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Abstract <p>The average concentrations and paired correlation coefficients of elements for the geochemical background of sedimentary rocks in the central part of the Nakyn kimberlite field, which contains the Mayskoye and other diamond deposits, and in the area of the deposit near the kimberlites are calculated. Elements of kimberlites, carbonatites and basites were selected for analysis: Cr, Ni, Co, Ba, Sr, Zr, V, Zn and Sc. High positive correlation coefficients between the specified elements have been established for background concentrations. At the same time, in the near-kimberlite space, while maintaining the average background contents, significant decreases in correlation were found up to its absence between elements of different groups. Differences in the average contents of elements in the compression and extension sectors are revealed. A mechanism for the redistribution of elements in high-temperature (100–600°C) fluids accompanying the explosive kimberlite formation is proposed. The established violation of correlations of background element concentrations in the sedimentary rocks containing kimberlites may serve as a new prospecting indicator of hidden diamond deposits.</p>

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Violation of Correlations of Cr, Ni, Co, Ba, Sr, Zr, Zn, V, and Sc in Ordovician Sedimentary Rocks Containing Kimberlites of the Mayskoye Diamond Deposit in Yakutia

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • P. A. Ignatov,
  • R. U. Eremenko,
  • N. N. Akinfeev,
  • A. V. Tolstov,
  • I. M. Ovchinnikov,
  • P. N. Illarionov,
  • V. I. Starostin

摘要

Abstract

The average concentrations and paired correlation coefficients of elements for the geochemical background of sedimentary rocks in the central part of the Nakyn kimberlite field, which contains the Mayskoye and other diamond deposits, and in the area of the deposit near the kimberlites are calculated. Elements of kimberlites, carbonatites and basites were selected for analysis: Cr, Ni, Co, Ba, Sr, Zr, V, Zn and Sc. High positive correlation coefficients between the specified elements have been established for background concentrations. At the same time, in the near-kimberlite space, while maintaining the average background contents, significant decreases in correlation were found up to its absence between elements of different groups. Differences in the average contents of elements in the compression and extension sectors are revealed. A mechanism for the redistribution of elements in high-temperature (100–600°C) fluids accompanying the explosive kimberlite formation is proposed. The established violation of correlations of background element concentrations in the sedimentary rocks containing kimberlites may serve as a new prospecting indicator of hidden diamond deposits.