Using air-borne gamma ray spectrometry and remote sensing data for detecting alteration zones around Wadi Saqia area, Central Eastern Desert, Egypt

Ghoneim, S.M.; Nabi, Sami Hamed Abd El; Yehia, M.; Salem, S.M.

doi:10.1016/j.jafrearsci.2021.104181

Cited by 13 publications

(8 citation statements)

References 31 publications

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“…This step is important because it allows us to determine the source of the radioelements in the different rock types outcropping in the study area (Mamouch et al., 2022). The second step is to highlight hydrothermal alteration zones using the F parameter (), one of the most widely used parameters to identify K‐rich zones correlated with hydrothermal activity (Abd El Nabi, 2013; Efimov, 1978; Ghoneim et al., 2021; Gnojek & Přichystal, 1985). The third step aims at lithological mapping and identifying areas where radioactive elements are concentrated by combining the three radioelements (K, eTh, eU) in the red, green and blue colour system.…”

Section: Methodsmentioning

confidence: 99%

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Mapping and litho‐geophysical classification of potential mining areas by spatial remote sensing and helicopter‐borne gamma‐ray spectrometry (Tikirt, Anti‐Atlas, Morocco)

Achkouch

Miftah

Ouchchen

et al. 2023

Geophysical Prospecting

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The primary focus of this study is to explore the potential mineral areas. Advanced Spaceborne Thermal Emission and Reflection Radiometer images and radiometric data were combined in the Tikirt region to map hydrothermal alteration zones associated with mineralized deposits. Advanced Spaceborne Thermal Emission and Reflection Radiometer images were analysed using band ratios, principal component analysis and a fuzzy logic model to discover argillic, phyllic, propylitic and iron oxide alterations and to generate a mineral prospectivity map. In addition, mono‐element maps of radiometric elements (K in %, eU in ppm, eTh in ppm) and their behaviour in the ternary image have been elaborated to determine the concentrations of radiometric elements and the variation of radiometric character along the exposed terrains. The F parameter was calculated to target high potassium concentration areas associated with hydrothermal alteration zones. Combining the two methods highlighted four hydrothermal alteration zones considered very promising from a mining point of view. These zones are generally linked to the magma bodies affected by normal faults and exhibit a clear spatial correlation with mineral occurrences.

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Section: Methodsmentioning

confidence: 99%

“…clay alterations and iron oxides) on the radioactive elements K, eU and eTh distribution (Aisabokhae & Osazuwa, 2021;Badr, 2021;Dentith & Mudge, 2014, pp. 222;Ghoneim et al, 2021;Mamouch et al, 2022;Riahi et al, 2022Riahi et al, , 2021.…”

Section: Introductionmentioning

confidence: 99%

Mapping and litho‐geophysical classification of potential mining areas by spatial remote sensing and helicopter‐borne gamma‐ray spectrometry (Tikirt, Anti‐Atlas, Morocco)

Achkouch

Miftah

Ouchchen

et al. 2023

Geophysical Prospecting

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“…They were then interpolated using the inverse distance weighting (IDW) interpolation method to obtain maps representing the horizontal variation of radioactive concentrations of three elements: (i) Potassium (K in %), (ii) equivalent Thorium (eTh in ppm), and (iii) equivalent Uranium (eU in ppm). Furthermore, ratios of K/eTh and K/eU were calculated to delineate Potassium enrichment zones as indicators of potential mineral resource-related alteration zones [25,28,[56][57][58] (Figure 3). The image was pre-processed using the Fast Line-of-sight Atmospheric Analysis of Hypercubes (FLAASH) method [59][60][61].…”

Section: Radiometric Datamentioning

confidence: 99%

Mapping of Hydrothermal Alteration Zones in the Kelâat M’Gouna Region Using Airborne Gamma-Ray Spectrometry and Remote Sensing Data: Mining Implications (Eastern Anti-Atlas, Morocco)

et al. 2022

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The mapping of hydrothermal alteration zones associated with mineralization is of paramount importance in searching for metal deposits. For this purpose, targeting alteration zones by analyzing airborne geophysical and satellite imagery provides accurate and reliable results. In the Kelâat M’Gouna inlier, located in the Saghro Massif of the Moroccan Anti Atlas, natural gamma-ray spectrometry and ASTER satellite data were used to map hydrothermal alteration zones. Natural gamma-ray spectrometry data were processed to produce maps of Potassium (K in %), Uranium (eU in ppm), Thorium (eTh in ppm) and ratios of K/eTh and K/eU. In addition, four-band ratios were computed, on ASTER data, to map the distribution of clay minerals, phyllitic minerals, propylitic minerals, and iron oxides. The combined results obtained from geophysical and satellite data were further exploited by fuzzy logic modelling using the Geographic Information System (GIS) to generate a mineral prospectivity map. Seven hydrothermal alteration zones likely to be favorable for mineralization have been identified. They show a spatial correlation with (i) known surface prospects and mineral occurrences, (ii) the granite-encasing contact zone, and (iii) the fault zones (Sidi Flah and Tagmout faults). This research therefore provides important information on the prospecting of mineral potential in the study area.

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“…Thus, the ratios show subtle characteristics that are not apparent in the original grids (Grant 1998). Therefore, they are better correlated with lithological units and are useful for characterizing different lithofacies and the specific geochemical conditions of mineralized zones (Linden and Akerblom 1976;Duval 1983;Dentith and Mudge 2014;Ba et al 2020;Ghoneim et al 2021;Mamouch et al 2022). In the present work, we have used normalized channel sum reports to calculate the relative concentrations of K, Th, and U.…”

Section: Spectral Angle Mapper (Sam)mentioning

confidence: 99%

Mapping of favourable mining areas in the Tiouit area by multispectral remote sensing and airborne gamma-ray spectrometry coupled with geochemical data (Eastern Anti-Atlas, Morocco)

Miftah

Azzab

Attou

et al. 2022

Applied Earth Science

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The current investigation concern Tiouit region in order to perceive potential mining zones. Remote sensing data were the main component to process. In order to spot geochemical anomalies associated with the target zones, multispectral ASTER data, gamma-ray spectrometry, and stream sediment data were used. Crosta and SAM applications granted to map a spatial distribution of propylitic, phyllic, clay, and ferruginous alteration zones. The normalized ratios let the delineation of potassic alteration zones, including the Tiouit gold mine characterized by an intense alteration in the Ikniwn granodiorite. Thus, the potassic alteration zones are consistently co-located with the tectonic structures materialized by strong fracturing densities. The stream sediment geochemical investigation revealed that the cited areas have an important potential of mineralization, with high concentrations of As (136 g/t), Cu (91 g/t), Pb (141 g/t), Zn (392 g/t), Ag (3 g/t), Mo (11 g/t), Mn (0.2 g/t), and Fe (10.63 %).

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Using air-borne gamma ray spectrometry and remote sensing data for detecting alteration zones around Wadi Saqia area, Central Eastern Desert, Egypt

Cited by 13 publications

References 31 publications

Mapping and litho‐geophysical classification of potential mining areas by spatial remote sensing and helicopter‐borne gamma‐ray spectrometry (Tikirt, Anti‐Atlas, Morocco)

Mapping and litho‐geophysical classification of potential mining areas by spatial remote sensing and helicopter‐borne gamma‐ray spectrometry (Tikirt, Anti‐Atlas, Morocco)

Mapping of Hydrothermal Alteration Zones in the Kelâat M’Gouna Region Using Airborne Gamma-Ray Spectrometry and Remote Sensing Data: Mining Implications (Eastern Anti-Atlas, Morocco)

Mapping of favourable mining areas in the Tiouit area by multispectral remote sensing and airborne gamma-ray spectrometry coupled with geochemical data (Eastern Anti-Atlas, Morocco)

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