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COST OF SALES (Schedule of Cost of Sales) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
COST OF SALES [abstract]    
Direct mining costs $ 297,322 $ 272,329
Salaries and benefits 75,088 44,432
Workers' participation 1,422 4,285
Depletion and depreciation 216,250 171,447
Royalties and other taxes 46,036 33,304
Other 16,285 8,898
Cost of sales 652,403 534,695
Depletion and depreciation, right-of-use $ 13,900 $ 9,000