Rare earth elements plus yttrium (REY) in phosphorites from the Tébessa region (Eastern Algeria): Abundance, geochemical distribution through grain size fractions, and economic significance

Ferhaoui, Safa; Kechiched, Rabah; Bruguier, Olivier; Sinisi, Rosa; Kocsis, László; Mongelli, Giovanni; Bosch, Delphine; Ameur-Zaimeche, Ouafi; Laouar, Rabah

doi:10.1016/j.gexplo.2022.107058

Cited by 22 publications

(14 citation statements)

References 103 publications

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“…The chemical composition confirms that the mineral composition of phosphatic limestone and limestone contains four main minerals: carbonatefluorapatite, calcite, dolomite, and quartz. The results are in agreement with the findings of [25,[34][35][36][37][38][39][40][41][42][43].…”

Section: ) Chemical Analysissupporting

confidence: 92%

Geotechnical Characterization of Phosphate Mining Waste Materials for Use in Pavement Construction

Malaoui

Harkati

Soltani

et al. 2023

Eng. Technol. Appl. Sci. Res.

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Waste rock materials are becoming widely used in road pavement and building constructions in many countries. In this work, experimental laboratory tests were carried out on the waste rock produced from the extraction of the phosphate in the Kef-Essenoun mine, to study the performance of road pavement foundations built with these types of material. Two types of waste, namely phosphatic limestone (type 1) and limestone (type 2), were initially tested to determine the most suitable one to be used in pavement structures. The characterization tests showed that the presence of carbonate-fluorapatite and carbonate-fluorapatite, and calcite, dolomite, and quartz are predominant in phosphatic limestone and limestone, respectively. The Los Angeles Abrasion (LA) and Micro-Deval (MD) values range from 59.9% to 90.4% and 42.05% to 86.31% for phosphatic limestone and from 43.64% to 95.88% and 38.25% to 75% for limestone. The CBR values of type 1 and type 2 waste were found to be 10.5% and 18.7% respectively. The results show that these materials, classified as B42ts and B42s respectively, could be used cautiously in capping layers and pavement backfilling materials. Furthermore, they must be treated with a hydraulic binder such as cement in order to improve their physical and mechanical properties.

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Section: ) Chemical Analysissupporting

confidence: 92%

Geotechnical Characterization of Phosphate Mining Waste Materials for Use in Pavement Construction

Malaoui

Harkati

Soltani

et al. 2023

Eng. Technol. Appl. Sci. Res.

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“…Phosphorus blocks formed in an epicontinental sea have no or positive Ce anomalies, while those formed in a marginal sea mostly exhibit negative Ce anomalies [32]. Meanwhile, the distribution of REY in the phosphorite is mainly controlled by the sedimentary environment, but irrespective of grain size in the rock [33]. By comparing the profiles of the Zhijin samples, it was found that the negative Ce anomalies (δCe) of the phosphatic samples (S3 Table) range from 0.23 to 0.91 (mean of 0.48).…”

Section: Sedimentary Environment Of Phosphoritesmentioning

confidence: 99%

Studies on geochemical characteristics and biomineralization of Cambrian phosphorites, Zhijin, Guizhou Province, China

Gao

Yang

et al. 2023

PLoS ONE

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Phosphate rocks, an important ore resource in Guizhou Province, China, are mainly hosted within the Sinian Doushantuo Formation and the Cambrian Meishucun Formation. In addition, the phosphate rocks of the Cambrian Meishucun Formation are rich in biological fossils. Although numerous studies investigating the genesis of phosphate deposits have been performed, the relationship between biological activity and the formation of phosphate deposits in the lower Cambrian Meishucun Formation has not been convincingly explained. This study focuses on the biological fossil assemblage, the characteristics of phosphorus, and the relationship between biological and phosphorus enrichment of the lower Cambrian phosphorites. The primary objectives of our study are to analyze the role of organisms in the formation of phosphorites, restore the phosphorus-formation environment of the Cambrian Meishucun Formation, and construct a sedimentary model of the phosphorites in the Meishucun Formation. The results indicate that there is a significant positive correlation between biological activity and the deposition of phosphorites, that is, the higher the degree of biological enrichment and differentiation, the stronger the deposition. The geochemical analysis of several profiles in the Zhijin phosphorite block shows that the phosphorite block was deposited in an oxygen-rich environment and was affected by a high-temperature hydrothermal fluid. Upwelling ocean currents supplied abundant phosphorus and other nutrients, which provided the conditions for small shells and algae to flourish. Biochemical activity was a crucial factor in the deposition of the phosphorite.

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“…The third factor (F3; Var.% = 15.8) shows significant and positive weightings for P 2 O 5 , Y, and HREE. The yttrium geochemical affinity for the HREE is well known, and both may be distributed by phosphate minerals in a variety of sedimentary rocks [44,45] and shales [3,46]. F3, coupled with F1, indicates fractionation between LREE and HREE+Y in the southern Apennines shales, suggesting that an index such as (La/Yb) ch non-necessarily records the source area.…”

Section: Factors Affecting the Distribution Of Elementsmentioning

confidence: 99%

Geochemistry as a Clue for Paleoweathering and Provenance of Southern Apennines Shales (Italy): A Review

2023

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The southern Apennines (Italy) chain is a fold-and-thrust belt mainly derived from the deformation of the African–Apulian passive margin where shallow-water, basinal, and shelf-margin facies successions, including fine-grained sediments, occur. Here, we provide a review of the geochemistry of Meso–Cenozoic shales from the Lagonegro basin to elucidate provenance and paleoweathering. The different suites of these shales are dominated by 2:1 clay minerals and are Fe shales and shales. An R-mode factor analysis suggests Ti, Al, and LREE (F1) and K2O-MgO (F2) covariance, likely related to the illite → smectite → kaolinite evolution during weathering. HREE and Y are distributed by phosphate minerals, suggesting LREE/HREE fractionation. The CIA paleoweathering proxy rules out non-steady-state weathering conditions and indicates that the source area was affected by moderate to intense weathering. The paleoprecipitation values derived from the CIA-K and CALMAG indices show median values in the 1214–1610 mm/y range. The Eu/Eu*, Sm/Nd, and Ti/Al provenance ratios point toward a UCC-like source excluding any mafic supply and suggest that the Lagonegro basin was connected, through a southern area, with the African cratonic area. However, the Eu/Eu* median value of the southern Apennine shales is quite similar to the value of the Archean shales, possibly indicating a less differentiated component. This is consistent, in many samples, with the value of the (Gd/Yb)ch ratio, suggesting that the shales likely incorporated ancient sediments derived from African Archean terranes through a cannibalistic process.

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Rare earth elements plus yttrium (REY) in phosphorites from the Tébessa region (Eastern Algeria): Abundance, geochemical distribution through grain size fractions, and economic significance

Cited by 22 publications

References 103 publications

Geotechnical Characterization of Phosphate Mining Waste Materials for Use in Pavement Construction

Geotechnical Characterization of Phosphate Mining Waste Materials for Use in Pavement Construction

Studies on geochemical characteristics and biomineralization of Cambrian phosphorites, Zhijin, Guizhou Province, China

Geochemistry as a Clue for Paleoweathering and Provenance of Southern Apennines Shales (Italy): A Review

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