Publicação
Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data
| Resumo: | This work addresses the present-day (<100 ka) mantle heterogeneity in the Azores region through the study of two active volcanic systems from Terceira Island. Our study shows that mantle heterogeneities are detectable even when "coeval" volcanic systems (Santa Barbara and Fissural) erupted less than 10 km away. These volcanic systems, respectively, reflect the influence of the Terceira and D. Joao de Castro Bank end-members defined by Beier et at (2008) for the Terceira Rift Santa Barbara magmas are interpreted to be the result of mixing between a HIMU-type component, carried to the upper mantle by the Azores plume, and the regional depleted MORB magmas/source. Fissural lavas are characterized by higher Ba/Nb and Nb/U ratios and less radiogenic Pb-206/Pb-204, Nd-143/Nd-144 and Hf-176/Hf-177, requiring the small contribution of delaminated sub-continental lithospheric mantle residing in the upper mantle. Published noble gas data on lavas from both volcanic systems also indicate the presence of a relatively undegassed component, which is interpreted as inherited from a lower mantle reservoir sampled by the ascending Azores plume. As inferred from trace and major elements, melting began in the garnet stability field, while magma extraction occurred within the spinel zone. The intra-volcanic system's chemical heterogeneity is mainly explained by variable proportions of the above-mentioned local end-members and by crystal fractionation processes. |
|---|---|
| Autores principais: | Madureira, Pedro |
| Outros Autores: | Mata, João; Mattielli, Nadine; Queiroz, Gabriela; Silva, Pedro |
| Assunto: | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| Ano: | 2011 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Lisboa |
| _version_ | 1866887485555998720 |
|---|---|
| author | Madureira, Pedro |
| author2 | Mata, João Mattielli, Nadine Queiroz, Gabriela Silva, Pedro |
| author2_role | author author author author |
| author_facet | Madureira, Pedro Mata, João Mattielli, Nadine Queiroz, Gabriela Silva, Pedro |
| author_role | author |
| contributor_name_str_mv | RCIPL |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Madureira, Pedro\"},{\"Person.name\":\"Mata, João\",\"Person.identifier.orcid\":\"0000-0001-5769-7708\"},{\"Person.name\":\"Mattielli, Nadine\",\"Person.identifier.orcid\":\"0000-0002-7170-1520\"},{\"Person.name\":\"Queiroz, Gabriela\"},{\"Person.name\":\"Silva, Pedro\",\"Person.identifier.orcid\":\"0000-0002-9178-3623\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RCIPL |
| datacite.creators.creator.creatorName.fl_str_mv | Madureira, Pedro Mata, João Mattielli, Nadine Queiroz, Gabriela Silva, Pedro |
| datacite.date.Accepted.fl_str_mv | 2011-10-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2013-02-15T16:18:19Z |
| datacite.date.embargoed.fl_str_mv | 2013-02-15T16:18:19Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| datacite.titles.title.fl_str_mv | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| dc.contributor.none.fl_str_mv | RCIPL |
| dc.creator.none.fl_str_mv | Madureira, Pedro Mata, João Mattielli, Nadine Queiroz, Gabriela Silva, Pedro |
| dc.date.Accepted.fl_str_mv | 2011-10-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2013-02-15T16:18:19Z |
| dc.date.embargoed.fl_str_mv | 2013-02-15T16:18:19Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.21/2211 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| dc.title.fl_str_mv | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | This work addresses the present-day (<100 ka) mantle heterogeneity in the Azores region through the study of two active volcanic systems from Terceira Island. Our study shows that mantle heterogeneities are detectable even when "coeval" volcanic systems (Santa Barbara and Fissural) erupted less than 10 km away. These volcanic systems, respectively, reflect the influence of the Terceira and D. Joao de Castro Bank end-members defined by Beier et at (2008) for the Terceira Rift Santa Barbara magmas are interpreted to be the result of mixing between a HIMU-type component, carried to the upper mantle by the Azores plume, and the regional depleted MORB magmas/source. Fissural lavas are characterized by higher Ba/Nb and Nb/U ratios and less radiogenic Pb-206/Pb-204, Nd-143/Nd-144 and Hf-176/Hf-177, requiring the small contribution of delaminated sub-continental lithospheric mantle residing in the upper mantle. Published noble gas data on lavas from both volcanic systems also indicate the presence of a relatively undegassed component, which is interpreted as inherited from a lower mantle reservoir sampled by the ascending Azores plume. As inferred from trace and major elements, melting began in the garnet stability field, while magma extraction occurred within the spinel zone. The intra-volcanic system's chemical heterogeneity is mainly explained by variable proportions of the above-mentioned local end-members and by crystal fractionation processes. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ipl.pt/bitstreams/6f0029fd-227d-4658-8a04-35441f7475f9/download |
| id | ripl_ff4d673d7ffce7280b398b7397fa6aec |
| identifier.url.fl_str_mv | http://hdl.handle.net/10400.21/2211 |
| instacron_str | ipl |
| institution | Instituto Politécnico de Lisboa |
| instname_str | Instituto Politécnico de Lisboa |
| language | eng |
| network_acronym_str | ripl |
| network_name_str | Repositório Científico do Instituto Politécnico de Lisboa |
| oai_identifier_str | oai:repositorio.ipl.pt:10400.21/2211 |
| organization_str_mv | urn:organizationAcronym:ipl |
| person_str_mv | Madureira, Pedro Mata, João Mata, João https://www.ciencia-id.pt/4312-8A60-15E3 4312-8A60-15E3 http://orcid.org/0000-0001-5769-7708 0000-0001-5769-7708 Mattielli, Nadine Mattielli, Nadine http://orcid.org/0000-0002-7170-1520 0000-0002-7170-1520 Queiroz, Gabriela Silva, Pedro Silva, Pedro https://www.ciencia-id.pt/C314-1157-FD0C C314-1157-FD0C http://orcid.org/0000-0002-9178-3623 0000-0002-9178-3623 |
| publishDate | 2011 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | Repositório Científico do Instituto Politécnico de Lisboa |
| repository_id_str | urn:repositoryAcronym:ripl |
| service_str_mv | urn:repositoryAcronym:ripl |
| spelling | engElsevierporThis work addresses the present-day (<100 ka) mantle heterogeneity in the Azores region through the study of two active volcanic systems from Terceira Island. Our study shows that mantle heterogeneities are detectable even when "coeval" volcanic systems (Santa Barbara and Fissural) erupted less than 10 km away. These volcanic systems, respectively, reflect the influence of the Terceira and D. Joao de Castro Bank end-members defined by Beier et at (2008) for the Terceira Rift Santa Barbara magmas are interpreted to be the result of mixing between a HIMU-type component, carried to the upper mantle by the Azores plume, and the regional depleted MORB magmas/source. Fissural lavas are characterized by higher Ba/Nb and Nb/U ratios and less radiogenic Pb-206/Pb-204, Nd-143/Nd-144 and Hf-176/Hf-177, requiring the small contribution of delaminated sub-continental lithospheric mantle residing in the upper mantle. Published noble gas data on lavas from both volcanic systems also indicate the presence of a relatively undegassed component, which is interpreted as inherited from a lower mantle reservoir sampled by the ascending Azores plume. As inferred from trace and major elements, melting began in the garnet stability field, while magma extraction occurred within the spinel zone. The intra-volcanic system's chemical heterogeneity is mainly explained by variable proportions of the above-mentioned local end-members and by crystal fractionation processes.application/pdfporMantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) dataMadureira, PedroPersonalMata, JoãoDSpacehttp://dspace.org/items/7be0beb3-e47d-4ff0-befa-01dd05c93942DSpacehttp://dspace.org/items/7be0beb3-e47d-4ff0-befa-01dd05c93942MataJoãoCiência IDhttps://www.ciencia-id.pt4312-8A60-15E3ORCIDhttp://orcid.org0000-0001-5769-7708Researcher IDhttps://www.researcherid.comI-3352-2012Scopus Author IDhttps://www.scopus.com7102806167PersonalMattielli, NadineDSpacehttp://dspace.org/items/c370049a-3a1a-45c2-842a-82df39aea180DSpacehttp://dspace.org/items/c370049a-3a1a-45c2-842a-82df39aea180MattielliNadineORCIDhttp://orcid.org0000-0002-7170-1520Queiroz, GabrielaPersonalSilva, PedroDSpacehttp://dspace.org/items/54c96e27-8c3a-42d9-b751-ebc637c2f478DSpacehttp://dspace.org/items/54c96e27-8c3a-42d9-b751-ebc637c2f478SilvaPedroCiência IDhttps://www.ciencia-id.ptC314-1157-FD0CORCIDhttp://orcid.org0000-0002-9178-3623Researcher IDhttps://www.researcherid.comB-8512-2008Scopus Author IDhttps://www.scopus.com55431034700HostingInstitutionOrganizationalRCIPLe-mailmailto:rcaap@sp.ipl.ptrcaap@sp.ipl.ptISSNIsPartOf0024-4937DOIIsPartOf10.1016/j.lithos.2011.07.0022013-02-15T16:18:19Z2011-102011-10-01T00:00:00ZHandlehttp://hdl.handle.net/10400.21/2211http://purl.org/coar/access_right/c_abf2open accessOcean island basaltsSmall-scale mantle heterogeneityTerceira IslandAzores2642378 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ipl.pt/bitstreams/6f0029fd-227d-4658-8a04-35441f7475f9/downloadLithos1263-4402418Amsterdam |
| spellingShingle | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data Madureira, Pedro Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| status | SINGLETON |
| subject.fl_str_mv | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| title | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| title_full | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| title_fullStr | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| title_full_unstemmed | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| title_short | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| title_sort | Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data |
| topic | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| topic_facet | Ocean island basalts Small-scale mantle heterogeneity Terceira Island Azores |
| url | http://hdl.handle.net/10400.21/2211 |
| visible | 1 |