Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?

Detalhes bibliográficos
Autor(a) principal: Moreira, Noel
Data de Publicação: 2020
Outros Autores: Noronha, F, Pedro, J, Romão, J, Dias, R, Sousa, M, Ribeiro, A, Roseiro, J
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Texto Completo: http://hdl.handle.net/10174/29243
Resumo: The occurrence of a new tectono-stratigraphic terrane (Finisterra Terrane), located in the westernmost domains of the Porto-Tomar-Ferreira do Alentejo Shear Zone, has been highlighted in the last few years. Nevertheless, there are several gaps in the geological knowledge of this Terrane, including the interpretation of existing data in the framework of the new tectono-stratigraphic terrane proposal, with an independent evolution from the Iberian Terrane. This work is an approach to the mafic magmatism significance that is described in the tectono-stratigraphic units from Abrantes-Tomar and Porto-Espinho-Albergaria-a-Velha sectors of the Finisterra Terrane. The geochemical data of the amphibolite rocks show affinities with mafic and ultramafic protholits with geochemical features between within-plate basalts and MORB. These amphibolites express specific geochemical features (e.g. N-MORB normalized Ba and Th enrichments, as well as Nb and Ta anomalies), suggesting their emplacement in a back-arc basin tectonic setting.
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spelling Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?Finisterra Terrane, .mafic magmatism,geochemistry,crustal stretching,back-arc basin magmatismThe occurrence of a new tectono-stratigraphic terrane (Finisterra Terrane), located in the westernmost domains of the Porto-Tomar-Ferreira do Alentejo Shear Zone, has been highlighted in the last few years. Nevertheless, there are several gaps in the geological knowledge of this Terrane, including the interpretation of existing data in the framework of the new tectono-stratigraphic terrane proposal, with an independent evolution from the Iberian Terrane. This work is an approach to the mafic magmatism significance that is described in the tectono-stratigraphic units from Abrantes-Tomar and Porto-Espinho-Albergaria-a-Velha sectors of the Finisterra Terrane. The geochemical data of the amphibolite rocks show affinities with mafic and ultramafic protholits with geochemical features between within-plate basalts and MORB. These amphibolites express specific geochemical features (e.g. N-MORB normalized Ba and Th enrichments, as well as Nb and Ta anomalies), suggesting their emplacement in a back-arc basin tectonic setting.Comunicações Geológicas2021-03-08T10:43:22Z2021-03-082020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/29243http://hdl.handle.net/10174/29243engMoreira N., Noronha N., Pedro J., Romão J., Dias R., Sousa M., Ribeiro A., Roseiro J. (2020). Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin? Comunicações Geológicas, 107, Especial II, 29-38. https://www.lneg.pt/wp-content/uploads/2020/07/04_Moreira-et-al-Finisterra_final_29-38.pdfhttps://www.lneg.pt/wp-content/uploads/2020/07/04_Moreira-et-al-Finisterra_final_29-38.pdfndndndndndndndnd250Moreira, NoelNoronha, FPedro, JRomão, JDias, RSousa, MRibeiro, ARoseiro, Jinfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-01-03T19:26:29Zoai:dspace.uevora.pt:10174/29243Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T12:23:48.184515Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
title Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
spellingShingle Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
Moreira, Noel
Finisterra Terrane, .
mafic magmatism,
geochemistry,
crustal stretching,
back-arc basin magmatism
title_short Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
title_full Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
title_fullStr Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
title_full_unstemmed Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
title_sort Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
author Moreira, Noel
author_facet Moreira, Noel
Noronha, F
Pedro, J
Romão, J
Dias, R
Sousa, M
Ribeiro, A
Roseiro, J
author_role author
author2 Noronha, F
Pedro, J
Romão, J
Dias, R
Sousa, M
Ribeiro, A
Roseiro, J
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Moreira, Noel
Noronha, F
Pedro, J
Romão, J
Dias, R
Sousa, M
Ribeiro, A
Roseiro, J
dc.subject.por.fl_str_mv Finisterra Terrane, .
mafic magmatism,
geochemistry,
crustal stretching,
back-arc basin magmatism
topic Finisterra Terrane, .
mafic magmatism,
geochemistry,
crustal stretching,
back-arc basin magmatism
description The occurrence of a new tectono-stratigraphic terrane (Finisterra Terrane), located in the westernmost domains of the Porto-Tomar-Ferreira do Alentejo Shear Zone, has been highlighted in the last few years. Nevertheless, there are several gaps in the geological knowledge of this Terrane, including the interpretation of existing data in the framework of the new tectono-stratigraphic terrane proposal, with an independent evolution from the Iberian Terrane. This work is an approach to the mafic magmatism significance that is described in the tectono-stratigraphic units from Abrantes-Tomar and Porto-Espinho-Albergaria-a-Velha sectors of the Finisterra Terrane. The geochemical data of the amphibolite rocks show affinities with mafic and ultramafic protholits with geochemical features between within-plate basalts and MORB. These amphibolites express specific geochemical features (e.g. N-MORB normalized Ba and Th enrichments, as well as Nb and Ta anomalies), suggesting their emplacement in a back-arc basin tectonic setting.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01T00:00:00Z
2021-03-08T10:43:22Z
2021-03-08
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/10174/29243
http://hdl.handle.net/10174/29243
url http://hdl.handle.net/10174/29243
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Moreira N., Noronha N., Pedro J., Romão J., Dias R., Sousa M., Ribeiro A., Roseiro J. (2020). Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin? Comunicações Geológicas, 107, Especial II, 29-38. https://www.lneg.pt/wp-content/uploads/2020/07/04_Moreira-et-al-Finisterra_final_29-38.pdf
https://www.lneg.pt/wp-content/uploads/2020/07/04_Moreira-et-al-Finisterra_final_29-38.pdf
nd
nd
nd
nd
nd
nd
nd
nd
250
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Comunicações Geológicas
publisher.none.fl_str_mv Comunicações Geológicas
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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