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Syndepositional faulting in the Grès d'Annot Formation, SE France: high-resolution kinematic analysis and stratigraphic response to growth faulting

By
Renaud Bouroullec
Renaud Bouroullec
1
T. H. Huxley School of Environment, Earth Sciences and Engineering, Royal School of Mines, Imperial College of Science, Technology & Medicine
Prince Consort Road, London SW7 2BP, UK
renaud@emarc.colorado.edu
*
Energy and Mineral Applied Research Center, Department of Geological Sciences CB 399, University of Colorado
Boulder, Colorado 80302-0399, USA
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;
Joe A. Cartwright
Joe A. Cartwright
1
T. H. Huxley School of Environment, Earth Sciences and Engineering, Royal School of Mines, Imperial College of Science, Technology & Medicine
Prince Consort Road, London SW7 2BP, UK
renaud@emarc.colorado.edu
Cardiff University
P.O. Box 914, Cardiff CF1 3YE, UK
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Howard D. Johnson
Howard D. Johnson
1
T. H. Huxley School of Environment, Earth Sciences and Engineering, Royal School of Mines, Imperial College of Science, Technology & Medicine
Prince Consort Road, London SW7 2BP, UK
renaud@emarc.colorado.edu
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Christophe Lansigu
Christophe Lansigu
2
Geosciences Rennes, Rennes University
Bat 15, Campus de Beaulieu, 35042 Rennes Cedex, France
Geologis
Le Bourg, 63450, France
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Jean-Marie Quémener
Jean-Marie Quémener
2
Geosciences Rennes, Rennes University
Bat 15, Campus de Beaulieu, 35042 Rennes Cedex, France
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Dominique Savanier
Dominique Savanier
2
Geosciences Rennes, Rennes University
Bat 15, Campus de Beaulieu, 35042 Rennes Cedex, France
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Published:
January 01, 2004

Abstract

The presence of syndepositional reservoir scale faulting in the Grès d'Annot Formation adds an additional level of complexity in understanding the stratigraphic architecture of these, and potentially other, deep-water reservoir successions. A series of five synsedimentary faults have been characterized in relation to the high-resolution depositional framework of the Annot deep-water sandstone, faults that were active at the time of deposition of the Grès d'Annot, influencing both stratigraphic architecture and depositional processes. The five faults have normal throw, strike NE-SW (perpendicular to the regional palaeocurrent direction), and have maximum syndepositional throws of between 5 and 30m (sub-seismic-resolution scale). To understand the nature of the synsedimentary faulting, a high-resolution stratigraphic framework was developed from six vertical sedimentary sections measured along the 600m high cliff face, and from detailed correlations along photomosaic panels. Ten lithofacies have been identified and grouped into three different architectural elements that have been used as reference units for the high-resolution kinematic analysis. Syndepositional deformation of these architectural elements indicates that the faults had a polycyclic kinematic behaviour. In the hanging wall, abrupt pinchout of sandstone bodies and unusual local variations in sandstone texture also support the influence of faulting during deposition.

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Contents

Geological Society, London, Special Publications

Deep-Water Sedimentation in the Alpine Basin of SE France: New perspectives on the Grès d'Annot and related systems

P. Joseph
P. Joseph
Institut Français du Pétrole, France
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S. A. Lomas
S. A. Lomas
Baker Atlas Geoscience, UK
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Geological Society of London
Volume
221
ISBN electronic:
9781862394698
Publication date:
January 01, 2004

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