Article (Scientific journals)
Contribution to the sedimentology of the Messinian carbonates of the Chelif Basin (Boukadir, Algeria)
Moulana, Meriem Lina; Hubert, Aurelia; Guendouz, Mostefa et al.
2021In Geologica Belgica, 24 (1-2), p. 85-104
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Keywords :
Carbonates; Ramp; Miocene; Ouarsenis; Mediterranean; Microsparitic; Microfacies; Aggradation
Abstract :
[en] The Messinian (Upper Miocene) is characterized at the level of its marginal basins by the development of numerous carbonate platforms. This study concerns the Messinian platform of the Boukadir region in the south of the Chelif Basin in Algeria. It is composed of a lower prograding rimmed platform and an upper aggradational homoclinal ramp resting upon the Tortonian-Lower Messinian Blue Marl Formation, and its thickness reaches ~280 m in the Chelif Basin. The upper red-algae unit is uniform and subhorizontal with a minimum thickness of 90 m. Petrographic analysis of the upper ramp reveals three different microfacies, characterized by Lithothamnium, foraminifera, high porosity and a microsparitic matrix. MF1 is a packstone, MF2 a packstone/bindstone deposited above the fair weather wave base and MF3 is a wackestone to packstone deposited below this level. The upper unit is made up entirely of autochthonous biogenic elements without significant external fluvial contribution. It was formed in a shallow marine environment, with very high productivity and a significant export of the sediments produced. This aggradation was followed by a rapid exhumation (regression) transforming all the aragonite into calcite. The platforms correspond to the T2 complex reef formation (6.7-5.95 Ma) documented on the other Messinian carbonate platforms in the South of the Alboran Sea (Cornée et al, 2004) that formed just before the Messinian Salinity Crisis.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Moulana, Meriem Lina  ;  Université de Liège - ULiège > SPHERES
Hubert, Aurelia  ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Guendouz, Mostefa;  Université des sciences et de la technologie HOUARI BOUMEDIENNE > Géographie et Aménagement du territoire
El Ouahabi, Meriam  ;  Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Boutaleb, Abdelhak;  Université des sciences et de la technologie d'Alger > Metallogeny and magmatism laboratory of Algeria (LMMA) -ATRST. FSTGAT- USTHB
Boulvain, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Pétrologie sédimentaire
Language :
English
Title :
Contribution to the sedimentology of the Messinian carbonates of the Chelif Basin (Boukadir, Algeria)
Publication date :
26 May 2021
Journal title :
Geologica Belgica
ISSN :
1374-8505
eISSN :
2034-1954
Publisher :
Geologica Belgica, Liège, Belgium
Volume :
24
Issue :
1-2
Pages :
85-104
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 July 2021

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