Répartition des dépôts carbonatés du Lias inférieur et moyen le long de la côte atlantique du Maroc: conséquences sur la paléogéographie de l'Atlantique naissant

Dresnay, Renaud du

doi:10.1016/0899-5362(88)90083-8

Cited by 27 publications

(17 citation statements)

References 20 publications

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“…Towards the east (Ameskroud) the age of the Tizgui Fm. changes gradually to Domerian to Middle Toarcian, based on correlations with equivalent series at the Jebel Amsittène Anticline in the southern Essaouira Basin (Bouaouda, 1987;Du Dresnay, 1988;Duffaud et al, 1966).…”

Section: Early To Late Jurassicmentioning

confidence: 99%

Quantitative Meso-/Cenozoic development of the eastern Central Atlantic continental shelf, western High Atlas, Morocco

Zühlke

Bouaouda

Ouajhain

et al. 2004

Marine and Petroleum Geology

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Section: Early To Late Jurassicmentioning

confidence: 99%

Quantitative Meso-/Cenozoic development of the eastern Central Atlantic continental shelf, western High Atlas, Morocco

Zühlke

Bouaouda

Ouajhain

et al. 2004

Marine and Petroleum Geology

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“…3) (e.g. Roch, 1930;Ambroggi, 1963;Duffaud, 1960;Adams, 1979;Adams et al, 1980;Peybernes et al, 1987;Du Dresnay, 1988;Bouaouda, 2007). This approach has been retained in this paper due to a lack of precise dating for most of the synrift and early post-rift formations.…”

Section: Lithostratigraphymentioning

confidence: 99%

Early post-rift depositional systems of the Central Atlantic: Lower and Middle Jurassic of the Essaouira-Agadir Basin, Morocco

Duval-Arnould

Schröder

Charton

et al. 2021

Journal of African Earth Sciences

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Passive margins are traditionally regarded as tectonically quiescent, however the increasing recognition of significant post-rift tectonic uplift along their flanks offers an important control on sediment delivery. The most extensive record of the early post-rift succession of the Central Atlantic Margin (CAM) is found in the Lower and Middle Jurassic outcrops of the Essaouira-Agadir Basin (EAB). This important succession is characterised by alternating deposition of marine carbonates and paralic siliciclastics that correlate with periods of tectonic activity along the margin, rejuvenating sediment input to the basin. Field observations, well data and petrographic analysis are integrated into a coherent sedimentological model, correlated across the basin within a sequence stratigraphic framework. Comparison is drawn with equivalent dated units in the Central High Atlas, which allows a constraint on the regional versus local tectonostratigraphic evolution.In the EAB, Upper Sinemurian to Lower Pliensbachian open marine ramp carbonates record an initial transgression. They are only preserved locally in the north of the basin, below a 2 major fluvial erosion surface that is regionally traceable across the basin and incisive into the Pliensbachian CAMP basalts or Triassic sediments. In the Central High Atlas (CHA), the correlative fluvial erosive event has been dated as Toarcian in age. This influx of siliciclastic sediments is interpreted to have been sourced from the Meseta and/or the Anti-Atlas, supporting recent apatite-fission track thermochronology that indicates erosional exhumation at this time.During the Upper Toarcian, a regional carbonate platform, dominated by peritidal deposits, developed across the EAB in response to renewed marine transgression. Facies include oolitic and bioclastic grainstones, crystalline dolomite, stromatolites and dissolution breccias or evaporites. Overlying Middle Jurassic shallow-marine and fluvial siliciclastics encroached from south of the basin (possibly related to a potential source area in the Anti-Atlas), while to the north shallow marine carbonates dominated. These observations evidence the role of tectonic movements of the hinterland during a passive margin phase as a mechanism to trigger forced regressions, compensating the effect of eustasy.

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“…, 2007). Continental rifting began in the Atlas region at that time but aborted, giving birth to ENE–WSW‐oriented Triassic–Jurassic basins (Du Dresnay, 1988; Hafid et al. , 2008).…”

Section: Geodynamic and Geological Settingmentioning

confidence: 99%

From central Atlantic continental rift to Neogene uplift – western Anti‐Atlas (Morocco)

et al. 2010

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To put constraints on the Mesozoic to recent growth of the Anti-Atlas system, we investigated the temperature-time history of rocks by applying extensive low-temperature thermochronological analysis to three Precambrian inliers along the coast and 250 km into the interior. Bedrocks yield old U-Th ⁄ He ages on zircon and apatite (150-50 Ma) and also fission-track ages of 173-121 Ma on apatite. These datasets are interpreted as recording passive margin upward movements from central Atlantic rifting until the Early Cretaceous. A phase of sedimentary burial was evidenced for the Cretaceous-Eocene. The extension of this thin (1.5 km) basin is loosely constrained but can be extended to the western regions of northern Africa. Effects of the existing thermal perturbation of lithospheric origin 100 km below the Atlas show that the 120-60°C isotherms are not much deflected. Large-scale uplift has possibly occurred in the western Anti-Atlas since c. 30 Ma and is associated with a mean denudation rate of 0.08 km Ma )1 .

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Répartition des dépôts carbonatés du Lias inférieur et moyen le long de la côte atlantique du Maroc: conséquences sur la paléogéographie de l'Atlantique naissant

Cited by 27 publications

References 20 publications

Quantitative Meso-/Cenozoic development of the eastern Central Atlantic continental shelf, western High Atlas, Morocco

Quantitative Meso-/Cenozoic development of the eastern Central Atlantic continental shelf, western High Atlas, Morocco

Early post-rift depositional systems of the Central Atlantic: Lower and Middle Jurassic of the Essaouira-Agadir Basin, Morocco

From central Atlantic continental rift to Neogene uplift – western Anti‐Atlas (Morocco)

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