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Detrital-zircon U-Pb and (U-Th)/He double-dating provenance signatures in the Jaca foreland basin : Interplay of direct vs recycled sources during Pyrenean orogenic growth
Coll, Xavier (Universitat Autònoma de Barcelona. Departament de Geologia)
Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia)
Roigé, Marta (Universitat Autònoma de Barcelona. Departament de Geologia)
Stockli, Daniel F. (The University of Texas at Austin. Department of Geological Sciences)
Teixell Cácharo, Antonio (Universitat Autònoma de Barcelona. Departament de Geologia)
Boya, Salvador (Universitat Autònoma de Barcelona. Departament de Geologia)

Data: 2024
Resum: The Eocene to Miocene clastic wedge of the south Pyrenean basin constitutes a reference model to understand the progressive evolution of sediment provenance and source-to-sink dynamics in a foreland basin. We present new detrital-zircon (DZ) U-Pb and U-Pb-He (ZHe) double-dating data from the Jaca basin and the Ebro basin, providing insights into the evolution of the sedimentary systems that record a major tectonic and drainage reorganization from the late Eocene to Miocene. Three distinct DZ U-Pb signatures have been identified: i) Variscan dominated, ii) mixed Cadomian-Variscan, iii) Cadomian dominated, and two DZ ZHe signatures: i) Pyrenean dominated, ii) pre-Pyrenean dominated. Coupling DZ U-Pb, ZHe, and petrographic data allows us to discriminate among distinct Pyrenean sources as well as to understand how DZ signatures are propagated in a source-to-sink system. Our results indicate that while the eastern Jaca basin was fed from eastern source areas located in the central and eastern Pyrenees, the western Jaca basin was fed from the Basque massifs and the Urbasa-Andía Sierra (Basque-Cantabrian Pyrenees).
Ajuts: Agencia Estatal de Investigación PID2021-122467NB-C21
Agencia Estatal de Investigación PGC2018-093903-B-C21
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Llengua: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Publicat a: Journal of Sedimentary Research, Vol. 94, Num. 4 (August 2024) , p. 467-487, ISSN 1938-3681

DOI: 10.2110/jsr.2023.066


Postprint
71 p, 7.3 MB

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 Registre creat el 2024-07-23, darrera modificació el 2025-03-23



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