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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 USD ($) item t segment $ / lb | Dec. 31, 2022 $ / lb | Dec. 31, 2020 $ / lb
Significant Accounting Policies |  |  |
Increase in total reserves at a property to qualify as a major expansion (as a percent) | 10.00% |  |
Current price of copper (in dollars per pound) | $ / lb | 3.30 | 3.30 | 2.816
Impairment in the carrying value of long-term assets | $ | $ 0 |  |
Number of reportable segments | segment | 3 |  |
Copper concentrates |  |  |
Significant Accounting Policies |  |  |
Long-term contracts with promises to deliver mineral | 185,000 |  |
Copper cathodes |  |  |
Significant Accounting Policies |  |  |
Long-term contracts with promises to deliver mineral | 48,000 |  |
Molybdenum concentrates |  |  |
Significant Accounting Policies |  |  |
Long-term contracts with promises to deliver mineral | 18,830 |  |
Sulfuric acid |  |  |
Significant Accounting Policies |  |  |
Long-term contracts with promises to deliver mineral | 330,000 |  |
Minimum |  |  |
Financial information related to segments |  |  |
Estimated useful lives of buildings and equipment | 2 years |  |
Significant Accounting Policies |  |  |
Percentage of metal production sold under annual or longer-term contracts | 80.00% |  |
Maximum |  |  |
Financial information related to segments |  |  |
Maximum period after shipping within which pricing is based by customer contracts in most cases | 3 months |  |
Estimated useful lives of buildings and equipment | 50 years |  |
Significant Accounting Policies |  |  |
Percentage of metal production sold under annual or longer-term contracts | 90.00% |  |
Peruvian Operations |  |  |
Financial information related to segments |  |  |
Number of open-pit copper mines | item | 2 |  |
Mexican IMMSA Unit |  |  |
Financial information related to segments |  |  |
Number of underground poly metal mines | item | 5 |  |

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