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v3.21.2

Derivatives (Tables) | 9 Months Ended
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Sep. 30, 2021
Derivatives |
Summary of unsettled sales contracts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gold | ​ | Silver | ​ | Copper | ​ | Lead | ​ | Zinc | ​ | ​ | Total
​ | ​ | (ounces) | ​ | (ounces) | ​ | (tonnes) | ​ | (tonnes) | ​ | (tonnes) | ​ | ​ | ​
Under contract | ​ | ​ | 2,579 | ​ | ​ | 118,576 | ​ | ​ | 146 | ​ | ​ | 740 | ​ | ​ | 3,148 | ​ | ​ | ​
Average forward price (per ounce or tonne) | ​ | $ | 1,770 | ​ | $ | 23.07 | ​ | $ | 9,324 | ​ | $ | 2,261 | ​ | $ | 2,988 | ​ | ​ | ​
Unsettled sales contracts value (in thousands) | ​ | $ | 4,565 | ​ | $ | 2,736 | ​ | $ | 1,361 | ​ | $ | 1,673 | ​ | $ | 9,406 | ​ | $ | 19,741

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