Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/176960
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Active fault control in the distribution of Elevated Low Relief Topography in the Central-Western Pyrenees

AutorOrtuño, M.; Viaplana-Muzas, M.
Palabras claveDrainage divide
Neotectonics
Post-orogenic uplift
DEM analysis
Low Relief Topography (LRT)
Fecha de publicacióndic-2018
EditorUniversidad de Barcelona
CitaciónGeologica Acta, 16(4): 499-518 (2019)
ResumenThe activity of normal faults in the Central-Western Pyrenees is mainly detected by the disruption of paleic landforms surviving to Plio-Quaternary incision: the remnants of a Low-Relief Topography (LRT) that probably originated asynchronically during the Oligocene and Miocene. We propose a new method for mapping the LRT remnants that combines automatic analysis of digital topography and cross-checking with regional databases of Quaternary landforms. We focus on an area where the location of the main-drainage divide seems to be influenced by the activity of the Bedous-Pic de Midi du Bigorre set of faults and by the North Maladeta Fault. Neotectonic markers defined by the remnants of LRT envelops are tectonically displaced up to similar to 700m by the previously identified faults, but also along new faults observed in between them. A western prolongation of the North Maladeta Fault has been identified for the first time, implying a 75km total trace length, almost twice the previously published value. A restoration of the fault block motion was performed assuming a regional uplift across the range, enhanced in the northern part of the Axial Zone. This uplift leads to an outer arch extension along the Maladeta-Bedous Fault System. The resulting paleo-topography shows a broad southern paleo-flank (up to similar to 120km long) with a gentle regional gradient (similar to 1 degrees) and a much shorter and steeper northern paleo-flank (similar to 4 degrees gradient, up to 30km-long). This configuration suggests that the LRT remnants now located North of the main divide were connected to the Ebro Basin. The results are supported by previous studies on age and source provenance of major alluvial systems mantling the northern and southern flanks of the chain.
Versión del editorhttp://dx.doi.org/10.1344/GeologicaActa2018.16.4.10
URIhttp://hdl.handle.net/10261/176960
DOI10.1344/GeologicaActa2018.16.4.10
ISSN1695-6133
Aparece en las colecciones: (Geo3Bcn) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Viaplana_Geologica_Acta_16_4_499.pdf5,73 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

9
checked on 25-mar-2024

WEB OF SCIENCETM
Citations

9
checked on 29-feb-2024

Page view(s)

215
checked on 28-mar-2024

Download(s)

212
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


Este item está licenciado bajo una Licencia Creative Commons Creative Commons