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Title

Early-Middle Miocene subtle compressional deformation in the Ebro foreland basin (northern Spain); insights from magnetic fabrics

AuthorsSoto, Ruth ; Larrasoaña, Juan C. ; Beamud, Elisabet ; Garcés, Miguel
KeywordsAnisotropy of Magnetic Susceptibility (AMS)
Ebro foreland basin
Subtle deformation
Issue Date2016
PublisherElsevier
CitationComptes Rendus Geoscience, 348(3–4): 213–223 (2016)
AbstractThe 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.
Publisher version (URL)http://dx.doi.org/10.1016/j.crte.2015.10.009
URIhttp://hdl.handle.net/10261/133216
DOI10.1016/j.crte.2015.10.009
ISSN1631-0713
Appears in Collections:(ICTJA) Artículos
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