Genesis and evaluation of heavy minerals in black sands: A case study from the southern Eastern Desert of Egypt

Khedr, Mohamed Zaki; Zaghloul, Hamada; Takazawa, Eiichi; El-Nahas, Hesham; Azer, Mokhles K.; El-Shafei, Shaimaa A.

doi:10.1016/j.chemer.2022.125945

Cited by 8 publications

(6 citation statements)

References 111 publications

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“…The elemental composition determined by XRF analysis in this work is comparable to black sand from other regions, as reported by ref. 8 and 9 , also showing high SiO 2 and iron oxide content. The presence of iron oxides gives black colouration.…”

Section: Resultsmentioning

confidence: 97%

“…The particle size and morphology observed in the SEM imaging are comparable to black sands from the Nile region, as analyzed by ref. 8 and 9 , showing predominantly coarse irregular grains. Ansari et al demonstrated successful SEM imaging of methylene blue adsorbed onto cauliflower leaves, appearing as distinct dark spots across the particle surface.…”

Section: Resultsmentioning

confidence: 99%

“…The motivation is to develop a sustainable low-cost wastewater treatment alternative to activated carbon for organic contaminant removal. 6–12…”

Section: Introductionmentioning

confidence: 99%

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Industrial-scale feasibility for textile wastewater treatment via Photocatalysis-adsorption technology using black sand and UV lamp

Wagdy,

Mubarak,

Mohamed

et al. 2024

RSC Adv.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Industrial-scale feasibility for textile wastewater treatment via Photocatalysis-adsorption technology using black sand and UV lamp

Wagdy,

Mubarak,

Mohamed

et al. 2024

RSC Adv.

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“…The Yb/Gd and Ce/Sm ratios are 10.08-23.86 and 3.75-11.28, respectively (Table S4). Their euhedral oscillatory zoning in cathodoluminescence images (Figure 3a,b) and the characteristics of their REE patterns (Figure 5a) suggest that they are magmatic zircons [20,74,75].…”

Section: Zirconmentioning

confidence: 99%

In Situ Mineralogical Constraints on Magmatic Process for Porphyry Deposits in the Upper Crust: A Case from Tongchang–Chang’anchong Porphyry Deposits, SW China

Wang

Zheng

et al. 2023

Minerals

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The magmatic process within upper crust encompasses various contents such as the transition between magmatic and hydrothermal systems and changes in oxygen fugacity (ƒO2), which ultimately play key roles in the formation of porphyry Cu deposits (PCDs). However, tracing these magmatic processes, especially in porphyry systems, is not an easy task. This study reported the detailed process of magmatic fluid exsolution and systematical variation of magmatic ƒO2 within the upper crust of a Tongchang–Chang’anchong porphyry Cu deposit, based on detailed investigations of mineral crystallization sequences and compositional features of the minerals in the fertile porphyries. Results indicate that the fertile porphyries show a high initial ƒO2, with ΔFMQ ≥ +3.0 (ΔFMQ is the deviation of logƒO2 from the fayalite–magnetite–quartz (FMQ) buffer). The magmatic ƒO2 (ΔFMQ) continued to decrease to ~+2 until fluid exsolution occurred at ~790 °C due to wall-rock contamination. The magmatic fluid exsolution process caused a temporary increase in the ƒO2 (to ΔFMQ = ~+3.4). The high magmatic ƒO2 during this process (790–750 °C) resulted in a higher content of ore-forming materials in the exsolved magmatic fluid. When the temperature dropped below 750 °C, the magmatic ƒO2 began to continuously decrease and eventually reached ΔFMQ = ~+0.6. The lower magmatic ƒO2 hindered the further migration of ore-forming materials through the exsolved fluid during this process (< 750 °C). Results of this study indicate that the initial magma during the upper crustal magmatic process of PCDs generally has a high ƒO2, and the contamination of reduced components can significantly decrease the magmatic ƒO2. The early magmatic fluid exsolution process can maintain a high magmatic ƒO2 condition, thereby efficiently extracting ore-forming minerals and producing ore-forming fluids, which is the key to the formation of PCDs. The latter continuous decrease in magmatic ƒO2 during the fluid exsolution process may be the reason preventing the Tongchang–Chang’anchong porphyry Cu deposit to form a giant PCD.

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“…Magnetite, ilmenite, rutile, and zircon not only represent more than 75% of the black sand components but also have the most significant economic feasibility (Khedr et al 2023). For instance, Rutile and Ilmenite are the main sources of titanium dioxide that have different applications in pigments, papers, plastics, and titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of radioactive hazards associated with black sand upgrading processes

Mohamed

Hassan

Ismail

et al. 2023

Applied Earth Science: Transactions of the Institutions of Mini

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Black sands represent a good source of economic minerals with various industrial applications. However, their radioactive properties may prevent their use in specific applications. In this study, zircon, ilmenite, magnetite, and rutile are four minerals represent more than 75% of the black sand content, were selected to evaluate their Intrinsic radiological properties. The chemical composition of these minerals was determined along with their density and particle size. Then, the activity concentrations of the naturally occurring radioactive nuclides were experimentally determined and the most important radiological hazard indices were calculated. The results indicated that the upgrading process concentrates the natural radioisotopes in some minerals like the zircon and rutile leaving the magnetite and ilmenite with lower content than permissible limits. Moreover, the risk analysis identified the dangerous conditions and situations and suggest possible solutions to reduce these hazardous situations to a minimum and to keep a safe environment for the workers.

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Genesis and evaluation of heavy minerals in black sands: A case study from the southern Eastern Desert of Egypt

Cited by 8 publications

References 111 publications

Industrial-scale feasibility for textile wastewater treatment via Photocatalysis-adsorption technology using black sand and UV lamp

Industrial-scale feasibility for textile wastewater treatment via Photocatalysis-adsorption technology using black sand and UV lamp

In Situ Mineralogical Constraints on Magmatic Process for Porphyry Deposits in the Upper Crust: A Case from Tongchang–Chang’anchong Porphyry Deposits, SW China

Risk assessment of radioactive hazards associated with black sand upgrading processes

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