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Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data

2018-12Journal article Restricted access
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dc.contributor.authorPinheiro, J. M.
dc.contributor.authorSchnurle, P.
dc.contributor.authorEvain, Mikael
dc.contributor.authorAfilhado, Alexandra
dc.contributor.authorGallais, F.
dc.contributor.authorKlingelhoefer, Frauke
dc.contributor.authorLoureiro, Afonso
dc.contributor.authorFuck, R.
dc.contributor.authorSoares, J.
dc.contributor.authorCupertino, J. A.
dc.contributor.authorViana, Adriano Roessler
dc.contributor.authorRabineau, Marina
dc.contributor.authorBaltzer, A.
dc.contributor.authorBenabdellouahed, M.
dc.contributor.authorDias, Nuno
dc.contributor.authorMoulin, Maryline
dc.contributor.authorAslani, D.
dc.contributor.authorMorvan, L.
dc.contributor.authorMaze, J. P.
dc.contributor.authorPierre, D.
dc.contributor.authorRoudaut-Pitel, M.
dc.contributor.authorRio, I.
dc.contributor.authorAlves, D.
dc.contributor.authorBarros, P.
dc.contributor.authorBiari, Youssef
dc.contributor.authorCorela, Carlos
dc.contributor.authorCrozon, J.
dc.contributor.authorDuarte, J. L.
dc.contributor.authorDucatel, C.
dc.contributor.authorFalcão, C.
dc.contributor.authorFernagu, P.
dc.contributor.authorLe Piver, D.
dc.contributor.authorMokeddem, Z.
dc.contributor.authorPelleau, P.
dc.contributor.authorRigoti, C.
dc.contributor.authorRoest, W.
dc.contributor.authorRoudaut, M.
dc.date.accessioned2019-01-18T09:52:12Z
dc.date.available2019-01-18T09:52:12Z
dc.date.issued2018-12
dc.description.abstractThe structure and nature of the crust underlying the Camamu-Almada-Jequitinhonha-Sergipe-Alagoas basins System, in the NE Brazilian margin, were investigated based on the interpretation of 12 wide-angle seismic profiles acquired during the SALSA (Sergipe ALagoas Seismic Acquisition) experiment in 2014. In this work, we present two 220-km-long NW-SE combined wide-angle and reflection seismic profiles, SL 01 and SL 02, that have been acquired using 15 ocean-bottom-seismometers along each profile, offshore the southern part of the Sergipe Alagoas Basin (SAB), north of the Vaza-Barris Transfer zone. The SL 02 has a 150-km long inland continuation with 20 land-seismic-stations until the Sergipano Fold Belt (SFB). Wide-angle seismic forward modeling allows us to precisely divide the crust in three domains: beneath the continental shelf, a similar to 100 km wide necking zone is imaged where the continental crust thins from similar to 35 km on the Unthinned Continental Domain, which displays a three-layered crust structure, to less than 8 km on the Oceanic Crust Domain. In the necking zone, the upper and the middle layers thin dramatically and almost disappear, while the Moho discontinuity shows clear PmPs. The Continental-Oceanic Crust Boundary (COB) is located at similar to 80 km from the coastline and is marked by intracrustal seismic reflectors and changes in the seismic velocity, showing a sharp transition. On profile SL02, the oceanic crust is perturbed by a volcanic edifice together with an anomalous velocity zone underneath the area.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPINHEIRO, J. M.; [et al] – Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data. Journal of South American Earth Sciences. ISSN 0895-9811. Vol. 88 (2018), pp. 649-672pt_PT
dc.identifier.doi10.1016/j.jsames.2018.09.015pt_PT
dc.identifier.issn0895-9811
dc.identifier.urihttp://hdl.handle.net/10400.21/9342
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation233613/2013-7 - Program "Science without Borders" of the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPQ) from Brazilpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S089598111730408X?token=D57440350A28F8E7CCBE5CC5F492F7C560E5320F2CA1160A290DAD6024224398D264A13F546B7E41A8AC96CBAD046A34pt_PT
dc.subjectSouth Atlantic oceanpt_PT
dc.subjectNE Brazilpt_PT
dc.subjectSergipe-Alagoas basinpt_PT
dc.subjectPassive marginspt_PT
dc.subjectWide-angle refraction seismicspt_PT
dc.subjectCrustal structurept_PT
dc.subjectTectonic inheritancept_PT
dc.titleLithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic datapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage672pt_PT
oaire.citation.startPage649pt_PT
oaire.citation.titleJournal of South American Earth Sciencespt_PT
oaire.citation.volume88pt_PT
person.familyNameEvain
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person.familyNameLoureiro
person.familyNameViana
person.familyNameRabineau
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person.familyNameBiari
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person.givenNameMikael
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person.givenNameAfonso
person.givenNameAdriano
person.givenNameMarina
person.givenNameNuno
person.givenNameMaryline
person.givenNameYoussef
person.givenNameCarlos
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rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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