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

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 consi...

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Bibliographic Details
Published in:Doklady earth sciences 2024-05, Vol.516 (1), p.811-818
Main Authors: Ivanov, K. S., Vakhrusheva, N. V., Puchkov, V. N., Shiryaev, P. B., Farrakhova, N. N., Bogomolova, A. E.
Format: Article
Language:English
Subjects:
Chromium
Composition
Earth and Environmental Science
Earth Sciences
Geology
Massifs
Olivine
Rocks
Silicates
Ultramafic materials
Ultramafic rocks
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Summary: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.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X24601111