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Disclosure of information on segments (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Operating income      
Sales of goods $ 810,961,000 $ 801,199,000 $ 863,470,000
Sale of services 12,884,000 22,222,000 21,052,000
Royalty income 0 1,381,000 15,928,000
Total operating income 823,845,000 824,802,000 900,450,000
Operating costs      
Cost of sales, excluding depreciation and amortization (457,354,000) (461,942,000) (529,731,000)
Unabsorbed cost due to production stoppage (19,893,000) (23,058,000) (25,509,000)
Cost of services 6,243,000 (3,163,000) 1,269,000
Exploration in operating units (49,229,000) (80,796,000) (56,412,000)
Depreciation and amortization (181,039,000) (176,781,000) (187,211,000)
Mining royalties (18,839,000) (17,733,000) (12,974,000)
Total operating costs (732,597,000) (763,473,000) (813,106,000)
Gross profit (loss) 91,248,000 61,329,000 87,344,000
Operating expenses, net      
Administrative expenses (69,183,000) (67,728,000) (67,585,000)
Selling expenses (19,392,000) (20,222,000) (20,827,000)
Write-off of stripping activity asset 0 0 (6,763,000)
Exploration in non-operating areas (13,452,000) (14,252,000) (11,270,000)
Reversal (provision) of contingencies and others 6,927,000 (2,935,000) (2,687,000)
Impairment recovery (loss) of long-lived assets   19,874,000 (14,910,000)
Other, net 24,973,000 (15,085,000) (29,260,000)
Total operating expenses, net (70,127,000) (100,348,000) (153,302,000)
Operating profit (loss) 21,121,000 (39,019,000) (65,958,000)
Other income (expense),net      
Finance income 9,057,000 14,443,000 5,952,000
Foreign currency exchange difference 19,375,000 26,871,000 (18,686,000)
Share in the results of associates and joint ventures 152,225,000 176,270,000 240,450,000
Finance costs (119,254,000) (54,136,000) (60,629,000)
Profit (loss) before income tax 82,524,000 124,429,000 101,129,000
Income tax expense (42,994,000) (41,000) 23,671,000
Current income tax (69,306,000) (15,633,000) (20,375,000)
Deferred Income tax 26,312,000 15,592,000 44,046,000
Profit (loss) from continued operations 39,530,000 124,388,000 124,800,000
Loss per basic share (6,848,000) 478,547,000 (387,604,000)
Profit for the year 32,682,000 602,935,000 (262,804,000)
Total assets 4,533,799,000 4,503,227,000 4,561,811,000
Total liability 1,364,588,000 1,340,286,000 2,023,280,000
Other segment information      
Investments in associates 1,527,123,000 1,520,977,000 1,422,295,000
Acquisition of long-lived assets 238,669,000 151,973,000 90,309,000
Changes in estimates of mine closures plans 11,879,000 (21,869,000) (3,272,000)
Exploration and development mining projects [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 0 0 0
Royalty income   0 0
Total operating income 0 0 0
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 0 0
Operating expenses, net      
Administrative expenses (1,682,000) (1,528,000) (1,447,000)
Selling expenses 0 0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas (1,149,000) (282,000) (1,011,000)
Reversal (provision) of contingencies and others (194,000) 108,000 132,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net (3,750,000) (931,000) (371,000)
Total operating expenses, net (6,775,000) (2,633,000) (2,697,000)
Operating profit (loss) (6,775,000) (2,633,000) (2,697,000)
Other income (expense),net      
Finance income 13,000 11,000 0
Foreign currency exchange difference 307,000 604,000 (1,210,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (517,000) (297,000) (238,000)
Profit (loss) before income tax (6,972,000) (2,315,000) (4,145,000)
Income tax expense 0 0 0
Current income tax 0 0 0
Deferred Income tax 0 0 0
Profit (loss) from continued operations (6,972,000) (2,315,000) (4,145,000)
Total assets 694,950,000 496,198,000 442,335,000
Total liability 59,476,000 21,844,000 21,764,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 150,198,000 46,459,000 22,513,000
Changes in estimates of mine closures plans 0 (6,576,000) (679,000)
Energy generation and transmission [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 53,025,000 52,433,000 53,083,000
Royalty income   0 0
Total operating income 53,025,000 52,433,000 53,083,000
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 34,852,000 (24,861,000) 20,781,000
Exploration in operating units 0 0 0
Depreciation and amortization (9,037,000) (9,040,000) (8,995,000)
Mining royalties 0 0 0
Total operating costs (43,889,000) (33,901,000) (29,776,000)
Gross profit (loss) 9,136,000 18,532,000 23,307,000
Operating expenses, net      
Administrative expenses (2,377,000) (2,948,000) (2,942,000)
Selling expenses (748,000) (770,000) (740,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 83,000 (440,000) 111,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net 56,000 (196,000) 134,000
Total operating expenses, net (2,986,000) (4,354,000) (3,437,000)
Operating profit (loss) 6,150,000 14,178,000 19,870,000
Other income (expense),net      
Finance income 1,142,000 394,000 124,000
Foreign currency exchange difference 24,000 (207,000) (377,000)
Share in the results of associates and joint ventures 1,962,000 7,008,000 20,525,000
Finance costs (4,178,000) (5,337,000) (4,731,000)
Profit (loss) before income tax 5,100,000 16,036,000 35,411,000
Income tax expense (501,000) (2,433,000) 5,692,000
Current income tax (1,912,000) (3,238,000) (1,132,000)
Deferred Income tax 1,411,000 805,000 6,824,000
Profit (loss) from continued operations 4,599,000 13,603,000 41,103,000
Total assets 367,130,000 377,679,000 385,626,000
Total liability 116,398,000 131,540,000 153,090,000
Other segment information      
Investments in associates 123,610,000 121,650,000 99,352,000
Acquisition of long-lived assets 1,168,000 1,487,000 754,000
Changes in estimates of mine closures plans 0 0 0
Insurance brokerage [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 8,099,000 17,207,000 15,651,000
Royalty income   0 0
Total operating income 8,099,000 17,207,000 15,651,000
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 8,099,000 17,207,000 15,651,000
Operating expenses, net      
Administrative expenses (11,440,000) (12,694,000) (11,796,000)
Selling expenses 0 0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 0 0 0
Impairment recovery (loss) of long-lived assets   0 0
Other, net 0 0 0
Total operating expenses, net (11,440,000) (12,694,000) (11,796,000)
Operating profit (loss) (3,341,000) 4,513,000 3,855,000
Other income (expense),net      
Finance income 5,000 0 0
Foreign currency exchange difference 0 (45,000) 397,000
Share in the results of associates and joint ventures 0 0 (15,000)
Finance costs (27,000) (48,000) (52,000)
Profit (loss) before income tax (3,363,000) 4,420,000 4,185,000
Income tax expense 970,000 (1,186,000) (1,603,000)
Current income tax (8,000) (1,197,000) (1,673,000)
Deferred Income tax 978,000 11,000 70,000
Profit (loss) from continued operations (2,393,000) 3,234,000 2,582,000
Total assets 0 14,436,000 19,152,000
Total liability 0 6,107,000 6,343,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 0 25,000 139,000
Changes in estimates of mine closures plans 0 0 0
Rental of mining concessions [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 0 0 0
Royalty income   1,381,000 15,928,000
Total operating income 0 1,381,000 15,928,000
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 1,381,000 15,928,000
Operating expenses, net      
Administrative expenses (186,000) (218,000) (242,000)
Selling expenses 0 0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 0 (98,000) 15,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net 8,551,000 8,162,000 34,000
Total operating expenses, net (8,365,000) (7,846,000) (193,000)
Operating profit (loss) 8,365,000 9,227,000 15,735,000
Other income (expense),net      
Finance income 56,000 5,000 0
Foreign currency exchange difference 10,000 1,000 (83,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (1,000) (2,000) (2,000)
Profit (loss) before income tax 8,430,000 9,231,000 15,650,000
Income tax expense (2,529,000) (2,714,000) (4,661,000)
Current income tax (2,529,000) (2,714,000) (4,661,000)
Deferred Income tax 0 0 0
Profit (loss) from continued operations 5,901,000 6,517,000 10,989,000
Total assets 4,854,000 3,306,000 4,927,000
Total liability 90,000 139,000 1,717,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 0 0 0
Changes in estimates of mine closures plans 0 0 0
Holding of investment in shares [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 441,000 421,000 551,000
Royalty income   0 0
Total operating income 441,000 421,000 551,000
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 441,000 421,000 551,000
Operating expenses, net      
Administrative expenses (365,000) (617,000) (1,687,000)
Selling expenses 0 0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 127,000 0 0
Impairment recovery (loss) of long-lived assets   0 0
Other, net 349,000 (2,472,000) (44,000)
Total operating expenses, net (111,000) (3,089,000) (1,731,000)
Operating profit (loss) 552,000 (2,668,000) (1,180,000)
Other income (expense),net      
Finance income 328,000 308,000 0
Foreign currency exchange difference 343,000 (693,000) (7,000)
Share in the results of associates and joint ventures 21,517,000 4,756,000 (411,974,000)
Finance costs (2,000) (29,000) (1,000)
Profit (loss) before income tax 22,738,000 1,674,000 (413,162,000)
Income tax expense (76,000) 1,182,000 (121,000)
Current income tax (76,000) 1,289,000 (121,000)
Deferred Income tax 0 (107,000) 0
Profit (loss) from continued operations 22,662,000 2,856,000 (413,283,000)
Total assets 232,177,000 231,820,000 261,803,000
Total liability 402,000 226,000 275,814,000
Other segment information      
Investments in associates 226,582,000 213,682,000 207,233,000
Acquisition of long-lived assets 0 3,000 0
Changes in estimates of mine closures plans 0 0 0
Industrial activities [Member]      
Operating income      
Sales of goods 18,224,000 53,073,000 47,024,000
Sale of services 1,508,000 0 13,876,000
Royalty income   0 0
Total operating income 19,732,000 53,073,000 60,900,000
Operating costs      
Cost of sales, excluding depreciation and amortization (17,783,000) (52,122,000) (46,811,000)
Unabsorbed cost due to production stoppage (3,927,000) (1,973,000) (1,050,000)
Cost of services 1,612,000 0 3,940,000
Exploration in operating units 0 0 0
Depreciation and amortization (6,082,000) (6,396,000) (11,569,000)
Mining royalties 0 0 0
Total operating costs (29,404,000) (60,491,000) (63,370,000)
Gross profit (loss) (9,672,000) (7,418,000) (2,470,000)
Operating expenses, net      
Administrative expenses (536,000) (442,000) (1,102,000)
Selling expenses (115,000) (177,000) (559,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 200,000 0 9,000
Impairment recovery (loss) of long-lived assets   19,874,000 (19,874,000)
Other, net (272,000) 321,000 (82,000)
Total operating expenses, net (723,000) (19,576,000) (21,608,000)
Operating profit (loss) (10,395,000) 12,158,000 (24,078,000)
Other income (expense),net      
Finance income 308,000 54,000 12,000
Foreign currency exchange difference 301,000 1,218,000 (1,824,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (6,000) (25,000) (98,000)
Profit (loss) before income tax (9,792,000) 13,405,000 (25,988,000)
Income tax expense 3,815,000 3,208,000 (1,692,000)
Current income tax 0 0 (291,000)
Deferred Income tax 3,815,000 3,208,000 (1,401,000)
Profit (loss) from continued operations (5,977,000) 16,613,000 (27,680,000)
Total assets 65,318,000 74,266,000 63,551,000
Total liability 5,346,000 7,981,000 13,920,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 157,000 265,000 1,744,000
Changes in estimates of mine closures plans 0 0 0
Corporates [Member]      
Operating income      
Sales of goods 0 0 0
Sale of services 0 0 0
Royalty income   0 0
Total operating income 0 0 0
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 0 0
Operating expenses, net      
Administrative expenses (5,140,000) (5,966,000) (4,534,000)
Selling expenses 0 0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas (3,828,000) (4,737,000) (3,100,000)
Reversal (provision) of contingencies and others 2,398,000 442,000 (436,000)
Impairment recovery (loss) of long-lived assets   0 0
Other, net 18,437,000 (6,090,000) (80,000)
Total operating expenses, net (11,867,000) (16,351,000) (8,150,000)
Operating profit (loss) 11,867,000 (16,351,000) (8,150,000)
Other income (expense),net      
Finance income 3,572,000 12,226,000 5,659,000
Foreign currency exchange difference 17,507,000 25,235,000 (9,542,000)
Share in the results of associates and joint ventures 152,371,000 164,823,000 236,593,000
Finance costs (98,961,000) (38,900,000) (45,719,000)
Profit (loss) before income tax 86,356,000 147,033,000 178,841,000
Income tax expense (26,273,000) 24,397,000 38,987,000
Current income tax (45,126,000) (731,000) 0
Deferred Income tax 18,853,000 25,128,000 38,987,000
Profit (loss) from continued operations 60,083,000 171,430,000 217,828,000
Total assets 2,917,237,000 3,047,322,000 3,016,730,000
Total liability 696,152,000 655,598,000 1,243,575,000
Other segment information      
Investments in associates 2,116,200,000 2,099,568,000 1,971,506,000
Acquisition of long-lived assets 5,898,000 500,000 1,122,000
Changes in estimates of mine closures plans 0 0 (35,000)
Uchucchacua      
Operating income      
Sales of goods 51,698,000 5,281,000 79,375,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 51,698,000 5,281,000 79,375,000
Operating costs      
Cost of sales, excluding depreciation and amortization (15,544,000) 0 (95,359,000)
Unabsorbed cost due to production stoppage (18,695,000) (24,916,000) (25,326,000)
Cost of services 0 0 0
Exploration in operating units (24,428,000) (32,592,000) (11,090,000)
Depreciation and amortization (6,279,000) (9,000,000) (14,083,000)
Mining royalties (268,000) (46,000) (998,000)
Total operating costs (65,214,000) (66,554,000) (146,856,000)
Gross profit (loss) (13,516,000) (61,273,000) (67,481,000)
Operating expenses, net      
Administrative expenses (4,512,000) (651,000) (6,758,000)
Selling expenses (3,343,000) (3,634,000) (3,738,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas (476,000) (15,000) (65,000)
Reversal (provision) of contingencies and others 1,122,000 (44,000) (1,291,000)
Impairment recovery (loss) of long-lived assets   0 0
Other, net (2,435,000) 2,453,000 (7,865,000)
Total operating expenses, net (9,644,000) (1,891,000) (19,717,000)
Operating profit (loss) (23,160,000) (63,164,000) (87,198,000)
Other income (expense),net      
Finance income 28,000 12,000 0
Foreign currency exchange difference 112,000 (290,000) (2,010,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (917,000) (496,000) (431,000)
Profit (loss) before income tax (23,937,000) (63,938,000) (89,639,000)
Income tax expense (538,000) (19,000) (57,000)
Current income tax (538,000) (19,000) (57,000)
Deferred Income tax 0 0 0
Profit (loss) from continued operations (24,475,000) (63,957,000) (89,696,000)
Total assets 222,041,000 127,479,000 111,885,000
Total liability 62,003,000 55,792,000 62,279,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 14,353,000 32,000,000 16,109,000
Changes in estimates of mine closures plans 2,094,000 (3,107,000) (517,000)
Orcopampa      
Operating income      
Sales of goods 163,308,000 134,268,000 89,567,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 163,308,000 134,268,000 89,567,000
Operating costs      
Cost of sales, excluding depreciation and amortization (73,774,000) (58,108,000) (56,183,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (6,071,000) (11,594,000) (11,466,000)
Depreciation and amortization (12,625,000) (7,757,000) (8,409,000)
Mining royalties (14,307,000) (12,220,000) (7,636,000)
Total operating costs (106,777,000) (89,679,000) (83,694,000)
Gross profit (loss) 56,531,000 44,589,000 5,873,000
Operating expenses, net      
Administrative expenses (15,975,000) (12,406,000) (7,649,000)
Selling expenses (671,000) (560,000) (401,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others (183,000) 544,000 70,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net (899,000) 124,000 (501,000)
Total operating expenses, net (17,728,000) (12,298,000) (8,481,000)
Operating profit (loss) 38,803,000 32,291,000 (2,608,000)
Other income (expense),net      
Finance income 4,000 2,000 0
Foreign currency exchange difference 76,000 99,000 (129,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (1,791,000) (546,000) (493,000)
Profit (loss) before income tax 37,092,000 31,846,000 (3,230,000)
Income tax expense (678,000) (465,000) (65,000)
Current income tax (678,000) (465,000) (65,000)
Deferred Income tax 0 0 0
Profit (loss) from continued operations 36,414,000 31,381,000 (3,295,000)
Total assets 49,707,000 62,083,000 47,734,000
Total liability 56,185,000 52,429,000 48,659,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 3,624,000 3,584,000 2,983,000
Changes in estimates of mine closures plans (123,000) 5,112,000 (390,000)
Julcani [Member]      
Operating income      
Sales of goods 37,179,000 54,573,000 56,065,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 37,179,000 54,573,000 56,065,000
Operating costs      
Cost of sales, excluding depreciation and amortization (32,213,000) (30,215,000) (31,319,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (6,990,000) (6,747,000) (6,107,000)
Depreciation and amortization (6,693,000) (6,444,000) (6,849,000)
Mining royalties (367,000) (472,000) (599,000)
Total operating costs (46,263,000) (43,878,000) (44,874,000)
Gross profit (loss) (9,084,000) 10,695,000 11,191,000
Operating expenses, net      
Administrative expenses (3,993,000) (5,028,000) (4,737,000)
Selling expenses (239,000) (389,000) (480,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 1,409,000 (1,776,000) 320,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net (1,074,000) (793,000) (844,000)
Total operating expenses, net (3,897,000) (7,986,000) (5,741,000)
Operating profit (loss) (12,981,000) 2,709,000 5,450,000
Other income (expense),net      
Finance income 0 4,000 0
Foreign currency exchange difference 77,000 100,000 (612,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (1,103,000) (382,000) (484,000)
Profit (loss) before income tax (14,007,000) 2,431,000 4,354,000
Income tax expense (134,000) (175,000) (41,000)
Current income tax (134,000) (175,000) (41,000)
Deferred Income tax 0 0 0
Profit (loss) from continued operations (14,141,000) 2,256,000 4,313,000
Total assets 31,371,000 34,131,000 30,449,000
Total liability 33,413,000 31,388,000 32,912,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 828,000 1,559,000 2,362,000
Changes in estimates of mine closures plans 6,312,000 3,585,000 (108,000)
Colquijirca [Member]      
Operating income      
Sales of goods 432,616,000 400,994,000 410,390,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 432,616,000 400,994,000 410,390,000
Operating costs      
Cost of sales, excluding depreciation and amortization (248,972,000) (267,997,000) (248,021,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (7,761,000) (16,671,000) (17,099,000)
Depreciation and amortization (87,216,000) (72,171,000) (68,830,000)
Mining royalties (2,670,000) (3,168,000) (1,626,000)
Total operating costs (346,619,000) (360,007,000) (335,576,000)
Gross profit (loss) 85,997,000 40,987,000 74,814,000
Operating expenses, net      
Administrative expenses (9,781,000) (8,744,000) (7,229,000)
Selling expenses (11,457,000) (9,649,000) (9,946,000)
Write-off of stripping activity asset     (6,763,000)
Exploration in non-operating areas (4,095,000) (4,008,000) (1,383,000)
Reversal (provision) of contingencies and others 1,063,000 (1,706,000) (356,000)
Impairment recovery (loss) of long-lived assets   0 0
Other, net (10,511,000) (7,777,000) (12,571,000)
Total operating expenses, net (34,781,000) (31,884,000) (38,248,000)
Operating profit (loss) 51,216,000 9,103,000 36,566,000
Other income (expense),net      
Finance income 2,866,000 879,000 388,000
Foreign currency exchange difference 381,000 526,000 (2,346,000)
Share in the results of associates and joint ventures (158,000) (10,000) 36,000
Finance costs (7,397,000) (6,470,000) (7,126,000)
Profit (loss) before income tax 46,908,000 4,028,000 27,518,000
Income tax expense (15,453,000) (3,666,000) (16,956,000)
Current income tax (17,861,000) (6,125,000) (12,220,000)
Deferred Income tax 2,408,000 2,459,000 (4,736,000)
Profit (loss) from continued operations 31,455,000 362,000 10,562,000
Total assets 683,311,000 668,230,000 694,831,000
Total liability 284,819,000 290,998,000 327,519,000
Other segment information      
Investments in associates 1,628,000 2,486,000 2,497,000
Acquisition of long-lived assets 61,772,000 62,593,000 37,649,000
Changes in estimates of mine closures plans 3,061,000 (11,322,000) (1,410,000)
La Zanja [Member]      
Operating income      
Sales of goods 16,472,000 52,260,000 39,380,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 16,472,000 52,260,000 39,380,000
Operating costs      
Cost of sales, excluding depreciation and amortization (29,008,000) (49,903,000) (46,531,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (537,000) (3,212,000) (574,000)
Depreciation and amortization (3,855,000) (7,459,000) (5,449,000)
Mining royalties (181,000) (506,000) (403,000)
Total operating costs (33,581,000) (61,080,000) (52,957,000)
Gross profit (loss) (17,109,000) (8,820,000) (13,577,000)
Operating expenses, net      
Administrative expenses (2,413,000) (3,061,000) (2,932,000)
Selling expenses (61,000) (179,000) (124,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas (3,958,000) (5,243,000) (5,742,000)
Reversal (provision) of contingencies and others 2,085,000 (353,000) (1,029,000)
Impairment recovery (loss) of long-lived assets   0 4,964,000
Other, net 7,246,000 (7,374,000) (44,000)
Total operating expenses, net (2,899,000) (16,210,000) (4,907,000)
Operating profit (loss) (14,210,000) (25,030,000) (18,484,000)
Other income (expense),net      
Finance income 838,000 614,000 196,000
Foreign currency exchange difference 92,000 336,000 (296,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (2,996,000) (1,318,000) (1,361,000)
Profit (loss) before income tax (16,276,000) (25,398,000) (19,945,000)
Income tax expense 579,000 (16,132,000) 4,212,000
Current income tax 579,000 (187,000) 0
Deferred Income tax 0 (15,945,000) 4,212,000
Profit (loss) from continued operations (15,697,000) (41,530,000) (15,733,000)
Total assets 44,341,000 79,038,000 121,681,000
Total liability 61,656,000 80,655,000 81,770,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 2,827,000 1,719,000 999,000
Changes in estimates of mine closures plans (922,000) (8,705,000) 175,000
Tambomayo [Member]      
Operating income      
Sales of goods 108,063,000 151,789,000 181,021,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 108,063,000 151,789,000 181,021,000
Operating costs      
Cost of sales, excluding depreciation and amortization (70,260,000) (76,214,000) (82,531,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (3,442,000) (9,980,000) (10,076,000)
Depreciation and amortization (49,863,000) (59,125,000) (63,638,000)
Mining royalties (1,047,000) (1,322,000) (1,712,000)
Total operating costs (124,612,000) (146,641,000) (157,957,000)
Gross profit (loss) (16,549,000) 5,148,000 23,064,000
Operating expenses, net      
Administrative expenses (11,183,000) (14,076,000) (15,382,000)
Selling expenses (2,758,000) (5,126,000) (5,485,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others (1,184,000) (228,000) 25,000
Impairment recovery (loss) of long-lived assets   0 0
Other, net 99,000 (815,000) (4,797,000)
Total operating expenses, net (15,026,000) (20,245,000) (25,639,000)
Operating profit (loss) (31,575,000) (15,097,000) (2,575,000)
Other income (expense),net      
Finance income 8,000 4,000 0
Foreign currency exchange difference 143,000 (11,000) (641,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (805,000) (302,000) (270,000)
Profit (loss) before income tax (32,229,000) (15,406,000) (3,486,000)
Income tax expense 0 (527,000) (132,000)
Current income tax 0 (527,000) (132,000)
Deferred Income tax 0 0 0
Profit (loss) from continued operations (32,229,000) (15,933,000) (3,618,000)
Total assets 143,451,000 197,550,000 264,521,000
Total liability 30,915,000 29,654,000 36,551,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 333,000 3,175,000 3,935,000
Changes in estimates of mine closures plans 53,000 (856,000) (308,000)
Operating Segments [Member]      
Operating income      
Sales of goods 5,107,737,000 4,986,536,000 5,317,751,000
Sale of services 63,073,000 70,061,000 83,161,000
Royalty income   1,381,000 15,928,000
Total operating income 5,170,810,000 5,057,978,000 5,416,840,000
Operating costs      
Cost of sales, excluding depreciation and amortization (2,714,235,000) (3,016,839,000) (2,867,931,000)
Unabsorbed cost due to production stoppage (22,622,000) (26,889,000) (26,376,000)
Cost of services 36,464,000 (24,861,000) 24,721,000
Exploration in operating units (69,841,000) (89,763,000) (62,603,000)
Depreciation and amortization (626,242,000) (220,342,000) (231,520,000)
Mining royalties (19,526,000) (19,234,000) (13,503,000)
Total operating costs (3,488,930,000) (3,397,928,000) (3,226,654,000)
Gross profit (loss) 1,681,880,000 1,660,050,000 2,190,186,000
Operating expenses, net      
Administrative expenses (73,652,000) (76,901,000) (77,847,000)
Selling expenses (178,459,000) (178,875,000) (132,473,000)
Write-off of stripping activity asset     (6,763,000)
Exploration in non-operating areas (13,506,000) (14,285,000) (11,301,000)
Reversal (provision) of contingencies and others 6,926,000 (3,477,000) (2,430,000)
Impairment recovery (loss) of long-lived assets   19,874,000 (14,910,000)
Other, net (64,900,000) (39,004,000) (34,985,000)
Total operating expenses, net (323,591,000) (292,668,000) (280,709,000)
Operating profit (loss) 1,358,289,000 1,367,382,000 1,909,477,000
Other income (expense),net      
Finance income 51,828,000 28,788,000 8,339,000
Foreign currency exchange difference 40,622,000 27,802,000 8,994,000
Share in the results of associates and joint ventures 175,692,000 176,577,000 (154,835,000)
Finance costs (191,256,000) (61,926,000) (94,012,000)
Profit (loss) before income tax 1,435,175,000 1,538,623,000 1,677,963,000
Income tax expense (592,897,000) (501,504,000) (743,960,000)
Current income tax (653,477,000) (462,118,000) (752,549,000)
Deferred Income tax 60,580,000 (39,386,000) 8,589,000
Profit (loss) from continued operations 842,278,000 1,037,119,000 934,003,000
Total assets 13,843,508,000 13,836,447,000 14,063,903,000
Total liability 2,786,627,000 2,824,648,000 4,454,433,000
Other segment information      
Investments in associates 2,468,020,000 2,437,386,000 2,280,588,000
Acquisition of long-lived assets 250,087,000 153,369,000 90,309,000
Changes in estimates of mine closures plans 11,879,000 (21,869,000) (3,272,000)
Elimination of intersegment amounts [member]      
Operating income      
Sales of goods (4,296,776,000) (4,185,337,000) (4,454,281,000)
Sale of services (50,189,000) (47,839,000) (62,109,000)
Royalty income   0 0
Total operating income (4,346,965,000) (4,233,176,000) (4,516,390,000)
Operating costs      
Cost of sales, excluding depreciation and amortization 2,256,881,000 2,554,897,000 2,338,200,000
Unabsorbed cost due to production stoppage 2,729,000 3,831,000 867,000
Cost of services (30,221,000) 21,698,000 (23,452,000)
Exploration in operating units 20,612,000 8,967,000 6,191,000
Depreciation and amortization 445,203,000 43,561,000 44,309,000
Mining royalties 687,000 1,501,000 529,000
Total operating costs 2,756,333,000 2,634,455,000 2,413,548,000
Gross profit (loss) (1,590,632,000) (1,598,721,000) (2,102,842,000)
Operating expenses, net      
Administrative expenses 4,469,000 9,173,000 10,262,000
Selling expenses 159,067,000 158,653,000 111,646,000
Write-off of stripping activity asset     0
Exploration in non-operating areas 54,000 33,000 31,000
Reversal (provision) of contingencies and others 1,000 542,000 (257,000)
Impairment recovery (loss) of long-lived assets   0 0
Other, net 89,873,000 23,919,000 5,725,000
Total operating expenses, net 253,464,000 192,320,000 127,407,000
Operating profit (loss) (1,337,168,000) (1,406,401,000) (1,975,435,000)
Other income (expense),net      
Finance income (42,771,000) (14,345,000) (2,387,000)
Foreign currency exchange difference (21,247,000) (931,000) (27,680,000)
Share in the results of associates and joint ventures (23,467,000) (307,000) 395,285,000
Finance costs 72,002,000 7,790,000 33,383,000
Profit (loss) before income tax (1,352,651,000) (1,414,194,000) (1,576,834,000)
Income tax expense 549,903,000 501,463,000 767,631,000
Current income tax 584,171,000 446,485,000 732,174,000
Deferred Income tax (34,268,000) 54,978,000 35,457,000
Profit (loss) from continued operations (802,748,000) (912,731,000) (809,203,000)
Total assets (9,309,709,000) (9,333,220,000) (9,502,092,000)
Total liability (1,422,039,000) (1,484,362,000) (2,431,153,000)
Other segment information      
Investments in associates (940,897,000) (916,409,000) (858,293,000)
Acquisition of long-lived assets (11,418,000) (1,396,000) 0
Changes in estimates of mine closures plans 0 0 0
Sociedad Minera Cerro Verde S.A.A.      
Operating income      
Sales of goods 4,143,228,000 3,975,295,000 4,199,448,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 4,143,228,000 3,975,295,000 4,199,448,000
Operating costs      
Cost of sales, excluding depreciation and amortization (2,142,799,000) (2,367,767,000) (2,155,088,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (9,177,000) 0 0
Depreciation and amortization (409,847,000) 0 0
Mining royalties 0 0 (5,889,000)
Total operating costs (2,561,823,000) (2,367,767,000) (2,155,088,000)
Gross profit (loss) 1,581,405,000 1,607,528,000 2,044,360,000
Operating expenses, net      
Administrative expenses 0 0 0
Selling expenses (158,244,000) (157,373,000) (109,886,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 0 0 0
Impairment recovery (loss) of long-lived assets   0 0
Impairment loss of long-lived assets (3,546,000) 0 0
Other, net (82,042,000) (23,933,000) (8,110,000)
Total operating expenses, net (240,286,000) (181,306,000) (117,996,000)
Operating profit (loss) 1,341,119,000 1,426,222,000 1,926,364,000
Other income (expense),net      
Finance income 36,285,000 12,314,000 1,713,000
Foreign currency exchange difference 20,476,000 2,820,000 29,493,000
Share in the results of associates and joint ventures 0 0 0
Finance costs (67,118,000) (31,500,000) (30,393,000)
Profit (loss) before income tax 1,330,762,000 1,433,900,000 1,927,177,000
Income tax expense (551,798,000) (508,547,000) (735,703,000)
Current income tax (582,438,000) (445,078,000) (704,454,000)
Deferred Income tax 30,640,000 (63,649,000) (31,249,000)
Profit (loss) from continued operations 778,964,000 925,353,000 1,191,474,000
Profit for the year 778,964,000,000 925,353,000,000 1,191,474,000,000
Total assets 7,930,910,000 7,993,863,000 8,124,564,000
Total liability 1,250,536,000 1,342,436,000 1,997,558,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 0 0 0
Changes in estimates of mine closures plans 0 0 0
Compania Minera Coimolache S.A.      
Operating income      
Sales of goods 136,949,000 159,003,000 215,481,000
Sale of services 0 0 0
Royalty income   0 0
Total operating income 136,949,000 159,003,000 215,481,000
Operating costs      
Cost of sales, excluding depreciation and amortization (83,882,000) (114,513,000) (106,088,000)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (11,435,000) (8,967,000) (6,191,000)
Depreciation and amortization (34,745,000) (42,950,000) (43,698,000)
Mining royalties (686,000) (1,500,000) (529,000)
Total operating costs (130,748,000) (167,930,000) (156,506,000)
Gross profit (loss) 6,201,000 (8,927,000) 58,975,000
Operating expenses, net      
Administrative expenses (3,772,000) (4,139,000) (3,718,000)
Selling expenses (823,000) (1,018,000) (1,114,000)
Write-off of stripping activity asset     0
Exploration in non-operating areas 0 0 0
Reversal (provision) of contingencies and others 0 74,000 0
Impairment recovery (loss) of long-lived assets   0 0
Other, net 1,345,000 317,000 156,000
Total operating expenses, net (3,250,000) (4,766,000) (4,676,000)
Operating profit (loss) 2,951,000 (13,693,000) 54,299,000
Other income (expense),net      
Finance income 6,298,000 1,961,000 247,000
Foreign currency exchange difference 647,000 (51,000) (1,819,000)
Share in the results of associates and joint ventures 0 0 0
Finance costs (5,437,000) (2,158,000) (2,613,000)
Profit (loss) before income tax 4,459,000 (13,941,000) 50,114,000
Income tax expense (281,000) 5,573,000 (31,820,000)
Current income tax (2,756,000) (2,951,000) (27,702,000)
Deferred Income tax 2,475,000 8,524,000 (4,118,000)
Profit (loss) from continued operations 4,178,000 (8,368,000) 18,294,000
Profit for the year 2,673,000 (6,218,000) 20,377,000
Total assets 380,331,000 365,585,000 414,986,000
Total liability 128,886,000 117,388,000 150,751,000
Other segment information      
Investments in associates 0 0 0
Acquisition of long-lived assets 8,929,000 0 0
Changes in estimates of mine closures plans 1,404,000 0 0
Tinka resources Ltd      
Operating income      
Sales of goods   0 0
Sale of services   0 0
Royalty income   0 0
Total operating income   0 0
Operating costs      
Cost of sales, excluding depreciation and amortization   0 0
Unabsorbed cost due to production stoppage   0 0
Cost of services   0 0
Exploration in operating units   0 0
Depreciation and amortization   0 0
Mining royalties 0 0 0
Total operating costs   0 0
Gross profit (loss)   0 0
Operating expenses, net      
Administrative expenses (297,000) (4,383,000) (5,692,000)
Selling expenses   0 0
Write-off of stripping activity asset     0
Exploration in non-operating areas   0 0
Reversal (provision) of contingencies and others   0 0
Impairment recovery (loss) of long-lived assets   0 0
Other, net   0 0
Total operating expenses, net (297,000) (4,383,000) (5,692,000)
Operating profit (loss) (297,000) (4,383,000) (5,692,000)
Other income (expense),net      
Finance income 77,000 0 0
Foreign currency exchange difference 126,000 0 0
Share in the results of associates and joint ventures   0 0
Finance costs   0 0
Profit (loss) before income tax (94,000) (4,383,000) (5,692,000)
Income tax expense   0 0
Current income tax   0 0
Deferred Income tax   0 0
Profit (loss) from continued operations (94,000) (4,383,000) (5,692,000)
Profit for the year (6,832,000) (12,666,000) (5,692,000)
Total assets 76,379,000 63,461,000 59,128,000
Total liability $ 350,000 473,000 211,000
Other segment information      
Investments in associates   0 0
Acquisition of long-lived assets   0 0
Changes in estimates of mine closures plans   $ 0 $ 0