Sceptics point to the behaviour of copper prices in the latter part of last year.
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That secondary rock has become exhausted and the production of copper was falling, he said.
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Massive ore deposits of copper, lead, zinc, silver, gold and other metals formed in this way.
The adjusted reserves will be 103.6 billion pounds of copper and 17 million ounces of gold.
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And we knew very well that there were vast mountains of copper oxides out there.
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It now expects to make 3.8 billion pound of copper, down from 3.9 billion.
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The tole is embossed, hammered and formed, and then attached to stems fashioned of copper wire.
And, behold, they found clippers, gloves, a torch and 24kg (53lbs) of copper cable.
The price of copper, for instance, has gone down over fears that the economic recovery might stall.
For some time now, the market has known of large inventories of copper in bonded Chinese warehouses.
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MacMillan estimates world consumption of copper to rise 4% this year, the first uptick in three years.
In terms of copper, Barrick saw production slide to 112 million pounds, from 140 a year ago.
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Thus money managers have helped to drive the price of copper up over the last two weeks.
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While results confirmed an exceptional amount of copper, Barrick had to revise its cost estimates drastically higher.
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The Oyu Tolgoi deposits reportedly contain 79 billion pounds of copper and 45 million ounces of gold.
For example, the early 1980s deployment of SX-EW technology hugely increased the amount of copper available to us.
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Freeport may have lost 35 million pounds of copper and 60, 000 ounces of gold production during the strike.
There are rumours of huge unofficial stockpiles but the structure of copper prices suggests that these are exaggerated.
In 2003, for example, China's imports of copper jumped by 15% and those of nickel more than doubled.
Last month some rather more organised criminals lifted 2km of copper wire and cable between Hanover and Hamburg.
It releases nearly 500 tons each of copper and nickel oxides and 2 million tons of sulfur dioxide into the air.
The challenge is to make the best use of copper for the benefit of present and future generations.
Mining is big business in Peru, which is a major world producer of copper, silver, gold and other minerals.
Think about that as your hybrid runs stealthily on battery power, brought to motion by the conductivity of copper.
The force said recent price rises of copper and aluminium were thought to be behind the spate of incidents.
BBC: NEWS | UK | England | Southern Counties | Price rises 'behind metal thefts'
Meanwhile, a large drum of copper cable was stolen after a lorry driver was ambushed in Kent on Thursday.
BBC: NEWS | UK | England | Southern Counties | Price rises 'behind metal thefts'
Bracemac-McLeod is expected to produce roughly 100, 000 tons of zinc and 11, 000 tons of copper annually once production begins.
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But there was just as much anger over the destruction of the hills, an inevitable consequence of copper mining.
The deal includes 4.2 square miles of patented claims and historic resource estimate of 4 billion pounds of copper.
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