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The southern Grès d'Annot outcrops (French Alps): an attempt at regional correlation

By
E. Du Fornel
E. Du Fornel
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
2
Geosciences Rennes
Campus de Beaulieu, 35042 Rennes, France
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;
P. Joseph
P. Joseph
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
G. Desaubliaux
G. Desaubliaux
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
R. Eschard
R. Eschard
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
F. Guillocheau
F. Guillocheau
2
Geosciences Rennes
Campus de Beaulieu, 35042 Rennes, France
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;
O. Lerat
O. Lerat
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
C. Muller
C. Muller
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
C. Ravenne
C. Ravenne
1
IFP
1-4 avenue de Bois-Préau, 92506 Rueil Malmaison, France
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;
K. Sztràkos
K. Sztràkos
3
IPEDEX
366 av. Napoléon Bonaparte, BP 205, 92502 Rueil Malmaison, France
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Published:
January 01, 2004

Abstract

During Eocene-Oligocene times, the Grès d'Annot turbidite system (French Alps) was deposited in several tectonically controlled sub-basins, which were mainly fed from a southern major sediment source: the Corsica-Sardinia Massif. In order to establish regional correlations in the southern part of the basin, four kilometre-scale outcrop areas were studied in detail. From south to north these are: the St Antonin, Annot, Grand Coyer and Chalufy areas. The results are: (1) an updated chronostratigraphic framework, (2) a major SE-NW correlation panel, approximately 400m thick and 50 km long, parallel to palaeocurrent directions, within which all stratigraphic units are defined in terms of sedimentology and micropalaeontology and (3) some correlation panels at outcrop scale (around 5 km long and several hundred metres thick), within which all stratigraphic units are defined as before, but with the addition of a direct visual control on correlations, which enables the reconstruction of higher resolution geometry. Seven time-equivalent stratigraphic packages have been correlated from upstream to downstream, making use of micropalaeontologic constraints, and their geometric and facies evolution have been reconstructed through times. This evolution may be related to different stages in the basin deformation, induced by the east to west development of the Alpine foreland basin.

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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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