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Unserpentinized Harzburgites of the Voikar–Synya Massif in the Polar Urals as the Initial Chromium Source for the Deposit Formation

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Abstract

Composition and age of unserpentinized harzburgites found as boudins and relict bodies in the Voikar–Synya massif in the olivine–antigorite fields have been studied. Rock and mineral structure and composition, as well as REE distribution and Sm–Nd absolute dating (≈2330 Ma) make it possible to consider these unserpentinized harzburgites as mantle fragments and the earliest ultramafic rocks of the Voikar–Synya massif. Silicates of these harzburgites are characterized by higher chromium which turns into chrome spinellide in different subsequent processes. Based on the data obtained, the resources of chromium mobilized during the transformation of primary ultramafic rocks have been evaluated.

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ACKNOWLEDGMENTS

We thank Doctors of Geological and Mineralogical Sciences A.B. Makeev and S.A. Silant’ev for discussion of the paper and comments made it possible to improve it.

Funding

The study was supported by the Russian Science Foundation (grant no. 22-17-00027, https://rscf.ru/project/22-17-00027/) and the state budget project of the Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences (project no. 123011800014-3).

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Authors and Affiliations

  1. Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, 620016, Yekaterinburg, Russia

    K. S. Ivanov, N. V. Vakhrusheva,  V. N. Puchkov, P. B. Shiryaev, N. N. Farrakhova & A. E. Bogomolova

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  1. K. S. Ivanov
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  2. N. V. Vakhrusheva
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  3. V. N. Puchkov
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  4. P. B. Shiryaev
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  5. N. N. Farrakhova
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  6. A. E. Bogomolova
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Corresponding author

Correspondence to P. B. Shiryaev.

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Translated by E. Maslennikova

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Ivanov, K.S., Vakhrusheva, N.V., Puchkov, V.N. et al. Unserpentinized Harzburgites of the Voikar–Synya Massif in the Polar Urals as the Initial Chromium Source for the Deposit Formation. Dokl. Earth Sc. (2024). https://doi.org/10.1134/S1028334X24601111

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  • DOI: https://doi.org/10.1134/S1028334X24601111

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