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The Tagus River delta landslide, off Lisbon, Portugal. Implications for Marine geo-hazards

2019-10Journal article Restricted access
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dc.contributor.authorTerrinha, Pedro
dc.contributor.authorDuarte, Henrique
dc.contributor.authorBrito, Pedro
dc.contributor.authorNoiva, João
dc.contributor.authorRibeiro, Carlos
dc.contributor.authorOmira, Rachid
dc.contributor.authorBaptista, Maria Ana Carvalho Viana
dc.contributor.authorMiranda, Miguel
dc.contributor.authorMagalhaes, Vitor
dc.contributor.authorRoque, C.
dc.contributor.authorRosa, Marcos
dc.contributor.authorAlves, Paulo
dc.contributor.authorTeixeira, Francisco
dc.contributor.authorTagusdelta Cruise Team
dc.date.accessioned2019-10-04T08:12:33Z
dc.date.available2019-10-04T08:12:33Z
dc.date.issued2019-10
dc.description.abstractThe stratigraphy of the Tagus river ebb-tidal delta off Lisbon (Portugal) is investigated using high resolution multichannel seismic reflection profiles with the purpose of searching for sedimentary or erosive features associated with landslides. The Tagus delta is sub-divided in two prograding seismic units of 17 ky to 13 ky and 13 ky to Present based on the calibration of seismic lines using gravity and box-cores in the Tagus pro-delta. We report the existence of a buried landslide with 11 km of length, 3.5 km of width and a maximum thickness of 20 m that accounted for the collapse of half of the upper unit of the Tagus river delta front in Holocene times. The non-collapsed half of the delta front contains extensive shallow gas of still unknown origin and nature. An estimated age of similar to 8 ky BP for the Tagus delta landslide is proposed based on stratigraphic correlation. The trigger mechanisms of the newly identified Tagus landslide are discussed as well as of the several landslides also found in the lower delta unit. These findings present a first step towards a future assessment of the susceptibility of the nearby coastal areas and the off-shore infrastructures to hazards related to such large collapses.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTERRINHA, Pedro; [et al] – The Tagus River delta landslide, off Lisbon, Portugal. Implications for Marine geo-hazards. Marine Geology. ISSN 0025-3227. Vol. 416 (2019), pp. 1-16pt_PT
dc.identifier.doi10.1016/j.margeo.2019.105983pt_PT
dc.identifier.issn0025-3227
dc.identifier.issn1872-6151
dc.identifier.urihttp://hdl.handle.net/10400.21/10542
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPTDC/CTA-GEO/031885/2017 - FCTpt_PT
dc.relationTAGUSDELTA - 3D high-resolution seismic stratigraphy of the Tagus Delta - imaging and modeling of tsunami evidence for geological hazards assessment
dc.relationPast Continental Climate Change: Temperatures from marine and lacustrine archives
dc.relationAssessment, STrategy And Risk Reduction for Tsunamis in Europe
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dc.subjectTagus River - NE Atlanticpt_PT
dc.subjectEbb-tidal deltapt_PT
dc.subjectSeismic stratigraphypt_PT
dc.subjectSubmarine landslidept_PT
dc.subjectTsunami hazardpt_PT
dc.titleThe Tagus River delta landslide, off Lisbon, Portugal. Implications for Marine geo-hazardspt_PT
dc.typejournal article
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oaire.awardTitleTAGUSDELTA - 3D high-resolution seismic stratigraphy of the Tagus Delta - imaging and modeling of tsunami evidence for geological hazards assessment
oaire.awardTitlePast Continental Climate Change: Temperatures from marine and lacustrine archives
oaire.awardTitleAssessment, STrategy And Risk Reduction for Tsunamis in Europe
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F113888%2F2009/PT
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oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/603839/EU
oaire.citation.endPage16pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMarine Geologypt_PT
oaire.citation.volume416pt_PT
oaire.fundingStream3599-PPCDT
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person.familyNameTerrinha
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person.familyNamede Carvalho Viana Baptista
person.familyNameda Silva Magalhães
person.familyNameRoque
person.givenNamePedro
person.givenNameJoão
person.givenNameRachid
person.givenNameMARIA ANA
person.givenNameVitor Hugo
person.givenNameCristina
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project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameEuropean Commission
project.funder.nameEuropean Commission
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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