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Showing 1 to 20 of 100 for “"Pge"”.
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Application of platinum-group element (PGE) geochemistry to select geological problems
… the concentrations of platinum-group elements (PGEs), analysed by the fire-assay isotope dilution method, to determine the timing of sulfide saturation in an evolving magma system, which in relation to volatile saturation is one of the most important factors controlling magma fertility. The time …
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Application of platinum-group element (PGE) geochemistry to select geological problems
… the concentrations of platinum-group elements (PGEs), analysed by the fire-assay isotope dilution method, to determine the timing of sulfide saturation in an evolving magma system, which in relation to volatile saturation is one of the most important factors controlling magma fertility. The time …
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RE – OS AND PGE GEOCHEMISTRY OF ORGANIC-RICH SEDIMENTARY ROCKS AND PETROLEUM
The research in this thesis is presented in paper format with each of four chapters representing one complete study. Chapter two presents Re–Os and geochemical fingerprint data for UK Atlantic margin oils. organic and δ13C geochemical data demonstrate that the oil is sourced from Upper Jurassic …
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Investigating the use of sodium metasilicate to improve the flotation performance of altered PGE ores
Mineral hydration is known to result in low flotation recoveries and grades within primary platinum group element ores worldwide. This is because the phyllosilicate minerals derived from hydration reactions of silicate minerals (i) form electrostatic coatings on valuable minerals that in turn …
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High tenor NI-PGE sulfide mineralization of the south manasan ultramafic intrusion, Thompson Nickel Belt, Manitoba
… (TNB) contains Ni and platinum group element (PGE) mineralization hosted by disseminated sulfide. Whole-rock Ni values range from 0.3 to 1.7 wt. % and total precious metals (TPMs) range from 0 to 1.3 ppm Pt + Pd + Au and equate to tenor values (i.e., metal in 100% sulfide) of 11-39 wt. % Ni and …
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A study of millerite from Cu-Ni-PGE footwall veins, Sudbury, ON: crystal-chemistry, morphology, & geological implications
… is a common accessory mineral in magmatic Cu-Ni-PGE deposits, such as those occurring in Sudbury, Ontario, Canada. In such localities, millerite develops as platy crystals, often forming large, cleavable masses. This is in stark contrast to the more widespread occurrence of millerite as a …
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Magmatic evolution of the southern Centinela district, northern Chile: insights from PGE geochemistry and zircon fertility tools
… have shown that the platinum group elements (PGE) are sensitive indicators of sulphide saturation in evolving magma systems, which may be a key in controlling the fertility of Cu and Au in porphyritic deposits. The Centinela District, located in northern Chile, is part of the middle Eocene to …
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Magmatic evolution of the southern Centinela district, northern Chile: insights from PGE geochemistry and zircon fertility tools
… have shown that the platinum group elements (PGE) are sensitive indicators of sulphide saturation in evolving magma systems, which may be a key in controlling the fertility of Cu and Au in porphyritic deposits. The Centinela District, located in northern Chile, is part of the middle Eocene to …
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Investigating the use of sodium silicate to improve the flotation performance of Platreef and UG2 PGE ores
… problems simultaneously in a highly altered PGE ore thereby enhancing flotation performance. Therefore, there is a need to assess sodium silicate performance on moderately altered to relatively unaltered PGE ores, where there is no published data in this regard. To assess how sodium silicate …
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An Investigation of Ni and Cu Isotopic Fractionation in Basal Duluth Complex Cu-Ni-PGE Mineralization, Northeastern Minnesota
Cu-Ni-PGE magmatic sulfide-style mineralization occurs along the western margin of the Duluth Complex in northeastern Minnesota. Previous studies have demonstrated a notable fractionation of 60Ni and 58Ni in terrestrial materials, including both primary and secondary phases, with a total range of …
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The interactive effect of depressant type and dosage with frother dosage in the flotation of a PGE ore
… components of the platinum group element (PGE) bearing ores of the Bushveld complex in South Africa constitute between 1 % and as little as 0.1 % of the total mass. In the processing of these ores by flotation, the naturally hydrophobic talc minerals cause over stable froths. The drainage …
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Sorption of the platinum-group elements in selected solid matrices
Recent research on the platinum-group elements (PGE) has shown increased concentrations in environmental samples, probably as a result of the widespread use of PGE (Pt, Pd and Rh in particular) as catalysts in the chemical and car industry. Most of the recent research on PGE focuses on the analysis …
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ΚΑΤΑΝΟΜΗ ΤΩΝ ΣΤΟΙΧΕΙΩΝ ΤΗΣ ΟΜΑΔΑΣ ΤΟΥ ΛΕΥΚΟΧΡΥΣΟΥ (PGE) ΚΑΙ ΤΟΥ ΧΡΥΣΟΥ ΣΕ ΧΡΩΜΙΤΙΚΑ ΜΕΤΑΛΛΕΥΜΑΤΑ ΚΑΙ ΠΕΤΡΩΜΑΤΑ ΤΟΥ ΟΦΙΟΛΙΘΙΚΟΥ ΣΥΜΠΛΕΓΜΑΤΟ...
… PROCESSES. THECHANGES IN THE DISTRIBUTION OF PGE AMONG THE THREE UNITS MAY BE EXPLAINED BY THE DEGREE OF PARTIAL MELTING OF THE PREMITIVE UPPER MANTLE AS WELL AS THE DEGREE OF FRACTIONAL CRYSTALLIZATION OF THE PARENT MAGMA. THE DISTANCE OF THE MAGMA CHAMBER FROM THE SPREADING CENTER AND THE …
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The Cellular and Molecular Mechanisms of Prostaglandin E₂ in Myogenesis
Prostaglandin E₂ (PGE₂), the most abundant prostaglandin (PG) in our body, has multiple biological functions related to physiological activities and the development of diseases. Emerging evidence has shown that PGE2 plays an important role in regulating the survival and proliferation of …
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Platinum-group element mineralisation in the Shetland ophiolite complex
… This study examines the distribution of PGE within a representative fresh vertical section of the ophiolite stratigraphy, to assess the relative roles of such processes in the concentration and fractionation of PGE. In the field area around Balta Sound, tectonised mantle harzburgites are …
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Platinum-group elements geochemistry of felsic rocks
… mechanisms by which the platinum group elements (PGE) concentrate and fractionate during magmatic processes, especially in felsic magmatic systems, is poorly understood. The felsic igneous rocks are often linked to hydrothermal Cu-Au mineralization and the presence or absence of sulfide saturation …
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