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PGM in chromite ore of the Sopcheozero deposit, Kola Peninsula

  • Minerals and Parageneses of Minerals
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Abstract

The Sopcheozero chromite deposit is hosted in dunite of the Monchegorsk layered intrusion as a sheetlike body of disseminated ore with a chromite grade varying from 20 to 60%. The total PGM content in the ore attains 0.5–0.8 g/t. The composition of host rocks varies from plagioclase peridotite to dunite, but PGM were found only in chromite-bearing dunite. PGM inclusions were detected in the interstices of chromite and olivine grains and within grains themselves. The data obtained confirm the known tendency toward variation in PGM composition with increasing sulfur and light PGE contents in the residual magmatic melt. The first particles of refractory Ir, Os, and Ru intermetallides appeared at the final stage of olivine crystallization, whereas laurite (Ru,Os,Ir)S2 and pentlandite (Fe,Ni)9S8 were formed at the final stage of chromite crystallization, when the sulfur concentration in the residual melt became sufficient.

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Authors and Affiliations

  1. Geological Institute, Kola Scientific Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184200, Russia

    Yu. N. Neradovsky & E. E. Savchenko

Authors
  1. Yu. N. Neradovsky
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  2. E. E. Savchenko
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Correspondence to Yu. N. Neradovsky.

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Original Russian Text © Yu.N. Neradovsky, E.E. Savchenko, 2008, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2008, Pt CXXXVII, No. 2, pp. 59–63.

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Neradovsky, Y.N., Savchenko, E.E. PGM in chromite ore of the Sopcheozero deposit, Kola Peninsula. Geol. Ore Deposits 50, 746–748 (2008). https://doi.org/10.1134/S1075701508080102

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  • DOI: https://doi.org/10.1134/S1075701508080102

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