Strain Partitioning Controlled by Oblique Ramp in Intracratonic Chains in Tunisia: Example of Gafsa Basin

作     者：Soulef Amamria Mohamed Sadok Bensalem Eric Mercier Mohamed Ghanmi Fouad Zargouni 

作者机构：Department of Sciences and Technique University of Nantes Nantes France Faculty of Sciences of Gabes University of Gabes Erriadh City Tunisia University of Sciences of Tunis University of Tunis El Manar Tunis Tunisia 

出 版 物：《International Journal of Geosciences》 (地球科学国际期刊（英文）)

年 卷 期：2013年第4卷第2期

页      面：408-416页

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：Intracratonic Chains Strain Partitioning Convergence Oblique Shortening 

摘      要：The aim of this contribution is the interpretation of intracratonic chains in African plates, but it is important to verify some parameters such us the oblique convergence between Africaand Europa plates. Particularly In southern central of atlassic Tunisian belts, the slickenside examination of directional preexisting faults of N120 direction shows the coexistence of thrusting and strike-slip faults striation. In the limits of these faults principally in some tectonics lens we distinguish abnormal contacts with Triassic facies. The kinematic evolution of Gafsa basin resumed in the geometry of strike-slip faults connected in the thrusting system, this movement resulted from the oblique convergence on Ben Younes, Bou Ramli and Attig chains during compressive phases. This deformation style requires a shortening axis oblique to the NW-SE accidents (N120). The strain partitioning model verify the geometry of faults and equivalent evolution of folds and confirms the Triassic decollement level but without integrated of basement structures in the deformation. It permeated a passive transport of deformation observed in cover structure.