
Mohamed najib ZaghloulAbdelmalek Essaâdi University | UAE · Department of Earth Sciences-FST Tangier
Mohamed najib Zaghloul
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88
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Introduction
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September 1996 - October 2020
Publications
Publications (88)
Remote sensing has become more and more a reliable tool for mapping land cover and monitoring cropland. Much of the work done in this field uses optical remote sensing data. In Morocco, active remote sensing data remain under-exploited despite their importance in monitoring spatial and temporal dynamics of land cover and crops even during cloudy we...
Sea straits are elongate zones where geographic constriction can amplify marine currents. Sediment deposits that formed in sea straits are relatively well studied in the rock record and more recently, models of tidal strait depositional systems have been developed. However, models and descriptions of strait-adjacent systems remain uncommon and are...
During the Tertiary evolution of the Western Mediterranean subduction system, a migrating foreland basin system developed between the Maghrebian orogenic belt and the adjacent African Craton. However, a comprehensive reconstruction of the foreland basin systems of the Rif Chain is still missing. By integrating field observations with quantitative b...
We present new field evidence, geochemical and isotopic data, and age constraints on Lower Jurassic mafic rock suites within a 1200-km-long curvilinear belt in the Rif orogenic belt in northern Morocco and show that these rock assemblages formed as part of the Central Atlantic Magmatic Province (CAMP). The CAMP represents a large igneous province t...
The variety of temporal and structural constraints on the Alpine tectonometamorphic signature of the metamorphic core of the Betic‐Rif orogen (Alboran Domain) has supported a long‐lasting debate regarding the Alpine tectonic and geodynamic evolution of the Western Mediterranean region. Uncertainty still exists on the timing and tectonic significanc...
Sea strait geographies amplify tidal currents, which can result in the formation of tidal strait deposits with a symmetrical facies arrangement. It can be problematic to distinguish such confined tidal strait deposits from strait systems that developed in less constricted settings. To push a more robust differentiation between the confined tidal st...
The Numidian Sandstones are widespread throughout the western Mediterranean, from Spain and North Africa to southern Italy. They consist of intercalations of thick ultra-mature sandstones within brownish shale deposits. Crucial issues about the Numidian Sandstones are still under debate, such as their pertinence to an undisputed paleogeographic dom...
The structural and thermal relaxation overprint associated with the Neogene Alboran rifting have obscured the early Alpine tectono‐metamorphic evolution of the Alboran Domain, representing the metamorphic core of the Betic‐Rif orogen of the western Mediterranean region. This study focuses on the Beni Mzala unit, forming the lower and deeper structu...
The Rifian Corridor was an ancient sea strait that connected the Mediterranean Sea with the Atlantic Ocean during the Miocene. Key outcrop exposures of this corridor's sedimentary fill are exposed at the Ben Allou, El Adergha, and Driouate localities, in the Fez–Meknes region, Morocco. These display cyclic successions that formed immediately before...
During the Neogene, the Western Mediterranean subduction‐related orogen developed under differing modes and senses of subduction, resulting in the formation of the Apennines, Maghrebides, Rif, and Betics. In this work, we present the Neogene kinematic evolution of the Rif, based on literature data and new results from structural‐stratigraphic analy...
Key Points
Opening of the Maghrebian Tethys during a major Middle Jurassic rifting phase
Late Triassic to Early Jurassic CAMP‐related magmatism
Non‐oceanic nature of the Mesorif Gabbroic Complex and absence of an overlaying oceanic sequence
The Rif Mountain located in Northern Morocco represents the westernmost extremity of the Peri-Mediterranean Alpine orogenic system. This belt is classically subdivided into: 1) Internal zones (or Internal Rif which is an allochthonous metamorphic domain known worldwide thanks to the presence of large peridotite outcrops); 2) flysch zones (sediments...
Sediments of the Ben Allou Group deposited in the Southern Riffian Corridor during the Late Tortonian are exposed near Sidi Chahed dam, roughly 30 kilometers Northeast of Meknes. They exhibit three sedimentary cycles that each contain facies F1), coarse grained rhythmically bedded calcarenites, F2), laminated grey marls interbedded with planar lami...
The Rif belt (northern Morocco) is a mountain chain located at the junction between the Mediterranean and Central Atlantic Domains. Although the Rif belt underwent important Cenozoic (i.e., Alpine) shortening, remnants of the Mesozoic North African rifted margin are preserved in its external zones. This contribution aims to characterize the Mesozoi...
This study is based on the Jurassic Siliciclastic deposits in order to provide a basis for more interpretative understanding about the composition, the provenance and source area weathering intensity of source rocks. It also comprises incorporated data to unravel source to sink processes, to reconstruct the African margin paleoclimate conditions an...
The Zoumi Basin was generated in a collisional tectonic setting during the Lower-Middle Miocene. The syn-orogenic flysch deposits of the basin have been well investigated by petrographic and geochemical studies to characterize the composition, source to sink routing system, and tectonic setting of the Zoumi flysch. Forty-three sandstone samples and...
This study focuses on the Lower-Middle Miocene syn-orogenic flysch deposits of the Zoumi basin to infer source area paleoclimatic conditions, the intensity of source rocks paleoweathering, and mechanical sorting and recycling effects. The mudrocks are enriched in Al2O3, Fe2O3, CaO, and TiO2 relative to PAAS and depleted in the other mobile major el...
Background
The Atlantic Coast of Morocco is prone to tsunami inundation. Therefore, in this region, earthquake-induced tsunami hazard has been intensively investigated leading to the development of a number of coastal inundation models. However, tsunami vulnerability remains not well understood to the same extent as the hazard. In this study, we us...
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The natural rocks used today as well as in the history for a variety of purposes were a subject of different alteration, weathering and deterioration conditions. These conditions are strictly controlled by environment and nature of rock varieties (marble and stone). This study is a first approach to understand the relation between some geological f...
Moscone South Poster Hall The NE Atlantic (NEA) is prone to tsunami impact of tectonic origin. Previous studies and tsunami catalogs report the occurrence of significant events namely the 1 November 1755 and the 28 February 1969. In the NEA, the most impacted areas are the coastal zone of Portugal, Morocco and the Cadiz Gulf in Spain. In this stu...
This work deals with sedimentological, petrographic, and structural analyses of a middle Miocene late-orogenic sedimentary cycle, denoted Oued Dayr Formation, recognized in the Rifian sector of the Maghrebian Chain (Morocco). The analyzed Formation (75 m thick) starts with 15–20 m of light colored polymict conglomerates, with minor sandstone beds,...
This work deals with sedimentological, petrographic,
and structural analyses of a middle Miocene late-orogenic
sedimentary cycle, denoted Oued Dayr Formation, recognized
in the Rifian sector of the Maghrebian Chain (Morocco). The
analyzed Formation (75 m thick) starts with 15–20 m of light
colored polymict conglomerates, with minor sandstone beds,...
Background
Despite a position along the passive margin of Africa, the Moroccan Atlantic coast is under the influence of the tsunami threat from earthquakes triggered along the Nubia-Eurasia plate boundary. Along Tangier, Asilah, Sale and Mazagao’s coasts, tsunami have been described since historic times. The 1755 Lisbon quake triggered a tsunami th...
Texture and composition of beach (154 samples) and fluvial (26 samples) sands collected between the Amsa and Amter villages (Rif Thrust-Belt, Morocco) are used to characterize the hinterland petrological provinces, their drainage patterns and dispersal pathways. Multivariate analytical techniques were carried out on the textural and compositional d...
The “Dorsale Calcaire” of the El Haouz chain constitutes the frontal part of the Internal Rif Domain. It is mainly made of carbonate lithofacies. At El Mashar cement quarry, the limestone is well exposed and being worked for Tetouan cement manufactory (LAFARGE Cements II). In this study, petrographic and geochemical analysis of fifteen limestone sa...
The Jebha area, located in the Central Rif, is a key sector to understand the orogenic evolution of the Rif chain. Here, the left lateral Jebha-Chrafate transfer fault, allowed, in the Miocene time, the westward migration of the internal thrust front. The structural analysis of the area revealed a complex tectonic history. The Eocene orogenic pulse...
The Jebha area, located in the Central Rif, is a key sector to understand the orogenic evolution of the Rif chain. Here, the left lateral Jebha-Chrafate transfer fault, allowed, in the Miocene time, the westward migration of the internal thrust front. The structural analysis of the area revealed a complex tectonic history. The Eocene orogenic pulse...
The study of marine pollution has become a major necessity and aims to offer solutions for the preservation of the marine environment. Our work attempts to make a contribution to solve this problem. More precisely, we are mainly concerned with a mathematical modeling and a numerical simulation of marine pollution in Tangier Bay which undergoes an a...
Coastal areas in the North of Morocco are at risk of tsunami inundation. Overland tsunami propagation leads to widespread and dramatic changes in coastal morphology due to sediments erosion, transport and deposition processes. Tsunami sediments transport and morphological changes must take into consideration bed-load and suspended load transport of...
This work deals with sedimentologic, petrographic, and structural analyses of a middle Miocene late-orogenic sedimentary cycle, denoted Oued Dayr Fm, recognized in the Rifian sector of the Maghrebian Chain (Morocco) (Zaghloul et al., 2010b).
The Oued Dayr Fm (75 m-thick) starts with 15-20 m of polymict conglomerates, with minor sandstone beds, lyi...
Les travaux entamés dans la région d’Al Hoceima, ont surtout concerné les terrains anté-quaternaires. Par ailleurs, les études faites sur les formations quaternaires du Rif marocain sont peu nombreuses et très limitées. Le présent travail se base sur une étude stratigraphique, sédimentologique et géochimique des formations quaternaires du littoral...
In order to better understand the orogenic evolution of the Rif chain in the Eocene-Miocene interval, we provide new structural and kinematic data for the Jebha area, a key-sector of the Central Rif. Here the thrust sheet superposition occurs along the well-known Jebha-Chrafate lineament, widely considered as a major left-lateral transfer fault tha...
Tsunamis are low frequency but high impact natural disasters. The NE Atlantic coast seems to be among the less tsunami threatened zones. Recent studies show that most destructive tsunamis in the NE Atlantic were generated by earthquakes located in the South West Iberian Margin (SWIM), such as the November, 1st, 1755 Lisbon Earthquake (8,75Mw), whic...
Extreme marine inundations triggered by tsunamis or storms have an undoubtedly important significance for studies on coastal evolution and coastal management. Tsunamis can leave sedimentary imprints on shores far from the event source. The recognition of coastal inundations depends on the identification of the ancient deposits characteristics. The...
Limestone tuff deposits precipitated in fluvial environments are widespread in the northern Morocco and the S Portugal. These deposits represent environmental conditions prone for the carbonate precipitation mainly in areas of Mesozoic limestone substratum with active water seepage from the aquifers. The mesoscopic and microscopic characteristics o...
Cette étude se focalise sur l'évaluation de la vulnérabilité des constructions dans la région d'Assilah (Nord du Maroc). La méthode considérée consiste à combiner à la fois, la modélisation numérique des tsunamis, les outils SIG et des données d'enquête sur le terrain. Comme sources de tsunami, nous considérons ici les scénarios de tremblement de t...
Extreme marine inundations triggered by tsunami or storms have an undoubtedly important significance for studies on coastal evolution and coastal management. Tsunamis can leave sedimentary imprints on
shores far from the event source, the recognition of coastal inundations depends on the identification of characteristic ancient deposits and the str...
Spatial patterns of textural and petrological variabilities of sediments may provide constraints on the geography, climate and lithologies of sediment source areas. An understanding of the textural and petrological characteristics of modern sediments is desirable to develop more refined provenance interpretation schemes, to provide a basis for eval...
Liassic rocks of the External Dorsale Calcaire succession, cropping out in the Northern Rif close to Chefchaouen city, host pre-orogenic structures, such as normal faults, veins and fractures, resulting from extension related to the Jurassic rifting of the Neotethys Domain. The successive inclusion of these rocks in the orogenic wedge, mainly occur...
The tsunami became a global phenomenon that presents several and crucial worries. Recent events; such as 2011 Tohoku and 2004 Sumatra, have caused massive loss of life, destruction of coastal infrastructures and disruption to economical activities; hight lighting the need of to inverstegate tsunami hazard vulnerability and risk. The Atlantic coasts...
This paper provides the structural analysis of the Chefchaouen area in the northern Rif. Here the Dorsale Calcaire superposes, by means of an excellently exposed thrust fault, onto the Predorsalian succession in turn tectonically covering the Massylian Unit. Hanging wall carbonates of the Dorsale Calcaire Unit form a WSW-verging regional fold with...
L’augmentation des risques liés aux catastrophes naturels constitue un phénomène mondial préoccupant, cette augmentation est due essentiellement à l’accroissement de la densité d’occupation et des activités dans des zones à risque (Leone, et al., 2010). La ville de Tanger donne sur les deux côtes atlantique et méditerranéenne et elle est exposée à...
Tsunamis are potentially devastating waves, they can cause complete destruction of coastal buildings and facilities, severe erosion of beaches, and catastrophic loss of life along the impacted coasts. The Atlantic coasts of Western Europe and NW Africa may not be among the most tsunami-threatened places due to the infrequent occurrence of tsunami e...
This paper provides a structural analysis of the Chefchaouen area, in the Northern Rif. Here the Dorsale Calcaire succession tectonically superpose the Predorsalian Unit. Both successions overthrust the Massylian Unit. The carbonates of the Dorsale Calcaire are characterized by pre-orogenic structures, such as normal faults, veins and fractures, re...
Aim of this paper is the structural and stratigraphic analyses of the Ligurian Accretionary Complex exposed in the Campania region (Italy) in order to unraveling the deformation pattern characterizing the transition from the final oceanic subduction stages to the early stages of deformation of the foreland continental margin. Our results outline a...
In questo lavoro è presentata l'analisi strutturale delle successioni bacinali e di piattaforma calcarea affioranti nell'area di Chefchaouen (Rif settentrionale). L'analisi ha permesso la ricostruzione della storia tettonica delle successioni studiate, caratterizzata dalla sovrapposizione di più fasi deformative. Le prime due fasi sono associate al...
This study investigates the morpho-sedimentary evidence of two highstands registered and dated during MIS 5 stage by U-series dating in the North of Morocco (Strait of Gibraltar). Bioerosive notch and mixed siliciclastic and carbonate deposits, high energy beaches with algal bioherms, were formed in coastal environments during MIS 5a. A sea-level a...
The early stages of southern Apennine development have been unraveled by integrating the available stratigraphic record provided by synorogenic strata (of both foredeep and wedge-top basin environments) with new structural data on the Liguride accretionary wedge cropping out in the Cilento area, southern Italy. Our results indicate that the final o...
In the Beni Issef Massif, nearly 30km west of Chefchaouen (Morocco), the thickest post-nappe succession within the Rifian sector of the Maghrebian Chain seals the tectonic contact between the Intrarifian External Tanger and Loukkos Units, related to the Rifian External Domain. This succession is very important for the reconstruction of the deformat...
This work deals with the first evidence in the Rifian Maghrebids of a Miocene clastic succession, named Oued Dayr Fm, uncorformably resting on the Ghomaride Complex. The formation starts with polymictic conglomerates, consisting of clasts coming from all the Rifian Internal Units, sharply or gradationally evolving to graded and stratified calcareou...
The southern side of Gibraltar and the Western Alboran Sea of the northern Rif coasts and rivers provide a natural field laboratory for sampling modern sand at different scales: small catchment basins (first order) and rivers draining mountain belts (second order). The Rifian chain represents a deformed and uplifted thrust-belt and related foreland...
This work deals with new lithostratigraphic, sedimentological, petrographic and geochemical data collected from coastal Quaternary formations of the Tangier Peninsula along the Northern Atlantic and Mediterranean coasts in the southern side of the Gibraltar Strait (Morocco).The sedimentological features of the analyzed sections reflect a palaeoenvi...
The Middle to Upper Triassic redbeds at the base of the Ghomaride and Internal ‘Dorsale Calcaire’ Nappes in the Rifian sector of the Maghrebian Chain have been studied for their sedimentological, petrographic, mineralogical and chemical features. Redbeds lie unconformably on a Variscan low-grade metamorphic basement in a 300 m thick, upward fining...
Compositional and chemical analyses suggest that Middle Triassic-Lower Liassic continental redbeds (in the internal domains of the Betic, Maghrebian, and Apenninic chains) can be considered a regional lithosome marking the Triassic-Jurassic rift-valley stage of Tethyan rifting, which led to the Pangaea breakup and subsequent development of a mosaic...
In the Maghrebian Chain, pelagic and turbiditic successions deposited on the oceanic crust of the Flysch Basin crop out from Gibraltar to Sicily, tectonically juxtaposed between the External and Internal Nappes. In the Rifian Maghrebids, the Mauretanian successions, deposited on the northern side of the basin and supplied by a «Mesomediterranean Mi...
In the Gibraltar Arc, the age of the turbiditic formations capping the Mauretanian successions, deposited in the internal side of the Maghrebian Flysch Basin Domain and testifying to the foredeep stage of the basin occurring immediately before its deformation, has been re-examined using the calcareous nannoplankton. The base of the successions resu...