3D crustal‑scale structure of the West Iberia margin: a novel approach to integrated structural characterization of passive margins

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dc.contributor.authorGranado, Cristina
dc.contributor.authorMuñoz Martín, Alfonso
dc.contributor.authorOlaiz Campos, J. A.
dc.contributor.authorFernández, Oscar
dc.contributor.authorDruet Vélez, María
dc.date.accessioned2023-06-17T09:01:28Z
dc.date.available2023-06-17T09:01:28Z
dc.date.issued2021-03-28
dc.description.abstractHyperextended margins are very heterogeneous along the entire length of the margin, so the definition of tectonic domains made exclusively from 2D seismic sections presents serious limitations. In this work we present an approach of the 3D crustal-scale structure of the West Iberia margin (WIM) by modelling eight lithospheric sections, using seismic, wells and gravity data. The continuous nature of gravity data allowed us to propose a new map of tectonic domains within the WIM. Maps of total horizontal (THD) and vertical gradients (dZ) of Bouguer anomaly have been calculated and compared with other criteria such as the crustal structure and thinning factor. This comparative analysis has been carried out on a section proposed as a model for the Western Iberian Margin (Tugend et al. in Tectonics, 2014; Cadenas et al. in Tectonics 37:758–785, 2018), and on four 2 + 1/2D gravimetric models transversal to the margin. The results point out a significant variation in the absolute values of Bouguer anomaly, thinning factor and crustal structure along the margin and, therefore, of the position of the different domain boundaries. Clear patterns that correlating the Bouguer anomaly signal and its derivatives to the tectonic domain are evidenced. Most significantly, the necking-zone and its transition to the hyperextended domain are characterized by high values of the THD of the Bouguer anomaly. The observed patterns in Bouguer anomaly and its derivatives provide a solid constraint for mapping the boundaries between different tectonic domains along the margin, even in those areas where limited deep seismic information could lead to uncertain interpretations. The results of this work can also inform on the general kinematics of the WIM.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/64653
dc.identifier.doi10.1007/s11001-021-09432-2
dc.identifier.issn0025-3235
dc.identifier.officialurlhttps://doi.org/10.1007/s11001-021-09432-2
dc.identifier.urihttps://hdl.handle.net/20.500.14352/7958
dc.issue.number10
dc.journal.titleMarine geophysical researches
dc.language.isoeng
dc.page.final30
dc.page.initial1
dc.publisherKluwer Academic Publishers.
dc.relation.projectIDMARIBNO (PGC2018-095999-B-I00)
dc.relation.projectIDCARESOIL-CM (S2018/EMT-4317)
dc.rights.accessRightsopen access
dc.subject.cdu551.24
dc.subject.keywordWest Iberian margin
dc.subject.keywordHyperextended margin
dc.subject.keywordTectonic domains
dc.subject.keywordIntegrated structural characterization
dc.subject.keywordGravity modelling
dc.subject.ucmGeofísica
dc.subject.ucmGeología
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.subject.unesco2506 Geología
dc.subject.unesco2507 Geofísica
dc.title3D crustal‑scale structure of the West Iberia margin: a novel approach to integrated structural characterization of passive margins
dc.typejournal article
dc.volume.number42
dspace.entity.typePublication
relation.isAuthorOfPublication70f369a3-b3cd-43cb-874e-a7888da25de1
relation.isAuthorOfPublication81c6fb08-579c-448f-93f6-ac4000ebb551
relation.isAuthorOfPublication.latestForDiscovery70f369a3-b3cd-43cb-874e-a7888da25de1
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