.11/867
url http://hdl.handle.net/10400.11/867
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv ANTUNES, I.M.H.R. ; NEIVA, A.M.R. ; SILVA, M.M.V.G. (2010) - Isotopic geochronology of granitic rocks from the Central Iberian Zone: comparison of methodologies. Estudios Geologicos. ISSN 0367-0449. 66, n.º 1, p. 45-50.
0367-0449
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv CSIC
publisher.none.fl_str_mv CSIC
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
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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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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