Non-kimberlitic sources of diamonds and prospects of their discovery in the ukrainian shield

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Authors:

M.V.Ruzina, Dr. Sc. (Geol.), Prof., orcid.org/0000-0002-6612-9750, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.A.Tereshkova, Cand. Sc. (Geol.), Assoc. Prof., orcid.org/0000-0001-5731-7349, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

N.V.Bilan, Cand. Sc. (Geol.), Assoc. Prof., orcid.org/0000-0002-4086-7827, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.V.Zhyltsova, Cand. Sc. (Geol.), Assoc. Prof., orcid.org/0000-0002-9383-4797, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. To substantiate the prospects of potentially diamondiferous formations of non-kimberlite genesis and improve the forecasting criteria for diamond deposits within the Ukrainian Shield.

Methodology. The research involved a complex study of the structural features, compositional-indicating evidence and distribution regularities of potentially diamond-bearing formations of non-kimberlite genesis. Petrographic characteristics and composition of ore mineralization were studied in thin and polished sections using a polarization microscope Altami POLAR P-312. To substantiate the material composition of diamond-prospecting rocks, the results of X-ray, thermal and microprobe analyzes were interpreted.

Findings. Fluid-explosive units that have been discovered within the Inhul megablock of the Ukrainian Shield are diamondiferous formations. Fluid-explosive units from the Bilozerska greenstone structure within the Middle Pry­dniprovie megablock of the Ukrainian shield is largely similar to the above-mentioned unites as well as the diamond-bearing phyllites from Diamantina (Brazil) and diamond-bearing visherites of the Urals. This by analogy with a number of world metallogenic provinces allows predicting the possibility of discovery of non-traditional diamond-prospective formations of non-kimberlite genesis within the Middle Prydniprovie megablock of the Ukrainian Shield as it is a typical Archean craton.

Originality. Established factual background is indicative of credible occurrences of potentially diamond-bearing formations of non-kimberlite genesis within the Middle Prydniprovie megablock. During diagnostics of fluid-explosive units of the studied region, a number of structural features observed exclusively in fluidolites are identified. Fluid-explosive formations also contain abnormal concentrations of noble metals.

Practical value. The results of the research allow us to forecast the possible discovery of non-traditional diamond-prospective formations of non-kimberlite genesis within the Middle Prydniprovie megablock of the Ukrainian Shield.

References.

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7. Kalashnyk, H. A., Fedoryshyn, Yu. I., Kuzmin, A. V.  and Kiriano, M. M., 2016. Preconditions of formation and criteria for prediction of diamondiferrous structures on the Ukrainian shield. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 6, pp. 22‒40.

8. Yatsenko, G. M., Bekesha, S. N., Hayovskiy, O. V. and Yatsenko, I. G., 2011. Activation periods, ore-bearing structures and formations of lamproite type in the Archean and Proterozoic blocks of the Ukrainian shield. Article 2. Kirovograd block. Mineralni Resursy Ukrainy [e-journal], 2, pp.25‒29. Available at: <http://fluidolit.ucoz.ru/publ/publikacii/ehpokhi_aktivizacii_rudonosnye_struktury_i_formacii_lamproitovogo_tipa_v_arkhejskikh_i_proterozojskikh_blokakh_ukrainskogo_shhita/2-1-0-18> [Accessed 20 January 2018].

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10. Ruzina, M. V., Tereshkova, O. A., Yatsyna, D. V. and Dodatko, A. D., 2013. Listvenite-beresites from the Middle Predniprovie megablock of the Ukrainian shield and its ore content. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, pp. 24‒32.

11. Ruzina, M. V., Tereshkova, O. A., Bilan, N. V. and Vunda, N. G., 2016. Prospects for diamond content in Raygorodska strata of the Ukrainian shield. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, pp. 11–18.

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