Mineral inclusions in Fe-Pt solid solution from the alluvial ore occurrences of the Anabar basin (northeastern Siberian Platform) |
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| Affiliation: | 1. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia;2. Almazy Anabar Open Joint-Stock Company, ul. Chernyshevskogo 6, Yakutsk, 677000, Russia;3. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia;1. Institute of Earth’s Crust, Siberian Branch of the Russian Academy of Science, ul. Lermontova 128, Irkutsk, 664033, Russia;2. Institute of Mineral Geology, Petrography, Mineralology, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 190017, Russia;1. A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia;2. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia;3. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentyeva 10, Novosibirsk, 630090, Russia;4. Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentyeva 8, Novosibirsk, 630090, Russia;5. Institute of Volcanology and Seismology, Far East Branch, Russian Academy of Sciences, Piip blvd. 9, Petropavlovsk-Kamchatskii, 683000, Russia;6. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentyeva 5, Novosibirsk, 630090, Russia;7. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentyeva 3, Novosibirsk, 630090, Russia;8. Limnological Institute, Siberian Branch, Russian Academy of Sciences, ul. Ulan-Batorskaya 3, Irkutsk, 664033, Russia;9. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia;1. Institute of Geology and Geochemistry, Uralian Branch of the Russian Academy of Sciences, per. Pochtovyi 7, Yekaterinburg, 620151, Russia;2. Granada University, Campus Fuentenueva, Granada, 18071, Spain;1. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia;2. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia |
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| Abstract: | This study is concerned with the typochemical features of heavy-concentrate platinum from diamond placers of the Mayat-Vodorazdel’nyi site in the Anabar River basin. Platinum occurs there as Fe-Pt solid solutions (ferroan platinum of Ru-Rh specialization, ~ 90%), as well as minor Pd- and Ir-ferroplatinum. Among PGE minerals, Os-Ir-Ru alloys and chengdeite are revealed. Inclusions of PGE minerals are thoroughly studied, and the scales of their spread, the composition of mineral phases, and the relations between them are determined. Ruthenium-containing high-Rh ferroplatinum bears a lot of inclusions of Rh-S composition: Rh-containing PGE thiospinels and sulfides and arsenides of Rh, Ru, and Pt. In low-Rh platinum, mineral inclusions are much scarcer and usually form other parageneses. The mineral compositions in the system Rh-S-Ru indicate to the existence of a long isomorphous series Rh3S4-Ru3S4, with the content of Ru3S4 reaching 15 at.%. |
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