Detrital Zircons from the Ordovician Rocks of the Pyrenees: Geochronological Constraints and Provenance
TECTO-127007; No of Pages 11 Tectonophysics xxx (2016) xxx–xxx Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Detrital zircons from the Ordovician rocks of the Pyrenees: Geochronological constraints and provenance Aina Margalef a,⁎, Pedro Castiñeiras b, Josep Maria Casas c,MarinaNavidadb, Montserrat Liesa d, Ulf Linnemann e, Mandy Hofmann e, Andreas Gärtner e a Centre d'Estudis de la Neu i de la Muntanya d'Andorra, Institut d'Estudis Andorrans, Andorra b Departamento de Petrología y Geoquímica, Universidad Complutense de Madrid, 28040 Madrid, Spain c Departament de Geodinàmica i Geofísica-Institut de Recerca GEOMODELS, Universitat de Barcelona (UB), Martí i Franquès s/n, Barcelona 08028, Spain d Departament de Geoquímica, Petrologia i Prospecció Geològica, Universitat de Barcelona (UB), Martí i Franquès s/n, Barcelona 08028, Spain e Senckenberg Naturhistorische Sammlungen Dresden, Museum für Mineralogie und Geologie, Sektion Geochronologie, Königsbrücker Landstraße 159, D-01109 Dresden, Germany article info abstract Article history: The first LA-ICP-MS U–Pb detrital zircon ages from quartzites located below (three samples) and above (one Received 31 August 2015 sample) the Upper Ordovician unconformity in the Central Pyrenees (the Rabassa Dome, Andorra) were investi- Received in revised form 9 March 2016 gated. The maximum depositional age for the Jújols Group, below the unconformity, based on the youngest Accepted 14 March 2016 detrital zircon population, is around 475 Ma (Early Ordovician), whereas for the Bar Quartzite Fm., above the Available online xxxx unconformity, the presence of only two zircons of 442 and 443 Ma precludes obtaining a precise maximum sed- Keywords: imentation age.
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