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Comptes Rendus Géoscience
Volume 338, n° 10
pages 742-749 (août 2006)
Doi : 10.1016/j.crte.2006.05.003
Received : 18 July 2005 ;  accepted : 3 May 2006
Caractérisation géométrique et cinématique des structures liées aux phases compressives de lʼÉocène au Quaternaire inférieur en Tunisie : exemple de la Tunisie nord-orientale
Geometric and kinematics characterization of the structures related to the compressive phases during Eocene to Early Quaternary in Tunisia: example of northeastern Tunisia
 

Houcem Mzali , Hédi Zouari
Laboratoire de géoressources, Centre de recherches et technologies des eaux, BP 273, 8020 Soliman, Tunisie 

Auteur correspondant.
Résumé

De lʼÉocène au Quaternaire inférieur, trois phases tectoniques compressives sont reconnues en Tunisie nord-orientale : la première, contemporaine de lʼÉocène supérieur, est caractérisée par une direction de raccourcissement NW-SE à nord-sud, induisant la genèse des plis NE-SW et le jeu des failles est-ouest à N120 et NE-SW selon une composante inverse. La deuxième phase, exprimée au cours du Miocène supérieur, est caractérisée par une contrainte  , orientée N120 à N140. Elle a induit le rejeu des failles est-ouest à N120 selon une composante normale, et la formation de plis NE-SW. La troisième phase, datée du Plio-Quaternaire inférieur, dont la direction de la contrainte   est NW-SE à nord-sud, est responsable de lʼactivation des failles est-ouest à N120, en décrochement dextre inverse, et des failles NE-SW à composante inverse, et de la genèse des plis NE-SW. Pour citer cet article : H. Mzali, H. Zouari, C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.
Abstract

During Eocene to Early Quaternary period, three compressive tectonic phases are recognized in Northeast Tunisia: a NW-SE to north-south phase during the Late Eocene, a N120-to-N140 phase in the Late Miocene, and a NW-SE to north-south phase in the Plio-Early Quaternary. The first Eocene phase has built NE-SW folds and remobilised east-west-to-N120 and NE-SW faults with a reverse component. The second Miocene phase is characterized by east-west-to-N120 faults with a normal component and NE-SW folds. The third phase occurred during the Plio-Early Quaternary has edified NE-SW folds associated with east-west-to-N120 dextral reverse strike-slip faults and NE-SW faults with a reverse component. To cite this article: H. Mzali, H. Zouari, C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.

Mots-clés : Tunisie, Structures compressives, Éocène, Miocène, Plio-Quaternaire inférieur, Tectonique

Keywords : Tunisia, Compressive structures, Eocene, Miocene, Plio-Early Quaternary, Tectonics




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