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Property, plant, equipment and development costs - Estimates prices for the current and long-term periods (Details) | Dec. 31, 2023 $ / t $ / oz | Dec. 31, 2022 $ / oz $ / t
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Less than 1 year | Gold per ounce [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | $ / oz | 1,900 | 1,750
Less than 1 year | Silver [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | $ / oz | 23 | 21
Less than 1 year | Copper [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 8,500 | 7,900
Less than 1 year | Lead [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 2,050 | 1,900
Less than 1 year | Zinc [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 2,600 | 3,000
Between 1 and 2 years | Gold per ounce [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | $ / oz | 2,036 | 1,735
Between 1 and 2 years | Silver [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | $ / oz | 27 | 23.17
Between 1 and 2 years | Copper [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 10,822 | 9,625
Between 1 and 2 years | Lead [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 2,449 | 2,181
Between 1 and 2 years | Zinc [Member] |  |
Property, plant, equipment and development costs |  |
Commodity price estimates | 3,071 | 2,648

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