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Comptes Rendus Géoscience
Volume 341, n° 1
pages 78-84 (janvier 2009)
Doi : 10.1016/j.crte.2008.11.001
Received : 19 Mars 2008 ;  accepted : 28 October 2008
Late Cretaceous synsedimentary diapirism of Bazina–Sidi Bou Krime Triassic evaporites (northern Tunisia): Geodynamic implications
Diapirisme du Crétacé tardif des évaporites triassiques de Bazina–Sidi Bou krime (Tunisie nord-orientale) : implications géodynamiques
 

Fahmi Ben Mehrez a, ⁎ , Jamel Kacem b, Mahmoud Dlala a
a Département de géologie, faculté des sciences de Tunis, université de Tunis EL Manar, campus universitaire, 1060 Tunis, Tunisia 
b Département de géologie, faculté des sciences de Bizerte,université-7-Novembre, 7021 Zarzouna, Bizerte, Tunisia 

Corresponding author.
Abstract

The structural and sedimentary analyses of the surrounding area of the Bazina–Sidi Bou Krime Triassic outcrops (Hedil country, northern Tunisia) show that the geodynamic evolution of this sector has been mainly guided by the diapiric movement of this evaporitic mass in association with synsedimentary extensive tectonics. These results allowed us to imply a new interpretation which excludes the presence of the “Kasseb unit” in the Hedil country (northern Tunisia).

Résumé

Les observations structurales et sédimentologiques faites dans les environs immédiats de Bazina et Sidi Bou Krime (Pays de Hédil, Tunisie septentrionale) montrent que l’évolution géodynamique fini-crétacée de ce secteur est guidée par le mouvement diapirique des évaporites triasiques, en association avec une tectonique distensive synsédimentaire. Ces résultats conduisent à proposer une nouvelle interprétation et remettent en cause l’existence de « l’unité de Kasseb » dans le pays de Hédil en Tunisie nord-orientale.


Keywords : Northern Tunisia, Bazina–Sidi Bou Krim, Geodynamic evolution, Campanian-Maastrichtian, Thrust sheet, Diapiric movement

Mots clés : Tunisie septentrionale, Bazina–Sidi Bou Krime, Évolution géodynamique, Campanien–Maastrichtien, Nappe de charriage, Mouvements diapiriques


OutlineMasquer le plan
Introduction
Lithostratigraphical and sedimentological data  (+)
Tectonic data
Interpretation and conclusion


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