Etude du remplissage sédimentaire d’un système hypersalin de la Tunisie orientale au cours du Quaternaire récent : la sebkha de Moknine
Abstracts
Results from a detailed sedimentological study of sediments from Moknine sebkha indicate two different deposit episodes. The first is characterized by an abundance of mud and organic matter which is good preserved in clay level. The second episode is qualified by the progradation of clay and organic matter to the centre. This evolution is controlled by two important factors such as dissymmetry of basin topography and the abundance of rivers on the West.
In the past, the sebkha is widened than actual. The abundance of clay in the base of the sequence at the periphery and in intermediate zone gives evidence. Clay level is rich on smectite which is more deposit in the center of the sebkha and contains high quantity of organic matter. Organic matter fraction is dominated by autochthonous material indicated by high values of hydrogen index and n-alkanes centred on nC18 and nC22.
Index terms
Keywords :
conditions réductrices, dynamique sédimentaire, MO allochtone, MO autochtone, sebkha, sédiments récentsKeywords:
autochthonous OM, dynamic of sediment, halophyl biomass, recent sediments, reducing conditions, sebkhaReferences
Bibliographical reference
Raja Chairi, “Etude du remplissage sédimentaire d’un système hypersalin de la Tunisie orientale au cours du Quaternaire récent : la sebkha de Moknine”, Quaternaire, vol. 16/2 | 2005, 107-117.
Electronic reference
Raja Chairi, “Etude du remplissage sédimentaire d’un système hypersalin de la Tunisie orientale au cours du Quaternaire récent : la sebkha de Moknine”, Quaternaire [Online], vol. 16/2 | 2005, Online since 01 June 2008, connection on 28 March 2024. URL: http://journals.openedition.org/quaternaire/328; DOI: https://doi.org/10.4000/quaternaire.328
Top of pageCopyright
The text and other elements (illustrations, imported files) are “All rights reserved”, unless otherwise stated.
Top of page