— A leaching process for platinum contained in a magnetite ore was studied, as an alternative process to cyanidation and aqua regia digestion. ... The magnetite mineral matrix was not attacked during the leaching of platinum group metals. Graphical abstract. Platinum, palladium and gold extraction from a magnetite concentrated ore.
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— Most deposits of platinum group elements (PGE), chromite, and vanadiferous magnetite occur in mafic intrusions. Several represent some of the most laterally continuous and uniform, in terms of grade and thickness, of all orebodies. Such continuity presents one of the major challenges to orebody modeling, in that any proposed process must be ...
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— Magmatic nickel-copper-platinum group elements (Ni-Cu‑PGE) deposits in mafic–ultramafic intrusions account for > 50% of the Ni and > 95% of the Pt and Pd currently produced (Mudd and Jowitt 2022).Many of the major magmatic Ni-Cu-PGE sulfide deposits, like Noril'sk (Russia), Voisey's Bay (Canada), and Jinchuan (China), are found …
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— Berzina (2012) studied the concentration of platinum group elements (PGE) in magmatic magnetite from porphyry Cu–Mo deposits in Siberia, Russia. This study shows that higher levels of Rh and lower contents of Pt and Pd discriminate magnetite in mineralization from those in the host rocks.
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— 1. Introduction. Magnetite is the most widespread iron oxide mineral in magmatic Ni Cu sulfide deposits. It can crystallize under a wide range of oxygen fugacities (i.e., from the hematite-magnetite buffer down to the iron-magnetite or magnetite-wüstite buffer, Buddington and Lindsley, 1964), and across a wide temperature range (ie., from …
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Platinum-group element mineralogy. 2.1.1. Introduction. The distribution of PGEs (platinum-group elements) in an ore is directly related to the type of ore, which in turn, dictates the …
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— The trace-element composition of magnetite in Ni–Cu–platinum-group element (PGE) sulfide deposits is influenced by magmatic evolution, fractional crystallization of sulfide liquid, and post ...
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— Most of the world's primary platinum-group element (PGE) resources are found within three layered intrusions, the Bushveld Complex of South Africa, the Stillwater Complex of MT, USA, and the Great Dyke of Zimbabwe (Naldrett 2011; Zientek 2012).The PGE deposits, in these intrusions, referred to as reefs, are narrow (1–3 m) PGE-rich …
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— The platinum-group element (PGE) contents of the upper portions of the Bushveld Complex were investigated with three questions in mind: (a) In natural …
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Platinum-group element (PGE) geochemistry combined with elemental geochemistry and magnetite compositions are reported for the Mesoproterozoic Zhuqing Fe-Ti-V oxide ore-bearing mafic intrusions in the western Yangtze Block, SW China. All the Zhuqing gabbros display extremely low concentrations of chalcophile elements and PGEs. The oxide-rich …
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— The first report of platinum-group minerals in magnetite-bearing gabbro, freetown layered complex, Sierra Leone: Occurrences and genesis. J. Bowles H. Prichard S. Suárez P. Fisher. Geology. 2013; Platinum-group minerals (PGM) have been located in magnetite-bearing gabbroic rocks of the Freetown Layered Complex, Sierra Leone for …
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— Olivine is replaced by serpentine, magnetite, ... Platinum group elements for twenty bulk chromitite, harzburgite, and dunite samples were analyzed using ICP-MS after Ni–sulfide fire assay. After pre-concentration, the dissolved sample was analyzed using Perkin-Elmer Sciex ELAN 9000 ICP-MS at Act Lab, Ontario, Canada. ...
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— Analytical data for the platinum-group elements (PGE) and gold on 17 samples from sulfide-mineralized and -unmineralized rocks of the lower portion of the upper zone and two samples from the main zone of the eastern Bushveld Complex are presented. Almost all samples contain less than 100 ppb total PGE, indicating that the sulfide …
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— Complex assemblages consisting of native iron + pentlandite, pentlandite + heazlewoodite + magnetite, heazlewoodite + magnetite + platinum-group minerals (PGM), and millerite ± heazlewoodite are associated with three types of altered chromites (partly altered chromite, double-rimmed chromite, and porous chromite) discovered in the …
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— A leaching process for platinum contained in a magnetite ore was studied, as an alternative process to cyanidation and aqua regia digestion. ... Three platinum group metals (PGMs), platinum (Pt), palladium (Pd), and rhodium (Rh), are key components in automotive catalytic convertors, playing a pivotal role in controlling harmful emissions. …
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Platinum group element enriched hydrothermal magnetite of the Union Bay Alaska-type ultramafic intrusion, southeast Alaska. Authors: Van Treeck, C.J. ... Magnetite veins with a formation temperature of less than 600 degrees C are surrounded by an alteration envelope of hydrous silicates that vary with temperature and contain appreciable amounts ...
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Platinum-group element (PGE) geochemistry combined with elemental geochemistry and magnetite compositions are reported for the Mesoproterozoic Zhuqing Fe–Ti–V oxide ore-bearing mafic intrusions in the western Yangtze Block, SW China. All the Zhuqing gabbros display extremely low concentrations of chalcophile elements and PGEs. The oxide-rich …
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Literature review on platinum-group minerals 2.1. Platinum-group element mineralogy 2.1.1. Introduction ... (Cabri, 1981), since magnetite can be associated with Pt-Fe alloys. Parry (1984) reported PGE values of typically less than 1 ppmw for mixtures of magnetite and ilmenite. 2.1.2.3. PGEs hosted in silicates
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Interaction of a PGE-Fe-Cl rich fluid with clinopyroxene and olivine increased the fluids pH and decreased PGE and Fe solubility depositing a PGE enriched magnetite within the …
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— The Bushveld Complex of South Africa (Fig. 1) contains the world's largest resource of platinum-group elements (Vermaak, 1995) and a large portion of the world's V and Ti resources (Goldberg et al., 1992).Most of the platinum-group element (PGE) resources are found in narrow layers, known as reefs, in the lower third of the intrusion, …
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— An enrichment in nickel (Ni) or platinum group elements (PGE) is seldom observed in ores of the iron oxide–copper–gold (IOCG) type. This phenomenon is, however, known from a few deposits and prospects in the Carajás Mineral Province, Brazil. The Ni-PGE enrichment is explained, in part, by the spatial association of the IOCG-type ores …
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— Platinum-group elements (PGE) are widely used in tracing various geological processes, such as the origin and evolution of mantle-derived silicate melts and the formation of magmatic sulfide deposits (Barnes and Ripley, 2016; Harvey and Day, 2016). ... Layered intrusions hosting giant V-Ti magnetite ore deposits, such as the Panzhihua, …
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— The concentrations of platinum-group elements (PGE) have been analyzed in primary magmatic magnetite samples from the Zhireken, Shakhtama and Aksug …
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— Magnetite from the Heifengshan and Shuangfengshan Fe deposits has similar normalized trace element spider patterns and cannot be discriminated according to these factors. However, magnetite from the Shaquanzi Fe–Cu deposit has affinity to Factor 2 with lower Mg and Al but higher Zn concentrations, indicating that the ore–forming …
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— Formation of Platinum: Magmatic Processes: The primary source of it is magmatic ore deposits, which originate from the cooling and solidification of molten rock (magma) deep within the Earth's mantle and crust. These deposits are associated with igneous rocks and are known as "platinum group element (PGE) deposits." PGEs, …
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— The concentrations of platinum-group elements (PGE) have been analyzed in primary magmatic magnetite samples from the Zhireken, Shakhtama and Aksug porphyry Cu-Mo deposits (Siberia, Russia) by laser ablation-inductively coupled plasma mass spectrometry to determine the range of PGE contents in magnetites and to check …
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— The DMS magnetite project is described by Ironveld CEO Martin Eales as being beneficial for its Ironveld Mining subsidiary in terms of reducing overall average mining costs and, in time, likely ...
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— The trace-element composition of magnetite in Ni–Cu–platinum-group element (PGE) sulfide deposits is influenced by magmatic evolution, fractional crystallization of sulfide liquid, and post-magmatic processes, and, therefore, may record ore-forming processes. The Jinchuan Ni–Cu–(PGE) sulfide deposit in NW China contains a variety of ...
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— Platinum-group minerals (PGM) have been located in magnetite-bearing gabbroic rocks of the Freetown Layered Complex, Sierra Leone for the first time.
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— These platinum-group minerals (PGMs) are commonly associated with the BMS, or magnetite coexisting with BMS in the PGE mineralization zone (Zhu et al., 2010). 4. Analytical methods. Platinum, Pd, Ir, and Ru were determined by isotope dilution (ID)-ICP-MS using an improved Carius tube technique (Qi et al., 2007).
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— 1. Introduction. Platinum-group elements (PGE) are widely used in tracing various geological processes, such as the origin and evolution of mantle-derived silicate melts and the formation of magmatic sulfide deposits (Barnes and Ripley, 2016; Harvey and Day, 2016).Magmatic sulfide deposits, including Cu-Ni-PGE deposits and PGE deposits, …
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