Physical Structure and Chemical and Mineralogical Composition of the Mazidagı (Turkey) Phosphate Rock

Özer, A. Kadir; Gülaboǧlu, and M. Ş.; Bayrakçeken, Samih

doi:10.1021/ie990441v

Cited by 25 publications

(15 citation statements)

References 8 publications

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“…Um El-Hwutat average P 2 O 5 (25.73%) higher than the average values 17.86, 25.65 and 19.3% [17,9,18]; respectively but is relatively comparable (27.7 %) to that signed by Abou El-Anwar, et al, [14]. Phosphate rocks for Yunis are classified as low-grade ore (5.26-19.29% P 2 O 5 ) and those of Um El-Hwutat classified to high-grade ore (23.84-289% P 2 O 5 ) according to Ozer, et al, [19] and Gabriel [7]. More than 20% of P 2 O 5 indicated that of minerals of the apatite group, such as hydroxylfluorapatite, carbone fluorapatite.…”

Section: Major Oxides (%) and Trace Elements (Ppm)supporting

confidence: 51%

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

2019

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T HE Duwi Formation in Qusseir-Safaga region is conformably overlain by the Qusseir variegated shales and underlain by the Dakhla shales. The studied phosphatic rocks in the Duwi Formation, is an attractive rock unit for it's enrichment in heavy metals and U content.Mineralogically, phosphatic rocks in the Duwi Formation are mainly composed mainly of fluorapatite, in addition to minor occurrence of calcite, dolomite, gypsum, quartz, and pyrite. Geochemical data reveal that the rocks of the Duwi Formation were deposited under anoxic environments. The present study used the statistical result of the interrelation between P 2 O 5 , F and U concentrations on Egyptian phosphate samples and compared to the measured data. Uranium mostly occurs in an oxidized U 6+ state. It could be fixed with the phosphatic ion, forming secondary uranium phosphate minerals such as phosphuranylite and belovite in Qusseir region. In addition to Uranyl phosphates, uranium minerals in Safaga region contain also Uranyl carbonates and Uranyl sulfates, which had been attributed to the post-depositional U enrichment. The chemical data and index show that the phosphatic rocks in Safaga region are more enriched in the majority trace and rare earth elements, and are subjected to high chemical weathering than those in Qusseir region.

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Section: Major Oxides (%) and Trace Elements (Ppm)supporting

confidence: 51%

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

2019

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“…They are classified into four groups. They are sedimentary marine origin (75%), igneous origin (15-20%), metamorphic and weathered origin (8%), and 2-3% as biogenic sources (Ozer et al 2000). Silica, clayey and calcareous materials are gangue minerals for the sedimentary phosphate origin.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy, geochemistry and origin of the phosphorites at Um El-Huwtat mine, Quseir, Central Eastern Desert, Egypt

El‐Anwar

Rahim

2022

Carbonates Evaporites

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X-Ray diffraction results for the study mine are mainly represented by two phases (phosphatic and non-phosphatic). First phase is represented by apatite (fluorapatite) which is the dominant. The second phase includes carbonate minerals; calcite, dolomite, evaporated mineral (gypsum), sulphide mineral (pyrite), in addition to quartz as a silicate mineral. These results are confirmed by the petrographic study. The detailed microscopic examinations indicate that the phosphorites at the study mine is essentially composed of phosphatic lithoclasts (mainly collophane), phosphatic bioclasts (bone fragments, spines and teeth of vertebrates such as shark fish as well as coprolites), opaques, and quartz embedded in a microcrystalline phosphatic matrix (contains some of dahllite) associated with a microcrystalline quartz according to their decreasing order of abundance. The paragenetic sequence of the studied phosphorites is as follows: fluorapatite, collophane then followed by dahllite. The redox-sensitive trace elements, its ratios, authigenic uranium as well as Fe/Ti can be signifying the redox conditions. Also, they revealed that the study rocks are deposited under the oxic to anoxic environment coupled with hydrothermal solution. The trace and rare earth elements are generally associated with phosphatic rocks. Thus, the phosphatic rocks of Um El-Huwtat mine, Quseir can be considered as sources of trace and rare earth elements. Also, pyrite can be considered as another possible source for REEs. The studied phosphatic rocks characterized by light REE (LREE = 69 ppm) enrichment than heavy REE (HREE = 25 ppm). All the recoded values of the heavy metals for the study mine are higher than those in Tunisia (400.3 ppm), Morocco (571.75 ppm) and Jordan (187 ppm). The post-depositional conditions are responsible for the enrichment of U and Th and/or intensive chemical weathering in Quseir area. Enrichment Factor (EF) indicated that the enrichment or deletion of the elements may be a function of that association and the origins of the various phosphate fractions. The studied phosphatic rocks are suitable for industrialized fertilizers according to the world guides.

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“…The common gangue minerals (impurities) in phosphate rock include silicate minerals (quartz, mica), carbonate minerals (calcite, dolomite) and clay [3]. Most of phosphate rock in the world cannot be directly used in the production of phosphorus products, it must be through mineral processing to obtain economic utilization [4].…”

Section: Introductionmentioning

confidence: 99%

Occurrence of Sesquioxide in a Mid-Low Grade Collophane-Sedimentary Apatite Ore from Guizhou, China

Deng

Zhang

et al. 2020

Minerals

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Checking the presence of sesquioxide (Fe2O3, Al2O3) is helpful for its removal in advance. Therefore, the occurrence of sesquioxide in a mid-low grade calcareous-siliceous collophane ore (massive carbonate-apatite, also known as francolite) from Guizhou, China was determined by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), field emission scanning electron microscope-energy dispersive X-ray spectrometry (FESEM-EDX) and Mineral Liberation Analyzer (MLA). The results show that iron mainly occurs as pyrite FeS2, goethite FeO(OH) and as substitution within dolomite Ca(Mg,Fe)(CO3)2, while aluminum is enriched in muscovite KAl2(AlSi3O10)(OH)2 and also found in apatite (F,CO3)CaPO4 and calcite CaCO3 due to isomorphism or adsorption. All these minerals are fine-grained, among which pyrite and goethite tend to be enriched in larger particles. Intergrowth is predominant in the six minerals’ locking. Pyrite is mainly intergrown with calcite, biotite and also included in apatite and muscovite, while the monomer pyrite appears as semi-automorphic fine grain with the liberation of 56.1%. Apatite particles are mainly intergrown with quartz and calcite. Most of goethite, dolomite, muscovite and calcite form intergrowth with apatite, with contents of 21.7%, 11.1%, 19.5% and 41%, respectively. The removal of pyrite, goethite, dolomite, muscovite and calcite in the ore is the key to reduce the contents of Fe2O3 and Al2O3. In the subsequent beneficiation, the ore must be fully ground. In addition to flotation, magnetic separation can also be considered to remove part of iron in ore. For the removal of aluminum from apatite, leaching method can be considered.

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Physical Structure and Chemical and Mineralogical Composition of the Mazidagı (Turkey) Phosphate Rock

Cited by 25 publications

References 8 publications

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

Mineralogy, geochemistry and origin of the phosphorites at Um El-Huwtat mine, Quseir, Central Eastern Desert, Egypt

Occurrence of Sesquioxide in a Mid-Low Grade Collophane-Sedimentary Apatite Ore from Guizhou, China

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