Repository logo
 
Publication

From the Bay of Biscay to the High Atlas: completing the anisotropic characterization of the upper mantle beneath the westernmost Mediterranean region

2015-11-16Journal article Restricted access
Simple item page
dc.contributor.authorDíaz, J.
dc.contributor.authorGallart, J.
dc.contributor.authorMorais, I.
dc.contributor.authorSilveira, Graça
dc.contributor.authorPedreira, D.
dc.contributor.authorPulgar, J.A.
dc.contributor.authorDias, Nuno
dc.contributor.authorRuiz, M.
dc.contributor.authorGonzález-Cortina, J.M.
dc.date.accessioned2016-03-15T16:47:19Z
dc.date.available2016-03-15T16:47:19Z
dc.date.issued2015-11-16
dc.description.abstractThe knowledge of the anisotropic properties beneath the Iberian Peninsula and Northern Morocco has been dramatically improved since late 2007 with the analysis of the data provided by the dense TopoIberia broadband seismic network, the increasing number of permanent stations operating in Morocco, Portugal and Spain, and the contribution of smaller scale/higher resolution experiments. Results from the two first TopoIberia deployments have evidenced a spectacular rotation of the fast polarization direction (FPD) along the Gibraltar Arc, interpreted as an evidence of mantle flow deflected around the high velocity slab beneath the Alboran Sea, and a rather uniform N100 degrees E FPD beneath the central Iberian Variscan Massif, consistent with global mantle flow models taking into account contributions of surface plate motion, density variations and net lithosphere rotation. The results from the last Iberarray deployment presented here, covering the northern part of the Iberian Peninsula, also show a rather uniform FPD orientation close to N100 degrees E, thus confirming the previous interpretation globally relating the anisotropic parameters to the LPO of mantle minerals generated by mantle flow at asthenospheric depths. However, the degree of anisotropy varies significantly, from delay time values of around 0.5 s beneath NW Iberia to values reaching 2.0 sin its NE comer. The anisotropic parameters retrieved from single events providing high quality data also show significant differences for stations located in the Variscan units of NW Iberia, suggesting that the region includes multiple anisotropic layers or complex anisotropy systems. These results allow to complete the map of the anisotropic properties of the westernmost Mediterranean region, which can now be considered as one of best constrained regions worldwide, with more than 300 sites investigated over an area extending from the Bay of Biscay to the Sahara platform. (C) 2015 Elsevier B.V. All rights reserved.pt_PT
dc.identifier.citationDÍAZ, J.; [et al.] - From the Bay of Biscay to the High Atlas: completing the anisotropic characterization of the upper mantle beneath the westernmost Mediterranean region. Tectonophysics. ISSN. 0040-1951. Vol. 663, SI (2015), pp. 192-202pt_PT
dc.identifier.doi10.1016/j.tecto.2015.03.007pt_PT
dc.identifier.issn0040-1951
dc.identifier.issn1879-3266
dc.identifier.urihttp://hdl.handle.net/10400.21/5870
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherELSEVIER SCIENCE BVpt_PT
dc.relation.ispartofseriesSI;
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0040195115001742pt_PT
dc.subjectAnisotropypt_PT
dc.subjectSKS splittingpt_PT
dc.subjectMantle flowpt_PT
dc.subjectIberiapt_PT
dc.subjectMoroccopt_PT
dc.subjectWestern Mediterraneanpt_PT
dc.titleFrom the Bay of Biscay to the High Atlas: completing the anisotropic characterization of the upper mantle beneath the westernmost Mediterranean regionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage202pt_PT
oaire.citation.startPage192pt_PT
oaire.citation.volume663pt_PT
person.familyNameSilveira
person.familyNameDias
person.givenNameGraça
person.givenNameNuno
person.identifier91922
person.identifier1348964
person.identifier.ciencia-id1116-1080-16F3
person.identifier.ciencia-idDB10-5086-2205
person.identifier.orcid0000-0002-2110-2554
person.identifier.orcid0000-0001-7672-4476
person.identifier.ridA-3081-2009
person.identifier.ridB-2778-2008
person.identifier.scopus-author-id6602698071
person.identifier.scopus-author-id56640885300
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd4ff725a-b30b-4acb-906d-b60530a4994f
relation.isAuthorOfPublicationd7e4c7da-29b6-439f-ab4a-f5d94c1d7ca5
relation.isAuthorOfPublication.latestForDiscoveryd7e4c7da-29b6-439f-ab4a-f5d94c1d7ca5

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
From the Bay of Biscay to the High Atlas completing the anisotropic characterization of the upper mantle beneath the westernmost Mediterranean region.pdf
Size:
2.98 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Física - Artigos