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Russia
Goltsovoye Mine (Dukat hub Operation)

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 Location:
185 km W from Evensk, Russia

  Regional Office:
Prospect Narodnogo Opolcheniya 2
St. Petersburg
Russia
Phone  ...  Subscription required
Fax+7-812-753-6376
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Silver
Mining Method
  • Longwall
  • Sub-level stoping
  • Shrinkage stoping
  • Room-and-pillar
Processing
  • Gravity separation
  • Flotation
  • Agitated tank (VAT) leaching
  • Counter current decantation (CCD)
  • Merrill–Crowe
  • Cyanide (reagent)
Mining at Goltsovoye has now been completed with the operation transferred to care and maintenance.


Owners

Source:
CompanyInterestOwnership
Polymetal International plc 100 % Indirect
Magadan Silver JSC 100 % Direct
Polymetal International plc holds Dukat hub through its 100% subsidiary Magadan Silver JSC.

Deposit Type

  • Vein / narrow vein


Summary:

Goltsovoye is a typical narrow-vein deposit of multiple ore bodies with an average width of 4.6 m. In addition to silver, the ore also contains amounts of lead as well as traces of zinc and copper. The distribution of silver in the veins and geometry of ore bodies is highly irregular and requires a substantial amount of in-fill drilling to convert resources to reserves. Most ore bodies have a medium dip (35 to 45 degrees). They can be traced for up to 565 m along strike and are open down dip. The major ore minerals are sulphides, including galena, freibergite, and other silver sulphides.


Mining Methods

  • Longwall
  • Sub-level stoping
  • Shrinkage stoping
  • Room-and-pillar


Summary:

Underground conditions at Goltsovoye are generally favourable, with competent host rock. The ore is of variable competency, with some weak stopes closer to the surface. All underground workings are located in permafrost, with limited support being provided by steel anchors and wire mesh. The mining methods include sub-level open stoping (50 per cent. of ore, used for steeply dipping relatively wide ore bodies), shrinkage stoping (25 per cent., steeply dipping narrow veins), longwall mining (15 per cent., shallow-dip narrow veins) and inclined room-and pillar (10 per cent., shallow-dip wide ore bodies).


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation
  • Agitated tank (VAT) leaching
  • Counter current decantation (CCD)
  • Merrill–Crowe
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Omsukchan concentrator uses conventional sulphide flotation technology, with each section designed to treat different types of feedstock. To achieve optimal results, extensive geotechnological testing is employed to determine the suitability of a particular ore for one of the sections and to assist in the selection of technological parameters (feed rate and reagent addition).

Section 1 is designed to treat simple metallurgical ores from the Dukat mine which typically yield higher recoveries with lower reagent consumption and generate concentrate that is amenable to cyanidation. The processing circuit comprises three-stage grinding (one SAG mill and two ball mills) followed by flash flotation and conventional flotation.

Section 2 is designed to treat ores that are technically more complicated, including feedstock from Goltsovoye, Lunnoye and old stockpiles. The processing circuit comprises two-stage grinding (one SAG mill and one ball mill) followed by gravity ........


Combined production numbers are reported under Dukat hub Operation

Operational Metrics:

Metrics201920182017
Ore tonnes mined  ......  Subscription required193 kt190 kt
Subscription required - Subscription is required.

Reserves at January 1, 2020:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 60 kt Silver 355 g/t 671 koz
Proven & Probable 60 kt Gold Equivalent 4.4 g/t 8 koz
Total Resource 290 kt Silver 819 g/t 7,645 koz
Total Resource 290 kt Gold Equivalent 10.2 g/t 96 koz


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 14, 2020
....................... Subscription required ....................... Subscription required Subscription required Jul 14, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Annual Report 2018
Quarterly Report 2018
Project Description 2016
Subscription required - Subscription is required.

Aerial view:

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