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Exploration in non-operating areas (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | $ 13,452 | $ 14,252 | $ 11,270
Services provided by third parties |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 6,640 | 6,324 | 4,742
Personnel expenses |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 2,982 | 2,898 | 2,748
Lands |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 982 | 1,190 | 967
Short-term and low-value lease |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 368 | 917 | 612
Laboratory analysis and tests |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 376 | 862 | 508
Professional fees |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 386 | 557 | 439
Consumption of materials and supplies |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 698 | 467 | 251
Transport |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | 244 | 173 | 191
Other |  |  |
Disclosure Of Exploration In Non-Operating Areas [Line Items] |  |  |
Expense arising from exploration for and evaluation of non operating units | $ 776 | $ 864 | $ 812

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