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Vol. 3 (2000 year), No. 2
Balabonin N.L., Korchagin A.U., Subbotin V.V., Neradovsky Yu.N., Karpov S.M., Pakhomovsky Ya.A., Savchenko Ye.E.
The minerals of platinum metals and new data on major minerals of the Fedorovo-Pansky massif ores
The paper has presented the results of the mineralogical study of the composite low grade sulphide platinum group elements (PGE) of Cu-Ni ores of the layered Fedorovo-Pansky massif. Monosulphides Fe, Ni have a wide range of composition (metal/sulphur, Ni contents) up to the formation of the monosulphide solid solutions (Ni up to 14.1 wt.%). 95 platinum-group minerals (PGM) and unnamed phases (PGP), mainly bismutho-tellurides and tellurides of Pd, Pt, have been found in ores. The most common and widely-distributed species of the PGM are merenskyite (Pd,Pt)(Te,Bi)2; moncheite (Pt,Pd)(Te,Bi)2; kotulskite Pd(Te,Bi); braggite (Pt,Pd,Ni)S and sperrylite PtAs2. The data have been presented on the abundance grain sizes, morphology, microassosiations and composition of the PGM. All common minerals except sperrylite have a wide range of composition. The following conclusions may be drawn: a long history of PGM cristallization in different conditions; Pansky and Fedorova massives are supposed to have different magmatic sources; postore regime of massif cooling took place under chilling condition with fluid loss. The indicator role of the PGM in genetic and typification problems has been emphasized.
(in Russian, стр.26, fig. 9, tables. 11, ref 90, MS Word 95, MS Word 95 3270 Kb)
Vol. 3 (2000 year), No. 2
Balabonin N.L., Korchagin A.U., Subbotin V.V., Karpov S.M., Pakhomovsky Ya.A., Savchenko Ye.E.
The platinum group rare minerals of the low grade sulphide ores of the Fedorovo-Pansky massif
Rare minerals of the platinum group minerals (PGM) of the low grade sulphide ores of Fedorovo-Pansky massif have been described in the paper: (Au,Pd), Hg-, Au-, Sn-, Se-bearing PGM, including PGE-bearing cobaltites-gersdorfites. These minerals may be applied as indicators of ore genesis.
(in Russian, стр.6, fig. 2, tables. 4, ref 8, MS Word 95, MS Word 95 966 Kb)
Vol. 3 (2000 year), No. 2
Subbotin V.V., Korchagin A.U., Balabonin N.L., Savchenko Ye.E., Karpov S.M., Kulakov A.N.
Mineral composition of new shows of platinum-metal mineralization in the eastern part of the Panskaya tundra massif
In the eastern part of the Panskaya tundra massif at Peshempakh and Sungjok sites new shows of platinum-metal ores of a low-sulphide type have been found out. Mineralization is characterized by the high abundance of PGE and Au sum (2 - 24 ppm). The Pd/Pt ratio ranges from 1.2 to 6.7. The Ni abundance varies from 0.06 to 0.26; the Cu abundance - from 0.06 to 0.39 wt%. The main ore minerals are pyrrhotite, chalkopyrite, pentlandite, violarite, pyrite, PGE-bearing cobaltite. Correspondingly to the frequency of occurence and exhalation sizes, kotulskite, merenskyite, moncheite, sperrylite, cooperite and electrum prevail among the noble metal minerals. Morphological features and granulometric composition of minerals have been studied using the optical and electron microscopy methods, and their chemical composition has been studied using the electron microprobe analysis. Compared to other parts of the intrusion an increased prevalence of PGE-bearing sulphoarsenites Co and Ni, electrum and isoferroplatinum has been established. Looking at the global classical analogues the studied mineralization is close to the Great Dyke noble metal mineralization. The positive mineralogical prerequisites of the complex industrial mineralization have allowed to conclude that the eastern part of the Panskaya tundra massif is prospective as a raw material source of PGE, Au, Cu, Ni, Co.
(in Russian, стр.10, fig. 8, tables. 8, ref 7, MS Word 95, MS Word 95 1560 Kb)
Vol. 15 (2012 year), No. 2
Mitrofanov F.P., Malitch K.N., Bayanova T.B., Korchagin A.U., Zhirov D.V.
Comparison of East-Scandinavian and Norilsk large plume mafic igneous provinces of PGE ores
The paper is devoted to issues related to the formation of large low-sulfide PGE ore provinces – East-Scandinavian and Norilsk. Basing multidisciplinary data it has been inferred that East-Scandinavian province is being attributed to an intracratonic type without subduction and crust contamination (with Pt-Pd low-sulfide mineralization to predominate). Norilsk province belongs to pericratonic one with PGE – Ci-Ni rich sulfide mineralization to prevail. It has been shown that the main ore provinces PGE metals essentially formed at later stage of existence and initial break-up of supercontinents – predominantly 2.7-2.5 Ga and 1.8-1.7 Ga as a unique case in the Late Paleozoic (Norilsk). For the first time long duration (dozens of Ma) and multistage nature of ore-magmatic system evolution for the East-Scandinavian mafic Large Igneous Province have been demonstrated and this has made it possible to propose it for Norilsk. Comparison of low-sulfide PGE and sulfide Cu-Ni (with PGE) potential of the mafic intrusions is possible using a series of geological, geophysical and geochronological (U-Pb on zircon and baddeleyite, Sm-Nd on rock-forming and sulfides minerals) and isotope geochemical (?Nd(T), TDm, ISr, 3He/4He) indicators.
(in English, стр.15, fig. 8, tables. 1, ref 41, Adobe PDF, Adobe PDF 0 Kb)