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Nature of voluminous meimechite–picrite associations in Siberia and other regions

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Abstract

Analysis of petrochemical and geochemical information of the same levels, which characterize rocks and primary melt inclusions in olivines of heterochronic meimechite–picrite associations in Siberia (Maimecha–Kotui province), Primorye (Sikhote–Alin), and Kamchatka demonstrated that, besides the similar appearance and identical structural patterns, they are considerably discrepant in the concentration and distribution of incompatible and rare earth elements. Those differences are also observed for the compositions and evolutionary trends of parental high-temperature magnesium-rich melts. This, in turn, was assumed to be a consequence of a variable degree of melting of the mantle protoliths in the mentioned regions, which is supported by geochemical modeling.

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Authors and Affiliations

  1. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, pr. Akad. Koptyuga 3, Novosibirsk, 630090, Russia

    Yu. R. Vasil’ev & M. P. Gora

  2. Novosibirsk State University, Novosibirsk, Russia

    Yu. R. Vasil’ev

Authors
  1. Yu. R. Vasil’ev
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  2. M. P. Gora
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Correspondence to M. P. Gora.

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Original Russian Text © Yu.R. Vasil’ev, M.P. Gora, 2016, published in Doklady Akademii Nauk, 2016, Vol. 468, No. 1, pp. 71–74.

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Vasil’ev, Y.R., Gora, M.P. Nature of voluminous meimechite–picrite associations in Siberia and other regions. Dokl. Earth Sc. 468, 469–472 (2016). https://doi.org/10.1134/S1028334X1605010X

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  • DOI: https://doi.org/10.1134/S1028334X1605010X

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