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Identification of alteration zones using remote sensing lineaments; Optic and radar images in the case of the departments of Abtouyour and Guéra (central massif of Chad)
1 Department of Geomatics, Faculty of Mines and Geology, Polytechnic University of Mongo (Chad).
2 Department of Geosciences, Faculty of Exact and Applied Sciences, University of Ndjamena (Chad).
3 Laboratory of Mechanics Energy and Engineering, Higher National Polytechnic School, Marien NGOUABI University (CONGO).
Review
International Journal of Science and Research Archive, 2024, 12(02), 1890–1901.
Article DOI: 10.30574/ijsra.2024.12.2.1457
Publication history:
Received on 29 June 2024; revised on 06 August 2024; accepted on 09 August 2024
Abstract:
This work concerns the extraction of lineaments likely to control mineralization from OLI 2 (Landsat 9) and Palsar satellite images. The lineaments were first extracted from OLI2 images. Principal component analyses, directional filters (ENVI 5.3 software) and the Line tool (Geomatica PCI) were used to generate the lineaments. Structural information was then extracted using Palsar radar images. Directional filters and the Line tool were used to produce the lineaments of the area. Directional rosettes were produced using Rockwork software. One thousand five hundred and five (1505) lineaments extracted from Palsar images, the longest of which has a length of 10,514 m with a total length of lineaments of 371,938.05 while eight hundred and thirty-five (835) lineaments are extracted from Landsat images, with a maximum lineament length of 20,970 m and a total length of 583,615.26 m. The major directions of the lineaments are N150, N00, N30 and N165. These major directions coincide with the major directions of the old works in the study area. The validation of the results obtained was carried out using geophysical data from the area and these data confirm the effectiveness of the results.
Keywords:
Lineaments; Satellite images; Guéra; Geophysical data
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Copyright © 2024 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
