Role of γ-ray spectrometry in detecting potassic alteration associated with Um Ba’anib granitic gneiss and metasediments, G. Meatiq area, Central Eastern Desert, Egypt

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

“…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.…”

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)

“…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].…”

“…In addition to three radiometric maps, a K/eTh ratio was calculated to highlight locations with higher Potassium content (Figure 4d). High concentrations of this element may reveal possible areas of hydrothermal alteration and mineralization [25,29,56,74].…”

“…Apart from remote sensing data, processing of geophysical data contributes assuredly to minerals exploration through their different geophysical components (gravimetric, magnetometric, electrical, electromagnetic and natural gamma spectrometric methods) [19][20][21][22][23][24]. The natural gamma-ray spectrometric method has been widely and successfully used in mineral exploration and identification of alteration zones [20,21,[25][26][27][28][29][30]. However, few studies have been tested the application of this method in conjunction with the open accessible free satellite images.…”

Recognition of Gold Mineralization Favorability Zones Through Airborne Gamma-Ray Spectrometry and Magnetometry in Brusque and BotuverだRegion, Southern Brazil

“…Potassium presents concentration of 1.5% in the upper crust, commonly occurs in potassic feldspar, mica group minerals and clay-minerals, and is an important guide to define mineralized areas (Ostrovskiy, 1973;Gnojek & Prichystal, 1985;Portnov, 1987;Shives et al, 2000) Uranium and thorium are less abundant (2.7 ppm and 10.5 ppm in the upper crust, respectively), and frequently evidence post-magmatic and hydrothermal processes, eventually related to mineralization (Ulbrich et al, 2009). The geochemical behavior of these elements allows observing hydrothermal, metamorphic and geomorphological processes (Ulbrich et al, 2009;ABD El Nabi, 2011;Ribeiro et al, 2013). By establishing relations between them, such as F Parameter, Efimov (1978) apud Gnojek & Prichystal (1985), and the suggestive parameters for hydrothermal alteration -Kd and Ud, from Saunders et al (1994), these processes can be highlighted (Ostrovskiy, 1973;Portnov, 1987).…”