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Mantle dynamics and characteristics of the Azores plateau

2013-01Journal article Open access
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dc.contributor.authorAdam, C.
dc.contributor.authorMadureira, P.
dc.contributor.authorMiranda, M
dc.contributor.authorLourenço, Nuno
dc.contributor.authorYoshida, M.
dc.contributor.authorFitzenz, D.
dc.date.accessioned2018-12-07T14:53:09Z
dc.date.available2018-12-07T14:53:09Z
dc.date.issued2013-01
dc.description.abstractSituated in the middle of the Atlantic Ocean, the Azores plateau is a region of elevated topography encompassing the triple junction between the Eurasian, Nubian and North American plates. The plateau is crossed by the Mid-Atlantic Ridge, and the Terceira Rift is generally thought of as its northern boundary. The origin of the plateau and of the Terceira Rift is still under debate. This region is associated with active volcanism. Geophysical data describe complex tectonic and seismic patterns. The mantle under this region is characterized by anomalously slow seismic velocities. However, this mantle structure has not yet been used to quantitatively assess the influence of the mantle dynamics on the surface tectonics. In this study, we use a highly resolved tomography model to model the convection occurring in the mantle beneath the Azores region. The convection pattern points out two distinct upwelling, thus proving that the volcanism emplacement is created by a buoyant mantle upwelling. The modeled dynamic topography recovers well the characteristics of the depth anomaly associated with the Azores plateau, except for the south-eastern most part, thus proving that most of the depth anomaly associated with the Azores plateau is created by the present-day mantle dynamics. The stresses induced by the mantle convection can account for the lifting regime observed over the Azores plateau and the Terceira Rift, and its consequences in terms of surface morphology and seismicity. (C) 2012 Elsevier B.V. All rights reserved.
dc.description.sponsorshipFundacaopara a Ciencia e a Tecnologia (OREAZ) [PTDC/CTE-GIX/102061/2008]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.epsl.2012.11.014
dc.identifier.issn0012-821X
dc.identifier.urihttp://hdl.handle.net/10400.1/11373
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMid-Atlantic ridge
dc.subjectSao-Miguel
dc.subjectTriple junction
dc.subjectHotspot
dc.subjectIsland
dc.subjectSouth
dc.subjectArchipelago
dc.subjectTomography
dc.subjectFrequency
dc.subjectEruption
dc.titleMantle dynamics and characteristics of the Azores plateau
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FCTE-GIX%2F102061%2F2008/PT
oaire.citation.endPage271
oaire.citation.startPage258
oaire.citation.titleEarth and Planetary Science Letters
oaire.citation.volume362
oaire.fundingStream5876-PPCDTI
person.familyNameMIRANDA
person.familyNameLourenço
person.givenNameJORGE MIGUEL
person.givenNameNuno
person.identifier1644327
person.identifier.ciencia-idED1A-8CC7-06DB
person.identifier.ciencia-id4A13-CD1F-7BEE
person.identifier.orcid0000-0002-1321-8709
person.identifier.orcid0000-0002-8038-677X
person.identifier.ridB-5287-2008
person.identifier.ridA-5361-2013
person.identifier.scopus-author-id7202982159
person.identifier.scopus-author-id57216555279
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication15ae5352-04d3-4719-a105-f9599fdcbd1d
relation.isAuthorOfPublication0e5f36bb-a904-41d3-8bd9-8acd132dc808
relation.isAuthorOfPublication.latestForDiscovery15ae5352-04d3-4719-a105-f9599fdcbd1d
relation.isProjectOfPublication00700b08-10b1-4253-a393-e83361d78828
relation.isProjectOfPublication.latestForDiscovery00700b08-10b1-4253-a393-e83361d78828

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