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Kyrgyzstan
Kumtor Mine

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 Location:
70 km SW from Karakol, Kyrgyzstan

  Regional Office:
150, Elebaev Street
Karakol
Kyrgyzstan
772206
Phone  ...  Subscription required
Fax(+996-3922)-7-03-03
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2031


Owners

Source: p. 1
CompanyInterestOwnership
OJSC Kyrgyzaltyn 100 % Indirect
On July 29, 2022, Centerra Gold Inc. announced the closing of the previously announced global arrangement agreement with Kyrgyzaltyn JSC (“Kyrgyzaltyn”) and the Government of the Kyrgyz Republic relating to the disposition of Centerra’s ownership of the Kumtor mine and investment in the Kyrgyz Republic and the termination of Kyrgyzaltyn’s involvement with the Company (the “Transaction”).

Kyrgyzaltyn transferring to Centerra all of its Centerra Shares (the “KZN Centerra Shares”) for cancellation, representing an approximate 26.0% equity interest in the Corporation, for an aggregate purchase price of approximately C$972 million (based on the closing price of C$12.56 per Centerra Share on the TSX on April 1, 2022). In satisfaction of the purchase price for the KZN Centerra Shares, Kyrgyzaltyn will receive from Centerra the 100% equity interest in its two Kyrgyz subsidiaries, Kumtor Gold Company CJSC (“KGC”) and Kumtor Operating Company CJSC (“KOC”), and, indirectly, the Kumtor mine.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Orogenic
  • Mesothermal
  • Metamorphic hosted


Summary:

Orogenic gold mineralization at Kumtor is structurally dependent and formed penecontemporaneous with shearing on major faults through the system. Alteration associated with gold mineralization formed during several stages and at relatively high temperatures. The deposit is present along a continental-scale, amagmatic shallow-dipping (~25°-45°) structure cutting phyllite strata along the Kumtor shear zone. This structure is situated at the margin of the Middle Tien Shan terrain near the Nikolaev line – the Kyrgyz-Kazakh micro-continental suture.

Major features of the Kumtor Deposit compare favourably with those in prominent orogenic gold deposits present in black shale flysch strata such as Muruntau (Uzbekistan), Sukhoi Log, Olympiada and Natalka (Russia). However, contrasting features with these deposits include host-rock composition and age, age and grade of host rock metamorphism, age of mineralization, and presence or absence of magmatic rock, as well as degree and composition of associated alkaline metasomatism (sodium versus potassium). Nonetheless, the main distinctive feature of the Kumtor deposit versus other orogenic gold deposits hosted by black shales is absence of anomalous arsenic (>100 ppm) in mineralized rock. Another unusual feature of Kumtor mineralization is its large quantity of CaO gains, together with sulphur and CO2. This has resulted in a major presence of abundant MnFe-carbonate minerals in mineralized rock, accompanied with a relatively re ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining is carried out using conventional open pit drill, blast, load, and haul operations. There are WRSFs currently in use and planned to be used for the remaining mine life, all of which require continuous management due to underlying foundation conditions and/or water inflow from adjacent glaciers. The Central, Southwest and Sarytor open pit rock masses are structurally complex with many faults and relatively weak rock mass, particularly the Central Pit; coupled with adjacent glaciers, this makes for a relatively complex mining situation requiring continuous geotechnical and water management. Over the remaining mine life Kumtor plans to mine 60.2 Mt ore and 1,641 Mt waste, have a peak mining rate of 205.6 Mt per year, average strip ratio of 27.2 waste:ore tonnes and continue until 2031.

In 2019, Centerra temporarily suspended open pit mining operations at Kumtor after a failure event at the Lysyi Valley WRSF. Due to the need to focus on search and rescue efforts as well as stabilize the WRSF, the operation was halted for one month. It is noted that the failure occurred in the then primary WRSF location causing further delay. In 2020, Kumtor Mine received all necessary approvals and permits to recommence operations and continue ore processing.

Open pit mining is performed using conventional open pit bulk mining methods with hydraulic shovels and mining trucks on 10-m benches.

The top mining elevation in the current ultimate pit design is at ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits202120202019201820172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required535563551
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required156,439 kt180,331 kt181,878 kt144,399 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required10,970 kt7,356 kt5,084 kt8,911 kt
Tonnes milled  ......  Subscription required  ......  Subscription required5,968 kt6,325 kt6,246 kt6,303 kt
Daily mining rate  ......  Subscription required  ......  Subscription required484 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2020:
The open pit mineral reserves and resources are estimated based on a cut-off grade of 0.85 g/t Au for the Central Pit and 1.0 g/t Au for the Southwest and Sarytor deposits.
Underground mineral resources are based on a cutoff grade of 4.9 g/t Au.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (OP) 10.693 Mt Gold 1.42 g/t 487 koz
Probable In-Situ (OP) 59.613 Mt Gold 2.88 g/t 5,525 koz
Proven & Probable In-Situ (OP) 70.306 Mt Gold 2.66 g/t 6,013 koz
Measured In-Situ (OP) 9.478 Mt Gold 3.44 g/t 1,048 koz
Indicated In-Situ (OP) 16.054 Mt Gold 2.39 g/t 1,232 koz
Measured & Indicated In-Situ (OP) 25.532 Mt Gold 2.78 g/t 2,280 koz
Inferred In-Situ (OP) 20.864 Mt Gold 1.97 g/t 1,324 koz
Inferred In-Situ (UG) 13.1 Mt Gold 7.46 g/t 3,141 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Gold USD  ......  Subscription required† 413 / oz†   313 / oz†   342 / oz†  
All-in sustaining costs (sold) Gold USD 694 / oz   698 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 694 / oz†   698 / oz†   640 / oz†  
All-in costs Gold USD  ......  Subscription required†  ......  Subscription required† 843 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units202020192018201720162015
OP mining costs ($/t mined) USD 1.521.261.171.11.271.24
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202120202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 43.7   60.6   61  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 199.2   279   212.5  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 660.1   685.2   686.4  
Operating Income M USD  ......  Subscription required
Earnings M USD  ......  Subscription required  ......  Subscription required
Operating Cash Flow M USD  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment:
HME TypeModelQuantityRef. Date
Dozer ....................... Subscription required ....................... Subscription required Jun 30, 2020
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Nov 1, 2018
Drill ....................... Subscription required ....................... Subscription required Jun 30, 2020
Drill ....................... Subscription required ....................... Subscription required Jun 30, 2020
Drill (blasthole) ....................... Subscription required Jun 30, 2020
Excavator ....................... Subscription required ....................... Subscription required Nov 1, 2018
Excavator ....................... Subscription required ....................... Subscription required Nov 1, 2018
Grader ....................... Subscription required ....................... Subscription required Nov 1, 2018
Grader ....................... Subscription required ....................... Subscription required Nov 1, 2018
Loader ....................... Subscription required ....................... Subscription required Nov 1, 2018
Loader ....................... Subscription required ....................... Subscription required Nov 1, 2018
Loader ....................... Subscription required ....................... Subscription required Nov 1, 2018
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Truck (haul) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Truck (haul) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Truck (water) ....................... Subscription required ....................... Subscription required Nov 1, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Nov 1, 2018
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 28, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
Other 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Corporate Presentation 2018
Management Discussion & Analysis 2018
Press Release 2018
Annual Report 2017
Annual Report 2016
Technical Report 2015
Annual Report 2014
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Subscription required - Subscription is required.

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