Abstract
This work presents the geological structure and a description of the gold-ore occurrences and gold placers of the Un’ya-Bom ore-placer cluster of the Amur gold-bearing province. The host rocks are Late Paleozoic and Mesozoic black shales. Intrusive formations occur rarely. The sublatitudinal Un’ya Thrust is the principal ore-controlling structure. Paleozoic sandstones are thrust over Mesozoic flysch deposits along the Un’ya Thrust. The gold-ore occurrences are represented by quartz-vein zones. The ores are gold–quartz, low-sulfide. Ore minerals are arsenopyrite, scheelite, ferberite, galena, and native gold. High-Hg native gold was revealed in the ore occurrences and placers. The high Hg content in native gold is explained by the presence of the frontal part of the gold-bearing column located within the cluster; the rich placers were formed due to crushing of this column.
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V. A. Stepanov and V. G. Moiseenko, Dokl. Earth Sci. 421 (5), 779–781 (2008).
N. V. Petrovskaya, Native Gold (Nauka, Moscow, 1973) [in Russian].
V. A. Stepanov, Geology of Aurum, Argentum and Hydrargyrum, Pt. 2: Aurum and Hydrargyrum of Amur River Province (Dal’nauka, Vladivostok, 2000) [in Russian].
V. A. Stepanov, Zoning of Silica Gold Metallization in Central Kolyma (Dal’nauka, Vladivostok, 2001) [in Russian].
V. A. Stepanov, A. V. Mel’nikov, A. S. Vakh, et al., Amur River Gold Ore Province (Amur State Univ., Blagoveshchensk, 2008) [in Russian].
M. S. Fisher, Bull.-Inst. Min. Metall. 2 (9) (1935).
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Original Russian Text © A.V. Melnikov, V.A. Stepanov, V.G. Moiseenko, 2017, published in Doklady Akademii Nauk, 2017, Vol. 476, No. 6, pp. 660–664.
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Melnikov, A.V., Stepanov, V.A. & Moiseenko, V.G. A unique ore-placer area of the Amur region with high-Hg gold. Dokl. Earth Sc. 476, 1134–1137 (2017). https://doi.org/10.1134/S1028334X17100245
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DOI: https://doi.org/10.1134/S1028334X17100245