Repository logo
 
Publication

A common deep source for upper-mantle upwellings below the Ibero-western Maghreb region from teleseismic P-wave travel-time tomography

2018-10-01Journal article Restricted access
Simple item page
dc.contributor.authorCiviero, Chiara
dc.contributor.authorStrak, Vincent
dc.contributor.authorCustodio, Susana
dc.contributor.authorSilveira, Graça
dc.contributor.authorRawlinson, Nicholas
dc.contributor.authorArroucau, Pierre
dc.contributor.authorCorela, Carlos
dc.date.accessioned2018-11-27T15:11:51Z
dc.date.available2018-11-27T15:11:51Z
dc.date.issued2018-10-01
dc.description.abstractUpper-mantle upwellings are often invoked as the cause of Cenozoic volcanism in the Ibero-western Maghreb region. However, their nature, geometry and origin are unclear. This study takes advantage of dense seismic networks, which cover an area extending from the Pyrenees in the north to the Canaries in the south, to provide a new high-resolution P-wave velocity model of the upper-mantle and topmost lower-mantle structure. Our images show three subvertical upper-mantle upwellings below the Canaries, the Atlas Ranges and the Gibraltar Arc, which appear to be rooted beneath the upper-mantle transition zone (MTZ). Two other mantle upwellings beneath the eastern Rif and eastern Betics surround the Gibraltar subduction zone. We propose a new geodynamic model in which narrow upper-mantle upwellings below the Canaries, the Atlas Ranges and the Gibraltar Arc rise from a laterally-propagating layer of material below the MTZ, which in turn is fed by a common deep source below the Canaries. In the Gibraltar region, the deeply rooted upwelling interacts with the Gibraltar slab. Quasi-toroidal flow driven by slab rollback induces the hot mantle material to flow around the slab, creating the two low-velocity anomalies below the eastern Betics and eastern Rif. Our results suggest that the Central Atlantic plume is a likely source of hot mantle material for upper-mantle upwellings in the Ibero-western Maghreb region.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCIVIERO, Chiara; [et al] – A common deep source for upper-mantle upwellings below the Ibero-western Maghreb region from teleseismic P-wave travel-time tomography. Earth and Planetary Science Letters. ISSN 0012-821X. Vol. 499 (2018), pp. 157-172pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.epsl.2018.07.024pt_PT
dc.identifier.issn0012-821X
dc.identifier.issn1385-013X
dc.identifier.urihttp://hdl.handle.net/10400.21/9094
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationSeismogenic Processes In slowly DEforming Regions
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0012821X18304308?token=73781C662A0D0D5177F44F84835F36641997CB60DB16A4A76C8D57BB310903545F35681CA20380E5F06F51E519622DAFpt_PT
dc.subjectWave tomographypt_PT
dc.subjectMaghreb regionpt_PT
dc.subjectMantle flowpt_PT
dc.subjectCanary mantle plumept_PT
dc.subjectTomografia de ondaspt_PT
dc.subjectRegião do Magrebept_PT
dc.subjectFluxo do manto
dc.subjectPluma mantélica
dc.titleA common deep source for upper-mantle upwellings below the Ibero-western Maghreb region from teleseismic P-wave travel-time tomographypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSeismogenic Processes In slowly DEforming Regions
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FGEO-FIQ%2F2590%2F2014/PT
oaire.citation.endPage172pt_PT
oaire.citation.startPage157pt_PT
oaire.citation.titleEarth and Planetary Science Letterspt_PT
oaire.citation.volume499pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameCiviero
person.familyNameStrak
person.familyNameCustódio
person.familyNameSilveira
person.familyNameRawlinson
person.familyNameArroucau
person.familyNameCorela
person.givenNameChiara
person.givenNameVincent
person.givenNameSusana
person.givenNameGraça
person.givenNameNicholas
person.givenNamePierre
person.givenNameCarlos
person.identifier1036360
person.identifierK-7598-2012
person.identifier91922
person.identifier.ciencia-id7F1D-761A-A8CB
person.identifier.ciencia-id2113-1BF3-9A06
person.identifier.ciencia-id1116-1080-16F3
person.identifier.ciencia-id811C-1564-A9C2
person.identifier.orcid0000-0002-6809-933X
person.identifier.orcid0000-0002-8664-8419
person.identifier.orcid0000-0001-7457-4179
person.identifier.orcid0000-0002-2110-2554
person.identifier.orcid0000-0002-6977-291X
person.identifier.orcid0000-0003-4142-227X
person.identifier.orcid0000-0002-0150-2286
person.identifier.ridK-3909-2015
person.identifier.ridG-3689-2017
person.identifier.ridA-3081-2009
person.identifier.ridM-1567-2014
person.identifier.scopus-author-id56841629500
person.identifier.scopus-author-id36554918800
person.identifier.scopus-author-id15749783000
person.identifier.scopus-author-id6602698071
person.identifier.scopus-author-id6701458148
person.identifier.scopus-author-id14018877600
person.identifier.scopus-author-id37045305000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa704b0ab-3681-42fb-92ca-b417d78debdd
relation.isAuthorOfPublication8a9278fa-1b53-43fd-be94-433b40833ec9
relation.isAuthorOfPublicationd7e87965-9dd3-4841-a276-58c68898e79d
relation.isAuthorOfPublicationd4ff725a-b30b-4acb-906d-b60530a4994f
relation.isAuthorOfPublication6eeb7f81-6ac4-4931-96e0-5d23121ccdd9
relation.isAuthorOfPublication9864891a-08ed-4dd1-b041-86dabd800bdd
relation.isAuthorOfPublication47729099-51c8-41b9-b309-0f401a93215f
relation.isAuthorOfPublication.latestForDiscoverya704b0ab-3681-42fb-92ca-b417d78debdd
relation.isProjectOfPublication90fbce63-d20e-473f-8c2c-4db368f568f5
relation.isProjectOfPublication.latestForDiscovery90fbce63-d20e-473f-8c2c-4db368f568f5

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
A common_GSilveira_ADF.pdf
Size:
5.04 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Física - Artigos