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Exploration in non-operating areas (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Exploration In Non-Operating Areas [Abstract] |
Disclosure of detailed information about exploration in non-operating units [Text Block] | This caption is made up as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Services provided by third parties |  |  | 22,764 |  |  |  | 5,401 |  |  |  | 13,629 |
Personnel expenses |  |  | 4,830 |  |  |  | 4,064 |  |  |  | 3,908 |
Lands |  |  | 1,867 |  |  |  | 1,781 |  |  |  | - |
Rentals |  |  | 1,524 |  |  |  | 1,171 |  |  |  | 578 |
Consumption of materials and supplies |  |  | 1,420 |  |  |  | 582 |  |  |  | 768 |
Other expenses |  |  | 3,902 |  |  |  | 5,263 |  |  |  | 7,706 |
|  |  | 36,307 |  |  |  | 18,262 |  |  |  | 26,589 |

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- Definition The disclosure of detailed information about exploration in non-operating units. + References No definition available. + Details
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- References No definition available. + Details
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