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Time, place and mode of propagation of foreland basin systems as recorded by the sedimentary fill: examples of the Late Cretaceous and Eocene retro-foreland basins of the north-eastern Pyrenees

By
F. Christophoul
F. Christophoul
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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J.-C. Soula
J.-C. Soula
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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S. Brusset
S. Brusset
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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B. Elibana
B. Elibana
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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M. Roddaz
M. Roddaz
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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G. Bessiere
G. Bessiere
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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J. Deramond
J. Deramond
Laboratoire des Mécanismes de Transferts en Géologie, UMR 5563, Université Paul Sabatier, 38 rue des 36 ponts, 31400 Toulouse, France (e-mail: christop@cict.fr)
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Published:
January 01, 2003

Abstract

The relationship between tectonics and sedimentary fill has been studied in two syncontractional basins of the western Corbières (eastern North Pyrenean retro-foreland basin). The Late Cretaceous basin formed during c. 10–12 Ma as a result of left-lateral transpressional deformation, and is composed of forward-younging sub-basins characterized by reworking of the forelimbs of growing fold-propagation folds. Thrust-wedge advance and cratonward migration of the platform are recorded by a deepening-upward stacking pattern indicating increased regional subsidence with a limited contribution of the submarine orogen. Tectonic quiescence and erosional unloading lasting 29–30 Ma are recorded by a shallowing-upward stacking pattern, and fluvial sedimentation issued from widespread sources in the emerging inner orogen. The Early to Middle Eocene basin formed as a result of pure shortening normal to the range. The marine Early Eocene basin developed during c.2 Ma by widening of a single basin provoked by the two-step propagation of a basement duplex. This is recorded by growth-stratal patterns and coarsening-upward depositional sequences indicating the increasing contribution of the emerged orogen. The Middle Eocene continental deposits infilled two sub-basins working synchronously and were transported by alluvial fans with a provenance in the inner orogen, during decreasing thrust-wedge advance and increasing erosional unloading.

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Contents

Geological Society, London, Special Publications

Tracing Tectonic Deformation Using the Sedimentary Record

T. McCann
T. McCann
Geologisches Institut, Bonn, Germany
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A. Saintot
A. Saintot
Instituut voor Aardwetenschappen, Vrije Universiteit, The Netherlands
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Geological Society of London
Volume
208
ISBN electronic:
9781862394568
Publication date:
January 01, 2003

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