[ Utilisation de l’image multispectrale Landsat 7 et 8 pour l’exploration minière : Cas de la boutonnière de Bou-Azzer-El Graara, Maroc ]
Volume 28, Issue 1, December 2019, Pages 299–315
Abdessamad EL ATILLAH1, Zine El Abidine EL MORJANI2, and Mustapha SOUHASSOU3
1 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
2 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
3 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Remote sensing is an indirect tool for prospecting the Earth's surface. It is very powerful especially in its applications related to the field of geology. This work is part of the use of remote sensing as a tool to direct prospectors to areas that may contain mineral concentrations, saving both time and cost. We will limit ourselves mainly to the study of a Landsat 8 satellite image captured on 22 July 2016 around the Precambrian inlier of Bou-Azzer-El Graara, Anti Atlas Central region in Morocco and another Landsat 7 image. The latter did not give good results considering the problem at the level of the image sensor unlike that of the Landsat 8; the Optimum Index Factor (OIF) calculation makes it possible to detect that the most important colored components are, in the order of priority, 567 (with the OIF = 8830), 467 (with the OIF = 8446), 456 (with OIF = 8387) and 367 (with OIF = 8063); The reports of the bands, rations, and the Principal component analysis PCA, made it possible to carry out a cartography lithological and hydrothermal alteration as well as maps of lineaments by means of the directional filters; the assembly and the interpretation of these information plans allow us to know the zones with mining potential. The validity of the models is tested by comparison with field data and geological maps of the studied site.
Author Keywords: Anti-Atlas, Landsat 7, Landsat 8, Lineament, lithologic mapping, hydrothermal alteration, Mineral Exploration.
Volume 28, Issue 1, December 2019, Pages 299–315
Abdessamad EL ATILLAH1, Zine El Abidine EL MORJANI2, and Mustapha SOUHASSOU3
1 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
2 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
3 EGERNE, Faculté Polydisciplinaire de Taroudant, Hay Mohammadi, BP : 271 – C.P : 83000, Taroudant, Morocco
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Remote sensing is an indirect tool for prospecting the Earth's surface. It is very powerful especially in its applications related to the field of geology. This work is part of the use of remote sensing as a tool to direct prospectors to areas that may contain mineral concentrations, saving both time and cost. We will limit ourselves mainly to the study of a Landsat 8 satellite image captured on 22 July 2016 around the Precambrian inlier of Bou-Azzer-El Graara, Anti Atlas Central region in Morocco and another Landsat 7 image. The latter did not give good results considering the problem at the level of the image sensor unlike that of the Landsat 8; the Optimum Index Factor (OIF) calculation makes it possible to detect that the most important colored components are, in the order of priority, 567 (with the OIF = 8830), 467 (with the OIF = 8446), 456 (with OIF = 8387) and 367 (with OIF = 8063); The reports of the bands, rations, and the Principal component analysis PCA, made it possible to carry out a cartography lithological and hydrothermal alteration as well as maps of lineaments by means of the directional filters; the assembly and the interpretation of these information plans allow us to know the zones with mining potential. The validity of the models is tested by comparison with field data and geological maps of the studied site.
Author Keywords: Anti-Atlas, Landsat 7, Landsat 8, Lineament, lithologic mapping, hydrothermal alteration, Mineral Exploration.
Abstract: (french)
La télédétection spatiale est un outil indirect de prospection de la surface terrestre. Elle est très performante surtout dans ses applications liées au domaine de la géologie. Ce travail s’inscrit dans le cadre de l’utilisation de la télédétection comme outil visant à orienter les prospecteurs vers des zones susceptibles de renfermer des concentrations des minéraux, en économisant à la fois du temps et du coût. Nous allons limiter principalement à l’étude d’une image satellitaire Landsat 8 captée le 22 juillet 2016 autour de la boutonnière précambrienne de Bou-Azzer-El Graara, région de l’Anti Atlas Central au Maroc et une autre image du Landsat 7. Ce dernier n’a pas donné des bons résultats vu le problème au niveau du capteur d’image au contraire de celle du Landsat 8 ; le calcul d’Optimum Index Factor (OIF) permet de déceler que les composantes colorées les plus importantes sont, dans l’ordre de priorités, 567 (avec l’OIF= 8830), 467 (avec l’OIF=8446), 456 (avec l’OIF=8387) et 367 (avec l’OIF=8063) ; Les rapports des bandes, rations, et l’analyse en composante principale ACP, ont permis la réalisation d’une cartographie lithologique et d’altération hydrothermale ainsi que des cartes de linéaments par le biais des filtres directionnels ; l’assemblage et l’interprétation de ces plans d’information nous permettent de connaitre les zones à potentiel minier. La validité des modèles est testée par comparaison avec les données de terrain et les cartes géologiques du site étudié.
Author Keywords: Anti-Atlas, Landsat 7, Landsat 8, Linéament, cartographie lithologique, altération hydrothermale, Exploration minière.
How to Cite this Article
Abdessamad EL ATILLAH, Zine El Abidine EL MORJANI, and Mustapha SOUHASSOU, “Use of Landsat 7 and 8 Multispectral Image for Mineral Exploration : Case of Bou-Azzer-El Graara inlier, Morocco,” International Journal of Innovation and Applied Studies, vol. 28, no. 1, pp. 299–315, December 2019.
