La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Geochemistry of recent marine sediments in the Bardawil lagoon, northern Sinai, Egypt
Auteurs :	A. G. Taher, Auteur
Type de document :	Article
Dans :	Hydrobiologia (457 AUG 1 2001)
Article en page(s) :	5-16
Résumé :	The concentrations of major (Al, Fe, Mg, Ti, K arid Na) and minor (Ba, Sr, V, Cu, Mn, Cr, Ni, Zn, Pb and Mo) elements as well as carbonate, organic carbon and total nitrogen have been determined in surface sediments collected at 12 stations from the Bardawil lagoon. The aim of the study was to characterize the geochemistry of the sediments in three different environments, the lagoon, the salt pails and the inlet between the lagoon arid the Mediterranean Sea. Higher CaCO(3) Percentage (53.5-70.5%) were found in the salt pails where biogenic calcareous components and carbonate rock fragments were found in sufficient quantities in the sediment fractions. Based on high C/N ratios, the organic carbon fraction of the Bardawil lagoon surface sediments is clearly dominated by terrigenous material. The distribution of Al, Fe, Mg and Ti are essentially controlled by the mineralogy of the sediments. The ratios of Ba, Sr, Cu, Mn, Pb and Mo to Al are all high in the salt pails arid reflect changes in mineralogy and sediment texture.

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