Cretaceous paleomargin tilted blocks geometry in Northern Tunisia: stratigraphic consideration and fault kinematic analysis Chahreddine NAJI

Abstract : New stratigraphic data, lithostratigraphic correlations, and fault kinematic analysis are used to discuss the basin geometry and sedimentation patterns of the northeastern Tunisia during Cretaceous times. Significant facies and thickness variations are deduced along the northeastern Atlas of Tunisia. The NW-SE 80-km-long regional correlation suggests a high sedimentation rate associated with irregular sea floor. The fault kinematic analysis highlights N-S to NE-SW tectonic extension during Early Cretaceous. During Aptian–Albian times, an extensional regime is recognized with NE-SW tectonic extension. The Cenomanian–Turonian fault populations highlight a WNW-ESE to NW-SE extension, and Campanian–Maastrichtian faults illustrate an NW-SE extension. The normal faulting is associated to repetitive local depocenters with a high rate of sedimentation as well as abundant syntectonic conglomeratic horizons, slump folds, and halokinetic structures. The sequence correlation shows repetitive local depocenters characterizing the basin during Early Cretaceous times. All the above arguments are in favor of basin configuration with tilted blocks geometry. This geometry is shaped by major synsedimentary intra-basin listric normal faults, themselves related to the extensional setting of the southern Tethyan paleomargin, which persisted into the Campanian–Maastrichtian times. The results support a predominant relationship between tilted blocks geometry and sedimentation rather than E-W “Tunisian trough” as it was previously accepted.
Type de document :
Article dans une revue
Arabian Journal of Geosciences, Springer, 2018, 11 (19), pp.583. 〈https://link.springer.com/journal/12517〉. 〈10.1007/s12517-018-3930-7〉
Liste complète des métadonnées

Littérature citée [2 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01892586
Contributeur : Catherine Beaussier <>
Soumis le : mercredi 10 octobre 2018 - 16:45:47
Dernière modification le : vendredi 12 octobre 2018 - 01:03:28

Fichier

AJGS-D-18-00565_R2-2.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Chahreddine Naji, Amara Masrouhi, Zayneb Amri, Mohamed Gharbi, Olivier Bellier. Cretaceous paleomargin tilted blocks geometry in Northern Tunisia: stratigraphic consideration and fault kinematic analysis Chahreddine NAJI. Arabian Journal of Geosciences, Springer, 2018, 11 (19), pp.583. 〈https://link.springer.com/journal/12517〉. 〈10.1007/s12517-018-3930-7〉. 〈hal-01892586〉

Partager

Métriques

Consultations de la notice

100

Téléchargements de fichiers

6