Helium and Neon isotopic constraints to the lower mantle contribution for Terceira Island magmatism (Azores Archipelago)

Bibliographic Details
Main Author: Madureira, Pedro
Publication Date: 2003
Other Authors: Moreira, Manuel, Mata, João
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10174/2382
Summary: 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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spelling 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:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-01-03T18:38:49Zoai:dspace.uevora.pt:10174/2382Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T11:51:13.918115Repositórios 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 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
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/2382
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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
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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:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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