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The Cerro Vanguardia Mine is a gold and silver mine located 150 km north west of Puerto San Julián, in the Santa Cruz province of Argentina. It is majority-owned and operated by AngloGold Ashanti, which holds a 92.5% interest in the mine (). The remaining 7.5% are owned by ''Formicruz'' (''Fomento Minero de Santa Cruz Sociedad del Estado''), a company owned by the province of Santa Cruz.〔(AngloGold Ashanti: Country report Argentina ) accessed: 14 July 2010〕 In 2008, the mine contributed 3% to the company's annual production and employs in excess of 1,000 people. The Cerro Vanguardia mine consists of a number of small open pits.〔 ==History== The gold deposit at Cerro Vanguardia was first discovered in 1976 and, in 1987, mining group Pérez Companc S.A. formed a mineral exploration joint venture with ''AMSA'', Anglo American’s South American holding company.〔(Cerro Vanguardia Gold and Silver Mine, Argentina ) mining-technology.com, accessed: 14 July 2010〕 AngloGold, predecessor of AngloGold Ashanti, acquired a 46.23% interest in the project in 1998–99, and an additional 46.25%, the Pérez Companc stake, in July 2002, doubling its interest to 92.5%. AngloGold Ashanti owns the right to exploit the deposit for 40 years based on the ''Usufruct Agreement'', signed in December 1996. Cerro Vanguardia, which was constructed at a total cost of US$ 270 million, was commissioned in late 1998.〔(AngloGold annual Report 2003 ) AngloGold Ashanti website, accessed: 14 July 2010〕 The mine suffered a difficult year in 2008, when production fell by 25% while the cash cost more than doubled.〔 The company did however manage to improve production in 2009 and lower the cash cost again. In 2009, the mine was also fatality-free for the seventh consecutive year.〔 Future mining plans at Cerro Vanguardia include an underground operation, from 2010, and a heap leach operation.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cerro Vanguardia Mine」の詳細全文を読む スポンサード リンク
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