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190Pt–4He age of PGE ores in the Alkaline–Ultramafic Kondyor Massif (Khabarovsk District, Russia)

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Abstract

A new 190Pt–4He method for dating isoferroplatinum has been developed at the Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences. Here we publish the first results of dating of isoferroplatinum from the main mineralogical and geochemical types of PGE mineralization in dunite. The obtained 190Pt–4He age of isoferroplatinum is 129 ± 6 Ma. The gained 190Pt–4He age of isoferroplatinum specimens of different genesis (magmatic, fluid–metamorphogenic, and metasomatic) from the Kondyor Massif indicates that the PGM mineralization took place synchronously and successively with evolution of primarily picrite, followed by subalkaline and alkaline melts of the Mesozoic tectonic–magmatic activation of the Aldan Shield.

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Authors and Affiliations

  1. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia

    A. G. Mochalov

  2. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetny per. 35, Moscow, 119017, Russia

    O. V. Yakubovich & N. S. Bortnikov

Authors
  1. A. G. Mochalov
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  2. O. V. Yakubovich
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  3. N. S. Bortnikov
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Correspondence to A. G. Mochalov.

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Original Russian Text © A.G. Mochalov, O.V. Yakubovich, N.S. Bortnikov, 2016, published in Doklady Akademii Nauk, 2016, Vol. 469, No. 5, pp. 602–606.

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Mochalov, A.G., Yakubovich, O.V. & Bortnikov, N.S. 190Pt–4He age of PGE ores in the Alkaline–Ultramafic Kondyor Massif (Khabarovsk District, Russia). Dokl. Earth Sc. 469, 846–850 (2016). https://doi.org/10.1134/S1028334X16080134

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  • DOI: https://doi.org/10.1134/S1028334X16080134

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