Overview
Stage | Production |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Sub-level open stoping (SLOS)
- Undefined backfill
|
Production Start | ... |
Mine Life | 2037 |
Source:
p. 87
Polymetal International plc holds Mayskoye mine through its 100% subsidiary Mayskoye Gold Mining Company LLC.
Contractors
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Summary:
The Mayskoye gold-bearing ore deposit is located at the Eastern wing of the Palyvaamsky synclinorium, related to the Chukotsk Mesozoic plicate system. The stratigraphy of the district is represented by Triassic siltstones and limestones, unconformably overlapped by cretaceous stratificated and sub-volcanic formations, and early-cretaceous continental precipitations. The cretaceous volcanic formation becomes revealed towards the South from the Mayskoye and forms the Chukotka volcanic belt. Intrusive strata are rarely found, and are represented by acid sub-volcanic bodies.
Triassic strata are divided into middle Triassic, undivided, and upper Triassic subdivisions, having a total thickness from 1700 to 2500 m. The lower parts of the subdivisions, are composed, in general, by clayey shales, the middle part being formed by sandstones, the upper part, in general, formed by siltstones and flaky shales. The cretaceous of volcanic origin, and carboniferous continental precipitations overlap the Triassic precipitations with an angular disagreement. The cretaceous complex is composed of acid tufas, tufa-lavas and ignimbrites. The continental complex is represented by sandstones, siltstones, carbonaceous shales and coals. The undivided Quaternary precipitations are found all around the area.
The localization of gold mineralization is controlled by the Northern and North-Eastern tectonic zones, dated to the Mesozoic folding. The containing strata are composed by s ........
Mining Methods
- Truck & Shovel / Loader
- Sub-level open stoping (SLOS)
- Undefined backfill
Summary:
Current reserves at Mayskoye have an estimated depth of 300 m from the surface, with resources extending to a depth of 1,000 m. The primary ore that makes up more than 90 % of the total reserves, is accessed with three separate sets of twin spiral ramps in the central, eastern and western parts of the deposit. This technique allows for greater mining flexibility in terms of tonnage, grade and metallurgical characteristics (sulphur content and organic carbon content).
Several underground mining methods are used at Mayskoye, but more than 80% of ore is mined by sub-level open stoping. Oxidised ore is mined in a series of shallow open pits, as well as the underground. However, due to persistent problems with ore stability that was partly responsible for fatal accidents at the mine, we accelerated a planned changeover from drift-and-fill mining to sublevel open stoping with backfill. The new mining system was designed to ensure that employees are not exposed to the falling rocks in the partially broken stopes since all development and production drilling will be done from waste openings.
In order to reduce surface disposal of waste the Company will use waste as backfill at the Mayskoye underground. In 2020, basic engineering was completed. The project is expected to commence in 2023.
Source:
Source:
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Source:
Summary:
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Production:
Commodity | Product | Units | 2020 | 2019 | 2018 | 2017 |
Gold
|
Metal in doré
|
koz
| ...... | ...... | 117 | 124 |
Gold
|
Metal in concentrate
|
koz
| ...... | ...... | 120 | 96 |
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Operational Metrics:
Metrics | 2020 | 2019 | 2018 | 2017 |
Annual processing capacity
| ...... | 850 kt | 850 kt | |
Waste
| ...... | 5.4 Mt | 5 Mt | 4.4 Mt |
Ore tonnes mined
| ...... | 813 kt | 1,005 kt | 944 kt |
Total tonnes mined
| ...... | | | |
Tonnes processed
| ...... | 878 kt | 861 kt | 711 kt |
Reserves at January 1, 2021:
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
1,350 kt
|
Gold
|
7.5 g/t
|
330 koz
|
Probable
|
5,210 kt
|
Gold
|
8.9 g/t
|
1,496 koz
|
Proven & Probable
|
6,560 kt
|
Gold
|
8.6 g/t
|
1,826 koz
|
Measured
|
1,810 kt
|
Gold
|
13.3 g/t
|
775 koz
|
Indicated
|
1,520 kt
|
Gold
|
12.5 g/t
|
608 koz
|
Measured & Indicated
|
3,330 kt
|
Gold
|
12.9 g/t
|
1,383 koz
|
Inferred
|
3,870 kt
|
Gold
|
11.3 g/t
|
1,402 koz
|
Total Resource
|
7,200 kt
|
Gold
|
12 g/t
|
2,784 koz
|
Commodity Production Costs:
| Commodity | Units | 2020 | 2019 | 2018 | 2017 |
Total cash costs
|
Gold Equivalent
|
USD
|
......
|
......
|
829 / oz
|
1,040 / oz
|
All-in sustaining costs (AISC)
|
Gold Equivalent
|
USD
|
......
|
......
|
970 / oz
|
1,236 / oz
|
Financials:
| Units | 2020 | 2019 | 2018 | 2017 |
Sustaining costs
|
M USD
| ...... |
|
|
|
Capital expenditures
|
M USD
| ...... |
......
|
11
|
18
|
Revenue
|
M USD
| ...... |
......
|
115
|
139
|
EBITDA
|
M USD
| ...... |
......
|
35
|
20
|
Corporate Filings & Presentations:
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