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Characterization of Neogene marls from the Kert Basin (northeast Morocco): suitability for the ceramics industry

Published online by Cambridge University Press:  04 November 2019

Hicham Nasri ,
Ali Azdimousa ,
Kamal El Hammouti ,
Abdelilah El Haddar  and
Meriam El Ouahabi
Hicham Nasri*
Affiliation:
Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed Premier, Oujda, Morocco
Ali Azdimousa
Affiliation:
Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed Premier, Oujda, Morocco
Kamal El Hammouti
Affiliation:
Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed Premier, Oujda, Morocco
Abdelilah El Haddar
Affiliation:
Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed Premier, Oujda, Morocco
Meriam El Ouahabi
Affiliation:
UR Argile, Géochimie et Environnement Sédimentaires (AGEs), Département de Géologie, Université de Liège, Liège, Belgium
*
*Email: h.nasri@ump.ac.ma
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Abstract

The Neogene marls from the lower Kert area (northeast Morocco) were characterized to evaluate their suitability for the ceramics industry. Two cross-sections involving all of the Neogene facies were studied on both banks of the Kert River. Grey and green marls occurring between sandstone and tuffs were characterized by mineralogical (X-ray diffraction) and physicochemical (grain size, Atterberg limits, X-ray fluorescence and specific surface area) analyses. The Neogene clays studied are mainly calcareous silty marls containing 13–20 wt.% calcite. They consist of quartz, calcite, feldspars, dolomite, illite, kaolinite, chlorite and 10–14 Å illite-vermiculite mixed layers. Cristobalite was detected only in the uppermost level of the green marls, and it originates from a volcanic ash of Messinian age. Trace amounts of siderite and rhodochrosite indicate reducing or locally oxidizing conditions during sedimentation or shortly thereafter. The marls have medium to high plasticity, making them optimal for extrusion. Raw Neogene marls are suitable for manufacturing structural clay products. More specific uses, such as hollow products, roofing tiles and masonry bricks, were supported by the geochemical results and grain-size distribution.

Keywords

ceramicsgeochemistryKertmarlMoroccoNeogeneRif
Type
Article
Information
Clay Minerals , Volume 54 , Issue 4 , December 2019 , pp. 379 - 392
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2019

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Footnotes

Associate Editor: João Labrincha

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