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Property, Plant and Mine Development, net - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Property, Plant and Mine Development, net |  |
Depreciation and amortization expense | $ 28.0 | $ 16.1
Asset retirement costs | $ 6.4 |

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