Abstract
The Precambrian Belomorian mobile belt located between the Karelian craton and the Lapland–Umba granulite belt contains large amount of small rootless mafic–ultramafic intrusions, which are dispersed over a large area and distinguished as the Belomorian drusite (coronite) complex. U-Pb dating of magmatic zircon and metamorphic rutile from the drusite body on Vorony Island showed that it was crystallized at 2460 ± 11 Ma and metamorphosed at 1775 ± 45 Ma. Petrographic and geochemical data confirm that the parental magmas of the drusites belong to the siliceous high-magnesian (boninite-like) series, which also was responsible for the formation of large layered plutons in stable domains of the Baltic Shield.
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Original Russian Text © M.K. Sukhanov, F.P. Mitrofanov, T.B. Bayanova, A.V. Chistyakov, 2016, published in Petrologiya, 2016, Vol. 24, No. 1, pp. 83–92.
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Sukhanov, M.K., Mitrofanov, F.P., Bayanova, T.B. et al. U-Pb isotopic study of the gabbronorite–anorthosite drusite (coronite) body of Vorony Island (Kandalaksha Archipelago, the White Sea). Petrology 24, 75–83 (2016). https://doi.org/10.1134/S0869591116010069
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DOI: https://doi.org/10.1134/S0869591116010069