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Kazakhstan
Varvara Mine (Varvara hub Operation)

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 Location:
103 km SW from Kostanay, Kazakhstan

  Regional Office:
D.Kunaeva str., 10
Astana
Kazakhstan
010000
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  • Overview
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Copper
Mining Method
  • Truck & Shovel / Loader
  • Dragline
Production Start...


Owners

Source: p. 103
CompanyInterestOwnership
Polymetal International plc 100 % Indirect
Polymetal International plc holds Varvara through its 100% subsidiary Varvarinskoye JSC.

Contractors

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Deposit Type

  • Skarn


Summary:

The mineralized bodies at Varvarinskoye are classic gold-copper skarn types that are primarily contained within the eastern side of the local fault and are associated with the border between geological formations. Copper-gold porphyry is overlaid with quartz-sulphide gold veins and scarn to produce very complex and geometrically complicated zones of economic mineralisation. Mineralisation is discontinuous over a strike length of 4 km and is divided into five zones.

The main primary copper mineral is chalcopyrite with some bornite. The gold is mostly in free form and associated with pyrites and other sulphides. A hallow oxidation zone occurs within 10 to 50 m below the surface. In this part of the Varvara deposit, copper is mostly represented by oxide minerals not amenable to conventional flotation.

Based on mineralogy and metallurgical characteristics, all mineralisation is divided into four types based on the degree of oxidation and copper grade:

1.primary gold (copper less than 0.2 per cent.);
2.primary copper (with gold present);
3.oxide gold (copper less than 0.1 per cent.);
4.oxide copper (with gold present).

Types 1 and 3 are processed through the leaching circuit and are known as leach ore. Type 2 is processed through the flotation circuit and is known as float ore. Type 4 is currently stockpiled separately and not processed.

Komarovskoye is a low-sulphide quartz gold deposit located along the contac ........


Mining Methods

  • Truck & Shovel / Loader
  • Dragline


Summary:

The Varvara deposit is elongated in a northeastern direction and has a length of up to 4.5 m and a width of 1.2 km.

Development of reserves is carried out by "Ugo-Zapadny", "Severo-Vostochny-3" and "Prirechny" open pits.

Excavation of rock is carried out in 5-10 m benches. Draglines and shovels are utilized for extraction-and-loading operations in pit and wheel loaders in stockpiles. Ore and waste haulage is carried out via Cat777 and KOMATSU HD 785 haulage trucks.

Drilling and blasting operations are carried out by contractor.

Separate storage of ores is carried out at the Varvara, depending on the grades of ore and the content of the useful component.


Crushing and Grinding

Run-of-mine ore is crushed in batches in a single jaw crusher, with separate crushed ore storage for leach and float material.

The float ore circuit comprises two-stage milling (SAG mill and ball mill).

The leach ore circuit comprises two-stage milling.


Processing

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Summary:

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Combined production numbers are reported under Varvara hub Operation

Operational Metrics:

Metrics20182017
Ore tonnes mined 870 kt1,261 kt
Waste 7.2 Mt9.6 Mt

Reserves at January 1, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 25,080 kt Gold 0.8 g/t 651 koz
Proven & Probable 25,080 kt Copper 0.43 % 40 kt
Proven & Probable 25,080 kt Gold Equivalent 0.8 g/t 651 koz
Measured & Indicated 10,860 kt Gold 1 g/t 362 koz
Measured & Indicated 10,860 kt Copper 0.48 % 13.4 kt
Measured & Indicated 10,860 kt Gold Equivalent 1 g/t 362 koz
Inferred 2,360 kt Gold 1.4 g/t 107 koz
Inferred 2,360 kt Copper 0.62 % 4.4 kt
Inferred 2,360 kt Gold Equivalent 1.4 g/t 107 koz
Total Resource 13,220 kt Gold 1.1 g/t 470 koz
Total Resource 13,220 kt Copper 0.51 % 17.8 kt
Total Resource 13,220 kt Gold Equivalent 1.1 g/t 470 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 12, 2022
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Corporate Filings & Presentations:

DocumentYear
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Quarterly Report 2018
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