Interplay of Multiple Sediment Routing Systems Revealed by Combined Sandstone Petrography and Heavy Mineral Analysis (HMA) in the South Pyrenean Foreland Basin
Coll, Xavier (Universitat Autònoma de Barcelona. Departament de Geologia)
Roigé, Marta (Universitat Autònoma de Barcelona. Departament de Geologia)
Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia)
Teixell Cácharo, Antonio (Universitat Autònoma de Barcelona. Departament de Geologia)
Boya, Salvador (Universitat Autònoma de Barcelona. Departament de Geologia)
Mestres i Andreu, Narcís (Institut de Ciència de Materials de Barcelona)

Data:	2022
Resum:	Combined sandstone petrography and heavy mineral analysis allow to decipher different sediment routing systems that could not be resolved by one method alone in the South Pyrenean foreland basin. We apply this approach to deltaic and alluvial deposits of the southern part of the Jaca basin, and in the time equivalent systems of the nearby Ainsa and Ebro basins, in order to unravel the evolution of source areas and the fluvial drainage from the Eocene to the Miocene. Our study allows the identification of four petrofacies and five heavy-mineral suites, which evidence the interplay of distinct routing systems, controlled by the emergence of tectonic structures. Two distinct axially-fed systems from the east coexisted in the fluvial Campodarbe Formation of the southern Jaca basin that were progressively replaced from east to west by transverse-fed systems sourced from northern source areas. In the late stages of evolution, the Ebro autochthonous basin and the Jaca piggy-back basin received detritus from source areas directly north of the basin from the Axial Zone and from the Basque Pyrenees. Coupling sandstone petrography with heavy mineral provenance analysis allows challenging the existing model of the South Pyrenean sediment dispersal, highlighting the relevance of this approach in source-to-sink studies.
Ajuts:	Ministerio de Economía y Competitividad CGL2014-54180-P Agencia Estatal de Investigación PGC2018-093903-B-C21 Ministerio de Educación, Cultura y Deporte FPU16/00219
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Provenance ; Sandstone petrography ; Heavy minerals ; Sediment routing systems ; Jaca basin ; South Pyrenean foreland ; Pyrenees
Publicat a:	Minerals, Vol. 12, Num. 2 (February 2022) , art. 262, ISSN 2075-163X

DOI: 10.3390/min12020262

29 p, 17.9 MB

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