标题：Caractérisation calcimétrique et sédimentométrique des dépôts argileux du bassin néogène de Boudinar (Rif nord-oriental, Maroc) : implication sur l’évolution eustatique et hydrodynamique du bassin et intérêt économique (Calcimetric and sedimentometric characterization of clay deposits in the Neogene Boudinar basin (North Eastern Rif, Morocco): implication on the eustatic and hydrodynamic evolution of the basin and economic interest),
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：3
页码：859-870
出版社：University of Mohammed Premier Oujda
摘要：The sedimentological study of Messinian and Pliocene clays of Boudinar basin allowed us to determine the calcium carbonate (CaCO 3 ) rate of the analyzed samples through two methods: Titration calcimetry and Bernard calcimeter. Although, the clay, silt and sand proportions have been highlighted in the same samples by sedimentometry. The calcimetry results show a concordance between the two methods. Indeed, they allowed to qualify these clay deposits. Thus, the calcium carbonate rate varies from 9% to 27.5%, furthermore, This variation can be correlated to the sea level fluctuations recorded in the basin during the Messinian and Pliocene [1]. So, the sediment calcimetry is not only an analytical approach to establish the quality of clays in order to highlight their economic interests, but also a way to track environmental and eustatic changes in the sedimentary basins. For its part, the sedimentometry allowed to classify the Messinian and Pliocene deposits of Boudinar Basin. So, according to the Shepard system [2], the Messinian samples are silty clay generally exceeding 60% of clay. Althought, the Pliocene samples correspond to sandy-clayey silt with clay rate varies between 25% and 36%. However, silt rate varies from 35% to 47%. The sands rates vary inversely with clay rates. Indeed, they do not exceed 4% in the Messinian samples while they range from 20% to 27.27% in the Pliocene samples. The Flemming system [3] classifies the Messinian sediment in silty clays. Nevertheless, the Pliocene starts with clayey slightly sandy muds which become silty slightly sandy muds. The series ends with Pliocene silty sandy muds. This approach informed us about hydrodynamic evolution of the deposit environment. The calcimetry results represent a first valuation of clays while the sedimentometry results have more qualified these clay deposits and also provided clarification over eustatic and hydrodynamic evolution of basin.
关键词：clay; calcimetry; sedimentometry; Neogene; Boudinar; North Eastern Rif; Morocco.
