U-Pb Ages of Detrital Zircons from the Permo-Triassic Series of the Iberian Ranges: A Record of Variable Provenance during Rift Propagation

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dc.contributor.authorSánchez Martínez, Sonia
dc.contributor.authorHorra Del Barco, Raúl De La
dc.contributor.authorArenas Martín, Ricardo
dc.contributor.authorGerdes, A.
dc.contributor.authorGalán Abellán, Ana Belén
dc.contributor.authorLópez Gómez, José
dc.contributor.authorFernández Barrenechea, José María
dc.contributor.authorArche, Alfredo
dc.date.accessioned2023-06-20T00:20:55Z
dc.date.available2023-06-20T00:20:55Z
dc.date.issued2012
dc.description.abstractThe provenance of the Permo-Triassic series of the Talayuelas anticline (Iberian Ranges) have been studied using UPb geochronology (laser ablation inductively coupled plasma mass spectrometry) of detrital zircons. These intracontinental siliciclastic series were formed by extensive sandy braided fluvial systems associated with ephemeral lake deposits and aeolian sediments, with paleocurrents suggesting constant NW-SE transport directions. Upper Permian reddish sandstones from the Upper Alcotas Formation (Lopingian) contain a dominant Variscan zircon population (290–360 Ma), which indicates source areas located in the axial zone of the Variscan belt, in the core of the Ibero- Armorican arc. However, in the Lower Triassic sandstones of the Canñizar Formation (Olenekian), the Variscan zircon population is almost completely replaced by Cadomian zircons (520–750 Ma), with important Avalonian (390–520 Ma), Mesoproterozoic (900–1750 Ma), Eburnian (1.78–2.35 Ga), and post-Eburnian and Archaean (12.4 Ga) zircon populations. This detrital zircon content now suggests source areas located more to the NW, in the Avalonian microcontinent, although a limited supply coming from the southern part of Laurentia cannot be ruled out. Finally, in the Middle Triassic (Anisian), the source areas returned to the Variscan axial zone, since the Variscan zircon population is again highly dominant during this period. The changes detected in the source areas of the Permo-Triassic series are related to the development and propagation of the Iberian rift, one of the large extensional structures that determined the generation of the sedimentary basins and finally caused the breakup of Pangea. The methodology followed in this article is very useful to understand the generation and evolution of these intracontinental basins and also the relationships between the different rift systems generated in the North Atlantic realm during the Permo- Triassic times.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/17410
dc.identifier.doi10.1086/663983
dc.identifier.issn0022-1376
dc.identifier.officialurlhttp://www.journals.uchicago.edu/page/jg/brief.html
dc.identifier.urihttps://hdl.handle.net/20.500.14352/42436
dc.journal.titleThe Journal of geology
dc.language.isoeng
dc.page.final154
dc.page.initial135
dc.publisherChicago, University of Chicago Press.
dc.rights.accessRightsopen access
dc.subject.cdu550.93
dc.subject.cdu551.3.051
dc.subject.keywordU-Pb Ages
dc.subject.keywordPermo-Triassic
dc.subject.ucmGeología estratigráfica
dc.subject.unesco2506.19 Estratigrafía
dc.titleU-Pb Ages of Detrital Zircons from the Permo-Triassic Series of the Iberian Ranges: A Record of Variable Provenance during Rift Propagation
dc.typejournal article
dc.volume.number120
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery23c93f55-b253-4f57-9df0-b6f3c6bc61c3
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