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Kimberlitic Magmatism in the South-Western Flank of the Vilui Basin

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Abstract

We have analyzed 141 grains of pyrope from Neogene sediments in a quarry of construction materials, in the Kenkeme River catchment, along its left-side tributary (Chakiya River), about 60 km northwest of Yakutsk city. The mineral chemistry patterns of pyropes are typical of Jurassic–Cretaceous barren kimberlites, like the pipes of Obnazhennaya or Muza, but are uncommon to diamondiferous Middle Paleozoic kimberlites. The results allow identifying the magmatic event and placing time constraints on kimberlite magmatism in the southeastern flank of the Vilui basin, which was part of the Late Jurassic–Early Cretaceous tectonic-magmatic event in northeastern Asia.

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Funding

The study was supported by grant “Arktika” 18-05-70063 from the Russian Foundation for Basic Research, supported by the Russian Science Foundation (Grant no. 18-17-00249), was carried out by government assignment to the V.S. Sobolev Institute of Geology and Mineralogy (Novosibirsk) and as part of projects 0381–2019–0001 and 0381–2019–0004 at the Institute of Diamond and Noble Metals Geology (Yakutsk).

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Correspondence to V. P. Afanasiev.

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Translated by N. Astafiev

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Afanasiev, V.P., Pokhilenko, N.P., Grinenko, V.S. et al. Kimberlitic Magmatism in the South-Western Flank of the Vilui Basin. Dokl. Earth Sc. 490, 51–54 (2020). https://doi.org/10.1134/S1028334X20020038

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  • DOI: https://doi.org/10.1134/S1028334X20020038

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