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Birchtree Mine : ウィキペディア英語版 | Birchtree Mine
Birchtree Mine is an underground nickel mine, owned and operated by Vale Inco in the city of Thompson, Manitoba, Canada. It lies in the nickel containing Thompson Belt, a geologic feature associated with the Circum-Superior Belt large igneous province throughout the Superior craton. ==History== Birchtree mine originally opened in 1965 until 1978 when it was put in "standby" until 1988.〔 The mine reopened again in 1989.
In 2000 Inco authorized US$48 million to deepen the mine to , expanding production to 3,800 tons per day.〔 The Deepening Project allowed Inco to access ore between the 3950 level and 2300 level. In 2002〔(【引用サイトリンク】url=http://www.gov.mb.ca/iedm/mrd/busdev/exp-dev/highlights01.html )〕 Birchtree Mine started producing ore from between 2750 level and 2300 level. In 2003 the first ore was extracted between 3950 level and 3450 level.
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「Birchtree Mine」の詳細全文を読む
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