The geology in Texas allows for a mining procedure called "in situ" recovery, cheaper than traditional seam or open-pit mining.
At Surmont, instead of open-pit mining, the bitumen is melted out of the ground by injecting steam.
Yes, open pit bitumen mining blights the landscape, the process releases too much carbon dioxide, and tailing ponds occasionally kill ducks.
The big prize here is a 20% stake in the Fort Hills oil sands project, an open-pit mining operation targeting 3.4 billion barrels of bitumen.
The delays were caused by new Argentine import restrictions, which the company said has hindered its ability to purchase necessary spare parts in-country to keep all open-pit mining equipment in continuous operation.
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The accident has had no effect on the open mining pit at Grasberg, he adds.
De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.
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Newmont attributed the lower production to the processing of lower grade ore from stockpiles as it prepared for a new phase of mining at the vast open pit in the mountains of Sumbawa.
Newmont has attributed the lower production to the processing of lower grade ore from stockpiles as it prepares for a new phase of mining at the vast open pit in the mountains of Sumbawa.
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Still, the increase at Manantial Espejo was less than anticipated due to delays in commissioning an additional mining fleet that was purchased to accelerate open pit production, Pan American Silver said.
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Sales decreased from 2.32 million ounces in 2007 to 1.31 million ounces in 2008 due to mining in the lower grade section of the Grasberg open pit.
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