Alpine paleostress reconstruction and active faulting in western Iberia

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dc.contributor.authorAntón López, Loreto
dc.contributor.authorMuñoz Martín, Alfonso
dc.contributor.authorVicente Muñoz, Gerardo De
dc.date.accessioned2023-06-20T00:02:08Z
dc.date.available2023-06-20T00:02:08Z
dc.date.issued2010-05-07
dc.description.abstractThe study of intraplate tectonics is crucial for understanding the deformation within plates, far from active plate boundaries and associated stress transmission to the plate interiors. This paper examines the tectonic evolution of the Variscan basement at the western margin of the Cenozoic Duero basin. Located east of the Vilariça Fault System in NW Iberia, this intraplate zone is a relatively flat but elevated area with an intense NNE-SSW trending fault system and associated moderate seismicity. Although the area has played an important role in the Duero basin configuration, its Alpine to present-day tectonic evolution has not been well constrained. In order to characterize the successive paleostress fields, 1428 pairs of fault-striae were measured at 56 sites and two focal mechanisms were used. Stress inversion methods have been applied to analyze paleostress regimes. Results show the existence of three dominant maximum horizontal stress (Shmax) trends: N-S, NE-SW and E-W. Relative and absolute dating of the activated faults for each Shmax shows that the clearly predominant N-S paleostress field in the zone has been active since the Oligocene up to the present day; while a NE-SW stress field is found to have been active during the Cretaceous and an older E-W paleostress field was active in the earlier Alpine cycle (Late Triassic).
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Educación y Ciencia
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/10624
dc.identifier.doi10.2478/v10085-010-0006-7
dc.identifier.issn1896-1517
dc.identifier.officialurlhttp://versita.com/science/geosciences/cejg/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/41768
dc.issue.number2
dc.journal.titleCentral European Journal of Geosciences
dc.language.isoeng
dc.page.final164
dc.page.initial152
dc.publisherVersita
dc.relation.projectIDCGL2006-13926-C02-01-02
dc.relation.projectIDCSD2006-00041
dc.rights.accessRightsopen access
dc.subject.keywordStress tensor
dc.subject.keywordFault
dc.subject.keywordPaleostress fields
dc.subject.keywordIntraplate tectonics
dc.subject.keywordWestern Duero Basin
dc.subject.keywordIberia
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.titleAlpine paleostress reconstruction and active faulting in western Iberia
dc.typejournal article
dc.volume.number2
dspace.entity.typePublication
relation.isAuthorOfPublicationd2462af2-5512-4ceb-afb5-918ef99bf6c6
relation.isAuthorOfPublication70f369a3-b3cd-43cb-874e-a7888da25de1
relation.isAuthorOfPublication09af5f8f-e65c-4c2b-8583-c1c43e152589
relation.isAuthorOfPublication.latestForDiscoveryd2462af2-5512-4ceb-afb5-918ef99bf6c6
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