Fe-Mn crusts from the Central Atlantic

Detalhes bibliográficos
Autor(a) principal: Conceição, Patrícia
Data de Publicação: 2014
Outros Autores: Mirão, José, Madureira, Pedro, Costa, Raquel
Tipo de documento: Artigo de conferência
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/13474
Resumo: The exploration of seamounts south of the Azores during the EMEPC/Açores/G3/2007 campaign allowed for the collection of 30 Fe-Mn crusts from the Atlantis, Great Meteor, Small Hyeres, Irving and Plato seamounts, as well as from the East Azores Fracture Zone. These were the first samples of Fe-Mn crusts studied from these seamounts. The Fe-Mn crusts were analyzed using multiple analytical methods. The crusts are fairly homogeneous, showing typical textures for this type of occurrences. The Fe/Mn ratio, patterns and concentrations in rare earth elements, and the great homogeneity of the crusts lead to the conclusion that they have a hydrogenetic origin, precipitating directly from seawater. Although the content in Fe and Mn of the crusts is consistent with data available for the Atlantic, the mean concentration of Co is comparable to the average values for the Pacific. Cu and Ni show lower values than the ones known for the Pacific.
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spelling Fe-Mn crusts from the Central AtlanticFe-Mn crustsAtlanticThe exploration of seamounts south of the Azores during the EMEPC/Açores/G3/2007 campaign allowed for the collection of 30 Fe-Mn crusts from the Atlantis, Great Meteor, Small Hyeres, Irving and Plato seamounts, as well as from the East Azores Fracture Zone. These were the first samples of Fe-Mn crusts studied from these seamounts. The Fe-Mn crusts were analyzed using multiple analytical methods. The crusts are fairly homogeneous, showing typical textures for this type of occurrences. The Fe/Mn ratio, patterns and concentrations in rare earth elements, and the great homogeneity of the crusts lead to the conclusion that they have a hydrogenetic origin, precipitating directly from seawater. Although the content in Fe and Mn of the crusts is consistent with data available for the Atlantic, the mean concentration of Co is comparable to the average values for the Pacific. Cu and Ni show lower values than the ones known for the Pacific.2015-03-23T10:06:53Z2015-03-232014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/13474http://hdl.handle.net/10174/13474pornaonaosimpatricia.conceicao@emepc.mam.gov.ptjmirao@uevora.ptpedro@uevora.ptraquel.costa@emepc.mam.gov.pt247Conceição, PatríciaMirão, JoséMadureira, PedroCosta, Raquelinfo: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:RCAAP2024-01-03T18:59:00Zoai:dspace.uevora.pt:10174/13474Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:06:56.045104Repositório 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 Fe-Mn crusts from the Central Atlantic
title Fe-Mn crusts from the Central Atlantic
spellingShingle Fe-Mn crusts from the Central Atlantic
Conceição, Patrícia
Fe-Mn crusts
Atlantic
title_short Fe-Mn crusts from the Central Atlantic
title_full Fe-Mn crusts from the Central Atlantic
title_fullStr Fe-Mn crusts from the Central Atlantic
title_full_unstemmed Fe-Mn crusts from the Central Atlantic
title_sort Fe-Mn crusts from the Central Atlantic
author Conceição, Patrícia
author_facet Conceição, Patrícia
Mirão, José
Madureira, Pedro
Costa, Raquel
author_role author
author2 Mirão, José
Madureira, Pedro
Costa, Raquel
author2_role author
author
author
dc.contributor.author.fl_str_mv Conceição, Patrícia
Mirão, José
Madureira, Pedro
Costa, Raquel
dc.subject.por.fl_str_mv Fe-Mn crusts
Atlantic
topic Fe-Mn crusts
Atlantic
description The exploration of seamounts south of the Azores during the EMEPC/Açores/G3/2007 campaign allowed for the collection of 30 Fe-Mn crusts from the Atlantis, Great Meteor, Small Hyeres, Irving and Plato seamounts, as well as from the East Azores Fracture Zone. These were the first samples of Fe-Mn crusts studied from these seamounts. The Fe-Mn crusts were analyzed using multiple analytical methods. The crusts are fairly homogeneous, showing typical textures for this type of occurrences. The Fe/Mn ratio, patterns and concentrations in rare earth elements, and the great homogeneity of the crusts lead to the conclusion that they have a hydrogenetic origin, precipitating directly from seawater. Although the content in Fe and Mn of the crusts is consistent with data available for the Atlantic, the mean concentration of Co is comparable to the average values for the Pacific. Cu and Ni show lower values than the ones known for the Pacific.
publishDate 2014
dc.date.none.fl_str_mv 2014-01-01T00:00:00Z
2015-03-23T10:06:53Z
2015-03-23
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patricia.conceicao@emepc.mam.gov.pt
jmirao@uevora.pt
pedro@uevora.pt
raquel.costa@emepc.mam.gov.pt
247
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