Crustal stretching process denounced by mafic magmatism in the Finisterra Terrane; the yield of a back-arc basin?
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/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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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:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:26:29Zoai:dspace.uevora.pt:10174/29243Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:19:02.869639Repositório 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 |
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: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 |
repository.mail.fl_str_mv |
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1799136672215990272 |