Results 271 to 280 of about 5,495 (300)

Platinum-group minerals in alpine chromitites from southwestern Oregon

Economic Geology, 1984
Electron 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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Mineralogy of platinum-group minerals in the Witwatersrand, South Africa

Economic Geology, 1976
Approximately 80 percent of the platinum-group mineral grains in the Precambrian Witwatersrand conglomerate reefs are (Ir, Os, Ru) alloys. Osmium, iridosmine, osmiridium, and iridium are most abundant; rutheniridosmine, ruthenosmiridium, and ruthenian iridium are less abundant. Zoned grains are common, with Os-rich cores enclosed by (Ir, Pt)-rich outer
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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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Platinum-Group Minerals from the Durance River Alluvium, France

Mineralogy and Petrology, 1990
Platinum-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, M. Ohnenstetterl, M. Fischer, J. Amoss�   +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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Genesis of Platinum Group Element Minerals in Ultrabasites Unrelated to Ophiolites

Proceedings, 2008
Россыпи рек Ко в Восточном Саяне и Таенза в Горной Шории характеризуются преобладанием Os-Ir-Ru сплавов над другими МПГ, также, как и в россыпях, связанных с офиолитовыми гипербазитами, но по типоморфным признакам они отличаются от последних, характеризуя иные условия образования, другой формационный тип коренного источника.
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Platinum-group Minerals from SE Germany

2022
T.L. Evstigneeva, R. Ramdohr, G. Steyer
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GRAPHS AS A KEY TO ANALYSIS OF PLATINUM GROUP MINERALS STRUCTURES

Proceedings of the Annual Meeting of the Russian Mineralogical Society combined with the Fedorov Session 2023, 2023
O.V. Karimova, A.A. Mezhueva
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Platinum-Group Minerals

2021
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Glossary of platinum-group minerals

Economic Geology, 1976
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