Lithostratigraphy of the manganese-bearing Um Bogma formation, west-central Sinai, Egypt

Kora, Mahmoud; Shahat, A. El; Abu-Shabana,

doi:10.1016/0899-5362(94)90027-2

Cited by 27 publications

(8 citation statements)

References 8 publications

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“…The Paleozoic rocks of southern Sinai, including the study area, were studied by many authors especially from the geological, mineralogical geochemical and radioactivity points of view (e.g. Kora, 1984;El-Aassy et al, 1986;Dabbour and Mahdy, 1988;El Rakaiby and El Aassy, 1990;Afifi, 1991;Kora et al, 1994;El Agami, 1996). According to these studies, the Paleozoic section at Wadi Naseib area can be subdivided into two main types of sediments: early Paleozoic and late Paleozoic sediments.…”

Section: Geological Aspectsmentioning

confidence: 99%

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Galy

Mezayn

Said

et al. 2008

Journal of Environmental Radioactivity

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Section: Geological Aspectsmentioning

confidence: 99%

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Galy

Mezayn

Said

et al. 2008

Journal of Environmental Radioactivity

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“…The entire Paleozoic succession unconformably overlies the Precambrian basement rocks (gneisses and younger granites) and unconformably underlies the Permo-Triassic sandstone and mudstone red beds. The Abu Thora Formation in certain places is capped by basaltic sheets (Mesozoic), and it is also dissected by doleritic and basaltic dykes [34,35].…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

et al. 2022

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This paper quantitatively determines the occurrences of potentially toxic elements in Carboniferous kaolin in southwestern Sinai, Egypt. This research describes, in detail, the experimental treatment optimization to be used in pharmaceutical applications. The concentrations of As, Co, Ni, Pb, and V in these kaolin deposits exceed the Permitted Concentrations of Elemental Impurities for oral use in pharmaceutical applications. Herein, six desorbing agents (acetic acid, citric acid, DTPA, EDDS, EDTA, and NTA) were utilized as extracting solutions in batch-wise extractions to select the proper reagents. Parameters such as the pH, the mixing speed and time, and the solid–solution ratio were varied to optimize the extraction conditions. The findings indicate that citric acid and EDTA were effective in the removal of the aforementioned elements. The results reveal that the optimum removal of potentially toxic elements from kaolin can be achieved using citric acid and EDTA concentrations of 0.2 M and 0.1 M, respectively, for the treatment of 5 g of kaolin, under a pH of 4 for citric acid, and a pH of 10 for EDTA. The ideal mixing speed and time are 500 rpm and 6 h, respectively. Using 1:10 S/L of citric acid and EDTA showed removal rates of 100% for all the investigated PTEs. We recommend this treatment for different kinds of kaolin showing various degrees of contamination.

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“…3d). Most of the host shale is deposited in the Pre-Carboniferous period on an erosion surface existing between the Adedia Formation and the Urn Bogma Formation [13], [24]. The change in the shale thickness is mainly attributed to its bending, contortion and soft flow under the overload pressures of the overlying massive dolostones and sandstone series.…”

Section: Mineralizationmentioning

confidence: 99%

Geology, mineralogy and geochemistry of manganese ore deposits of the Um Bogma Formation, south-western Sinai, Egypt: genesis implications

El-Shafei¹,

Ramadan²,

Essawy³

et al. 2022

Min. miner. depos.

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Purpose.This paper aims to understand the genesis and nature of the manganese ore deposits associated with the Ras Samra Member of the Um Bogma Formation in the southwest of Sinai. Methods. Mineralogical and geochemical studies of 50 selected samples of manganese ores and host shale have been conducted. These samples have been taken from different sites representing the Ras Samra Member. Findings. The dominant manganese minerals are pyrolusite and hausmannite. In most samples, helvite and hematite are noted in association with pyrolusite. In the investigated manganese ores, wide ranges of MnO (17.70-81.90 wt. %) and Fe2O3 (1.16-65.49 wt. %) concentrations are observed. Based on their Mn/Fe ratio, they can be classified into high-Mn ore content (76.94-6.46%), medium-Mn ore content (4.87-2.58%), and low-Mn ore content (1.51-0.30%). Originality. The compositions of major and trace elements in Ras Samra manganese ores, together with their textures and mineralogical compositions, suggest an epigenetic hydrothermal contribution for high-Mn ores, as well as syngenetic sedimentary precipitation for medium- Mn and low-Mn ores. The epigenetic nature of the high-Mn samples may be related to a younger phase of hydrothermal activity associated with Tertiary basalt flows. Ore-bearing hypogene solutions, which penetrate the bedding planes, have impregnated and cemented non-diagenetic terrigenous sandstones and shale. Practical implications. In contrast to low-Mn ores, high-Mn and medium-Mn ores of Um Bogma are preferable for obtai-ning a significant economic effect in the production of ferromanganese alloys. However, low-Mn ores need to be processed appropriately to achieve the desired quality in order to meet the present level of manganese demand in Egypt.

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Lithostratigraphy of the manganese-bearing Um Bogma formation, west-central Sinai, Egypt

Cited by 27 publications

References 8 publications

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

Geology, mineralogy and geochemistry of manganese ore deposits of the Um Bogma Formation, south-western Sinai, Egypt: genesis implications

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