Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago)
Autor(a) principal: | |
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Data de Publicação: | 2003 |
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/10174/2382 |
Resumo: | We present the first neon data, as well as new helium isotopic analysis, for Terceira Island volcanic (Azores Archipelago, Portugal). Noble gases isotopic ratios show values more primitive than MORB, confirming that the Azores hotspot should be considered as sampling a relatively undegassed mantle reservoir. Our study also illustrates that the Ne systematic is more capable than He to constrain the ultimate origin of hotspots in geodynamic settings dominated by plume-ridge interaction. This is illustrated by the hyperbolic mixing inferred from the He-Ne isotopic diagram, where neon isotopic signatures show more efficiently than helium the influence of primitive undegassed material. |
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Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago)Evidência isotópica (He e Ne) para o contributo do manto inferior no magmatismo da ilha Terceira (Açores)He and NePlume-Ridge interaction, AzoresWe present the first neon data, as well as new helium isotopic analysis, for Terceira Island volcanic (Azores Archipelago, Portugal). Noble gases isotopic ratios show values more primitive than MORB, confirming that the Azores hotspot should be considered as sampling a relatively undegassed mantle reservoir. Our study also illustrates that the Ne systematic is more capable than He to constrain the ultimate origin of hotspots in geodynamic settings dominated by plume-ridge interaction. This is illustrated by the hyperbolic mixing inferred from the He-Ne isotopic diagram, where neon isotopic signatures show more efficiently than helium the influence of primitive undegassed material.Departamento de ciências da Terra e do Museu Mineralógico da Universidade de Coimbra2010-12-29T10:24:17Z2010-12-292003-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10939 bytesapplication/mswordhttp://hdl.handle.net/10174/2382http://hdl.handle.net/10174/2382eng39-47Nº 2 (Nova Série)Memórias e Notíciaslivrepedro@uevora.ptmoreira@ipgp.frjmata@fc.ul.pt396Madureira, PedroMoreira, ManuelMata, Joãoinfo: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:RCAAP2024-01-03T18:38:49Zoai:dspace.uevora.pt:10174/2382Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:58:05.594400Repositório 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 |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) Evidência isotópica (He e Ne) para o contributo do manto inferior no magmatismo da ilha Terceira (Açores) |
title |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
spellingShingle |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) Madureira, Pedro He and Ne Plume-Ridge interaction, Azores |
title_short |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
title_full |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
title_fullStr |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
title_full_unstemmed |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
title_sort |
Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago) |
author |
Madureira, Pedro |
author_facet |
Madureira, Pedro Moreira, Manuel Mata, João |
author_role |
author |
author2 |
Moreira, Manuel Mata, João |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Madureira, Pedro Moreira, Manuel Mata, João |
dc.subject.por.fl_str_mv |
He and Ne Plume-Ridge interaction, Azores |
topic |
He and Ne Plume-Ridge interaction, Azores |
description |
We present the first neon data, as well as new helium isotopic analysis, for Terceira Island volcanic (Azores Archipelago, Portugal). Noble gases isotopic ratios show values more primitive than MORB, confirming that the Azores hotspot should be considered as sampling a relatively undegassed mantle reservoir. Our study also illustrates that the Ne systematic is more capable than He to constrain the ultimate origin of hotspots in geodynamic settings dominated by plume-ridge interaction. This is illustrated by the hyperbolic mixing inferred from the He-Ne isotopic diagram, where neon isotopic signatures show more efficiently than helium the influence of primitive undegassed material. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01T00:00:00Z 2010-12-29T10:24:17Z 2010-12-29 |
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/10174/2382 http://hdl.handle.net/10174/2382 |
url |
http://hdl.handle.net/10174/2382 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
39-47 Nº 2 (Nova Série) Memórias e Notícias livre pedro@uevora.pt moreira@ipgp.fr jmata@fc.ul.pt 396 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10939 bytes application/msword |
dc.publisher.none.fl_str_mv |
Departamento de ciências da Terra e do Museu Mineralógico da Universidade de Coimbra |
publisher.none.fl_str_mv |
Departamento de ciências da Terra e do Museu Mineralógico da Universidade de Coimbra |
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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1799136464510910464 |