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Crustal structure and continent‐ocean boundary along the Galicia continental margin (NW Iberia): insights from combined gravity and seismic interpretation

dc.contributor.authorDruet Vélez, María
dc.contributor.authorMuñoz Martín, Alfonso
dc.contributor.authorGranja Bruña, José Luis
dc.contributor.authorCarbó Gorosabel, Andrés
dc.contributor.authorAcosta, Juan
dc.contributor.authorLlanes Estrada, Pilar
dc.contributor.authorErcilla, Gemma
dc.date.accessioned2023-06-15T06:21:22Z
dc.date.available2023-06-15T06:21:22Z
dc.date.issued2018-04
dc.description.abstractThe magma‐poor rifted continental margin of Galicia has an extremely complex structure. Its formation involved several rifting episodes that occurred ultimately during the early Cretaceous near a ridge triple junction, which produced a change in the orientation of the main structures in its transition to the north Iberia margin. In addition, there is a superimposed partial tectonic inversion along its northwest and northern border which developed from the Late Cretaceous to at least Oligocene times. The present study integrates a large volume of new geophysical information (mainly marine gravity data and 2D seismic reflection profiles) to provide insights on the formation of this rift system and on the development of its later inversion. The combined interpretation and modeling of this data enable the presentation of a new crustal and structural domains map for the whole Galicia margin. This includes the rift domains related to the extreme thinning of the crust and the lithospheric mantle (stretched, necking, and hyperextension and mantle exhumation (HME) domains), as well as a domain of intense compressional deformation. New constraints arise on the origin, the deep structure, and the characterization of the along‐ and across‐strike variation of the continent‐ocean transition of the margin, where a progressive change from hyperextension to partial inversion is observed. The development of both rifting and later partial tectonic inversion is influenced by the existence of former first‐order tectonic features. Most of the tectonic inversion is focused on the HME domain, which in some areas of the northwestern margin is completely overprinted by compressional deformation.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Defensa
dc.description.sponsorshipUniversidad Complutense de Madrid
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/47285
dc.identifier.doi10.1029/2017TC004903
dc.identifier.issn1944-9194
dc.identifier.officialurlhttps://agupubs.onlinelibrary.wiley.com/journal/19449194
dc.identifier.urihttps://hdl.handle.net/20.500.14352/161
dc.journal.titleTectonics
dc.language.isoeng
dc.publisherAGU
dc.relation.projectIDERGAP Project
dc.rights.accessRightsopen access
dc.subject.cdu550.3(261)
dc.subject.cdu551.46(261)
dc.subject.keywordcrustal structure
dc.subject.keywordGalicia continental margin
dc.subject.keywordgravity
dc.subject.keywordseismic
dc.subject.ucmGeofísica
dc.subject.ucmGeología
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.subject.unesco2506 Geología
dc.subject.unesco2507 Geofísica
dc.titleCrustal structure and continent‐ocean boundary along the Galicia continental margin (NW Iberia): insights from combined gravity and seismic interpretation
dc.typejournal article
dspace.entity.typePublication

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