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Electronic Structure of Platinum-Group Minerals: Prediction of Semiconductor Band Gaps
Molecular Simulation, 1999Abstract We report first-principle electronic structure calculations of the three representative minerals of the platinum group: cooperite (PtS), braggite (PdPt3S4) and sperrylite (PtAs2) using the Tight-Binding Linear Muffin Tin Orbital (TB-LMTO) technique.
D. Nguyen-Manh +3 more
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Platinum Group Elements Mineralization
2020Platinum group element (PGE) mineralization is associated with ultramafic and mafic rocks. There are three major types of PGE mineralization in Mongolia. The most common is (1) PGE mineralization related to ophiolites and includes podiform chromite, (2) PGE in layered gabbro intrusion, and (3) PGE-Au placer.
Baasandorj Altanzul, Ochir Gerel
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Platinum-Group Minerals from a Hydrothermal Environment
Economic Geology, 1974Ore microscopy, paragenesis, two-temperature hydrothermal copper deposit, optical and physical properties, no X-ray data obtained; Messina, South Africa; see also this Bibliography, Cabri and Pickwick ...
P. Mihalik +2 more
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Revue Roumaine de Géologie / Romanian Journal of Geology, 2023
Platinum Group Elements (PGEs) are among the rarest metals in the world and are also considered as critical metals/minerals. Their economically important occurrences are limited to orthomagmatic deposits, porphyry-type hydrothermal deposits, alluvial accumulations (placers), and residual-type deposits.
SORIN SILVIU UDUBAȘA +4 more
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Platinum Group Elements (PGEs) are among the rarest metals in the world and are also considered as critical metals/minerals. Their economically important occurrences are limited to orthomagmatic deposits, porphyry-type hydrothermal deposits, alluvial accumulations (placers), and residual-type deposits.
SORIN SILVIU UDUBAȘA +4 more
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Platinum-group minerals from the Troodos ophiolite, Cyprus
Mineralogy and Petrology, 1990Platinum-group minerals have been identified in chromitites from the Troodos ophiolitic complex of Cyprus. The host chromitites occur as podiform bodies within the basal harzburgite of the ophiolite, as occasional discontinuous layers in the dunites at the base of the overlying cumulate sequence and rarely as minor schlieren in clinopyroxene dunites at
B McElduff, E. F. Stumpfl
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Platinum-group minerals in Tasmania
Economic Geology, 1981Platinum-group minerals in Tasmania occur mostly in placer deposits and are composed mainly of iridosmine and rutheniridosmine. Platinum-rich alloys are rare. Silicate inclusions in the metals include olivine (Fo (sub 94-89) ), enstatite, and nonstoichiometric pyroxene rich in Ca, Mg, and Al.
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Platinum-group minerals within the Ballantrae Complex, SW Scotland
Scottish Journal of Geology, 2004Synopsis Platinum-group minerals (PGM) are present within the chromitites of the northern serpentinite belt (Pinbain Bridge area) of the ophiolitic Ballantrae Complex. A relatively uncommon but moderately diverse PGM assemblage is dominated by small (<10 μm) Ir-, Os-, or Ru-bearing phases including laurite (RuS 2
M. R. Power, D. Pirrie
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Platinum-group minerals in the Hitura nickel deposit, Finland
Economic Geology, 1976The northern part of the Hitura serpentinite-peridotite body contains Ni-Cu mineralization whose grade is highest in the contact zone. Pt metals average 0.027 g/ton Pt and 0.048 g/ton Pd in the ultramafic body. A detailed microscopic, microprobe, and analytical study of the Pt metals and minerals reveals that sperrylite is the only independent Pt ...
T. A. Hakli +3 more
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Platinum-group minerals in alpine chromitites from southwestern Oregon
Economic Geology, 1984Electron microprobe and scanning electron microscopy. The platinum-group minerals found in the chromitites are laurite, porous Ru-rich alloys, Os-Ir- and Pt-rich alloys with highly variable compositions, an Ir-Cu-rich sulfide, a Pt arsenide, and three relatively rare platinum-group sulfides.
Harlan W. Stockman, Paul F. Hlava
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Platinum-Group Minerals from the Durance River Alluvium, France
Mineralogy and Petrology, 1990Platinum-group minerals were discovered, during gold recovery, in the Durance river alluvium, near Peyrolles (Bouches-du-Rhone). The PGM grains (average size 130 microns) are strongly flattened (average thickness 64 microns). The PGM concentrate consists primarily of (Pt, Fe) alloys (92%), (Os, Ir, Ru) alloys (3.5%), and native gold and (Au, Cu, Ag ...
Z. Johan +3 more
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