Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
| Mine Life | 2028 |
In March 2022, Centerra announced it had temporarily suspended gold doré bar production at the Öksüt Mine due to mercury detected in the gold room at the ADR plant. Since then, the Company has completed construction of a mercury abatement system to allow processing of mercury-bearing ores. The Company continues to work with relevant authorities to obtain the required approvals to restart gold room operations at the ADR plant.
Subject to receipt of the final regulatory approvals and the restart of the ADR plant, the Company will be in a position to begin processing the gold-in-carbon inventory on hand of approximately 100,000 recoverable ounces. The ADR plant has the capacity to produce gold at a rate of approximately 35,000 ounces per month. |
Source:
p. 44
Centerra’s wholly-owned subsidiary (indirectly held), Öksüt Madencilik Sanayi ve Ticaret Anonim Sirketi (“OMAS”), is the holder of the rights to mining and exploration for the Öksüt Mine.
Contractors
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Deposit Type
- Epithermal
- Porphyry
- Breccia pipe / Stockwork
Summary:
The Öksüt Mine is a high-sulphidation epithermal gold deposit within the Central Anatolian Volcanic Province, part of the Tethyan Metallogenic Belt. The belt extends from southeastern Europe across Türkiye, the Caucasus, and on into Pakistan and contains a number of important gold and porphyry copper deposits. Magmatic activity and related ore forming processes are the result of the closure of the Tethyan Ocean in response to the collision between the north-moving Arabian Plate with the Eurasian Plate that began in the late Cretaceous period and continues today.
The Öksüt Mine gold mineralization is hosted within the Develidag Volcanic Complex, one of the numerous stratovolcanoes situated along the Central Anatolian Fault Zone. The volcanic complex is composed of Miocene basaltic-andesitic volcanic domes, pyroclastic rocks, and lava flows. Flow-banded Pliocene andesite overlies these sequences and the Öksüt Mine mineralization to the north and east.
There are several gold occurrences in the Öksüt Mine area, the most important of which is the Keltepe Deposit. The distribution of the alteration assemblages and the gold grades at the Keltepe Deposit are strongly zoned, with a central massive silica breccia having the highest gold grade. This core is surrounded by quartz-alunite altered volcanic rocks, and as the alteration intensity diminishes outwardly, the gold grade decreases.
The Keltepe Deposit has been oxidized to depth, up to 400 metres below the surface. The original ........
Summary:
The Öksüt Mine is a conventional truck and excavator open pit mine. Material is drilled and blasted, before being loaded and hauled to the waste dump, crusher, or the various ore stockpiles depending on the most profitable way to process the material. The two pits of the Öksüt Mine are mined simultaneously – the main Keltepe pit (mining started August 16, 2019) and the small satellite Güneytepe pit (mining started September 3, 2019). Centerra is using a mining contractor to do all mining using small excavators and 36 tonne trucks. The use of this equipment among mining contractors is common in Türkiye. The mining contractor will provide and maintain all equipment, and will perform drill, blast, load, haul, and road and dump maintenance on a unit cost basis. OMAS will provide oversight of the mining operations, grade control, survey control, mine planning, and other required technical services.
The Keltepe pit is being developed in three cutbacks to smooth stripping requirements and mine higher grade material earlier in the mine life. The smaller Güneytepe pit will be developed in two cutbacks. Lower grade material will be stockpiled throughout the project for processing at the end of the mine life.
Source:
Source:
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Flow Sheet:
Summary:
- subscription is required.
Reserves at December 31, 2022:
The open pit mineral reserves are estimated based on 0.16 grams of gold per tonne cut-off grade.
Open pit mineral resources are constrained by a pit shell and are estimated based on 0.16 grams of gold per tonne cut-off grade.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
3,173 kt
|
Gold
|
1.77 g/t
|
180 koz
|
|
Probable
|
23,925 kt
|
Gold
|
0.99 g/t
|
761 koz
|
|
Proven & Probable
|
27,098 kt
|
Gold
|
1.08 g/t
|
941 koz
|
|
Measured
|
11,436 kt
|
Gold
|
0.52 g/t
|
189 koz
|
|
Indicated
|
5,941 kt
|
Gold
|
0.43 g/t
|
82 koz
|
|
Measured & Indicated
|
17,377 kt
|
Gold
|
0.49 g/t
|
272 koz
|
|
Inferred
|
2,329 kt
|
Gold
|
0.41 g/t
|
31 koz
|
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