Results 221 to 230 of about 4,263 (259)

The development of platinum-group minerals in laterites

Economic Geology, 1986
Consideration of chloride complexes with the platinum-group elements (Fuchs and Rose, 1974; Westland, 1981) has shown that they can enter into solution at low temperatures under acid conditions with a high Eh. Complexes may also be formed with other ligand ions or soil colloids under similar conditions.
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On the Management of Gangue Minerals in the Flotation of Platinum Group Minerals

Mining, Metallurgy & Exploration, 2018
The Bushveld Complex of South Africa contains almost 90% of the world’s reserves of platinum group minerals (PGMs). In the flotation of PGMs, there are significant challenges arising from the need to treat ever-decreasing grades of the relevant ore deposits.
Cyril O’Connor, Jenny Wiese, Kirsten Corin, Belinda McFadzean   +3 more
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Biological role in the transformation of platinum-group mineral grains

Nature Geoscience, 2016
Platinum-group elements are strategically important metals. Finding new deposits is becoming increasingly difficult owing to our limited understanding of the processes that affect their mobility in surface environments. Microorganisms have been shown to promote the mobility of metals around ore deposits.
Reith, F., Zammit, C., Shar, S., Etschmann, B., Bottrill, R., Southam, G., Ta, C., Kilburn, M., Oberthür, T., Ball, A., Brugger, J.   +10 more
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Trace elements in platinum group minerals studied using nuclear microscopy

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1994
A combination of μ-PIXE and μ-RBS has been used to study concentrations and distributions of trace elements in platinum group minerals from eluvial and alluvial deposits from the western seaboard of North America. Thirteen of the pure element standards, used in the EPMA investigation, were first analysed by μ-PIXE. These analyses were used to establish
Tamana, Hardeep, Criddle, Alan, Grime, Geoff, Vaughan, David, Spratt, John   +4 more
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Platinum‐group element mineralization in the Suhanko‐Konttijärvi intrusion, Finland

Australian Journal of Earth Sciences, 1992
Igneous activity of ca 2440 Ma in the Suhanko‐Konttijarvi area began with the formation of pre‐intrusion dykes followed by the intrusion of the Suhanko‐Konttijarvi intrusion proper. The two magma pulses differed from each other in their chemical composition, the former being clearly richer in chromium and magnesium and interpreted as a boninitic‐type ...
M. J. Iljina, T. T. Alapieti, B. M. McElduff   +2 more
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Micro-PIXE analysis of platinum group minerals from placer deposits

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1993
Micro-PIXE and EPMA analyses of platinum-group minerals from placer deposits are being used in an attempt to determine whether the PGM are derived from ultramafic rocks by weathering, or formed directly in the placer by chemical accretion. Initial results from this combined study pin-point the complementary nature of the two techniques and demonstrate ...
Criddle, Alan J., Tamana, Hardeep, Spratt, John, Reeson, Karen J., Vaughan, David, Grime, Geoff   +5 more
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Compositional variations and reflectance of the common platinum-group minerals

Mineralogy and Petrology, 1987
A detailed study of the compositional variations of 22 different platinum-group minerals, of Os-Ir-Ru- and Pt-Fe alloys, Pt-Pd- and Ru-Os-Ir sulfides, RhIr-Pt sulfarsenides and Pd-Pt tellurides from various deposits resulted in verification of extensive solid solution series and element substitution within different mineral groups.
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Platinum-group minerals in chromite seams of the Stillwater Complex, Montana

Economic Geology, 1986
Platinum-group minerals are present as inclusions in both disseminated and massive chromite but are modally more abundant in massive chromite, in the ultramafic zone of the Stillwater Complex. They are small, generally less than 20 mu in diameter and characterized by euhedral and subhedral habits.
Raymond W. Talkington, Bruce R. Lipin
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First find of nephrite with accessory minerals of the platinum group

Doklady Earth Sciences, 2017
The relic minerals of the platinum group (MPG) were found for the first time in nephrite of tremolite–diopside composition associated genetically with the boninite dike of the Gorlyk-Gol deposit. This latter is confined to a segment of the zone of serpentinite melange in the southern part of the Ospinsko–Kitoi ultrabasite massif in the East Sayan ...
A. V. Tatarinov, L. I. Yalovik, S. V. Kanakin, A. Yu. Zyablitsev   +3 more
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Platinum-group minerals in the Jinchuan complex, China

2010
Platinum-group elements (PGE) and minerals (PGM), most commonly froodite (PdBi2), michenerite (PdTeBi), padrnaite (PdBiSe), sperrylite (PtAsz) and irarsite (IrAsS), have been analysed from the Jinchuan Ni-Cu-PGE sulphide deposit in the south western margin of the North China Craton in China.
Zhou, MF, Wang, CY, McDonald, I, Fisher, PC, Prichard, HM   +4 more
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