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Experimental Modeling of C0-Forming Processes Involving Cohenite and CO2-Fluid in a Silicate Mantle

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Abstract

Experimental studies were performed in the Fe3C–SiO2–(Mg,Ca)CO3 system (6.3 GPа, 1100–1500°C, 20–40 h). It is established that the carbide–oxide–carbonate interaction leads to the formation of ferrosilite, fayalite, graphite, and cohenite (1100 and 1200°С), as well as a Fe–C melt (1300°С). It is determined that the main processes in the system are decarbonation, redox-reactions of cohenite and a CO2-fluid, extraction of carbon from carbide, and crystallization of metastable graphite (± diamond growth), as well as the formation of ferriferous silicates. The interaction studied can be considered as a simplified model of the processes that occur during the subduction of oxidized crustal material to reduced mantle rocks.

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ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research (project no. 16–35–60024) and was performed as part of a State Assignment (project no. 0330–2016–0007).

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Authors and Affiliations

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

    Yu. V. Bataleva, Yu. N. Palyanov, Yu. M. Borzdov &  N. V. Sobolev

  2. Novosibirsk State University, 630090, Novosibirsk, Russia

    Yu. V. Bataleva, Yu. N. Palyanov, Yu. M. Borzdov &  N. V. Sobolev

  3. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    O. A. Bayukov

Authors
  1. Yu. V. Bataleva
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  2. Yu. N. Palyanov
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  3. Yu. M. Borzdov
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  4. O. A. Bayukov
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  5. N. V. Sobolev
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Correspondence to Yu. V. Bataleva.

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Translated by L. Mukhortova

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Bataleva, Y.V., Palyanov, Y.N., Borzdov, Y.M. et al. Experimental Modeling of C0-Forming Processes Involving Cohenite and CO2-Fluid in a Silicate Mantle. Dokl. Earth Sc. 483, 1427–1430 (2018). https://doi.org/10.1134/S1028334X18110016

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  • DOI: https://doi.org/10.1134/S1028334X18110016

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