Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Shrinkage stoping
- Sub-level open stoping (SLOS)
|
Production Start | ... |
Mine Life | 2028 |
Source:
p. 87
Polymetal International plc holds Dukat hub through its 100% subsidiary Magadan Silver JSC.
Contractors
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Summary:
The Dukat deposit covers 11 sq km and comprises 87 distinct ore veins (only eight of them are fully depleted) and 34 ore zones. Ore bodies dip steeply, with an average width of 0.6 to 21 m. The five largest ore zones display continuity over several hundred metres and account for 85 per cent of ore reserves of the deposit. The largest ore body has a maximum thickness of up to 21 m, a strike length of approximately 1.2 km. Major ore minerals include silver sulphides and silver sulphasalts, as well as native silver and native gold associated with sulphides.
The Okhotsk-Chukot volcanic belt formed over 25 Ma (middle Albian-Cenomanian) (Belyi, 1994) at the boundary between the continental Verkhoyansk-Chukot and Koryak-Kamchatka terranes. This giant belt is 3000 km long is composed of subaerial volcanic rocks. Relative to the oceanic margin, the Okhotsk-Chukot belt is divided into the inner, outer, and perivolcanic zones. The intricate structure of terranes of the basement and the Okhotsk-Chukot belt produced a diversity of epithermal deposit types. The inner zone of the belt mainly accommodates porphyry Cu-Mo deposits. The outer and perivolcanic zones include gold-silver and silver-tin ore deposits. The gold-silver subtype is more widespread in the outer zone (Karamken, Valunisty, Kupol, and Dvoinoi). Deposits of the silver subtype (Dukat, Lunnyi, Arylakh, Golcovy and others) are confined to the volcanic rift located between the Yana Kolyma and Omolon terranes of the Okhotsk-Chukot belt.
Mining Methods
- Shrinkage stoping
- Sub-level open stoping (SLOS)
Summary:
At Dukat, underground mining is now the only source of ore. The conditions for underground mining activites are favourable, with competent ore and host rock made more stable by the permafrost extending to a depth of 300 to 350 m. As a result, very little support is required and a mostly sub-level open stoping mining method is used with minor amounts of ore extracted from manual shrinkage stopes. Underground mining at Dukat is characterised by wide, steeply dipping ore bodies with good wall stability and consistent geometry down-dip and along strike. The Dukat underground mine is accessible by multiple adits located near main ore zones and is relatively shallow, with all current and planned working levels located less than 100 m below the valley floor.
Both underground development and stoping at Dukat are fully mechanised, with the use of trackless equipment. The ore is delivered by trucks to a centralised underground railway. The railway transports the ore to the crusher, which is located immediately at the exit of the railway from the underground mine. Ore from the crusher and the adjacent ore storage yard is then transported to the Omsukchan concentrator by contractors.
Source:
Summary:
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Production:
Commodity | Units | 2020 | 2018 | 2017 |
Gold
|
koz
| ...... | 0 | 0 |
Silver
|
koz
| ...... | ...... | ...... |
All production numbers are expressed as metal in doré.
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Operational Metrics:
Metrics | 2019 | 2018 | 2017 |
Ore tonnes mined
| 1,658 kt | 1,660 kt | 1,652 kt |
Reserves at January 1, 2021:
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
4,190 kt
|
Gold
|
0.5 g/t
|
64 koz
|
Proven
|
4,190 kt
|
Silver
|
246 g/t
|
33,207 koz
|
Proven
|
4,190 kt
|
Gold Equivalent
|
3.5 g/t
|
474 koz
|
Probable
|
2,230 kt
|
Gold
|
0.5 g/t
|
36 koz
|
Probable
|
2,230 kt
|
Silver
|
238 g/t
|
17,133 koz
|
Probable
|
2,230 kt
|
Gold Equivalent
|
3.4 g/t
|
248 koz
|
Proven & Probable
|
6,420 kt
|
Gold
|
0.5 g/t
|
100 koz
|
Proven & Probable
|
6,420 kt
|
Silver
|
243 g/t
|
50,340 koz
|
Proven & Probable
|
6,420 kt
|
Gold Equivalent
|
3.5 g/t
|
722 koz
|
Measured
|
890 kt
|
Gold
|
0.9 g/t
|
25 koz
|
Measured
|
890 kt
|
Silver
|
428 g/t
|
12,173 koz
|
Measured
|
890 kt
|
Gold Equivalent
|
6.2 g/t
|
175 koz
|
Indicated
|
490 kt
|
Gold
|
1 g/t
|
15 koz
|
Indicated
|
490 kt
|
Silver
|
447 g/t
|
7,042 koz
|
Indicated
|
490 kt
|
Gold Equivalent
|
6.5 g/t
|
102 koz
|
Measured & Indicated
|
1,380 kt
|
Gold
|
0.9 g/t
|
40 koz
|
Measured & Indicated
|
1,380 kt
|
Silver
|
435 g/t
|
19,215 koz
|
Measured & Indicated
|
1,380 kt
|
Gold Equivalent
|
6.3 g/t
|
277 koz
|
Inferred
|
1,750 kt
|
Gold
|
0.8 g/t
|
47 koz
|
Inferred
|
1,750 kt
|
Silver
|
458 g/t
|
25,752 koz
|
Inferred
|
1,750 kt
|
Gold Equivalent
|
6.5 g/t
|
364 koz
|
Total Resource
|
3,130 kt
|
Gold
|
0.9 g/t
|
87 koz
|
Total Resource
|
3,130 kt
|
Silver
|
448 g/t
|
44,967 koz
|
Total Resource
|
3,130 kt
|
Gold Equivalent
|
6.4 g/t
|
642 koz
|
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