Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Room-and-pillar
- Sub-level open stoping (SLOS)
|
Production Start | ... |
Mine Life | 2031 |
Source:
p. 52
The asset (along with Zun-Holba mine) was fully acquired by the Company in late 2008 as part of the controlling interest in High River Gold Mines Ltd. High River Gold Mines Ltd holds an 82.87% share in Buryatzoloto and the Company holds directly 9.66% shares in Buryatzoloto. Totally the Company directly and indirectly owns 92.53% shares In Buryatzoloto, the owner. The asset is operated by ”Irokinda” LLC which is 100% owned by JSC ”Buryatzoloto”.
Contractors
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Deposit Type
- Vein / narrow vein
- Epithermal
- Intrusion related
Summary:
The Irokindinskoye deposit is comprised of quartz veins occurring in three main fracture systems which are flat dipping (25° to 45°) to the west. The veins are typical of other quartz vein deposits, with the veins pinching and swelling in both the strike and dip directions and in which, more often than not, the gold distribution is very irregular and the economic mineralization is located in shoots of varying strike lengths.
According to the Russian classification system for mineral deposits, the Irokinda deposit corresponds to a vein deposit of the third category of complexity. The third category of complexity or “Group 3 Deposits” is defined in the most recent Russian “reserve” classification guidelines dated December 11, 2006 as:
“Group 3. Deposits (subsoil areas) of complex geological structure with large and average size orebodies, having strongly dislocated bedding, characterized by very variable thickness and inner structure, sometimes immature quality of the minerals, and very uneven distribution of the basic valuable components. The peculiarities of the structure of the deposits (subsoil areas) are determined by the possibility of development of “reserves” of categories C1 and C2 in the process of exploration”
According to the recent classification of the gold deposits (Robert, F. et al, 2007), the Irokindiskoye deposit can be classified as an intrusion related, low sulphidation epithermal gold deposit. The characteristics for this ........
Mining Methods
- Room-and-pillar
- Sub-level open stoping (SLOS)
Summary:
Current mining operations at Irokinda are focused on three separate vein areas, Visokaya-Poperechnaya (“Visokaya mine”), Serebryakovskaya-Sluchainaya (“Serebryakovskaya mine”) and Medvezhya-Poperechnaya-Tuluinskaya (“Tuluinskaya mine”).
Development mining is achieved using modern electro-hydraulic single and twin boom drill jumbos to drill blastholes, diesel powered load-haul-dump loaders (“LHD”) to clean the blasted rock from each blasted advance, and diesel powered articulated dump trucks (“ADT”) to haul broken rock to surface.
At SS, 70% of production is achieved using mechanised long-hole sub-level open stoping with rib and crown pillars left for support. Blastholes are drilled using electro-hydraulic long-hole drill rigs, blasted ore is removed with LHD and ore is transported to surface with ADT.
The mining method at Viso, the remaining 30% of SS and planned for Tulu is manual room and pillar mining with variants (up-dip or along strike) defined by local conditions, predominantly orebody dip. The dip in these areas varies between 25° and 35°. Hand-held pneumatic rock drills are used to drill blastholes and electric scraper winches and gravity are used to direct broken ore to millholes for removal by LHD.
The LHD load ADT which transport the broken rock to surface. The surface is accessed through three transport inclines with 8° inclination, one for each mine. Each transport incline reaches the surface through ........
Source:
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Flow Sheet:
Summary:
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Reserves at December 31, 2020:
Cut-off grade for resources is 1.16 g/t Au.
Cut-off grades for reserves are 2.0 g/t Au for stockpiles' ore and in range from 1.3 to 1.6 g/t Au for underground ore depending on the deposit.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
Stockpiles
|
0.01 Mt
|
Gold
|
2.81 g/t
|
1 koz
|
Probable
|
In-Situ (UG)
|
1.413 Mt
|
Gold
|
4.34 g/t
|
197 koz
|
Probable
|
Total
|
1.424 Mt
|
Gold
|
4.3 g/t
|
198 koz
|
Indicated
|
Stockpiles
|
0.011 Mt
|
Gold
|
2.81 g/t
|
1 koz
|
Indicated
|
In-Situ (UG)
|
0.822 Mt
|
Gold
|
9.04 g/t
|
239 koz
|
Indicated
|
Total
|
0.832 Mt
|
Gold
|
8.96 g/t
|
240 koz
|
Inferred
|
In-Situ (UG)
|
1.901 Mt
|
Gold
|
9.2 g/t
|
563 koz
|
Total Resource
|
Stockpiles
|
0.011 Mt
|
Gold
|
2.81 g/t
|
1 koz
|
Total Resource
|
In-Situ (UG)
|
2.723 Mt
|
Gold
|
9.15 g/t
|
802 koz
|
Total Resource
|
Total
|
2.734 Mt
|
Gold
|
9.13 g/t
|
802 koz
|
Commodity Production Costs:
| Commodity | Units | 2021 | 2020 |
Total cash costs
|
Gold
|
USD
|
......
|
......
|
All-in sustaining costs (AISC)
|
Gold
|
USD
|
......
|
......
|
^ Guidance / Forecast.
† Net of By-Product.
Operating Costs:
| Units | 2020 | 2019 | 2018 | 2017 | 2016 |
Processing costs ($/t milled)
|
USD
| 17.5 | 22.2 | 20.5 | 17.1 | 13.2 |
Financials:
| Units | 2021 | 2020 | 2019 | 2018 | 2017 |
Capital expenditures (planned)
|
M USD
| ...... | |
|
|
|
Sustaining costs
|
M USD
| | ...... |
......
|
10.6
|
15
|
Capital expenditures
|
M USD
| | ...... |
......
|
10.6
|
15
|
Revenue
|
M USD
| | ...... |
......
|
52.8
|
50.2
|
Corporate Filings & Presentations:
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