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Burgali Epithermal Au–Ag Deposit in the Paleozoic Kedon Volcanic Belt (Northeastern Russia)

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Abstract

The Burgali deposit is located in the Paleozoic Kedon volcanic belt (KVB) within the Omolon cratonic terrane. The orebodies of the Burgali deposit are veined and stockwork-type. The studies of the wallrock metasomatites demonstrate that the erosional truncation of the deposit is close to minimal. The ores of the deposit are enriched in the chalcophile elements (Au, Ag, As, Sb, Te, W, Mo, and Bi) and poor in the rare earths. The rare-earth element (REE) spectra are dominated by light lanthanides. The ores are characterized as very low-sulfidation with finely disseminated mineralization, widespread occurrence of chalcedony, and widespread colloform-banded, often combined with brecciated, structures. The late quartz veins contain Lower Carboniferous coaly siltstone fragments, filled with petrified timber remains, which indicate the Carboniferous age of the ore mineralization. The ores contain widespread Au- and Te-bearing pearceite and rare minerals such as argyrodite and the selenous petrovskaite and uytenbogaardtite. The data obtained enable the Burgali deposit to be classified as low-sulfidation epithermal. The outlook for Ag and Au reserve additions is based on the further studies and exploration of the ore-bearing stockwork.

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ACKNOWLEDGMENTS

We thank the management and geologists of the Omolon Gold Mining Company and the Magadan Office of PAO Polymetal for their assistance in our studies.

Funding

This study was supported by a state assignment for the Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences (project “Metallogeny of Mining Districts within the Volcano–Plutonogenic and Folded Orogenic Belts of Northeastern Russia”).

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Authors and Affiliations

  1. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, 119017, Moscow, Russia

    A. V. Volkov, A. A. Sidorov & K. Yu. Murashov

  2. Northeastern Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, 685010, Magadan, Russia

    N. E. Savva & E. E. Kolova

  3. ZAO Omolon Gold Mining Company, 685000, Magadan, Russia

    B. I. Ishkov

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  1. A. V. Volkov
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Correspondence to A. V. Volkov.

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Translated by E. Murashova

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Volkov, A.V., Savva, N.E., Ishkov, B.I. et al. Burgali Epithermal Au–Ag Deposit in the Paleozoic Kedon Volcanic Belt (Northeastern Russia). Geol. Ore Deposits 63, 34–53 (2021). https://doi.org/10.1134/S1075701520060082

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