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Derivative instruments - Provisionally priced sales (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | $ 2.1 | $ (7.4)
Unrealized | 0.6 | 2.3
Total gain (loss) | 2.7 | (5.1)
Gold |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | 1.5 | (1.0)
Unrealized | 0.4 | 0.7
Total gain (loss) | 1.9 | (0.3)
Copper |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | 0.6 | (6.4)
Unrealized | 0.2 | 1.6
Total gain (loss) | $ 0.8 | $ (4.8)

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- Definition The gains (losses) on the provisionally pricing of concentrate sales which realised during the reporting period. + References No definition available. + Details
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- Definition Totals gains (losses) on the provisionally pricing of concentrate sales which recognised during the reporting period. + References No definition available. + Details
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- Definition The gains (losses) on the provisionally pricing of concentrate sales which recognised as unrealised during the reporting period. + References No definition available. + Details
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