Application of multivariate statistical analyses in the interpretation of geochemical behaviour of uranium in phosphatic rocks in the Red Sea, Nile Valley and Western Desert, Egypt

El-Arabi, Abd El-Gabar M.; Khalifa, Ibrahim H.

doi:10.1016/s0265-931x(01)00124-2

Cited by 25 publications

(5 citation statements)

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“…Following the sedimentation of the phosphate ore, U might substitute Ca in the apatite crystal and/or is adsorbed into it or forms uranium phosphate minerals such as phosphuranylite [18].…”

Section: Uraniummentioning

confidence: 99%

Review of the Main Factors Affecting the Flotation of Phosphate Ores

et al. 2020

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The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation takes place in phosphate enrichment processes, since it is cheap, convenient, and well developed. Nevertheless, it is a complex technique as it depends on the mineral’s superficial properties in aqueous solutions. Aspects such as wettability, surface charge, zeta potential, and the solubility of minerals play a basic role in defining the flotation conditions. These aspects range from the reagents type and dosage to the pH of the pulp. Other variables namely particles size, froth stability, and bubbles size play critical roles during the treatment, as well. The overall aim is to control the selectivity and recovery of the process. The following review is an attempt to add to previous works gathering phosphate froth flotation data. In that sense, the relevant parameters of phosphate ores flotation are discussed while focusing on apatite, calcite, dolomite, and quartz as main constituent minerals.

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“…Following the sedimentation of the phosphate ore, U might substitute Ca in the apatite crystal and/or is adsorbed into it or forms uranium phosphate minerals such as phosphuranylite [18].…”

Section: Uraniummentioning

confidence: 99%

Review of the Main Factors Affecting the Flotation of Phosphate Ores

et al. 2020

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“…Phosphate rocks widely vary in both chemical composition and the nature of associated principle minerals. Therefore, the big concern in phosphate ore production is blending operation (Ashayeri, van Eijs, & Nederstigt, 1994;Shih & Frey, 1995;El-Arabi & Khalifa, 2002;Gholamnejad & Kasmaee, 2012;Song, Hu, & Li, 2012). Spectrophotometric technique has been used to analyze the chemical composition of phosphate rocks at chemical labs of Nile Valley Company as listed in Table 5.…”

Section: Figure 4 Stages Of Blending Operationmentioning

confidence: 99%

Optimization of blending operation for Aswan phosphate mines using linear programming

Ali¹,

Wasly²,

Abdellah³

et al. 2018

Min. miner. depos.

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Purpose. The economic value of phosphate is reduced when randomly blending raw phosphate produced from different mines. Therefore, the blending process of different raw phosphate ores to produce economic percentage of P 2 O 5 is essential to maximize the profit of a mine as regards suitable mine design.Methods. This paper presents an application of Linear programming (LP) method to determine the optimum quantities of phosphate ore needed per each mine for blending process. Three phosphate operations, located in Aswan province south of Egypt, have been chosen for this study namely B1, B2 and C. Findings.The results of LP methods reveal that the phosphate ore of 24% of P 2 O 5 will be produced by blending 16.8% of phosphate ore from operation B1, 9.42% of phosphate ore from operation B2 and 73.78% of phosphate ore from operation C. Whilst the phosphate ore of 22% P 2 O 5 will only be obtained by blending 66.43% of phosphate ore from operation B1 and 33.57% from mine B2.Originality. Estimating the suitable height of benches according to stability, safety of work place and efficiency of work place. The suitable height of benches was found according to the efficiency of work place ranged from 12 m to 30 m. Sub benches were divided to keep the assays of the phosphate ores from dilution and the result is that the height of sub bench for overburden ranged from 7 m to 11 m, for the third layer from 0.2 m to 0.3 m, for the upper layer from 0.4 m to 0.6 m and for the lower layer from 0.3 m to 1 m. Practical implications. Applied linear programming in mining as regard mining operations to obtain the optimum solution in mining sites.

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“…In an anoxic environment, brief oxygenated episodes are required for phosphate precipitation (formed in an early diagenetic marine environment; McClellan and Van Kauwenbergh, 1990) which subsequently adsorbs uranium (e.g. Fisher and Wignall, 2001;El-Arabi and Khalifa, 2002). Uranium concentrations may be explained by ionic substitution of Ca 2+ by the tetravalent U 4+ (i.e.…”

Section: Productivity Proxiesmentioning

confidence: 99%

“…It is more likely U is in the oxidized U 6+ state which can be fixed by phosphate ions (e.g. El-Arabi and Khalifa, 2002). The U adsorption by phosphate would occur under slow sedimentation rates as dissolved uranium can have a residence time of 1000-2000 years (Anderson, 1987).…”

Section: Productivity Proxiesmentioning

confidence: 99%

Sediment geochemistry of the Lower Jurassic Gordondale Member, northeastern British Columbia

Ross

Bustin

2006

Bulletin of Canadian Petroleum Geology

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Paleoenvironments during the Jurassic Gordondale Member sedimentation have been investigated using detailed geochemistry. Four offshore marine litho-stratigraphic units occur within the Gordondale in the Peace River Embayment area of northeastern British Columbia (NE B.C.). The basal mudstone conglomerate/breccia unit (unit A) represents the initiation of a transgression across the basin. The overlying phosphatic marlstone (unit B) was deposited during a time of high organic productivity, characterized by enrichments in the productivity proxying element P 2 O 5 and total organic carbon (TOC) contents averaging 5.5 weight percent. Under these conditions, bio-productivity elements (V, Cr, Cu, Ni, Zn) were effectively incorporated with the organic fraction (matrix bituminite). The co-occurrence of the marine phosphate francolite and pyrite suggests the dysoxic-anoxic redox boundary oscillated vertically in the sediment with time.A shift in geochemistry occurs at the onset of the overlying unit C deposition. Unit C sediments are highly siliceous, low in detrital proxying elements (e.g. Al 2 O 3 , K 2 O, Fe 2 O 3 , TiO 2 , Rb, Co, Zr, Nb) and characterized by high TOC (6-21 weight percent). Excess SiO 2 (i.e. silica which cannot be accounted for by the aluminosilicate phase) accounts for up to 94% of the SiO 2 in the organic-rich sections, suggesting a biosiliceous source. A productive water column is also inferred by relatively high Ba concentrations. The low concentrations of all other major oxides and trace metals in unit C reflect silica dilution in the depositional basin. Carbon-S-Fe plots show a sulfidic bottom-water environment persisted for much of unit C deposition where S was concentrated into the organic fraction (alginite and matrix bituminite) due to the lack of Fe available for pyrite formation.Unit D represents two different stages of sedimentation. The contact between units C and D is marked by a phosphatic rich-marlstone, depleted in all major and trace elements except CaO, P 2 O 5 and Mn. The enrichment of Mn in the carbonate suggests dissolved oxygen was present in bottom waters. Thereafter, unit D is dominated compositionally by detrital proxying elements (clays and associated elements such as Ti, K and Fe) reflecting an increase of terrigenous input. However, despite the sediment-dilution by aluminosilicate phases, TOC contents are comparable to unit B, averaging 5.6 weight percent. RÉSUMÉLes paléoenvironnements durant la sédimentation du Membre Gordondale du Jurassique ont été étudiés en utilisant une géochimie détaillée. Quatre unités lithostratigraphiques marines hauturières apparaissent à l'intérieur du Gorgondale dans la région de la baie de Peace River au nord-est de la Colombie Britannique (NE CB). L'unité de base de conglomérat /brèche de mudstone (unité A) représente le déclenchement d'une transgression à travers le bassin. La marlstone phosphatée superposée (unité B) s'est déposée durant une production organique élevée, caractérisée par des enrichissements dans la productivité d'éléments...

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Application of multivariate statistical analyses in the interpretation of geochemical behaviour of uranium in phosphatic rocks in the Red Sea, Nile Valley and Western Desert, Egypt

Cited by 25 publications

References 4 publications

Review of the Main Factors Affecting the Flotation of Phosphate Ores

Review of the Main Factors Affecting the Flotation of Phosphate Ores

Optimization of blending operation for Aswan phosphate mines using linear programming

Sediment geochemistry of the Lower Jurassic Gordondale Member, northeastern British Columbia

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