Relationship between geo-structural evolution and development of karstic systems in the culminating area of Ouarsenis (West Algeria)

Autor: Hamimed Abderahmane, Frédéric Donzé, Mouassa Souad, Moussa Kacem, Refas Soraya, Khaldi Abdelkader, Azzaz Habib, Zaagane Mansour, Safa Aissa, Sebbane Abbes
Přispěvatelé: Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), GéoMécanique, Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Sibille, Luc
Rok vydání: 2016
Předmět:
010506 paleontology
Population
010502 geochemistry & geophysics
01 natural sciences
Paleontology
[SPI.GCIV.GEOTECH] Engineering Sciences [physics]/Civil Engineering/Géotechnique
[SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques
education
[SPI.GCIV.RISQ] Engineering Sciences [physics]/Civil Engineering/Risques
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
General Environmental Science
education.field_of_study
geography
geography.geographical_feature_category
[SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique
Fold (geology)
[SPI.GCIV.CH]Engineering Sciences [physics]/Civil Engineering/Construction hydraulique
Karst
Structural evolution
Extensional definition
Tectonics
Sinistral and dextral
General Earth and Planetary Sciences
[SPI.GCIV.CH] Engineering Sciences [physics]/Civil Engineering/Construction hydraulique
Cenozoic
Geology
Zdroj: Arabian Journal of Geosciences
Arabian Journal of Geosciences, Springer, 2016, 9 (14)
ISSN: 1866-7538
1866-7511
DOI: 10.1007/s12517-016-2662-9
Popis: The Ouarsenis area is one of the most developed karstic systems of Algeria. It is a karst reservoir drinking water with a population of more than 50,000 people taking fully benefit from it. To understand the development of this karstic system, the local tectonic history of the four main mountain ranges of this culminating area (Ouarsenis) has been analyzed. Although previously identified primarily Cenozoic tectonic activities have been observed, a set of NW-SE joints intersecting the Jurassic limestone has been associated to a post-nappes tectonic events. Moreover, numerous joint sets oriented NNE/SSW have been identified almost over the entire culminating area. These joints are the direct consequence of the following stress history: (i) a NW/SE shortening responsible for a major overlap and the first fold (P1) phase, (ii) a second NNE/SSW shortening stage responsible for the second folding (P2) phase associated with 70° N sinistral strike-slip trend, (iii) a WNW/ESE extension phase resulting from the change of σ 3 stress vertical axis, and (iv) a shearing stress creating a 120° N sinistral strike-slip fault. Only the late phases are responsible of the development of joints, which have been karstified later on. Indeed, significant families of karstified joints, i.e., 20° and 70° N have been found. These joints are related to the extensional and shearing modes, respectively, and linked to a particular in situ karstogenesis. Moreover, this study suggests an ancient establishment of the karstic systems in the Ouarsenis region in at least two stages: pre-figured and activated behaviors during the Cenozoic.
Databáze: OpenAIRE
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