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A unique ore-placer cluster with high-Hg gold mineralization in the Amur region (Russia)

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Abstract

This work presents the geological structure and a description of gold-ore manifestations and gold placers in the Un’ya–Bom ore-placer cluster of the Amur gold-bearing province. The host rocks are Late Paleozoic and Mesozoic black-shale formations. Intrusive formations are rare. The sublatitudinal Un’ya thrust fault, along which Paleozoic sandstones overlap Mesozoic flyschoid deposits, is regarded as an orecontrolling structure. Gold–quartz and low-sulfide ores are confined to quartz-vein zones. Ore minerals are arsenopyrite, scheelite, ferberite, galena, and native gold. Gold-ore manifestations and placers contain high-Hg native gold. The high Hg content in native gold is explained by the occurrence of the eroded frontal part of the gold-ore pipe in the ore cluster, a source of native gold.

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Authors and Affiliations

  1. Geotechnological Research Center, Far East Branch, Russian Academy of Sciences, Petropavlovsk-Kamchatsky, 683002, Russia

    V. A. Stepanov & V. G. Moyseenko

  2. Institute of Geology and Nature Management, Far East Branch, Russian Academy of Sciences, Blagoveshchensk, Amur oblast, 675000, Russia

    A. V. Melnikov

Authors
  1. V. A. Stepanov
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  2. V. G. Moyseenko
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  3. A. V. Melnikov
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Corresponding author

Correspondence to V. A. Stepanov.

Additional information

Original Russian Text © V.A. Stepanov, V.G. Moyseenko, A.V. Melnikov, 2017, published in Doklady Akademii Nauk, 2017, Vol. 472, No. 6, pp. 681–685.

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Stepanov, V.A., Moyseenko, V.G. & Melnikov, A.V. A unique ore-placer cluster with high-Hg gold mineralization in the Amur region (Russia). Dokl. Earth Sc. 472, 173–177 (2017). https://doi.org/10.1134/S1028334X17020210

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  • DOI: https://doi.org/10.1134/S1028334X17020210

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