Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/15925 |
Resumo: | The aim of the present morphological zircon study is to characterize the sources reservoirs involved in the generation of the different type of granites, testing the classic ‘Pupin method’ and zircon geochemistry against the petrogenetic indications given by geochemical and isotopic data. In northern Portugal large volumes of granitoids were emplaced during the last stage (D3) of the Variscan orogeny and display a wide range of petrological signatures. We studied the morphologies, internal structures and geochemistry of zircons from (1) Syn-D3 biotite granitoids: Ucanha–Vilar, Lamego, Felgueiras, Sameiro and Refoios do Lima plutons (2) Late- D3 biotite-dominant granitoids: Vieira do Minho pluton and (3)post-D3 biotite granitoids: Vila Pouca de Aguiar pluton. The typological evolutionary trends suggest a crustal or dominantly crustal origin for the syn-D3 Refois do Lima granite and for the late- D3 pluton whereas an hibridisation process is proposed for the Ucanha-Vilar, Lamego and Sameiro granites. The zircon population from the post- D3 granites define a typological evolutionary trend betweeen calc-alkaline and subalkaline granites suggesting a under crustal or mantle source. The petrogenetic model proposed by zircon typological and geochemical study in all plutons is in accordance with geochemical and isotopic data. In fact the Syn-D3 biotite granitoids display Sri ratios and εNd values varying in the range 0.7072 - 0.7116 and - 4.4 to - 6.3, and εNd = - 5.6 to - 5.7 and finally post- D3 biotite granitoids respectively; the late-D3 pluton present Sri= 0.7089-0.7090 present weakly evolved isotopic compositions, Sri = 0.7044– 0.7077 and εNd= -2.0 to -2.6. |
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Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern PortugalPortugalGraniteZirconTypologiePetrogenesisThe aim of the present morphological zircon study is to characterize the sources reservoirs involved in the generation of the different type of granites, testing the classic ‘Pupin method’ and zircon geochemistry against the petrogenetic indications given by geochemical and isotopic data. In northern Portugal large volumes of granitoids were emplaced during the last stage (D3) of the Variscan orogeny and display a wide range of petrological signatures. We studied the morphologies, internal structures and geochemistry of zircons from (1) Syn-D3 biotite granitoids: Ucanha–Vilar, Lamego, Felgueiras, Sameiro and Refoios do Lima plutons (2) Late- D3 biotite-dominant granitoids: Vieira do Minho pluton and (3)post-D3 biotite granitoids: Vila Pouca de Aguiar pluton. The typological evolutionary trends suggest a crustal or dominantly crustal origin for the syn-D3 Refois do Lima granite and for the late- D3 pluton whereas an hibridisation process is proposed for the Ucanha-Vilar, Lamego and Sameiro granites. The zircon population from the post- D3 granites define a typological evolutionary trend betweeen calc-alkaline and subalkaline granites suggesting a under crustal or mantle source. The petrogenetic model proposed by zircon typological and geochemical study in all plutons is in accordance with geochemical and isotopic data. In fact the Syn-D3 biotite granitoids display Sri ratios and εNd values varying in the range 0.7072 - 0.7116 and - 4.4 to - 6.3, and εNd = - 5.6 to - 5.7 and finally post- D3 biotite granitoids respectively; the late-D3 pluton present Sri= 0.7089-0.7090 present weakly evolved isotopic compositions, Sri = 0.7044– 0.7077 and εNd= -2.0 to -2.6.Fundação para a Ciência e a Tecnologia (FCT)GeoscienceworldUniversidade do MinhoMartins, H.Simões, P. P.2011-082011-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/15925eng1374-1520info: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:RCAAP2023-07-21T12:20:35Zoai:repositorium.sdum.uminho.pt:1822/15925Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:13:46.569491Repositório 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 |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
title |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
spellingShingle |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal Martins, H. Portugal Granite Zircon Typologie Petrogenesis |
title_short |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
title_full |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
title_fullStr |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
title_full_unstemmed |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
title_sort |
Zircon typologies and internal structures as petrogenetic indicators in contrasting variscan biotite-rich granite plutons from Northern Portugal |
author |
Martins, H. |
author_facet |
Martins, H. Simões, P. P. |
author_role |
author |
author2 |
Simões, P. P. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Martins, H. Simões, P. P. |
dc.subject.por.fl_str_mv |
Portugal Granite Zircon Typologie Petrogenesis |
topic |
Portugal Granite Zircon Typologie Petrogenesis |
description |
The aim of the present morphological zircon study is to characterize the sources reservoirs involved in the generation of the different type of granites, testing the classic ‘Pupin method’ and zircon geochemistry against the petrogenetic indications given by geochemical and isotopic data. In northern Portugal large volumes of granitoids were emplaced during the last stage (D3) of the Variscan orogeny and display a wide range of petrological signatures. We studied the morphologies, internal structures and geochemistry of zircons from (1) Syn-D3 biotite granitoids: Ucanha–Vilar, Lamego, Felgueiras, Sameiro and Refoios do Lima plutons (2) Late- D3 biotite-dominant granitoids: Vieira do Minho pluton and (3)post-D3 biotite granitoids: Vila Pouca de Aguiar pluton. The typological evolutionary trends suggest a crustal or dominantly crustal origin for the syn-D3 Refois do Lima granite and for the late- D3 pluton whereas an hibridisation process is proposed for the Ucanha-Vilar, Lamego and Sameiro granites. The zircon population from the post- D3 granites define a typological evolutionary trend betweeen calc-alkaline and subalkaline granites suggesting a under crustal or mantle source. The petrogenetic model proposed by zircon typological and geochemical study in all plutons is in accordance with geochemical and isotopic data. In fact the Syn-D3 biotite granitoids display Sri ratios and εNd values varying in the range 0.7072 - 0.7116 and - 4.4 to - 6.3, and εNd = - 5.6 to - 5.7 and finally post- D3 biotite granitoids respectively; the late-D3 pluton present Sri= 0.7089-0.7090 present weakly evolved isotopic compositions, Sri = 0.7044– 0.7077 and εNd= -2.0 to -2.6. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-08 2011-08-01T00:00:00Z |
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/1822/15925 |
url |
http://hdl.handle.net/1822/15925 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1374-1520 |
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 |
Geoscienceworld |
publisher.none.fl_str_mv |
Geoscienceworld |
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 |
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1799132577135591424 |