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1 2024

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Exploring the economic significance and diverse hues of quartz: A case study at Adaila, south of El Ma Labiod, NE Algeria

Nacer Wassila, Defaflia Nabil, Taib Hassan, Rehebi Rofaida

Geomatics, Landmanagement and Landscape

2024

no. 1

117--133

The Tebessa region in Algeria is rich in mineralogical resources within its Quaternary deposits, particularly in quartz. This study adopts a multidisciplinary approach including stratigraphic, sedimentological, and granulometric analyses, focusing specifically on the deposits located in the fluvial terraces of the Oued Adaila, south of Tébessa in eastern Algeria. The analysis of granulometric parameters gave valuable insights into the uniformity of the energy levels exerted by the transport agents. Pioneering exoscopy techniques have proved indispensable in discerning the sedimentary history of quartz, offering comprehensive insights into its weathering processes and its intricate journey through continental aquatic pathways. Additionally, this methodology has elucidated the genesis of unique colourations observed in quartz grains. Using Scanning Electron Microscopy (SEM), we have examined the surfaces of quartz grains, revealing an array of patterns attributable either to the inherent crystal lattice structure of quartz or to the erosive influences of the changing environment. These environmental modifications stand out as the primary contributors to the diverse spectrum of colours manifested in the quartz grains. Furthermore, the examination of magnetic data has highlighted the pivotal role played by various oxides present in the Quaternary deposits. These oxides proved to be important sources of ferric elements, crucial in imparting the distinct colorations observed in quartz. This comprehensive study significantly advances our understanding of the mineralogical constitution, sedimentary evolution, and the environmental dynamics shaping the Quaternary deposits in the Tebessa region.