0000000000407751

AUTHOR

Nadifa Lachkar

showing 4 related works from this author

Early Jurassic normal faulting in a carbonate extensional basin: characterization of tectonically driven platform drowning (High Atlas rift, Morocco).

2009

18 pages; International audience; This paper describes a tectonostratigraphic model of the synrift evolution of the Early Jurassic High Atlas rift of Morocco. The model is constrained by mapping of a set of inverted extensional blocks, by facies analysis of carbonate platform and turbiditic to hemipelagic synrift deposits, and by high-resolution (n 3 100 ka) biostratigraphy of the Early Jurassic succession. The chronostratigraphic packages of the High Atlas of Rich vary significantly in thickness, facies and architecture from one tectonic block to another. Our study shows how synrift strain varied in space and time over a long time interval (14 Ma) around the High Atlas rift. Initially, in …

[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/TectonicsRift010504 meteorology & atmospheric sciencesCarbonate platformAtlas (topology)Geology[ SDU.STU.TE ] Sciences of the Universe [physics]/Earth Sciences/TectonicsBiostratigraphyStructural basin010502 geochemistry & geophysics[ SDU.STU.ST ] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy01 natural sciencesPaleontologychemistry.chemical_compoundTectonicschemistry[SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/StratigraphyFaciesCarbonateGeology0105 earth and related environmental sciences
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Les ammonites du Pliensbachien du jebel Bou Rharraf (Haut Atlas oriental, Maroc).

2011

60 pages; International audience; L'originalité des dépôts sédimentaires et des faunes d'ammonites du jebel Bou Rharraf repose sur la présence de faciès « Ammonitico Rosso », les plus occidentaux connus pour le Pliensbachien, une forte diversité des Phylloceratida (Phylloceras, Calaiceras, Zetoceras, Partschiceras et Juraphyllites) et une disparité morphologique importante chez les Galaticeras, Miltoceras et les Tauromeniceras. Si quelques formes, telles que Miltoceras taguendoufi et Mauretaniaceras elmii nov. gen., nov. sp. ont un cachet endémique très affirmé, les faunes du Pliensbachien du Haut Atlas oriental sont classiques pour la marge sud de la Téthys occidentale. Trois genres (Callo…

010506 paleontologyPaleontologyJurassique inférieur010502 geochemistry & geophysicsPliensbachien01 natural sciencesMarocBiostratigraphieSpace and Planetary ScienceAmmonites[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology0105 earth and related environmental sciences[ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/PaleontologyHaut AtlasPaléobiogéographie
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Les ammonites du Sinémuriensupérieur du Jebel-Bou-Hamid (Haut-Atlas central, Rich, Maroc). Approches paléontologique et biostratigraphique

1998

Resume L'etude des faunes d'ammonites - plus de 25 taxons - et de leur succession biostratigraphique dans unecoupe exceptionnellement complete et fossilifere du Haut-Atlas central de la region de Rich (Maroc) a permis la mise en evidence de 10 unites biochronologiques elementaires (=assemblages) pour une periode debutant au sein de la partie terminale du Sinemurien inferieur et s'achevant avec le Sinemurien superieur. Pour les zones a Oxynotum et Raricostatum, il s'agit des premieres donnees biostratigraphiques collectees avec une telle precision dans le Nord de l'Afrique. Pour le Sinemurien inferieur et la zone a Obtusum, les nombreuses donnees nouvellement acquises, completent, precisent …

GeographybiologySpace and Planetary SciencePaleontologyNorth africaAmmonoideaMesozoicBiostratigraphybiology.organism_classificationHumanitiesTetrabranchiataGeobios
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Modelo de cabalgamiento profundo para el Alto Atlas (Marruecos). Implicaciones sísmicas en la zona de colisión entre Eurasia y Africa

2007

Previous crustal models of the High Atlas suppose the existence of a mid-crustal detachment where all the surface thrusts merged and below which the lower crust was continuous. However, both seismic refraction data and gravity modeling detected a jump in crustal thickness between the High Atlas and the northern plains. Here we show that this rapid and vertical jump in the depth of Moho discontinuity suggests that a thrust fault may penetrate the lower crust and offset the Moho (deep-rooted “thick skinned” model). The distribution of Neogene and Quaternary volcanisms along and at the northern part of the High Atlas lineament can be related to the beginning of a partial continental subduction…

LineamentFault (geology)African PlatesubducciónThrust faultSeismic refractionGeomorphologythick skinned modelgeophysical datageographygeography.geographical_feature_categorySubductionMohoTectónica de placa mediterráneadatos geofísicoslcsh:QE1-996.5GeologyCrustmodelo “thick skinnedâ€�modelo “thick skinned”High Atlaslcsh:GeologyPlate tectonicsMediterranean plate tectonicsAlto Atlas (Marruecos)subductionSeismologyGeology
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