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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)