The Association of Platinum-Group Minerals in Placers of the Pustaya River, Kamchatka, Russia

Tolstykh, Nadezhda D.; Sidorov, Evgeny G.; Laajoki, K.; Krivenko, Aleksandr P.; Podlipskiy, Maksim

doi:10.2113/gscanmin.38.5.1251

Cited by 42 publications

(18 citation statements)

References 12 publications

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“…The amount of the tetraferroplatinum group minerals regularly decreases from the lode source to the most distant placers, where the rims composed of these minerals are absent. Table 1 for isoferroplatinum (No 5-6, 9-11, 13-16) and ferroan platinum (No 20), in Table 2 for tetraferroplatinum-tulameenite (No 27-31) and in Table 3 for osmium (No 19,20). Isfisoferroplatinum, PtFe-tetraferroplatinum Tul-tulameenite, Os-osmium, Ir-iridium, and Chrchromite.…”

Section: Pt-fe Alloysmentioning

confidence: 99%

“…[27][28][29][30][31] and in Table 3 for osmium (No. 19,20). Isf-isoferroplatinum, PtFe-tetraferroplatinum Tul-tulameenite, Os-osmium, Ir-iridium, and Chr-chromite.…”

Section: Pt-fe Alloysmentioning

confidence: 99%

“…Furthermore, the changes in the platinum-group minerals occurring during their transport from a lode source to a placer were not studied in detail. Despite the significant amount of work devoted to the Koryak-Kamchatka region, as well as the Bushveld complex and the Great Dyke (South Africa), where the formation of the platinum placers [18][19][20][21][22][23][24] was investigated in detail, similar studies of the Ural Platinum Belt placers have not been conducted yet.…”

Section: Introductionmentioning

confidence: 99%

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Platinum-Group Minerals of Pt-Placer Deposits Associated with the Svetloborsky Ural-Alaskan Type Massif, Middle Urals, Russia

et al. 2019

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The alteration of platinum group minerals (PGM) of eluval, proximal, and distal placers associated with the Ural-Alaskan type clinopyroxenite-dunite massifs were studied. The Isovsko-Turinskaya placer system is unique regarding its size, and was chosen as research object as it is PGM-bearing for more than 70 km from its lode source, the Ural-Alaskan type Svetloborsky massif, Middle Urals. Lode chromite-platinum ore zones located in the Southern part of the dunite "core" of the Svetloborsky massif are considered as the PGM lode source. For the studies, PGM concentrates were prepared from the heavy concentrates which were sampled at different distances from the lode source. Eluvial placers are situated directly above the ore zones, and the PGM transport distance does not exceed 10 m. Travyanistyi proximal placer is considered as an example of alluvial ravine placer with the PGM transport distance from 0.5 to 2.5 km. The Glubokinskoe distal placer located in the vicinity of the Is settlement are chosen as the object with the longest PGM transport distance (30-35 km from the lode source). Pt-Fe alloys, and in particular, isoferroplatinum prevail in the lode ores and placers with different PGM transport distance. In some cases, isoferroplatinum is substituted by tetraferroplatinum and tulameenite in the grain marginal parts. Os-Ir-(Ru) alloys, erlichmanite, laurite, kashinite, bowieite, and Ir-Rh thiospinels are found as inclusions in Pt-Fe minerals. As a result of the study, it was found that the greatest contribution to the formation of the placer objects is made by the erosion of chromite-platinum mineralized zones in dunites. At a distance of more than 10 km, the degree of PGM mechanical attrition becomes significant, and the morphological features, characteristic of lode platinum, are practically not preserved. One of the signs of the significant PGM transport distance in the placers is the absence of rims composed of the tetraferroplatinum group minerals around primary Pt-Fez alloys. The sie of the nuggets decreases with the increasing transport distance. The composition of isoferroplatinum from the placers and lode chromite-platinum ore zones are geochemically similar.

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Section: Pt-fe Alloysmentioning

confidence: 99%

“…[27][28][29][30][31] and in Table 3 for osmium (No. 19,20). Isf-isoferroplatinum, PtFe-tetraferroplatinum Tul-tulameenite, Os-osmium, Ir-iridium, and Chr-chromite.…”

Section: Pt-fe Alloysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Platinum-Group Minerals of Pt-Placer Deposits Associated with the Svetloborsky Ural-Alaskan Type Massif, Middle Urals, Russia

et al. 2019

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“…However, elevated levels of Cu (1.9 wt.% or 0.6 apfu) are present, in common with composition of the type-locality sample of vasilite. Tolstykh et al (2000) described a phase, also Cu-bearing and poor in Te, related to vasilite from the Pustaya River placer deposit, associated with an Alaskan-type complex in Kamchatka, Russia.…”

Section: Isoferroplatinum Pt 3 Fe (Or Fe-rich Platinum)mentioning

confidence: 99%

“…Besides, the following species of Rh-Ir sulfides were first discovered in association with Alaskan-type complexes: bowieite in Alaska (Desborough & Criddle 1984), and kashinite and miassite in the Urals (Begizov et al 1985, Britvin et al 2001. Phases corresponding to vasilite in composition were reported in association with Pt-Fe alloy from Alaskan-type complexes of the Kamchatka-Koryak belt (Rudashevsky & Zhdanov 1983, Tolstykh et al 2000. The origin of the type-locality vasilite at Novoseltsi, Bulgaria, is not well understood (Atanasov 1990).…”

Section: Potential Provenancementioning

confidence: 99%

Platinum-Group Minerals From a Placer Deposit in Burwash Creek, Kluane Area, Yukon Territory, Canada

Fedortchouk¹,

LeBarge²,

Barkov³

et al. 2010

The Canadian Mineralogist

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Five placer grains of Pt-Fe alloy, ca. 0.5 to 2 mm, roundish in shape, and hitherto unconfirmed from this locality, were recovered from a placer deposit in Burwash Creek, Kluane area, Yukon. Our results of multiple electron-microprobe analyses (EMP) display the presence of elevated levels of Pd (0.49-5.84, mean 2.38 wt.%), Rh (1.05-1.94, mean 1.50 wt.%), Ir (<0.2 to 6.91, mean 1.33 wt.%), and Cu (0.17-1.19, mean 0.62 wt.%) in these alloy grains; a compositional series is observed, in which values of SPGE/(Fe + Cu + Ni) vary from 3.0 to 5.7. Concentrations of Ru are invariably low (<0.03 to 0.11 wt.%) in this series. These grains of Pt-Fe alloy host micro-inclusions of various species of platinum-group minerals, PGM, diopside Mg 37.5-48.0 Fe 4.9-16.8 , mg# = 100Mg/(Mg + Fe 2+ ) in the range 69.0-90.7], plagioclase (Ab 57.5-60 An 35.1-39.9 Or 2.6-4.8 ), and sodic-calcic amphiboles (0.6 and 1.1 Na apfu), some of which are rich in Cl (0.72 and 1.17 wt.%, or 0.17 and 0.36 Cl apfu, respectively). The analyzed inclusions of PGM are members of the bowieite Rh 2 S 3 -kashinite Ir 2 S 3 solid-solution series, miassite (Rh,Pt,Pd) 17 S 15 , cooperite PtS, isoferroplatinum Pt 3 Fe (or Fe-rich platinum), vasilite (Pd,Cu,Pt) 16 S 7 , keithconnite Pd 20 Te 7 , an unusual Pt-Pd-Ni-Cu alloy (i.e., Pd-rich platinum: Pt 47.7-52.8 Pd 29.3-37.9 Ni 6.3-8.0 Cu 6.1-7.5 ), and a sulfotelluride of Pd, Pd 11 Te 2 S 2 (?), which may represent a new isomertieite-type compound. The trace-element composition of the silicate melt inclusions determined using laser-ablation ICP-MS shows a notable enrichment in large-ion lithophile elements. We infer that the reported association of PGM and the trace-element composition of silicate melt inclusions observed at Burwash Creek probably correspond to an Alaskan-Uralian-type mineralization; considered less likely is a relation with a Triassic ultramafic-mafic complex (sill-like) of so-called Kluane-type, also developed in the placer area.

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Platinum Assemblage of Matysken River (Koryak Highlands, Russia): Key Properties and Relation with Bedrock Source

Kutyrev

Sidorov

2019

Springer Proceedings in Earth and Environmental Sciences

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The Association of Platinum-Group Minerals in Placers of the Pustaya River, Kamchatka, Russia

Cited by 42 publications

References 12 publications

Platinum-Group Minerals of Pt-Placer Deposits Associated with the Svetloborsky Ural-Alaskan Type Massif, Middle Urals, Russia

Platinum-Group Minerals of Pt-Placer Deposits Associated with the Svetloborsky Ural-Alaskan Type Massif, Middle Urals, Russia

Platinum-Group Minerals From a Placer Deposit in Burwash Creek, Kluane Area, Yukon Territory, Canada

Platinum Assemblage of Matysken River (Koryak Highlands, Russia): Key Properties and Relation with Bedrock Source

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