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Estimation of the Crustal Bulk Properties Beneath Mainland Portugal from P-Wave Teleseismic Receiver Functions

2016-03-08Journal article Restricted access
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dc.contributor.authorDündar, Süleyman
dc.contributor.authorDias, Nuno
dc.contributor.authorSilveira, Graça
dc.contributor.authorKind, Rainer
dc.contributor.authorVinnik, Lev
dc.contributor.authorMatias, Luís
dc.contributor.authorBianchi, Marcelo
dc.date.accessioned2016-04-13T13:10:02Z
dc.date.available2016-04-13T13:10:02Z
dc.date.issued2016-03-08
dc.description.abstractIn this work, we present results from teleseismic P-wave receiver functions (PRFs) obtained in Portugal, Western Iberia. A dense seismic station deployment conducted between 2010 and 2012, in the scope of the WILAS project and covering the entire country, allowed the most spatially extensive probing on the bulk crustal seismic properties of Portugal up to date. The application of the H-κ stacking algorithm to the PRFs enabled us to estimate the crustal thickness (H) and the average crustal ratio of the P- and S-waves velocities V p/V s (κ) for the region. Observations of Moho conversions indicate that this interface is relatively smooth with the crustal thickness ranging between 24 and 34 km, with an average of 30 km. The highest V p/V s values are found on the Mesozoic-Cenozoic crust beneath the western and southern coastal domain of Portugal, whereas the lowest values correspond to Palaeozoic crust underlying the remaining part of the subject area. An average V p/V s is found to be 1.72, ranging 1.63-1.86 across the study area, indicating a predominantly felsic composition. Overall, we systematically observe a decrease of V p/V s with increasing crustal thickness. Taken as a whole, our results indicate a clear distinction between the geological zones of the Variscan Iberian Massif in Portugal, the overall shape of the anomalies conditioned by the shape of the Ibero-Armorican Arc, and associated Late Paleozoic suture zones, and the Meso-Cenozoic basin associated with Atlantic rifting stages. Thickened crust (30-34 km) across the studied region may be inherited from continental collision during the Paleozoic Variscan orogeny. An anomalous crustal thinning to around 28 km is observed beneath the central part of the Central Iberian Zone and the eastern part of South Portuguese Zone.pt_PT
dc.identifier.citationDUNDAR, Süleyman; [ET AL] - Estimation of the Crustal Bulk Properties Beneath Mainland Portugal from P-Wave Teleseismic Receiver Functions. Pure and Applied Geophysics. 2016pt_PT
dc.identifier.doi10.1007/s00024-016-1257-4pt_PT
dc.identifier.issn1420-9136
dc.identifier.issn0033-4553
dc.identifier.urihttp://hdl.handle.net/10400.21/5962
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer International Publishingpt_PT
dc.relation.publisherversionhttp://link.springer.com/article/10.1007/s00024-016-1257-4pt_PT
dc.subjectCrustal structurept_PT
dc.subjectBody wavespt_PT
dc.subjectSeismology Europept_PT
dc.subjectComposition of the continental crustpt_PT
dc.subjectReceiver functionpt_PT
dc.titleEstimation of the Crustal Bulk Properties Beneath Mainland Portugal from P-Wave Teleseismic Receiver Functionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage22pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titlePure and Applied Geophysicspt_PT
person.familyNameDündar
person.familyNameDias
person.familyNameSilveira
person.familyNameKind
person.familyNameVinnik
person.givenNameSüleyman
person.givenNameNuno
person.givenNameGraça
person.givenNameRainer
person.givenNameLev
person.identifier1348964
person.identifier91922
person.identifier.ciencia-idDB10-5086-2205
person.identifier.ciencia-id1116-1080-16F3
person.identifier.orcid0000-0001-6518-2296
person.identifier.orcid0000-0001-7672-4476
person.identifier.orcid0000-0002-2110-2554
person.identifier.orcid0000-0001-7043-7978
person.identifier.orcid0000-0002-1135-6200
person.identifier.ridB-2778-2008
person.identifier.ridA-3081-2009
person.identifier.scopus-author-id56640885300
person.identifier.scopus-author-id6602698071
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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