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Chemical composition and diamond potential of kimberlites having experienced secondary alteration: Nyurbinskaya Pipe, East Siberia

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Abstract

Hydrothermal metasomatism greatly enriched kimberlites of the Nyurbinskaya Pipe, East Siberia, in secondary quartz. We have calculated normative secondary quartz values (Q) for each of 1035 X-ray fluorescence analyses for rock-forming oxides. The results are correlated with 437 diamond test intervals. A description of full diamond fraction composition is provided for each test interval. Eleven groups are recognized on the base of Q distribution, from dolomitic rocks with negative Q values to substantially quartzose rocks. Diamond potentials and crystal weights decrease with increasing Q values. We conclude that diamonds are dissolved during hydrothermal metasomatism.

The paper includes five tables, four figures, and seven references.

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Authors and Affiliations

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

    V. B. Vasilenko, L. G. Kuznetsova & V. A. Minin

  2. Botuobiya Exploration Company, ALROSA Company, Lenin Street 44B, Mirnyi, 678170, Sakha Republic, Russia

    A. V. Tolstov

Authors
  1. V. B. Vasilenko
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  2. A. V. Tolstov
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  3. L. G. Kuznetsova
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  4. V. A. Minin
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Corresponding author

Correspondence to V. B. Vasilenko.

Additional information

Original Russian Text © V.B. Vasilenko, A.V. Tolstov, L.G. Kuznetsova, V.A. Minin, 2009, published in Geokhimiya, 2009, No. 11, pp. 1146–1154.

The article was translated by the authors.

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Vasilenko, V.B., Tolstov, A.V., Kuznetsova, L.G. et al. Chemical composition and diamond potential of kimberlites having experienced secondary alteration: Nyurbinskaya Pipe, East Siberia. Geochem. Int. 47, 1075–1082 (2009). https://doi.org/10.1134/S0016702909110032

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  • DOI: https://doi.org/10.1134/S0016702909110032

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