Petrography, mineralogy, geochemistry and genesis of the Balaya bauxite deposits in Kindia region, Maritime Guinea, West Africa

Mineralogical and Geochemical Characteristics of the Sangarédi Bauxite Deposit, Boké Region, Republic of Guinea

“…The Sangaré di bauxite deposit differs somewhat in mineralogy and chemistry from the Balaya bauxite deposits in the Kindia region of Guinea as studied by Sidibe and Yalcin [10]. Minerals in the Sangaré di bauxite deposit are mainly gibbsite and boehmite, accompanied by small amounts of kaolinite, quartz, rutile, diaspore and dawsonite, whereas the Balaya deposits, contain gibbsite, anatase, hematite, rutile, aluminium-bearing goethite, kaolinite and diaspore [10]. Quartz and dawsonite are absent in the Balaya deposits [10].…”

“…Bacteria are very abundant on Earth [16][17][18][19], and can drive low-temperature reactions that are not thermodynamically spontaneous, which would enhance weathering. Although goethite is present in the Sangaré di deposit (1.46 to 8.89 vol%), it is significantly lower than in Balaya bauxite deposits 1.6 to 19.00 vol% [10]. The abundant gibbsite and associated kaolinite in the Sangaré di deposit (Table 1) is thought to have formed through leaching of Si from kaolinite.…”

“…Minerals in the Sangaré di bauxite deposit are mainly gibbsite and boehmite, accompanied by small amounts of kaolinite, quartz, rutile, diaspore and dawsonite, whereas the Balaya deposits, contain gibbsite, anatase, hematite, rutile, aluminium-bearing goethite, kaolinite and diaspore [10]. Quartz and dawsonite are absent in the Balaya deposits [10]. Distribution histograms for the abundance of gibbsite, boehmite, goethite-aluminian, anatase and hematite in the Sangaré di bauxite samples, show that these minerals vary considerably in abundance (Figures 11 and 12).…”

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

“…Recalling the sustainable approaches in different technological processes, they are also from the very large availability of raw material, and the related socio-economic development from local resources valorization. Guinean bauxite deposits are one of the world's main reserves that are used for metallurgical purposes by foreign companies [15] [19]. The broader exploitation of this largely available resource is fundamental for socio-economic development, especially in the context of a developing country.…”

Explanation of the Sutlegen Bauxites to Some REE Contents by Statistical Approach and Inequality Expressions

“…In bauxite formation processes, the rare earth element (REE) concentrations, as well as the characteristics of the environment, vary due to chemical alteration processes (Maksimovic & Panto, 1991;Yalcin & Temur, 2006;Yalcin & Ilhan, 2008;Kansun et al, 2010;Nyamsari & Yalcin, 2017;Nyamsari et al, 2019;2020;Sidibe & Yalcin, 2019;Yalcin et al, 2012;2016a). Rare earth elements are studied under two groups: light rare earth elements (LREEs) and heavy rare earth elements (HREEs).…”