Overview
Status | Care and Maintenance |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Cut & Fill
- Shrinkage stoping
|
Production Start | ...  |
Mine Life | 5 years (as of Jan 1, 2021) |
Contonga was placed on care and maintenance in 2019. Agreement has been reached to sell Contonga to a third party, with closing expected in 2022. |
Source:
p. 25
Contractors
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Summary:
The Contonga mine is an underground polymetallic operation with more than 27 years of mining history. The mine site is located in the Central Peruvian Andes, 470 kilometres north-east of Lima, Peru. At the Contonga mine, vertically zoned mineralization of skarn replacement is controlled by bedding orientation. Faulting occurs predominantly in strongly folded limestone, which surrounds the well-defined Contonga stock.
The polymetallic province of central Peru forms a 120-km-wide-800-km-1ong belt which corresponds with the western Cordillera and the high plateaus of the Andes between 7 and 14". Polymetallic vein and Skarn deposits associated with Cenozoic magmatism are the principal metal producers (they account for 70, 87, and 96% of Zn, Pb, and Ag production respectively), but stratabound deposits have gained in importance during the past 20 years, mainly as Zn providers; currently they account for 30, 13, and 4% of Zn, Pb, and Ag production respectively. Two principal sedimentary metallotects have been identified.
The variety in ages and types of polymetallic deposits made this province an especially attractive target for a comprehensive study of the distribution of minor and trace elements such as Ag, Bi, Cd, In, Ge, Ga, Sn, etc. in polymetallic ores on a regional scale.
Mining Methods
- Cut & Fill
- Shrinkage stoping
Summary:
Source:
Flow Sheet:

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Reserves at December 31, 2019:
The Mineral Resources as at 31th December 2021 at Contonga mine are unchanged from 31 December 2020.
Category | Tonnage | Commodity | Grade |
Proven
|
0.3 Mt
|
Zinc
|
3.3 %
|
Proven
|
0.3 Mt
|
Lead
|
0.8 %
|
Proven
|
0.3 Mt
|
Copper
|
0.8 %
|
Proven
|
0.3 Mt
|
Silver
|
55 g/t
|
Probable
|
0.8 Mt
|
Zinc
|
3.4 %
|
Probable
|
0.8 Mt
|
Lead
|
1.2 %
|
Probable
|
0.8 Mt
|
Copper
|
0.5 %
|
Probable
|
0.8 Mt
|
Silver
|
63 g/t
|
Proven & Probable
|
1.2 Mt
|
Zinc
|
3.4 %
|
Proven & Probable
|
1.2 Mt
|
Lead
|
1.1 %
|
Proven & Probable
|
1.2 Mt
|
Copper
|
0.6 %
|
Proven & Probable
|
1.2 Mt
|
Silver
|
61 g/t
|
Measured
|
2.5 Mt
|
Zinc
|
3.3 %
|
Measured
|
2.5 Mt
|
Lead
|
0.5 %
|
Measured
|
2.5 Mt
|
Copper
|
0.8 %
|
Measured
|
2.5 Mt
|
Silver
|
50 g/t
|
Indicated
|
5 Mt
|
Zinc
|
2.9 %
|
Indicated
|
5 Mt
|
Lead
|
0.8 %
|
Indicated
|
5 Mt
|
Copper
|
0.5 %
|
Indicated
|
5 Mt
|
Silver
|
52 g/t
|
Measured & Indicated
|
7.5 Mt
|
Zinc
|
3 %
|
Measured & Indicated
|
7.5 Mt
|
Lead
|
0.7 %
|
Measured & Indicated
|
7.5 Mt
|
Copper
|
0.8 %
|
Measured & Indicated
|
7.5 Mt
|
Silver
|
55 g/t
|
Inferred
|
4.4 Mt
|
Zinc
|
2 %
|
Inferred
|
4.4 Mt
|
Lead
|
1 %
|
Inferred
|
4.4 Mt
|
Copper
|
1 %
|
Inferred
|
4.4 Mt
|
Silver
|
49 g/t
|
Operating Costs:
| Units | 2015 |
Direct operating costs ($/t milled)
|
USD
| 73 |
Mine Management:
Job Title | Name | Profile | Ref. Date |
.......................
|
.......................
|
|
May 5, 2022
|
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