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Title: Early-Middle Miocene subtle compressional deformation in the Ebro foreland basin (northern Spain); insights from magnetic fabrics
Author: Soto, R.
Larrasoaña, J.C.
Beamud Amorós, Elisabet
Garcés Crespo, Miguel
Keywords: Magnetisme
Ebre, Conca de l'
Deformació de les roques
Ebro River Watershead
Rock deformation
Issue Date: 2016
Publisher: Elsevier Masson SAS
Abstract: The results of anisotropy of magnetic susceptibility analyses of 19 sites carried out on magnetostrigraphically-dated, Lower to Middle Miocene (20.4 to 13.7 Ma) 'non-deformed' mudstones from the central part of the Ebro basin reveal the presence of a subtle tectonic overprint lasting at least until the Langhian (Middle Miocene) in the southern Pyrenean foreland. Magnetic ellipsoids show a sedimentary fabric in 42% of sites and a weak and well-defined magnetic lineation in 47% and 11% of sites. The magnetic lineation is roughly oriented around the east-west direction, compatible with a very weak deformation occurring there and related to the north-south compression linked to the convergence between Europe, Iberia and Africa during the Early-Middle Miocene. A slight variation of the magnetic parameters Km, Pj, and T exists through time, probably due to changes in the sedimentary conditions in the basin.
Note: Versió postprint del document publicat a:
It is part of: Comptes Rendus Geoscience, 2016, vol. 348, num. 3-4, p. 213-223
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ISSN: 1631-0713
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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