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Property, plant and equipment, net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | $ 1,949,555 | $ 1,960,025 |
Balance as of December |  | 1,847,615 | 1,949,555 | $ 1,960,025
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 855,881 | 794,831 |
Balance as of December |  | 840,454 | 855,881 | 794,831
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 5,678,424 | 5,807,740 |
Balance as of December |  | 5,602,902 | 5,678,424 | 5,807,740
Asset retirement and mine closure cost asset [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Additions |  | 27,200 | 97,000 |
Accumulated depreciation and amortisation [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 3,384,730 | 3,389,171 |
Additions |  | 152,027 | 83,992 |
Sales and disposals |  | (67,998) | (88,433) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 3,468,759 | 3,384,730 | 3,389,171
Accumulated depreciation and amortisation [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 2,080,446 | 1,630,715 |
Additions |  | 511,344 | 455,513 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | (28,040) | (5,782) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 2,563,750 | 2,080,446 | 1,630,715
Accumulated depreciation and amortisation [member] | Land improvement [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 35,143 | 35,053 |
Additions |  | 440 | 90 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 35,583 | 35,143 | 35,053
Accumulated depreciation and amortisation [member] | Buildings and constructions [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 240,348 | 235,340 |
Additions |  | 7,631 | 5,020 |
Sales and disposals |  | 0 | (12) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 247,979 | 240,348 | 235,340
Accumulated depreciation and amortisation [member] | Buildings and constructions [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 229,627 | 144,862 |
Additions |  | 96,623 | 86,391 |
Adjustments and reclassifications |  | 5,184 | (457) |
Sales and disposals |  | (9,514) | (1,169) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 321,920 | 229,627 | 144,862
Accumulated depreciation and amortisation [member] | Machinery [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 249,975 | 329,965 |
Additions |  | 20,887 | 8,431 |
Sales and disposals |  | (66,607) | (88,421) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 204,255 | 249,975 | 329,965
Accumulated depreciation and amortisation [member] | Machinery [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 1,517,337 | 1,237,979 |
Additions |  | 292,656 | 283,250 |
Adjustments and reclassifications |  | (5,184) | 457 |
Sales and disposals |  | (18,483) | (4,349) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 1,786,326 | 1,517,337 | 1,237,979
Accumulated depreciation and amortisation [member] | Leach pads [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 1,621,266 | 1,588,205 |
Additions |  | 34,736 | 33,061 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 1,656,002 | 1,621,266 | 1,588,205
Accumulated depreciation and amortisation [member] | Vehicles [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 11,024 | 11,003 |
Additions |  | 2 | 21 |
Sales and disposals |  | (1,171) | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 9,855 | 11,024 | 11,003
Accumulated depreciation and amortisation [member] | Vehicles [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 12,221 | 10,865 |
Additions |  | 1,784 | 1,593 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | (33) | (237) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 13,972 | 12,221 | 10,865
Accumulated depreciation and amortisation [member] | Fixtures and fittings [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 2,556 | 2,556 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 2,556 | 2,556 | 2,556
Accumulated depreciation and amortisation [member] | Fixtures and fittings [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 834 | 802 |
Additions |  | 24 | 32 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 858 | 834 | 802
Accumulated depreciation and amortisation [member] | Other property, plant and equipment [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 55,914 | 55,645 |
Additions |  | 828 | 269 |
Sales and disposals |  | (220) | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 56,522 | 55,914 | 55,645
Accumulated depreciation and amortisation [member] | Other property, plant and equipment [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 16,400 | 13,953 |
Additions |  | 2,406 | 2,474 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | (10) | (27) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 18,796 | 16,400 | 13,953
Accumulated depreciation and amortisation [member] | Mining property [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 29,457 | 29,457 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 29,457 | 29,457 | 29,457
Accumulated depreciation and amortisation [member] | Asset retirement and mine closure cost asset [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 356,345 | 337,173 |
Additions |  | 67,663 | 19,172 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 424,008 | 356,345 | 337,173
Accumulated depreciation and amortisation [member] | Stripping activity asset [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 143,252 | 142,170 |
Additions |  | 2,806 | 1,082 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 146,058 | 143,252 | 142,170
Accumulated depreciation and amortisation [member] | Stripping activity asset [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 285,327 | 209,065 |
Additions |  | 112,875 | 76,262 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 398,202 | 285,327 | 209,065
Accumulated depreciation and amortisation [member] | Mine developments [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 639,450 | 622,604 |
Additions |  | 17,034 | 16,846 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 656,484 | 639,450 | 622,604
Accumulated depreciation and amortisation [member] | Asset retirement costs [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 18,700 | 13,189 |
Additions |  | 4,976 | 5,511 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 23,676 | 18,700 | 13,189
Gross carrying amount [member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 3,596,342 | 3,501,216 |
Additions |  | 172,509 | 277,824 |
Sales and disposals |  | (9,725) |  | (18,056)
Balance as of December |  | 3,727,403 | 3,596,342 | 3,501,216
Gross carrying amount [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 4,240,611 | 4,184,002 |
Additions |  | 144,911 | 148,950 |
Sales and disposals |  | (73,878) | (92,341) |
Transfer/Other changes |  | (2,431) | 0 |
Balance as of December |  | 4,309,213 | 4,240,611 | 4,184,002
Gross carrying amount [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 7,758,870 | 7,438,455 |
Additions |  | 468,912 | 330,129 |
Adjustments and reclassifications |  | (32,017) | (3,710) |
Sales and disposals |  | (29,113) | (6,004) |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 8,166,652 | 7,758,870 | 7,438,455
Gross carrying amount [member] | Land [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 22,690 | 22,958 |
Additions |  | 783 | 0 |
Sales and disposals |  | (462) |  | 0
Balance as of December |  | 21,761 | 22,690 | 22,958
Gross carrying amount [member] | Land [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 9,459 | 9,459 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 9,459 | 9,459 | 9,459
Gross carrying amount [member] | Land [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 24,467 | 23,683 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 196 | 784 |
Balance as of December |  | 24,663 | 24,467 | 23,683
Gross carrying amount [member] | Land improvement [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 36,454 | 36,454 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 |  |
Balance as of December |  | 36,454 | 36,454 | 36,454
Gross carrying amount [member] | Buildings and constructions [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 297,798 | 236,551 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | (42) |
Transfer/Other changes |  | 530 | 61,289 |
Balance as of December |  | 298,328 | 297,798 | 236,551
Gross carrying amount [member] | Buildings and constructions [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 2,370,042 | 2,376,961 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | 41,089 | (13,532) |
Sales and disposals |  | (9,644) | (1,169) |
Transfer/Other changes |  | 48,090 | 7,782 |
Balance as of December |  | 2,449,577 | 2,370,042 | 2,376,961
Gross carrying amount [member] | Machinery [member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 929,023 | 986,032 |
Additions |  | 0 | 2,579 |
Sales and disposals |  | (182) |  | (3,749)
Balance as of December |  | 958,466 | 929,023 | 986,032
Gross carrying amount [member] | Machinery [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 286,865 | 379,164 |
Additions |  | 0 | 0 |
Sales and disposals |  | (72,442) | (92,299) |
Transfer/Other changes |  | 30,137 | 0 |
Balance as of December |  | 244,560 | 286,865 | 379,164
Gross carrying amount [member] | Machinery [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 4,553,508 | 4,442,180 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | (41,089) | 13,532 |
Sales and disposals |  | (19,426) | (4,540) |
Transfer/Other changes |  | 201,057 | 102,336 |
Balance as of December |  | 4,694,050 | 4,553,508 | 4,442,180
Gross carrying amount [member] | Leach pads [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 1,722,786 | 1,670,835 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 484 | 51,951 |
Balance as of December |  | 1,723,270 | 1,722,786 | 1,670,835
Gross carrying amount [member] | Vehicles [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 9,946 | 10,416 |
Additions |  | 42 | 11 |
Sales and disposals |  | (138) |  | (190)
Balance as of December |  | 10,885 | 9,946 | 10,416
Gross carrying amount [member] | Vehicles [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 11,024 | 11,024 |
Additions |  | 0 | 0 |
Sales and disposals |  | (1,171) | 0 |
Transfer/Other changes |  | 68 | 0 |
Balance as of December |  | 9,921 | 11,024 | 11,024
Gross carrying amount [member] | Vehicles [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 20,557 | 19,110 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | (32) | (261) |
Transfer/Other changes |  | 2,726 | 1,708 |
Balance as of December |  | 23,251 | 20,557 | 19,110
Gross carrying amount [member] | Fixtures and fittings [member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 13,902 | 14,047 |
Additions |  | 0 | 31 |
Sales and disposals |  | 0 |  | (157)
Balance as of December |  | 13,306 | 13,902 | 14,047
Gross carrying amount [member] | Fixtures and fittings [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 2,556 | 2,556 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 2,556 | 2,556 | 2,556
Gross carrying amount [member] | Fixtures and fittings [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 949 | 949 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 949 | 949 | 949
Gross carrying amount [member] | Other property, plant and equipment [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 57,773 | 57,773 |
Additions |  | 0 | 0 |
Sales and disposals |  | (265) | 0 |
Transfer/Other changes |  | 1,416 | 0 |
Balance as of December |  | 58,924 | 57,773 | 57,773
Gross carrying amount [member] | Other property, plant and equipment [member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 24,977 | 24,671 |
Additions |  | 0 | 0 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | (11) | (34) |
Transfer/Other changes |  | 525 | 340 |
Balance as of December |  | 25,491 | 24,977 | 24,671
Gross carrying amount [member] | Construction in Progress [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 101,122 | 105,788 |
Additions |  | 67,096 | 173,333 |
Sales and disposals |  | (3,450) |  | 0
Balance as of December |  | 56,662 | 101,122 | 105,788
Gross carrying amount [member] | Construction in Progress [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 400,410 | 483,225 |
Additions |  | 117,636 | 51,624 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | (73,358) | (134,439) |
Balance as of December |  | 444,688 | 400,410 | 483,225
Gross carrying amount [member] | Construction in Progress [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 149,661 | 88,766 |
Additions |  | 288,861 | 173,845 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | (252,594) | (112,950) |
Balance as of December |  | 185,928 | 149,661 | 88,766
Gross carrying amount [member] | Mining property [member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 37,521 | 37,521 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 37,521 | 37,521 | 37,521
Gross carrying amount [member] | Asset retirement and mine closure cost asset [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 507,123 | 409,797 |
Additions |  | 27,275 | 97,326 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 534,398 | 507,123 | 409,797
Gross carrying amount [member] | Stripping activity asset [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance | [1] | 130,447 | 124,467 |
Additions | [1] | 11,279 | 18,282 |
Sales and disposals | [1] | 0 |  | (13,573)
Balance as of December | [1] | 141,726 | 130,447 | 124,467
Gross carrying amount [member] | Stripping activity asset [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 148,487 | 148,487 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 148,487 | 148,487 | 148,487
Gross carrying amount [member] | Stripping activity asset [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 478,382 | 324,759 |
Additions |  | 177,327 | 153,623 |
Adjustments and reclassifications |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | 655,709 | 478,382 | 324,759
Gross carrying amount [member] | Mine developments [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 722,355 | 701,156 |
Additions |  | 0 | 0 |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 38,292 | 21,199 |
Balance as of December |  | 760,647 | 722,355 | 701,156
Gross carrying amount [member] | Asset retirement costs [Member] | Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Property, plant and equipments,net [Line Items] |  |  |  |
Opening balance |  | 136,327 | 137,376 |
Additions |  | 2,724 | 2,661 |
Adjustments and reclassifications |  | (32,017) | (3,710) |
Sales and disposals |  | 0 | 0 |
Transfer/Other changes |  | 0 | 0 |
Balance as of December |  | $ 107,034 | $ 136,327 | $ 137,376
[1] | In mid-2016, a landslide occurred in the west wall of the Tajo Norte; consequently, it was decided not to mine this area due to stability and operational design issues. According to the distribution of reserves, this area (Phase 10) contained 5.5 MT of ore and 9.2 MT of waste valued at US$13,573,000, which were withdrawn from the reserves in the year 2017.

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- References No definition available. + Details
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Namespace Prefix: | cik0001013131_
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Period Type: | duration

X
- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_i&doctype=Standard -URIDate 2018-03-16 + Details
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