Takodjou Wambo, J.D., Ganno S., Afahnwie, N.A., Nomo, N.E., Mvondo, O.J., and Nzenti, J.P. Apport des images Landsat7 ETM+ à l’étude structurale du socle archéen de Sangmélima (Sud-Cameroun), Revue Française de Photogrammétrie et deTélédétection, 206, 15-25, 2014. Geometrical and structural characterization of Garoua sedimentary basin, Benue Trough, North Cameroon, using gravity data, J Biol Earth Sci, 2014, 4(1): E25-E33, 2014.Īkame, J.M., Mvondo Ondoa, J., Assatse, T.W., Owona, S., Olinga, J.B, Messi, O.E.J., Ntomba, S. P., Kamguia, J., Nguiya, S., Shandini, Y., Manguelle-Dicoum, E. Interpretation of gravity data derived from the Earth Gravitational Model EGM2008 in the Center-North Cameroon: structural and mining implications, Arab J Geosci 10: 130, 2017. Remote sensing for mineral exploration, Ore Geology Review, 14, 157-183, 1999.Ībate Essi, J.M., Yene Atangana, J.Q. Lithologic mapping in arid regions with Landsat thematic mapper data: Meatiq dome, Egypt, Geological Society of America Bulletin, 99(6), 748, 1987. Concepts, processing and results, International Journal of Remote Sensing. This work is licensed under a Creative Commons Attribution 4.0 International License. ![]() New regional maps, providing a useful insight for further mining exploration, were obtained.ĭigital image processing hydrothermal alteration mapping landsat 8 magnetic data Poli group structural mapping The generation of a target exploration map, via ArcGIS 10.4.1, was performed by the overlay of hydrothermal alteration mapping and structural mapping. Other directions include NE-SW/ENE-WSW, and N-S. The resulting lineaments showed a predominant E-W trending direction, which suggests a major tectonic event having prevailed within the area. Besides, the CET grid analysis tool (horizontal gradient) from Geosoft software 8.4 and the line algorithm (pan band 8) from Geomatica 2013 allowed the extraction of subsurface and surface lineaments respectively. Thus, a classification map emphasizing on mineral targets was obtained from the PCA map. The PCA map was shown to better illustrate hydrothermally altered areas than Band ratios. Based on reference band ratio combinations (Sultan’s and Kaufmann’s) and Crosta Technique (PCA analysis), hydrothermally altered minerals such as hydroxyl-bearing minerals and iron oxides were identified. Hence, the enhancement of both Landsat 8 and magnetic data was achieved via digital image processing (DIP) techniques notably Band rationing (BR), Principal Component Analysis (PCA), Horizontal gradient (HG), and lineament extraction algorithms. In this study, Landsat 8 OLI/TIRS coupled with magnetic data were used in order to realize a regional litho-structural mapping of hydrothermal alteration targets, required for mineral exploration. doi: 10.12691/jgg-7-1-4Ībstract A geological based remote sensing study was carried out over the Poli group in Garoua (northern Cameroon), renowned for its hydrothermally occurring mineralizations (Gold and Uranium). Mapping Hydrothermal Alteration Targets from Landsat 8 OLI/TIRS and Magnetic Data Using Digital Image Processing Techniques in Garoua, North Cameroon. Quentin Marc Anaba Fotze, Anatole Eugene Djieto Lordon, Joseph Penaye, Jean Paul Sep and Mary Immaculate Neh Fru. ![]() View Full Text Full Text PDF Full Text ePUB
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