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Comptes Rendus Géoscience
Volume 335, n° 8
pages 701-708 (août 2003)
Doi : 10.1016/S1631-0713(03)00115-9
Received : 3 February 2003 ;  accepted : 26 May 2003
Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Muriel  Rocher a * ,  Stéphane  Baize a ,  Stéphane  Jaillet b ,  Edward Marc  Cushing a ,  Yannick  Lozac'h a ,  Francis  Lemeille a
aIRSN, BP 17, 92262 Fontenay-aux-Roses cedex, France 
bUMR CNRS 7566 G2R, université Henri-Poincaré, Nancy-1, BP 239, 54506 Vandoeuvre-lès-Nancy, France 

*Corresponding author.

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with   roughly trending north-south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).


Des échantillons de calcite ont été prélevés dans la matrice de la roche et dans un placage superficiel sur un plan de faille karstifié d'une carrière souterraine de l'Est du Bassin parisien. L'âge de la karstification est quaternaire. L'analyse du maclage de la calcite a révélé que seule la matrice a subi une compression WNW, attribuable à la collision alpine du Mio-Pliocène. Le placage et la matrice ont tous deux subi un état de contraintes décrochant, avec   orienté nord-sud, qui pourrait correspondre à l'état de contraintes régional actuel, compressif décrochant plutôt orienté NNW, modifié par des phénomènes locaux. Pour citer cet article : M. Rocher et al., C. R. Geoscience 335 (2003).

Mots clés  : stresses ; Quaternary ; calcite ; twinning ; karst ; platform ; France.

Mots clés  : contraintes ; Quaternaire ; calcite ; maclage ; karst ; plate-forme ; France.

© 2003  Académie des sciences@@#104156@@

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