Tectonique synsedimentaire du Moyen-Atlas septentrional au Sud de Taza (Maroc)

Robillard, Didier de

doi:10.2113/gssgfbull.s7-xxi.4.441

Cited by 14 publications

(6 citation statements)

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“…It is an old fault, which was active during the Liassic Atlas tiffing and inherited from Variscan N E -S W structures (Laville & Piqu6 1991). This fault shows a sinistral transpressional activity during the pre-Miocene structuring of the Middle Atlas (Robillard 1978(Robillard , 1979Charri~re 1990). It was also active up to the Plio-Quaternary, as it deforms and tilts the Pliocene and Villafranchian formations (Martin 1981) and determines and deforms the volcanic Quaternary lava flows (Thomas & Fedan 1988), as also shown by palaeomagnetic studies (El Azzab & E1 Wartiti 1988).…”

Section: The N O R T H -M I D D L E Atlas F a U L T Zonementioning

confidence: 95%

Tectonic wedge escape in the southwestern front of the Rif Cordillera (Morocco)

Chaloüan

Galindo-Zaldı́var

Akil

et al. 2006

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The Rif Cordillera is a part of the Alpine orogenic arc in the Western Mediterranean, which was developed by the interaction of the westward motion of the Alboran Domain between the converging Eurasian and African plates. The Prerif Ridges, located along the southwestern front of the Rif, are south-vergent folds that are in places associated with faults affecting Jurassic to Quaternary sedimentary rocks and slope breccias that evidence the deformations that were active over the Neogene-Quaternary period. The different southward or southwestward displacement of each Prerif Ridge is related to the development of frontal and lateral ramps, which may or may not reach the surface. Oblique shortening may be explained by southwestward escape of large tectonic wedges, bounded by large strike-slip faults: the North-Middle Atlas fault which extends northward into the Alboran Sea, the Fez-Tissa-Ta/neste fault, the Bou Draa-Sidi Fili fault, the Jebha fault and the Fables fault. The relative displacement of these tectonic wedges toward the SW may explain the NNE-SSW to ENE-WSW compression observed in the Rif front and in the northern part of its Meseta-Atlas foreland.The Betic-Rif Cordilleras developed in the Western Mediterranean as a consequence of the relative motion of the African and Eurasian plates, with a recent NW-SE convergence of 4 mm a -1

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Section: The N O R T H -M I D D L E Atlas F a U L T Zonementioning

confidence: 95%

Tectonic wedge escape in the southwestern front of the Rif Cordillera (Morocco)

Chaloüan

Galindo-Zaldı́var

Akil

et al. 2006

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“…Les séries sédimentaires paléozoïques et méso-cénozoïques, affleurant dans la zone d'étude, correspondent successivement aux formations suivantes : -les formations cambro-ordoviciennes et ordoviciennes inférieur (Arénigien-Llanvirnien), constituées essentiellement d'un faciès schisteux violacé (lie de vin) ou gris-vert (Hoepffner, 1987 ;Rauscher et al, 1982), comprenant des argilites schisteuses à minces lits de grés micacés, des grésopélites à dominance de pélites et de silts, et des grès grauwackeux. Ces dépôts sont interprétés comme une méga-séquence strato et granocroissante de type plateforme subsidente (Ajamay, 2010) ; -ces formations schisteuses sont surmontées en discordance par des faciès triasiques comprenant deux séries d'argilites rouges séparées par un complexe basaltique doléritique (Manspeizer et al, 1978 ;Robillard, 1978Robillard, , 1979Robillard, , 1981Benchekroun, 1985) ; -les dépôts liasiques formés successivement de dolomies bréchiformes, fines et grises à structures du type Birdeyes d'âge Lotharingien, des calcaires divers à faciès de plateforme peu profonde qui marque le début du Carixien (Robillard, 1981) et des calcaires oolitiques en gros bancs d'âge Domérien (Vidal J. et C. Hoepffner, 1979 ;Robillard, 1978) ; -les dépôts miocènes discordants, constitués de grés et des marnocalcaires à caractère transgressif (Cirac, 1985), recouverts par une formation fluvio-lacustre d'âge Pliocène supérieur où se côtoient sables, calcaires et calcilutites (Dridri et Les mesures microtectoniques de la déformation cassante effectuées au sein des couches d'âge paléozoïque, liasique, et quaternaire, ainsi que les levés cartographique ( Fig. 3) et les coupes structurales ; nous ont permis de décrire un système tectonique en pallier-rampe sur chevauchements N80 à N50 (Fig.…”

Section: Aperçus Stratigraphique Et Lithologique De La Zone D'étudeunclassified

Mise À Jour De La Cartographie Géologique Et États Des Contraintes Tectoniques Dans La Zone De Bouchfâa (NW Du Massif De Tazekka, Maroc)

Gharmane

Fartati

Amrani

et al. 2018

ESJ

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The tectonic and microtectonic analysis of the Paleozoic and MesoCenozoic series of the Bouchfâa zone (NW of Tazekka) enabled us to highlight tectonic palaeo-stress of essentially compressive stresses. These played a key role in the uprising of the Tazekka Massif. The age and chronology of these paleo-stress are established by analogy with the results obtained in the Middle Atlas, Saïs and High Moulouya. The N165 major compressive phase of post-Bathonian and ante-Barremianage, responsible for the thrust of Lower Lias deposits with those of Middle Lias. The second major compressive episode is oriented N120 in the Vallesian and N140 in the lower Pliocene. These last two tectonic events are responsible for the formation of a ramp-flat system and strik-slep thrust oriented N20 to N70. They affect the paleozoic base of the Tazekka massif and its cover.

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“…1: Location of the study area Sci., 8 (3): 83-96, 2015 in the middle and clay-salt on the top. The limestone and dolomite of Lias are widely present in the watershed, where a karstic network was developed (Robillard, 1978). The Miocene deposits of the South Rifain Sillon are organized in two sedimentary units (Cirac, 1985).…”

Section: Geologic Settingmentioning

confidence: 99%

Overview of Flood Risk Assessment of the Taza River Basin, Morocco

Zemzami¹,

Abbou²,

Bouaamlat³

2015

Asian J. of Earth Sciences

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The water resources of the Taza region are diverse and consist of important surface water and groundwater resources. The area is part of the most important groundwater reserves of Morocco. Recently, the region was prone to many flood events where remarkable fluctuations of rainfall and extreme climatic events have been observed. However, there is a lack of studies that cover the different hydrologic aspects of the area and especially, the extreme hydrologic events of the Taza River watershed in which the Taza city is located. To cover this lack, the current study presents an overview of the watershed, including geology, climatology, hydrogeology, geomorphology and especially hydrology. The study focused on the determination of the extreme hydrologic events related to extreme rainfall and streamflow to present basic data sets for further studies. Despite the data scarcity, complexity and the intricate river drainage network of the region, we were able to represent the main hydrologic aspect of the watershed and understand and predicting the system behavior. It was found that the area can be prone to flood risk because of the high flow rates that were calculated using meteorological and hydrological models. In addition, it was found that the basin land use affects directly the hydrodynamic of the river and thus, influence the flood magnitude. The study provides valuable information for understanding the watershed hydrology with a detail never presented before for the study area, where researchers and decision makers can benefit from the outcomes of the study and carry out further assessing the resilience of the watershed to anthropogenic pressure and climate change.

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Tectonique synsedimentaire du Moyen-Atlas septentrional au Sud de Taza (Maroc)

Cited by 14 publications

References 0 publications

Tectonic wedge escape in the southwestern front of the Rif Cordillera (Morocco)

Tectonic wedge escape in the southwestern front of the Rif Cordillera (Morocco)

Mise À Jour De La Cartographie Géologique Et États Des Contraintes Tectoniques Dans La Zone De Bouchfâa (NW Du Massif De Tazekka, Maroc)

Overview of Flood Risk Assessment of the Taza River Basin, Morocco

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