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Deep crustal structure across a young passive margin from wide-angle and reflection seismic data (The SARDINIA Experiment) - I. Gulf of Lion's margin

2015Journal article Restricted access
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dc.contributor.authorMoulin, Maryline
dc.contributor.authorKlingelhoefer, Frauke
dc.contributor.authorAfilhado, Alexandra
dc.contributor.authorAslanian, Daniel
dc.contributor.authorSchnurle, Philippe
dc.contributor.authorNouze, Herve
dc.contributor.authorRabineau, Marina
dc.contributor.authorBeslier, Marie-Odile
dc.contributor.authorFeld, Aurelie
dc.date.accessioned2016-02-23T11:37:36Z
dc.date.available2016-02-23T11:37:36Z
dc.date.issued2015
dc.description.abstractThe conjugate margins system of the Gulf of Lion and West Sardinia (GLWS) represents a unique natural laboratory for addressing fundamental questions about rifting due to its landlocked situation, its youth, its thick sedimentary layers, including prominent palaeo-marker such as the MSC event, and the amount of available data and multidisciplinary studies. The main goals of the SARDINIA experiment, were to (i) investigate the deep structure of the entire system within the two conjugate margins: the Gulf of Lion and West Sardinia, (ii) characterize the nature of the crust, and (iii) define the geometry of the basin and provide important constrains on its genesis. This paper presents the results of P-wave velocity modelling on three coincident near-vertical reflection multi-channel seismic (MCS) and wide-angle seismic profiles acquired in the Gulf of Lion, to a depth of 35 km. A companion paper [part II Afilhado et al., 2015] addresses the results of two other SARDINIA profiles located on the oriental conjugate West Sardinian margin. Forward wide-angle modelling of both data sets confirms that the margin is characterised by three distinct domains following the onshore unthinned, 33 km-thick continental crust domain: Domain I is bounded by two necking zones, where the crust thins respectively from 30 to 20 and from 20 to 7 km over a width of about 170 km; the outermost necking is imprinted by the well-known T-reflector at its crustal base; Domain II is characterised by a 7 km-thick crust with anomalous velocities ranging from 6 to 7.5 km/s; it represents the transition between the thinned continental crust (Domain I) and a very thin (only 4-5 km) "atypical" oceanic crust (Domain III). In Domain II, the hypothesis of the presence of exhumed mantle is falsified by our results: this domain may likely consist of a thin exhumed lower continental crust overlying a heterogeneous, intruded lower layer. Moreover, despite the difference in their magnetic signatures, Domains II and III present the very similar seismic velocities profiles, and we discuss the possibility of a connection between these two different domains.pt_PT
dc.identifier.citationMOULIN, Maryline; [et al.] - Deep crustal structure across a young passive margin from wide-angle and reflection seismic data (The SARDINIA Experiment) - I. Gulf of Lion's margin. Bulletin de la Societe Geologique de France. ISSN 0037-9409. Vol. 186, N.º 4-5 (2015), pp. 309-330pt_PT
dc.identifier.issn0037-9409
dc.identifier.issn1777-5817
dc.identifier.urihttp://hdl.handle.net/10400.21/5696
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSocieté Geologique de Francept_PT
dc.relation.publisherversionhttp://bsgf.geoscienceworld.org/content/186/4-5/309.abstractpt_PT
dc.subjectContinental passive marginpt_PT
dc.subjectCrustal structurept_PT
dc.subjectWide-angle seismicpt_PT
dc.subjectGulf of Lionpt_PT
dc.subjectOceanic crustpt_PT
dc.subjectTransitional domainpt_PT
dc.titleDeep crustal structure across a young passive margin from wide-angle and reflection seismic data (The SARDINIA Experiment) - I. Gulf of Lion's marginpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage330pt_PT
oaire.citation.issue4-5pt_PT
oaire.citation.startPage309pt_PT
oaire.citation.titleBulletin de la Societe Geologique de Francept_PT
oaire.citation.volume186pt_PT
person.familyNameKlingelhoefer
person.familyNameAfilhado
person.familyNameAslanian
person.familyNameSchnurle
person.familyNameRabineau
person.givenNameFrauke
person.givenNameAlexandra
person.givenNameDaniel
person.givenNamePhilippe
person.givenNameMarina
person.identifier623759
person.identifier.ciencia-id7314-CD91-482F
person.identifier.orcid0000-0001-5838-0577
person.identifier.orcid0000-0003-0256-8540
person.identifier.orcid0000-0002-9394-606X
person.identifier.orcid0000-0003-4400-8402
person.identifier.orcid0000-0001-8420-1587
person.identifier.ridA-2267-2013
person.identifier.ridE-3408-2010
person.identifier.scopus-author-id24381876200
person.identifier.scopus-author-id6701517007
person.identifier.scopus-author-id35975204200
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery91916c60-275d-4200-a951-9903de48ba8f

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