Orogenic reworking and reactivation in Central Iberia: A record of Variscan, Permian and Alpine tectonics

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dc.contributor.authorMoreno Martín, Diana
dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorVicente Muñoz, Gerardo de
dc.contributor.authorFernández Rodríguez, Carlos
dc.contributor.authorGómez Barreiro, Juan
dc.date.accessioned2023-06-22T12:27:50Z
dc.date.available2023-06-22T12:27:50Z
dc.date.issued2022-11-20
dc.descriptionCRUE-CSIC (Acuerdos Transformativos 2022)
dc.description.abstractInterference between orogenic systems and deformation phases within them may lead to reworking and reactivation of previous structures. The eastern sector of the Spanish-Portuguese Central System holds evidence of two orogenic systems, Variscan and Alpine, plus a stage of Permian extension. We perform an integrated structural analysis to identify reworking and reactivation processes throughout the geological record. The Variscan record starts with crustal thickening (D1; E-verging overturned folds). A second phase features the intra-orogenic collapse of an overthickened crust (D2; top-to-the-SE ductile extensional shear zone), which produced intense structural reworking at the core of the shear zone and moderate reworking at its hanging wall. During subsequent strike-slip tectonics, crustal thickening parted transpressional deformation into a dextral shear zone and upright folds (D3). Variscan deformation did not reactivate previous structures, but exploited a weak rheological boundary defined by contrasted lithologies (sedimentary versus igneous rocks) to accommodate D2 shearing. Reactivation played a role afterwards: Variscan strike-slip shear zone acted as a transfer fault to accommodate Permian extension (post-orogenic collapse), and then Alpine contraction. The Permian extension record is blurred by Alpine inversion, although the trend of Alpine structures in Central Iberia, and the Spanish-Portuguese Central System, may result from Permian structural inheritance.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipUniversidad de Salamanca
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/75351
dc.identifier.doi10.1016/j.tecto.2022.229601
dc.identifier.issn0040-1951, online ISSN: 1879-3266
dc.identifier.officialurlhttps://doi.org/10.1016/j.tecto.2022.229601
dc.identifier.urihttps://hdl.handle.net/20.500.14352/72566
dc.issue.number229601
dc.journal.titleTectonophysics
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDPID2020-112489GB-C22; MCIN/AEI/ 10.13039/501100011033
dc.relation.projectIDMUGA21
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.cdu551.24(460)
dc.subject.keywordExtensional collapse
dc.subject.keywordTectonic inversion
dc.subject.keywordCollisional orogen
dc.subject.keywordIntraplate orogen
dc.subject.keywordIberian Massif
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.titleOrogenic reworking and reactivation in Central Iberia: A record of Variscan, Permian and Alpine tectonics
dc.typejournal article
dc.volume.number843
dspace.entity.typePublication
relation.isAuthorOfPublication5a03ae3f-5399-488e-b3ba-546c9011caa8
relation.isAuthorOfPublication30782bfb-a69a-414e-b90f-01c04a54467c
relation.isAuthorOfPublicationa1923245-aea2-4606-b726-d329291980fc
relation.isAuthorOfPublication.latestForDiscovery5a03ae3f-5399-488e-b3ba-546c9011caa8
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