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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Macraes Mine ： ウィキペディア英語版 Macraes Mine Macraes Mine in East Otago is New Zealand's largest gold mine, owned by OceanaGold Corporation, which consists of a large scale opencast mine (opened in 1990), and a newer underground mine, opened in 2008. 〔(Macraes Mine ) at Oceana Gold〕 It is situated close to the settlement of Macraes Flat. Tours of the mine are available. 〔(Mine tours )〕 Gold production averaged 193,000 ounces/year for 2008 through 2010. Ore grades have been declining, to 1.26 grams/tonne in 2010, but recoveries have improved slightly to 81% of the gold contained in the ore, in 2010. From 1990 through 2014, gold production has totaled about 4 million ounces. 〔( Oceana Gold Business Review, June 2011. )〕 The company claims a gold reserve of 1.53 MM troy oz Au plus a larger subeconomic gold resource; and expects the mine to operate at least through 2019. 〔 The gold bearing rocks were formed by the orogenic processes that created the Otago Schist belt. ==References== 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「Macraes Mine」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.