1Department of Mining, New and Renewable Energies. National Higher Institute of the Sahara and Sahel, Iriba, Chad
2Department of Mining and Geological Engineering, Faculty of Life and Earth Sciences, Pala University, P.O. Box. 20, Pala, Chad
3Laboratory of Geosciences, Natural Resources and Environment, University of Douala, BP: 44155, Douala, Cameroon
4Department of Geological Engineering, Polytechnic University of Mongo, Chad
Journal of Geosciences and Geomatics.
2024,
Vol. 12 No. 4, 80-86
DOI: 10.12691/jgg-12-4-1
Copyright © 2024 Science and Education PublishingCite this paper: Félix Nenadji Djerossem, Ngarbagne Rirabé, Gustave Ronang Baïssemia, Moussa Ngarena Klamadji, Malik Hisseine Malik. Lineament and Lithological Mapping of Meta-Sediments and Granitoids of Goz-Beïda (Eastern Chad) Based on Semi-Automatic Processing of Landsat 8 Oli/Tirs Images.
Journal of Geosciences and Geomatics. 2024; 12(4):80-86. doi: 10.12691/jgg-12-4-1.
Correspondence to: Félix Nenadji Djerossem, Department of Mining, New and Renewable Energies. National Higher Institute of the Sahara and Sahel, Iriba, Chad. Email:
Djerossem@gmail.comAbstract
Using Lansat-8 OLI/TIR image combined with field and pre-existing data permit us to create lineament and lithological map of Goz-Beïda area. The PCA images were subjected to Sobel directional filters using the semi-automatic extraction method to discriminate lineaments. By combining the 7/5/1 bands in RGB mode, the PCA images (PCA1, PCA2, PCA3) in RGB mode and the ratio bands 7/5, 4/5, 1/7 are used to discriminate the lithological types. The results show that the main lineaments are characterized by NE-SW and NNE-SSW directions. The N-S, ENE-WSW and NW-SE directions correspond to mean directions. Several lithological types are discriminated: two-mica quartzite, metapelite, pyroxene monzonite, biotite granite and two-mica leucogranite. The rocks types are partially covered by alluvial deposits.
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