It is leasing 47 square miles from the federal government for the life of the mine, an expected 11 years.
In return, it gets a portion of the silver for the life of the mine at a fixed cost.
Under present copper price assumptions, Barrick reduced its production expectations and hence profitability over the life of the mine.
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At the moment the mine has an 11 year reserve-based mine life with maximum diamond production peaking at 2.1 million carats per year, and averaging 1.7 million carats per year over the life of the mine.
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In Peru the Hallgarten analysts are fans of Northern Peru Copper, whose test bores show a sizable reserve of 7.3 billion pounds of copper and a mine life of 20 years.
In September, Agnico-Eagle approved the development and construction of the La India mine project in Sonora, Mexico, with commercial production expected in the second half of 2014, with a mine life of eight years forecast.
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The revised cost estimates are due to higher expected future costs, the new life-of-mine plan, and the doubling of royalties by the Zambian government.
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The reserve life of a typical gold mine is no more than 10 years so the reinvestment rate for exploration and incremental production is capital intensive.
Historically the region has a rich zinc presence and while the initial mine life of Bracemac-McLeod is pegged at four years, there is optimism from Donner that it will be expanded as drilling continues to reveal strong grades.
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Bruce Bragagnolo, chief executive officer of the Vancouver-based gold mining firm, said the goal is a 10-year mine life producing 100, 000 ounces of gold per year.
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For some people sudden realizations in life come in one breath of their own, but mine had come in a breath not taken by another.
Detour Lake is expected to produce between 350, 000 to 400, 000 ounces of gold in 2013 and will continue to produce an annual average of 657, 000 ounces of gold over its 21-year mine life.
Cameras lowered into previous holes drilled into the mountain turned up no signs of the miners, and tests showed that oxygen levels in parts of the mine were too low to sustain human life.
The company's new boss, Mzi Khumalo, visited the mine earlier this year, bringing the promise of a better life for miners.
Churchill might tell me something about the art of statecraft, or Fry about the pressures of fame and the joy of words, but someone closer to home, with a life more like mine and challenges more like mine, will tell me far more about a life with mental health difficulty and how best to live it.
If your life is less boring than mine, it can sometimes be less than clear what state you are a resident of.
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Hungry, motivated graduates full of life skills - most notably initiative, communication and decision-making skills - are the gold we employers now mine for.
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