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Correlation of High-Calcium Silica-Undersaturated Complex of the Maymecha–Kotuy Province with Siberian Flood Basalts: New Age Data on the Kugda Massif (Polar Siberia)

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Abstract—Perovskite crystals from the ore-bearing olivinite and phoscorite of the Kugda massif were analyzed by LA-ICP-MS. Age obtained for the alkaline rocks of the Kugda massif is 257 ± 6 Ma. This implies that the Kugda massif was formed simultaneously with the Siberian flood basalts and Guli Massif (250 ± 9 Ma), which is the largest and highly differentiated pluton in the Maymecha–Kotuy Province. The simultaneous formation of the melilite-bearing Kugda Complex, Siberian flood basalts, and Guli Massif suggests the possible genetic relation of these rocks.

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Funding

This work was financially supported by the Presidium of the Russian Academy of Sciences (project I.48P no. 0137-2018-0039) and Russian Foundation for Basic Research (project no. 17-05-01163).

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Authors and Affiliations

  1. Vernadsky Institute of Geochemistry and Analytical Chemistry, ul. Kosygina, 19, 119991, Moscow, Russia

    M. O. Anosova, Yu. A. Kostitsyn & L. N. Kogarko

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  1. M. O. Anosova
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  2. Yu. A. Kostitsyn
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  3. L. N. Kogarko
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Correspondence to M. O. Anosova, Yu. A. Kostitsyn or L. N. Kogarko.

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Translated by M. Bogina

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Anosova, M.O., Kostitsyn, Y.A. & Kogarko, L.N. Correlation of High-Calcium Silica-Undersaturated Complex of the Maymecha–Kotuy Province with Siberian Flood Basalts: New Age Data on the Kugda Massif (Polar Siberia). Geochem. Int. 57, 1339–1342 (2019). https://doi.org/10.1134/S0016702919120048

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