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The role of the seismically slow Central-East Atlantic anomaly in the genesis of the Canary and Madeira volcanic provinces

2021-07-16Journal article Restricted access
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dc.contributor.authorCiviero, Chiara
dc.contributor.authorCustodio, Susana
dc.contributor.authorNeres, Marta
dc.contributor.authorSchlaphorst, David
dc.contributor.authorMata, João
dc.contributor.authorSilveira, Graça
dc.date.accessioned2021-10-07T08:40:43Z
dc.date.available2021-10-07T08:40:43Z
dc.date.issued2021-07-16
dc.description.abstractThe Canary and Madeira provinces in the Central-East Atlantic Ocean are characterized by an irregular spatio-temporal distribution of volcanism along the hotspot tracks, and several alternative scenarios have been suggested to explain it. Here, we combine results from seismic tomography, shear-wave splitting and gravity along with plate reconstruction constraints to investigate the mantle structure and dynamics beneath those provinces. We find that the Central-East Atlantic Anomaly (CEAA), which rises from the core-mantle boundary and stalls in the topmost lower mantle, is the deep source of distinct upper-mantle upwellings beneath the region. The upwellings detach intermittently from the top of the CEAA and appear to be at different evolutionary stages. We argue that the accumulation of plume material in the topmost lower mantle can play a key role in governing the first-order spatio-temporal irregularities in the distribution of hotspot volcanism.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCIVIERO, Chiara; [et al] – The role of the seismically slow Central-East Atlantic anomaly in the genesis of the Canary and Madeira volcanic provinces. Geophysical Research Letters. ISSN 0094-8276. Vol. 48, N.º 13 (2021), pp. 1-15pt_PT
dc.identifier.doi10.1029/2021GL092874pt_PT
dc.identifier.eissn1944-8007
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/10400.21/13831
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAMER GEOPHYSICAL UNIONpt_PT
dc.relation13/CDA/2192 - Marine Institutept_PT
dc.relationSeIsmic and Geochemical constraints on the Madeira HoTspot system
dc.relationSeismogenic Processes In slowly DEforming Regions
dc.relationIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
dc.relationLithospheric structure of the Southwest Iberia margin - LISA
dc.relationInstituto Dom Luiz
dc.relation.publisherversionhttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2021GL092874pt_PT
dc.subjectHotspot trackspt_PT
dc.subjectCentral-East Atlantic Oceanpt_PT
dc.subjectMantle upwellingspt_PT
dc.subjectAfrican LLSVPpt_PT
dc.subjectIntraplate volcanismpt_PT
dc.subjectCentral-East Atlantic Anomalypt_PT
dc.titleThe role of the seismically slow Central-East Atlantic anomaly in the genesis of the Canary and Madeira volcanic provincespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSeIsmic and Geochemical constraints on the Madeira HoTspot system
oaire.awardTitleSeismogenic Processes In slowly DEforming Regions
oaire.awardTitleIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
oaire.awardTitleLithospheric structure of the Southwest Iberia margin - LISA
oaire.awardTitleInstituto Dom Luiz
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oaire.citation.endPage15pt_PT
oaire.citation.issue13pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleGeophysical Research Letterspt_PT
oaire.citation.volume48pt_PT
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oaire.fundingStream6817 - DCRRNI ID
person.familyNameCiviero
person.familyNameCustódio
person.familyNameMaria de Almeida Neres
person.familyNameSchlaphorst
person.familyNameMata
person.familyNameSilveira
person.givenNameChiara
person.givenNameSusana
person.givenNameMarta
person.givenNameDavid
person.givenNameJoão
person.givenNameGraça
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