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Gains (losses) from operating activities in the statement of income, included according to their nature (Details 8) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Depreciation and amortization expense |  |  |
Depreciation of Right-of-use Assets | $ 8,431 | $ 7,951 |
Properties plant and equipment | (9,563) | (49) |
Goodwill | (140) | (140) |
Operation leases | 1,133 | 1,535 | $ 0
Expenses related to Variable Parts Leases (IFRS 16) | (1,133,000) | (1,096,000) |
Other expenses by nature [Member] |  |  |
Statement [Line Items] |  |  |
Raw materials and consumables | (287,877) | (271,912) | (260,869)
Classes of Employee Benefit Expenses |  |  |
Personnel expenses | (234,108) | (238,748) | (267,451)
Depreciation and amortization expense |  |  |
Depreciation expense | (182,452) | (188,293) | (212,700)
Depreciation of Right-of-use Assets | (8,431) | (7,951) | 0
Impairment of Value | (1,658) | (913) | (1,390)
Properties plant and equipment | (9,563) | (49) | (3,254)
Goodwill | (140) | (140) | 0
Amortization expense | (13,029) | (5,107) | (8,127)
Operation leases | (60,572) | (51,361) | (41,801)
Legal expenses | (69,965) | (9,277) | (15,139)
Investment plan expenses | (15,150) | (20,060) | (19,415)
Exploration expenses | (5,262) | (5,537) | (5,864)
Provision for site closure | (911) | (911) | (2,045)
Provision for materials, spare parts and supplies | 640 | (7,500) | 1,721
Contractors | (147,080) | (125,667) | (126,653)
Mining concessions | (6,645) | (7,856) | (8,168)
Operation transport | (68,730) | (56,376) | (64,352)
Freight and product transport costs | (52,156) | (46,264) | (51,387)
Purchase of products from third parties | (224,115) | (210,583) | (182,695)
CORFO rights | (74,418) | (143,861) | (182,954)
Export costs | (71,718) | (75,908) | (107,418)
Expenses related to Variable Parts Leases (IFRS 16) | (1,133) | (1,037) | 0
Insurance | (21,135) | (19,521) | (13,681)
Restructuring of joint ventures |  |  | 6,000
Consultant and advisor services | (13,880) | (13,862) | (12,848)
Variation in inventory | 97,467 | 52,557 | 20,597
Variation in provision on product inventory | 7,244 | 17,107 | (8,997)
Other expenses, by nature | (76,173) | (87,748) | (71,774)
Total | $ (1,540,950) | $ (1,526,778) | $ (1,640,664)

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- Definition The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2020-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2020-en-r&anchor=para_24_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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