Platinum-group minerals from Onverwacht; III, Genkinite, (Pt (Pt,Pd) 4 Sb 3, a new mineral The Canadian Mineralogist. Tulameenite, a new platinum-iron-copper mineral from placers in the Tulameen River area, British Columbia The Canadian Mineralogist. Related Book Content. The Northern Limb of the Bushveld Complex: A New Economic Frontier ...

Additional proportions of platinum-group elements are hosted by Fe-hydroxides and secondary hydrosilicates (e.g., serpentine group minerals and chlorite). In supergene ores, only low recovery rates (ca. 40%) are achieved due to the polymodal and complex platinum-group element distribution. To achieve higher recovery rates for the …

The platinum-group minerals are an intimate part of the crystallization history of the base metal sulfides, and their paragenetic sequence, as determined from a textural interpretation, conforms to the known geochemical character of the platinum-group elements, especially with regard to the fractionation of palladium and platinum. ...

Department of Geosciences and Geological and Petroleum Engineering, Missouri University of Science & Technology, 334 McNutt Hall, 1400 N. Bishop Avenue, Rolla, Missouri 65409-1330, USA ... 18 samples from chromitite seams throughout this intrusion are investigated for their whole-rock platinum group element (PGE) contents, …

Due to their "iron-loving" properties, platinum-group elements (PGE) are expected to be stored in the Earth's core. Although very low, at a few parts per billion, PGE concentrations measured in mantle-derived rocks are too high to be in chemical equilibrium with the core. The "late veneer" model offers the best explanation for this ...

Reddy and Evans acknowledge support from TiGeR (The Institute of Geoscience Research) at Curtin University and Australian Research Council Discovery grants DP210101866 and DP210102625. ... Values in parentheses are mass fraction of platinum group elements (PGEs) in platinum group minerals (PGMs) (0.1, 0.5, or 1) …

Platinum group mineral (PGM) assemblages in the Platreef at Sandsloot, northern Bushveld Complex, in a variety of lithologies reveal a complex multi-stage mineralization …

Platinum-Group-Element (PGE) Placer Deposits in British Columbia: Characterization and Implications for PGE Potential. By Victor M. Levson, David J. Mate and Travis Ferbey. …

Low-sulfide platinum group element (PGE) mineralization of the Norilsk-type intrusions is located within the Upper Gabbroic Series, which comprises rocks heterogeneous in texture and composition. The highest grade of 10 to 50 g/t PGEs is confined primarily to chromitiferous taxitic gabbrodolerite, which forms irregular lens- and …

CHAPTER 11: PLATINUM GROUP ELEMENTS EXPLORATION: ECONOMIC CONSIDERATIONS AND GEOLOGICAL CRITERIA Author(s) Tony Green Tony Green Falconbridge Limited, Suite 800, Queen's Quay Terminal, 207 Queen's Quay West, Toronto, Ontario, M5J 1A7, Canada E-mail: [email protected]. …

Abstract. In a cooling solar nebula, five of the six platinum-group elements (PGE) condense as refractory-metal alloys at temperatures above the condensation of Fe-Ni metal. Non-refractory Pd condenses in solid solution with Fe-Ni. Such refractory alloys are preserved in some meteorites, although they are often highly altered.

The UG-2 chromitite layer, with its elevated platinum-group element content, is a key marker horizon in the eastern and western limbs of the Bushveld Igneous Complex and the largest platinum-group element chromite-hosted resource of its kind in the world. In contrast, much less is known about its stratigraphic equivalent in the …

Nature Geoscience - Mineralization of platinum-group elements in mafic intrusions occurs due to repeated self-intrusion of magma, according to strontium isotope heterogeneities preserved in the ...

CHEMICAL GEOLOGY INCLUDING - ISOTOPE GEOSCIENCE ELSEVIER Chemical Geology 136 (1997) 181-204 The petrogenesis and platinum-group element geochemistry of the Newer Volcanic Province, Victoria, Australia Derek C. Vogel a, *, Reid R. Keays b a School of Earth Sciences, University of Melbourne, Parkville, Vic. …

Ontario Geoscience Laboratories, Sudbury, Ontario, Canada P3E 6B5 ... Platinum-group elements (PGE) are strongly chalcophile and are therefore potentially sensitive indicators of processes involving segregation and accumulation of sulfide melts from silicate magmas. Over 500 new high-precision PGE data for komatiites and …

Geochemistry and mineralogy of platinum-group elements (PGE) in the chromite ores of the Ray-Iz massif have been studied by Volchenko, 1990, Gurskaya, …

The identification of minerals that occur as tiny and rare phases such as most of the natural platinum-group minerals (PGM) is a challenging target. The main reason for that resides in their size (generally less than 10 micrometres) and mode of occurrence ( i.e. polyphasic aggregates) that make problematic the identification by standard X-ray ...

Platinum-group elements (PGE) have shown to have a strong affinity for arsenide melts, but little is known about their partitioning behavior between arsenide and sulfide melts. In this study, we experimentally determine the partition coefficients of PGE (Pt, Pd, Ir, Ru, and Os) between both types of melt in As-saturated sulfide systems …

Significant differences in the proportions of platinum-group elements within a particular layer are only evident on a regional scale.The platinum-group minerals of the middle group of chromitite layers in the Marikana area of the western Bushveld are mainly sulfides and arsenides. Laurite is the most common platinum-group mineral and is mostly ...

Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, D-30655 Hannover, Germany ... The present work focuses on the description of the assemblage of detrital platinum-group minerals (PGM) found in rivers draining the Great Dyke. This PGM assemblage distinctly contrasts with the suite of PGM in the pristine, …

Nevertheless, sperrylite is the dominant platinum-group mineral recovered in gravity concentrates.Discrete palladium minerals are most abundant in stringers of sulfide in the footwall to the ore, in crosscutting sulfide veins, or in reaction zones associated with hydrothermal veins and porphyries. Within the massive and matrix ores, coarse ...

Total contents of platinum-group elements (PGE) in different deposits range from 87 to 520 ppb, with an average of 199 ppb. Values normalized to chondrite (CI) show negatively sloping PGE patterns with slight positive Ru and Pd anomalies. Primary solid inclusions of silicates consist of olivine, amphibole, phlogopite and rare clinopyroxene ...

The presence of interelements due to sample complexity can produce significant effects on the quantitative determination of platinum group metals (PGMs) by using inductively coupled plasma optical emission spectrometry (ICP OES). However, research on such an important issue is still limited and poses a consi

The Upper Group 2 (UG2) chromitite occurs in the Upper Critical Zone and is the single largest PGE resource on Earth, with Pt grading at ~ 2.7 ppm and containing a combined 6,636 × 10 6 tons of measured, indicated and inferred ore (from D. Causey, quoted in Zientek 2012). The UG2 chromitite is broadly stratiform and is approximately 1 m thick ...

Although placer deposits hosting platinum group elements (PGEs) have been found in association with Ural-Alaskan–type complexes in several locations around the world, these ultramafic complexes have traditionally been viewed as sulfide-poor systems and therefore unlikely hosts of economic Ni-Cu sulfide deposits. Sulfide mineralization in …

The Platinum Group Element Deposits: Classification and Genesis | Geoscience Canada. Volume 14, Number 3 (1987) Articles. Ore Deposit Models #12. …

Biological role in the transformation of platinum-group mineral grains | Nature Geoscience. Letter. Published: 21 March 2016. …