| Autor: |
Aridhi, Kais, Aridhi, Sabri, Bagga, Mohamed, Abdeljaouad, Saâdi, Zargouni, Fouad, Mercier, Eric |
| Zdroj: |
Arabian Journal of Geosciences; May2013, Vol. 6 Issue 5, p1591-1599, 9p |
| Abstrakt: |
The imbrication's area in northern Tunisia is the most external segment of Alpine range, where several associated folds types with thrust ramps are recognized within imbricate units beneath Numidian front slope. Their presence help to understand thrusting mechanisms installation through studied area. In fact, this zone was considered as a result of Paleogene gravitary slop (; ; ), which is proved to be affected by major deep decollement, given rise to various structures, some are propagation folds, specific of foreland front, limited to this area, and those in more external position: Tunisian Atlas (; ; ; ). Various categories of fold ramps could be identified: frontal folds ramp NE-SW and others as lateral or oblique ramp with NW-SE trend (). The relation between various structures has been used as recognition tools of thrusting sequences and to propose a new deformation chronology. Delimited outcropping of these structures between two both parallel faults strikes with regional displacement, leads to interpret these faults as cogenetic tear faults of propagation thrusts; this fault separates two domains with different deformation styles from each other side. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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