Lithological and alteration mineral mapping for alluvial gold exploration in the south east of Birao area, Central African Republic using Landsat-8 Operational Land Imager (OLI) data

Traoré, Mamadou; Wambo, Jonas Didero Takodjou; Ndepete, Cyrille Prosper; Tekin, Senem; Pour, Amin Beiranvand; Muslim, Aidy M.

doi:10.1016/j.jafrearsci.2020.103933

Cited by 49 publications

(33 citation statements)

References 68 publications

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“…Landsat-8 Level-1 GeoTIFF Data Product satellite images (placer gold mining sites, their changes over time) were used in the remote study. Image processing methods: False Color Composite (FCC) images in false colors; Band Ratio (BR) creating complex band ratios [11]. Sites digitizing was done by the previously developed methods including index images in the QGIS program.…”

Section: Study Area and Research Methodsmentioning

confidence: 99%

“…According to foreign studies, when processing images, methods are used: False Color Composite (FCC), Band Ratio (BR), which allow you to identify not only disturbed lands, but also to fix the presence of certain minerals. The researchers used to map clay, iron oxides and iron silicates in the ratio of the spectrum bands of 6/7, 4/2 and 6/5 [11]. The possibilities of remote sensing and GIS are applied by the researchers of G.P.O.…”

Section: Introductionmentioning

confidence: 99%

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Geoecological assessment and environmental monitoring within the boundaries of the impact of the development of gold deposits using GIS technologies

Leonenko

Krupskaya²,

Usikov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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An interdisciplinary approach is used in the study of this problem. Well-known methods are used in the work. The ground-based phase of the research consisted of sampling. The results indicate intense pollution. High concentrations of compounds of mercury, arsenic, copper, lead, zinc were recorded. Deciphering the Landsat 8 (GloVis) images made it possible to supplement the mining and environmental monitoring by studying the dynamics of changes in the areas of placer gold mining. Data processing was carried out on the basis of the open geoinformation system Qgis. Image processing methods: False Color Composite (FCC) images in artificial colors; Band Ratio (BR) creates complex band ratios. Digitization of the images showed increasing areas of disturbed land. For the first time, a geo-ecological assessment using GIS technologies was carried out. Over a long period of time, ground monitoring data are entered into the Qgis database. The practical significance of the work is confirmed by the Patent of the Russian Federation and substantiated by the creation of a method to ensure the environmental safety of technogenically polluted areas using bioremediation.

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Section: Study Area and Research Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geoecological assessment and environmental monitoring within the boundaries of the impact of the development of gold deposits using GIS technologies

Leonenko

Krupskaya²,

Usikov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…In present study, the Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes (FLAASH) method was used. This method is a first-principles atmospheric correction tool that corrects wavelengths in the visible through near-infrared and shortwave infrared regions, up to 3 μm (ENVI, 2009;Traore et al, 2020). Finally, lineament map was obtained.…”

Section: Lineament (Lin)mentioning

confidence: 99%

Exploration of geothermal potential using integrated fuzzy logic and analytic hierarchy process (AHP) in Ağrı, Eastern Turkey

Şener¹,

Şener²

2021

Turkish J Earth Sci

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The demand for energy is increasing day by day worldwide due to population growth, industrialization and rising living standards. Geothermal energy, one of the alternative energy sources, is preferred in terms of providing environmentally friendly, quality and regular energy.Our country is rich in geothermal resource potential. However, there are still many unexplored geothermal resources. In this study, fuzzy-AHP method was used to determine the geothermal potential of Ağrı province. Five criteria such as geological formations, hot / mineral springs, lineaments, land surface temperature and hydrothermal alteration zones were evaluated to determine the having geothermal potential. The maps of lineament, land surface temperature and hydrothermal alteration zones were prepared using Landsat 8 OLI/TIRS satellite images.Each criterion was weighted with the fuzzy-AHP method, analyzed in the GIS environment, and the geothermal potential index (GPI) of the study area was calculated. As a result, areas with very high, high, medium and low geothermal potential were determined in the study area.According to the GPI map of the study area, Ağrı provincial center, Patnos, Eleşkirt and Doğubayazıt regions have high geothermal potential. In addition, the known geothermal fields in the study area have been identified as areas with very high geothermal potential. These data reveal the accuracy of the study and used method.

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“…Previous studies have shown the ability of Landsat and ASTER VNIR-SWIR bands to map lithology formations and ophiolitic complexes (Amer et al, 2010;Rajendran et al, 2011;Ramadan 2013;Özkan et al, 2017;Traore et al, 2020a). Based on the characteristics of the spectral bands of Landsat-8 OLI and ASTER image data, specialized band ratios of (7/4, 6/3, 5/7) and (7/6, 6/5 and 4/2) in RGB (Red, Green and blue) of the Landsat-8 OLI satellite image, and ((2 + 4) / 3, (5 + 7) / 6, (7 + 9) / 8), and a new band ratio (3/5, 4/6, 7/6) in RGB from ASTER image acquired in the dry season, and after differents corrections applied in these data, allowed the map the geological formation and distinguished especially the ophiolite rocks of the study area.…”

Section: Brccmentioning

confidence: 99%

Mineral Prοpecting and Lithοlοgical Mapping Using Remοte Sensing Apprοaches in Between Yazihan-Heki̇mhan (Malatya) Turkey

SEVİMLİ>

Traoré

Topak

et al. 2021

Preprint

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The Remote Sensing processing analysis have become a directing and hopeful instrument for mineral investigation and lithological mapping. Mineral exploration in general and bearing chromites associated with ultrabasic and basic rocks of the ophiolite complex in particular has been successfully carried out in recent years using Remote Sensing techniques. Yazıhan-Hekimhan (Malatya) region of East Taurus mountain belt, ranks second in terms of iron mineralization in Turkey are accepted. The area is characterized by high grade iron ore deposits in use, development and exploration. Lithological mapping and chromite ore exploration of this area is challenging owing to difficult access (High Mountain 2243 m) using the traditional method of exploration. The main objective of this research is to evaluate the capacity of Landsat-8 OLI and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite imagery to discriminate and detect the potential zone of chromites bearing mineralized in Malatya (Yazıhan). Several images processing techniques, Vegetation Mask, Band Ratio (BR), Band Ratio Color Composite (BRCC), Principal Component Analysis (PCA), Decorrelation Stretch, Minimum Noise Fraction and Supervised classification using Spectral Angle Mapper (SAM) exist in previous studies have been performed for lithological mapping. The obtained results show that, BR, PCA and Decorrelation Stretch methods applied on NVIR-SWIR bands of Landsat-8 and ASTER were clearly discriminate the ophiolite rocks at a regional scale. In Addition, SAM classification was applied on a spectral signature of differents ultrabasic and basic rocks extracted from ASTER data. The results are promising in identifying the potentials zones of chromite ore mineralization zones within the ophiolite region. Thus, the techniques used in this research are suitable to detect or identify the high-potential chromite bearing areas in the ophiolite complex rocks using Landsat-8 OLI and ASTER data.

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Lithological and alteration mineral mapping for alluvial gold exploration in the south east of Birao area, Central African Republic using Landsat-8 Operational Land Imager (OLI) data

Cited by 49 publications

References 68 publications

Geoecological assessment and environmental monitoring within the boundaries of the impact of the development of gold deposits using GIS technologies

Geoecological assessment and environmental monitoring within the boundaries of the impact of the development of gold deposits using GIS technologies

Exploration of geothermal potential using integrated fuzzy logic and analytic hierarchy process (AHP) in Ağrı, Eastern Turkey

Mineral Prοpecting and Lithοlοgical Mapping Using Remοte Sensing Apprοaches in Between Yazihan-Heki̇mhan (Malatya) Turkey

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