Logo do repositório
 
Publicação

Investigating collapse structures in oceanic islands using magnetotelluric surveys: The case of Fogo Island in Cape Verde

2018-05-15Artigo científico Acesso aberto
Ver registo simples
dc.contributor.authorMartínez-Moreno, F.J.
dc.contributor.authorMonteiro Santos, Fernando Acácio
dc.contributor.authorMadeira, José
dc.contributor.authorPous, J.
dc.contributor.authorBernardo, I.
dc.contributor.authorSoares, A.
dc.contributor.authorEsteves, M.
dc.contributor.authorAdão, F.
dc.contributor.authorRibeiro, J.
dc.contributor.authorMata, João
dc.contributor.authorBrum da Silveira, A.
dc.date.accessioned2022-03-30T13:57:03Z
dc.date.available2022-03-30T13:57:03Z
dc.date.issued2018-05-15
dc.description.abstractOne of the most remarkable natural events on Earth are the large lateral flank collapses of oceanic volcanoes, involving volumes of rock exceeding tens of km3. These collapses are relatively frequent in recent geological times as supported by evidence found in the geomorphology of volcanic island edifices and associated debris flows deposited on the proximal ocean floor. The Island of Fogo in the Cape Verde archipelago is one of the most active and prominent oceanic volcanoes on Earth. The island has an average diameter of 25 km and reaches a maximum elevation of 2829 m above sea level (m a.s.l.) at Pico do Fogo, a young stratovolcano located within a summit depression open eastward due to a large lateral flank collapse. The sudden collapse of the eastern flank of Fogo Island produced a megatsunami ~73 ky ago. The limits of the flank collapse were deduced as well from geomorphologic markers within the island. The headwall of the collapse scar is interpreted as either being located beneath the post-collapse volcanic infill of the summit depression or located further west, corresponding to the Bordeira wall that partially surrounds it. The magnetotelluric (MT) method provides a depth distribution of the ground resistivity obtained by the simultaneous measurement of the natural variations of the electric and magnetic field of the Earth. Two N-S magnetotelluric profiles were acquired across the collapsed area to determine its geometry and boundaries. The acquired MT data allowed the determination of the limits of the collapsed area more accurately as well as its morphology at depth and thickness of the post-collapse infill. According to the newly obtained MT data and the bathymetry of the eastern submarine flank of Fogo, the volume involved in the flank collapse is estimated in ~110 km3. This volume –the first calculated onshore– stands between the previously published more conservative and excessive calculations –offshore– that were exclusively based in geomorphic evidence. The model for the summit depression proposing two caldera collapses preceding the collapse of the eastern flank of Fogo is supported by the MT data.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jvolgeores.2018.04.028pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/52096
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPlume-lithosphere interaction in the Cape Verde Archipelago: PLINT
dc.relationINTERGEOFOGOS - Geospheric interaction in oceanic islands: the volcanoes of Fogo Azores and Fogo Cape Verde
dc.relationFogo Island volcano: multi disciplinary Research on 2014 Eruption
dc.relationInstitute Dom Luiz
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0377027317305668?via%3Dihub#!pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectVolcanic ocean islandspt_PT
dc.subjectMagnetotelluricpt_PT
dc.titleInvestigating collapse structures in oceanic islands using magnetotelluric surveys: The case of Fogo Island in Cape Verdept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberPOCTI/CTA/45802/2002
oaire.awardNumberPOCTI/CTA/35614/2000
oaire.awardNumberPTDC/GEO-GEO/1123/2014
oaire.awardNumberUID/GEO/50019/2013
oaire.awardTitlePlume-lithosphere interaction in the Cape Verde Archipelago: PLINT
oaire.awardTitleINTERGEOFOGOS - Geospheric interaction in oceanic islands: the volcanoes of Fogo Azores and Fogo Cape Verde
oaire.awardTitleFogo Island volcano: multi disciplinary Research on 2014 Eruption
oaire.awardTitleInstitute Dom Luiz
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FCTA%2F45802%2F2002/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FCTA%2F35614%2F2000/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FGEO-GEO%2F1123%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FGEO%2F50019%2F2013/PT
oaire.citation.endPage162pt_PT
oaire.citation.startPage152pt_PT
oaire.citation.titleJournal of Volcanology and Geothermal Researchpt_PT
oaire.citation.volume357pt_PT
oaire.fundingStreamPOCI
oaire.fundingStreamPOCI
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMartínez Moreno
person.familyNamemonteiro santos
person.familyNamede Oliveira Madeira
person.familyNameMata
person.givenNameFrancisco José
person.givenNamefernando acácio
person.givenNameJosé Eduardo
person.givenNameJoão
person.identifier2HoVqKAAAAAJ
person.identifierI-3352-2012
person.identifier.ciencia-id9213-5508-F08B
person.identifier.ciencia-idC812-509E-03D3
person.identifier.ciencia-id191B-3EB0-B665
person.identifier.ciencia-id4312-8A60-15E3
person.identifier.orcid0000-0001-9005-7905
person.identifier.orcid0000-0001-8797-4008
person.identifier.orcid0000-0003-4729-8994
person.identifier.orcid0000-0001-5769-7708
person.identifier.scopus-author-id55776104800
person.identifier.scopus-author-id7102806167
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf747e44e-5b71-499a-b62e-d3c207128444
relation.isAuthorOfPublication1aede50c-75f0-4dc3-8cb6-2b2e5bcb5bb3
relation.isAuthorOfPublication052a1f1d-83d2-4c82-ba58-c4a82537620c
relation.isAuthorOfPublication278485d1-0ce7-40c8-b5e2-a0e3465f29bf
relation.isAuthorOfPublication.latestForDiscovery278485d1-0ce7-40c8-b5e2-a0e3465f29bf
relation.isProjectOfPublicatione74f396d-d60d-470e-9cff-fb684ba0cf3b
relation.isProjectOfPublication0f259cee-2e60-47ce-8c7e-a19257d50e4b
relation.isProjectOfPublication2e6494a5-f44b-45c2-8e47-81a848b89d35
relation.isProjectOfPublicationd1f031b5-9050-4e18-9986-fe5c69568e41
relation.isProjectOfPublication.latestForDiscoverye74f396d-d60d-470e-9cff-fb684ba0cf3b

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
Investigating_Fogo.pdf
Tamanho:
5.53 MB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

IDL - Artigos em Revistas Internacionais