about 1 .5 lb of copper for every 1000 lbs rock
DESCRIPTION
About 1 .5 lb of copper for every 1000 lbs rock . tailings. ore. The concentrating and smelting process adds a whole other layer of environmental problems. . But first….. The earth that is moved to get the ore. tailings. Mining changes the landscape. 1985. Butte Montana in 1942. - PowerPoint PPT PresentationTRANSCRIPT
About 1 .5 lb of copper for every 1000 lbs rock
ore
tailings
The concentrating and smelting process adds a whole other layer of environmental problems.
tailings
But first…..
The earth that is moved to get the ore
Mining changes the landscape
Butte Montana in 19421985
Underground mining was the first type of industrialized mining in Butte
June 8th, 1917 underground fire took 168 lives, the nation's worst hard rock mining disaster.
Then came open pit mining….And the pits
NASA image
Angela Brown
Arsenic and other heavy metals, including copper, zinc, cadmium and lead.
Tailings pond look like mountain lakes from afar but have same heavy metals
The concentrating and smelting process adds a whole other layer of environmental problems.
Silver Bow Creek was used as a conduit for mining, smelting, industrial and municipal wastes for more than a hundred years. Vast mine tailings deposits are found along the creek. These deposits contain elevated levels of metals and have been dispersed over the entire flood plain.
Cool Water Hula