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1

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

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2024

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no. 1

117--133

EN

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.

2

Blast design and improvement of the quality of fragmentation in the aggregate quarries. Case study: Djebel Bouzegza C01

Bedri Khaoula, Assed Mohamed Aguid Bachar, Taib Hassan, Hadji Riheb, Defaflia Nabil, Filali Mira

Geomatics, Landmanagement and Landscape

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2024

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no. 2

53--65

EN

Fragmentation efficiency is important concerned in mining and quarrying as it effects on the productivity of different mining operations. Various parameters effect on the quality of the fragmentation. However, this research was aimed to study the effect of powder factor, burden and spacing on the blasting fragmentation in the Djebel Bouzegza C01 quarry, Boumerdes, Algeria. For the evaluation of the average size fragment, it had been used the processing image Split Desktop (P50) and compared with the results of the predictive model Kuz Ram (X50). The highest values of X50 (680.00 mm) and P50 (645.45 mm) were recorded when the largest values of (burden × spacing) that were (4.5 m × 4.5 m) and in the smallest value of the powder factor which was 0.20 kg · m–3. The Fragmentation Indicator FI gives the affectedness of the Kuz Ram Model. After plotting the results on 3D surface, it has improved the results of the average size when the burden will be less than 3.70 m and the powder factor will be less than 0.64 kg · m–3 while to minimized the percentile of oversize fragments, it was obtained that the burden will be less than 3.70 mm, otherwise the powder factor was more than 0.30 kg · m–3. Blast design parameters and the powder factor are therefore important variables in improving the results of blast fragmentation.

3

Geomatics-based assessment of the neotectonic landscape evolution along the tebessa-morsott-youkous collapsed basin, Algeria

Taib Hassan, Benabbas Chaouki, Khiari Abdelkader, Hadji Riheb, Haythem Dinar

Geomatics, Landmanagement and Landscape

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2022

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no. 3

131--146

EN

The neo-tectonic research is interested in the study of the movements of Earth’s crust in recent geological times. It could explain the deformation mechanisms that lead to the structuring of drainage catchments. The Morsott-Tebessa-Youkous (Chabro) collapsed basin corresponds to a subsiding depression framed by brittle structures and filled with thick deposits. Our work aims to unveil the neo-tectonic activity and reconstruct the morphometric evolution of the landscape and the drainage network of the basin. For this task, our investigation applies a quantitative analysis of geomorphic indices extracted from the DEM of the study area. We used a GIS-based approach to compile seven morphometric factors namely Integral Hypsometry (HI), the Sinuosity of mountain fronts (Smf), the Valley Floor width to height ratio (VF), the Asymmetry Factor (AF), Basin Shape index (BS), and the topography (T). All these thematic parameters were processed in a Geo-database to calculate the study area’s Relative Tectonic Activity Index (IRAT) as a result. The IRAT map was categorized into three classes. The result highlighted the distribution of relative tectonic activity in the region and unveiled some unknown faults. It associated the sinuosity of rivers and the deformation of the substratum with active tectonic anomalies. This research work succeeded in drawing up a new scheme of the neo-tectonic activity and morphostructural evolution in the collapsed basin.