

	Year ended December 31, 2018
	Information system projects		Mining assets		Exploration and evaluation costs	Customer relationships and other contractual rights		Trademarks		Goodwill	Total
Values at the beginning of the year
Cost	249,379		216,196		10,333	604,931		73,935		662,307	1,817,081
Accumulated depreciation	(188,470	)	(121,859	)	—	(340,238	)	(73,935	)	—	(724,502	)

Net book value at January 1, 2018	60,909		94,337		10,333	264,693		—		662,307	1,092,579

Opening net book value	60,909		94,337		10,333	264,693		—		662,307	1,092,579
Effect of initial inflation adjustment (Note 4 (cc))	4,966		—		—	—		—		—	4,966
Translation differences	(6,674	)	—		—	—		—		—	(6,674	)
Additions	27,594		10,243		2,641	—		—		—	40,478
Disposals / Consumptions	(87	)	—		—	—		—		—	(87	)
Transfers	480		(10,237	)	10,235	—		—		—	478
Depreciation charge	(15,427	)	(18,055	)	—	(85,734	)	—		—	(119,216	)

Closing net book value	71,761		76,288		23,209	178,959		—		662,307	1,012,524

Values at the end of the year
Cost	320,600		216,203		23,209	604,931		73,935		662,307	1,901,185
Accumulated depreciation	(248,839	)	(139,915	)	—	(425,972	)	(73,935	)	—	(888,661	)

Net book value at December 31, 2018	71,761		76,288		23,209	178,959		—		662,307	1,012,524



	Year ended December 31, 2017
	Information system projects		Mining assets		Exploration and evaluation costs		Customer relationships and other contractual rights		Trademarks		Goodwill	Total
Values at the beginning of the year
Cost	215,662		202,931		5,689		298,475		73,665		662,307	1,458,729
Accumulated depreciation	(164,203	)	(106,424	)	—		(272,923	)	(72,622	)	—	(616,172	)

Net book value at January 1, 2017	51,459		96,507		5,689		25,552		1,043		662,307	842,557

Opening net book value	51,459		96,507		5,689		25,552		1,043		662,307	842,557
Translation differences	(1,730	)	—		—		—		—		—	(1,730	)
Acquisition of business (Note 3)	2,731		—		—		314,177		—		—	316,908
Additions	35,867		8,076		9,829		—		—		—	53,772
Disposals / Consumptions	(32	)	—		—		—		—		—	(32	)
Transfers	(512	)	5,185		(5,185	)	(4,845	)	—		—	(5,357	)
Depreciation charge	(26,874	)	(15,431	)	—		(70,191	)	(1,043	)	—	(113,539	)

Closing net book value	60,909		94,337		10,333		264,693		—		662,307	1,092,579

Values at the end of the year
Cost	249,379		216,196		10,333		604,931		73,935		662,307	1,817,081
Accumulated depreciation	(188,470	)	(121,859	)	—		(340,238	)	(73,935	)	—	(724,502	)

Net book value at December 31, 2017	60,909		94,337		10,333		264,693		—		662,307	1,092,579

The Company has not registered any impairment charges in connection with Goodwill.