Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)

Detalhes bibliográficos
Autor(a) principal: Pereira, M. F.
Data de Publicação: 2004
Outros Autores: Chichorro, M., Santos, J. F., Moita, P., Silva, J. B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/13838
Resumo: Basic rocks included in the Ossa-Morena westernmost domains (Alentejo region, Portugal) have been studied in an attempt to fill the lack of geochemical data for the Evora Massif. The selected outcrops, interpreted to belong to the Lower Paleozoic stratigraphic record, are mainly represented by amphibolites associated with metamorphosed detritic, carbonate and volcanic-sedimentary series. According to their petrography and variations of major, trace and REE elements, these basic rocks show a basaltic subalkaline tholeiitic character, plot in the within-plate and MORB fields typical of rift-related geodynamic settings. Variations of major, trace and REE elements suggest a variably enriched, heterogeneous mantle source, which was subjected to important fractionation processes and different melting rates.
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spelling Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)GeochemistryAnorogenic basic rocksLower Paleozoic seriesÉvora massifOssa-Morena zoneRift-related basic rocksGeoquímicaRocas básicas anorogenicasSeries del Paleozoico inferiorMacizo de EvoraZona de Ossa-MorenaBasic rocks included in the Ossa-Morena westernmost domains (Alentejo region, Portugal) have been studied in an attempt to fill the lack of geochemical data for the Evora Massif. The selected outcrops, interpreted to belong to the Lower Paleozoic stratigraphic record, are mainly represented by amphibolites associated with metamorphosed detritic, carbonate and volcanic-sedimentary series. According to their petrography and variations of major, trace and REE elements, these basic rocks show a basaltic subalkaline tholeiitic character, plot in the within-plate and MORB fields typical of rift-related geodynamic settings. Variations of major, trace and REE elements suggest a variably enriched, heterogeneous mantle source, which was subjected to important fractionation processes and different melting rates.Rocas básicas de los dominios occidentales de la Zona de Ossa-Morena (Alentejo, Portugal) fueron estudiadas con el objectivo de colmatar la falta de datos geoquímicos del Macizo de Évora. Los afloramientos seleccionados incluyen esencialmente anfibolitas asociadas a series detríticas, carbonatadas y volcanosedimentarias metamorfizadas del Paleozoico Inferior. Los datos petrográficos y las variaciones observadas en los elementos mayores, trazo y REE de las rocas básicas indican que son basaltos subalcalinos de carácter toleítico, proyectadas en los campos intra-placa y MORB típicos de ambientes geodinámicos de rifting. Las variaciones observadas en los elementos mayores, trazo y REE son explicadas por una fuente mantélica heterogénea variablemente enriquecida a importantes procesos de fraccionacíon y distintas tasas de fusión.Sociedad Geológica de España2015-04-20T09:17:44Z2004-01-01T00:00:00Z2004info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/13838eng0213-683XPereira, M. F.Chichorro, M.Santos, J. F.Moita, P.Silva, J. B.info: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:RCAAP2024-02-22T11:25:13Zoai:ria.ua.pt:10773/13838Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:49:34.692643Repositório 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 Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
title Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
spellingShingle Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
Pereira, M. F.
Geochemistry
Anorogenic basic rocks
Lower Paleozoic series
Évora massif
Ossa-Morena zone
Rift-related basic rocks
Geoquímica
Rocas básicas anorogenicas
Series del Paleozoico inferior
Macizo de Evora
Zona de Ossa-Morena
title_short Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
title_full Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
title_fullStr Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
title_full_unstemmed Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
title_sort Geochemistry of lower Paleozoic anorogenic basic rocks from the Evora Massif (Western Ossa-Morena Zone, Portugal)
author Pereira, M. F.
author_facet Pereira, M. F.
Chichorro, M.
Santos, J. F.
Moita, P.
Silva, J. B.
author_role author
author2 Chichorro, M.
Santos, J. F.
Moita, P.
Silva, J. B.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pereira, M. F.
Chichorro, M.
Santos, J. F.
Moita, P.
Silva, J. B.
dc.subject.por.fl_str_mv Geochemistry
Anorogenic basic rocks
Lower Paleozoic series
Évora massif
Ossa-Morena zone
Rift-related basic rocks
Geoquímica
Rocas básicas anorogenicas
Series del Paleozoico inferior
Macizo de Evora
Zona de Ossa-Morena
topic Geochemistry
Anorogenic basic rocks
Lower Paleozoic series
Évora massif
Ossa-Morena zone
Rift-related basic rocks
Geoquímica
Rocas básicas anorogenicas
Series del Paleozoico inferior
Macizo de Evora
Zona de Ossa-Morena
description Basic rocks included in the Ossa-Morena westernmost domains (Alentejo region, Portugal) have been studied in an attempt to fill the lack of geochemical data for the Evora Massif. The selected outcrops, interpreted to belong to the Lower Paleozoic stratigraphic record, are mainly represented by amphibolites associated with metamorphosed detritic, carbonate and volcanic-sedimentary series. According to their petrography and variations of major, trace and REE elements, these basic rocks show a basaltic subalkaline tholeiitic character, plot in the within-plate and MORB fields typical of rift-related geodynamic settings. Variations of major, trace and REE elements suggest a variably enriched, heterogeneous mantle source, which was subjected to important fractionation processes and different melting rates.
publishDate 2004
dc.date.none.fl_str_mv 2004-01-01T00:00:00Z
2004
2015-04-20T09:17:44Z
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/10773/13838
url http://hdl.handle.net/10773/13838
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0213-683X
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 Sociedad Geológica de España
publisher.none.fl_str_mv Sociedad Geológica de España
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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