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The Formation Conditions of Pyroclastic Rocks at the Eastern Margin of the Tunguska Syneclise for Forecasting during Diamond Prospecting

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Abstract

The trap rocks have been studied at diamond-bearing regions within the eastern wall of the Tunguska Syneclise. The composition and structural features of pyroclastic rocks of a basaltic complex have been studied on the basis of lithotectonic analysis. The main volume of explosive volcanic rocks is composed of variously clastic tuffs. Their areal occurrence is related to epicenters of interpreted volcanic structures, which are a negative factor during diamond prospecting. The presence of arched intrusive plutons within the paleovalleys and kimberlite-controlling grabens is desirable during prospecting of new primary and placer diamond deposits.

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REFERENCES

  1. Korobkov, I.G. and Evstratov, A.A., Models of mafic volcanic structures and their role at prognosis evaluation of covered diamondiferous areas in the east of Tunguska Syneclise, Rudy Met., 2011, nos. 3/4, pp. 93–94.

  2. Korobkov, I.G. and Evstratov, A.A., Role of mafic volcanic structures at prognosis evaluation of diamondiferous areas in the east of Tunguska Syneclise, Otech. Geol., 2012, no. 1, pp. 40–47.

  3. Korobkov, I.G., Evstratov, A.A., and Mil’shtein, E.D., Bazitovye vulkanostruktury almazonosnykh raionov vostochnogo borta Tungusskoi sineklizy (Mafic Volcanic Structures of Diamondiferous Areas in the East Side of Tunguska Syneclise), Potseluev, A.A., Ed., Tomsk: STT, 2013.

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  4. Korobkov, I.G., Nikulin, I.I., Korobkov, Ya.S., and Lytkin, K.A., New data on volcanogenic formations of mafic volcanic structures at the margin of the Tunguska Syneclise, Vestn. VGU: Geol., 2017, no. 4, pp. 64–72.

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Authors and Affiliations

  1. OOO Norilskgeologiya, 195220, St. Petersburg, Russia

    I. I. Nikulin

  2. AO Severo-Zapadnoe PGO, 199155, St. Petersburg, Russia

    I. G. Korobkov

  3. Moscow State University, 119991, Moscow, Russia

    A. A. Samsonov

Authors
  1. I. I. Nikulin
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  2. I. G. Korobkov
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  3. A. A. Samsonov
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Corresponding author

Correspondence to I. I. Nikulin.

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Translated by I. Melekestseva

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Nikulin, I.I., Korobkov, I.G. & Samsonov, A.A. The Formation Conditions of Pyroclastic Rocks at the Eastern Margin of the Tunguska Syneclise for Forecasting during Diamond Prospecting. Moscow Univ. Geol. Bull. 76, 29–35 (2021). https://doi.org/10.3103/S0145875221010099

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  • DOI: https://doi.org/10.3103/S0145875221010099

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