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Experimental estimation of the rate of gravitation fractionating of xenocrysts in kimberlite magma at high P-T parameters

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Abstract

This report considers experimental studies of the gravitation fractionating of xenocrysts (diamond, garnet, and olivine) in kimberlite magma at 4.0 GPa and 1400°C. The values obtained (0.6–0.7 m/h for 0.3-mm diamond crystals, 0.36 m/h for garnet grains, and 0.6–0.29 m/h for olivine grains) point to a high rate of xenocryst sinking in the ultralow-viscous kimberlite magma (as high as 1 m/h and more, depending on the densities and grain sizes of minerals). A high rate of xenocryst sinking in kimberlite magma results in the impossibility of preservation of heterogeneity in these melts for a sufficiently long time.

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Authors and Affiliations

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

    A. I. Chepurov, E. I. Zhimulev, V. M. Sonin, A. A. Chepurov, A. A. Tomilenko & N. P. Pokhilenko

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  1. A. I. Chepurov
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  2. E. I. Zhimulev
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  3. V. M. Sonin
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  4. A. A. Chepurov
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  5. A. A. Tomilenko
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  6. N. P. Pokhilenko
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Correspondence to A. I. Chepurov.

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Original Russian Text © A.I. Chepurov, E.I. Zhimulev, V.M. Sonin, A.A. Chepurov, A.A. Tomilenko, N.P. Pokhilenko, 2011, published in Doklady Akademii Nauk, 2011, Vol. 440, No. 5, pp. 678–681.

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Chepurov, A.I., Zhimulev, E.I., Sonin, V.M. et al. Experimental estimation of the rate of gravitation fractionating of xenocrysts in kimberlite magma at high P-T parameters. Dokl. Earth Sc. 440, 1427–1430 (2011). https://doi.org/10.1134/S1028334X11100138

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  • DOI: https://doi.org/10.1134/S1028334X11100138

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