Doklady Earth Sciences

, Volume 472, Issue 2, pp 173–177 | Cite as

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

  • V. A. Stepanov
  • V. G. Moyseenko
  • A. V. Melnikov


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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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • V. A. Stepanov
    • 1
  • V. G. Moyseenko
    • 1
  • A. V. Melnikov
    • 2
  1. 1.Geotechnological Research Center, Far East BranchRussian Academy of SciencesPetropavlovsk-KamchatskyRussia
  2. 2.Institute of Geology and Nature Management, Far East BranchRussian Academy of SciencesBlagoveshchensk, Amur oblastRussia

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