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ACQUISITIONS AND DISPOSITIONS - Chulbatkan (Details) oz in Thousands, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 15, 2021 USD ($) | Jan. 16, 2020 USD ($) oz $ / oz | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Acquisitions and Dispositions |  |  |  |
Cash consideration paid |  |  | $ 267.0 | $ 30.0
Transaction costs |  |  | $ 4.4 |
Purchase price allocation |  |  |  |
Total net assets acquired |  | $ 290.5 |  |
Chulbatkan license |  |  |  |
Acquisitions and Dispositions |  |  |  |
Consideration |  | $ 283.0 |  |
Royalty obligation |  | 1.50% |  |
Future proven and probable reserves per ounce | $ / oz |  | 50 |  |
Declared proven and probable ounces | oz |  | 3,250 |  |
Percentage of payment on net smelter return royalty |  | 1.50% |  |
Buyback right |  | 0.33 |  |
Right to buyback royalty |  | $ 10.0 |  |
Period for buyback |  | 24 months |  |
Cash consideration paid | $ 141.5 | $ 141.5 |  |
Percentage of consideration paid in first installment |  | 50.00% |  |
Final installment which can paid in cash (as percent) |  | 100.00% |  |
Increase (decrease) in working capital |  | $ 3.1 |  |
Purchase price allocation |  |  |  |
Property, plant and equipment (including mineral interests) |  | 286.9 |  |
Net working capital |  | 3.6 |  |
Total net assets acquired |  | $ 290.5 |  |
Chulbatkan license | Minimum |  |  |  |
Acquisitions and Dispositions |  |  |  |
Option, which was not executed, to pay installment with shares (as a percent) |  | 60.00% |  |
Chulbatkan license | Maximum |  |  |  |
Acquisitions and Dispositions |  |  |  |
Option, which was not executed, to pay installment with shares (as a percent) |  | 100.00% |  |
Pre-development properties | Chulbatkan license |  |  |  |
Purchase price allocation |  |  |  |
Property, plant and equipment (including mineral interests) |  | $ 278.9 |  |
Land, plant and equipment | Chulbatkan license |  |  |  |
Purchase price allocation |  |  |  |
Property, plant and equipment (including mineral interests) |  | $ 8.0 |  |

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