Repository logo
 
Publication

Crustal and uppermost mantle structure of Cape Verde from ambient noise tomography

2022-07-01Journal article Open access
Simple item page
dc.contributor.authorCarvalho, J.
dc.contributor.authorSilveira, Graça
dc.contributor.authorKiselev, S
dc.contributor.authorCustódio, Susana
dc.contributor.authorDos Santos Ramalho, Ricardo
dc.contributor.authorStutzmann, E
dc.contributor.authorSchimmel, M
dc.date.accessioned2023-03-22T14:19:29Z
dc.date.available2023-03-22T14:19:29Z
dc.date.issued2022-07-01
dc.descriptionThis is a pre-copyedited, author-produced PDF of an article accepted for publication in Geophysical Journal International following peer review. The version of record J Carvalho, G Silveira, S Kiselev, S Custódio, R S Ramalho, E Stutzmann, M Schimmel, Crustal and uppermost mantle structure of Cape Verde from ambient noise tomography, Geophysical Journal International, Volume 231, Issue 2, November 2022, Pages 1421–1433, https://doi.org/10.1093/gji/ggac254, is available online at: https://academic.oup.com/gji/article-abstract/231/2/1421/6624981?redirectedFrom=fulltext&login=truept_PT
dc.description.abstractWe present a seismic ambient noise tomography of the Cape Verde archipelago, located in the Atlantic Ocean, approximately 600 km west of Senegal. We used 38 seismic broad-band stations that continuously recorded for 10 months, in order to construct the first 3-D model of Sv-wave velocities for the crust and uppermost mantle beneath the Cape Verde region. We started by computing phase cross-correlations for vertical component recordings using all possible inter-island station pairs. Next, a time–frequency phase-weighted stack was applied to obtain robust Rayleigh-wave group-velocity dispersion curves in the period band between 10 and 24 s. Group-velocity maps at different periods are obtained by inverting the dispersion curves. We then inverted the group-velocity maps to obtain the 3-D shear wave velocity structure of the crust and uppermost mantle beneath Cape Verde. The final 3-D model extends from 8 km down to 23 km and has a lateral resolution of about 50 km. The crust in the southwestern sector, encompassing Fogo, presents lower S-wave velocities that may be caused by the presence of melt pockets and/or hydrothermal fluids circulation. The uppermost mantle beneath the northwestern sector is characterized by higher S-wave velocities in agreement with previous results obtained from Ps and Sp receiver functions. Those high-velocity anomalies can reflect non-altered crust or remnants of magma chambers or solidified basaltic intrusions, which fed the volcanism in these islands. Our maps revealed the presence of crustal underplating across the entire archipelago, yet stronger beneath the groups Santo Antão—São Vicente—São Nicolau and Fogo—Santiago—Maio.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.citationJ Carvalho, G Silveira, S Kiselev, S Custódio, R S Ramalho, E Stutzmann, M Schimmel, Crustal and uppermost mantle structure of Cape Verde from ambient noise tomography, Geophysical Journal International, Volume 231, Issue 2, November 2022, Pages 1421–1433, https://doi.org/10.1093/gji/ggac254pt_PT
dc.identifier.doi10.1093/gji/ggac254pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/56757
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherOxford University Presspt_PT
dc.relationPTDC/CTA-GEF/30264/2017pt_PT
dc.relationPTDC/GEO- GEO/1123/2014pt_PT
dc.relationPTDC/CTA- GEF/6674/2020pt_PT
dc.relationUIDB/50019/2020pt_PT
dc.relation.publisherversionhttps://academic.oup.com/gji/article-abstract/231/2/1421/6624981?redirectedFrom=fulltext&login=truept_PT
dc.subjectSeismic noisept_PT
dc.subjectSeismic tomographypt_PT
dc.subjectOceanic hotspotspt_PT
dc.subjectCrustal structurept_PT
dc.subjectSurface wavespt_PT
dc.subjectIntraplate volcanismpt_PT
dc.titleCrustal and uppermost mantle structure of Cape Verde from ambient noise tomographypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1433pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage1421pt_PT
oaire.citation.titleGeophysical Journal Internationalpt_PT
oaire.citation.volume231pt_PT
person.familyNameSantos de Carvalho
person.familyNameMedeiros da Silveira
person.familyNameCustódio
person.familyNameRamalho
person.givenNameJoana Filipa
person.givenNameMaria da Graça
person.givenNameSusana
person.givenNameRicardo
person.identifierY-4951-2018
person.identifierA-3081-2009
person.identifierK-7598-2012
person.identifier393989
person.identifier.ciencia-id2E17-6C99-4CBB
person.identifier.ciencia-id1116-1080-16F3
person.identifier.ciencia-id2113-1BF3-9A06
person.identifier.ciencia-id0217-6E26-E36B
person.identifier.orcid0000-0003-1077-8994
person.identifier.orcid0000-0002-2110-2554
person.identifier.orcid0000-0001-7457-4179
person.identifier.orcid0000-0002-2338-5535
person.identifier.ridI-6031-2012
person.identifier.scopus-author-id6602698071
person.identifier.scopus-author-id15749783000
person.identifier.scopus-author-id36011115200
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0e691650-a183-46f5-ba74-784e30b8b9db
relation.isAuthorOfPublicationa6ba2183-dfac-4f3e-9607-93cd0a8f926e
relation.isAuthorOfPublicationdba20f14-b09b-41ec-bb39-4ffad37524d4
relation.isAuthorOfPublicationa6e7326c-29b4-48b1-990c-161700d67ba6
relation.isAuthorOfPublication.latestForDiscoverydba20f14-b09b-41ec-bb39-4ffad37524d4

Files

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

Collections

IDL - Artigos em Revistas Internacionais