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Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): a review and future directions

2023-04-06Journal article Restricted access
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dc.contributor.authorCiviero, Chiara
dc.contributor.authorCarvalho, Joana
dc.contributor.authorSilveira, Graça
dc.date.accessioned2023-05-17T11:28:13Z
dc.date.available2023-05-17T11:28:13Z
dc.date.issued2023-04-06
dc.description.abstractOcean island volcanism provides a unique window into the nature of mantle composition, dynamics and evolution. The four Macaronesian archipelagos-Cape Verde, the Canaries, Madeira and the Azores-are the main magmatic systems of the Central-East Atlantic Ocean with volcanic activity that in some islands poses significant risk for the population. The recent development of regional seismic networks in these settings has provided an important step forward in mapping the underlying mantle. However, difficulties in resolving the small-scale structure with geophysical techniques persist leading to discrepancies in the interpretation of the mechanisms responsible for volcanism. Here we review results from a number of studies on the seismic mantle structure beneath the Macaronesian archipelagos including seismic tomography, receiver functions, precursors and shear-wave splitting. Several regional models show low-velocity features in the asthenosphere below the islands, a relatively thinned transition zone and complex anisotropic patterns and attribute the volcanism to mantle plumes. This inference is supported by whole-mantle tomography models, which find broad low-velocity anomalies in the lower mantle below the Central-East Atlantic. Other models call for alternative mechanisms associated with shallower mantle upwellings and purely plate tectonism. Thus, there is still no generally accepted mechanism that explains volcanism in the Macaronesia region. Future research requires improvements in the resolving power of seismic techniques to better illuminate the velocity structure at a much higher resolution than the currently achieved and ultimately define the mechanisms controlling the ocean island volcanism.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCIVIERO, Chiara; CARVALHO, Joana; SILVEIRA, Graça – Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions. Frontiers in Earth Science. eISSN 2296-6463. Vol. 11 (2023), pp. 1-9.pt_PT
dc.identifier.doi10.3389/feart.2023.1126274pt_PT
dc.identifier.eissn2296-6463
dc.identifier.urihttp://hdl.handle.net/10400.21/16053
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Media SApt_PT
dc.relationCEX2019-000928-Spt_PT
dc.relationInstituto Dom Luiz
dc.relationSeIsmic and Geochemical constraints on the Madeira HoTspot system
dc.relationIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
dc.relationGEMMA - improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data
dc.relation.publisherversionhttps://www.frontiersin.org/articles/10.3389/feart.2023.1126274/fullpt_PT
dc.subjectMacaronesia regionpt_PT
dc.subjectMantle structure and dynamicspt_PT
dc.subjectSeismic imagingpt_PT
dc.subjectOcean island volcanismpt_PT
dc.subjectCape Verde islandspt_PT
dc.subjectCanary and Madeira islandspt_PT
dc.subjectAzores islandspt_PT
dc.titleMantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): a review and future directionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInstituto Dom Luiz
oaire.awardTitleSeIsmic and Geochemical constraints on the Madeira HoTspot system
oaire.awardTitleIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
oaire.awardTitleGEMMA - improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50019%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEF%2F30264%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEF%2F6674%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEO%2F2083%2F2021/PT
oaire.citation.endPage9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleFrontiers in Earth Sciencept_PT
oaire.citation.volume11pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
person.familyNameCiviero
person.familyNameSantos de Carvalho
person.familyNameSilveira
person.givenNameChiara
person.givenNameJoana Filipa
person.givenNameGraça
person.identifier1036360
person.identifier91922
person.identifier.ciencia-id7F1D-761A-A8CB
person.identifier.ciencia-id2E17-6C99-4CBB
person.identifier.ciencia-id1116-1080-16F3
person.identifier.orcid0000-0002-6809-933X
person.identifier.orcid0000-0003-1077-8994
person.identifier.orcid0000-0002-2110-2554
person.identifier.ridK-3909-2015
person.identifier.ridA-3081-2009
person.identifier.scopus-author-id56841629500
person.identifier.scopus-author-id6602698071
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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