for example, 99 tons of waste are generated per ton of copper, with even higher ratios in gold mining – because only 5.3 g of gold is extracted per ton of ore, a ton of gold produces 200,000 tons of tailings. as time goes on and richer deposits are exhausted – and technology improves to permit – this number is going down to .5 g and less.
the sullivan mine is a now-closed conventional–mechanized underground mine located in kimberley, british columbia, canada.the ore body is a complex, sediment-hosted, sedimentary exhalative deposit consisting primarily of zinc, lead, and iron sulphides.lead, zinc, silver and tin were the economic metals produced. the deposit lies within the lower part of the purcell supergroup and .
the transylvanian mining railway was a local interest narrow-gauge 760mm gauge railway which was the first mining railway in transylvania. this railway was built to ease the transportation of the iron ore mined from the iron ore mines from ghelari to the blast furnace in govăjdia and the ironworks from hunedoara.
the fort knox gold mine is an open pit gold mine in the fairbanks mining district of alaska.it is owned and operated by toronto based kinross gold.originally staked in 1913, the property sat idle until being restaked in 1980, and purchased by amax gold, who brought the mine into production. ownership transferred to kinross gold following its 1998 merger with amax.
gold point, nevada is a well preserved ghost town in esmeralda county, nevada. the community was named after the local gold-mining industry. gold point is the southern terminus of nevada state route 774 . the area that would become gold point was first settled by ranchers and a few miners during the 1880s. the small camp of lime point was .
gold extraction is also highly energy intensive industry 25 kwh of electricity per one gram of gold production to extract ore from deep mines and to grind the large quantity of ore for further chemical extraction. in present day world, underground mining is least preferred employment by workmen as the occupational environment is not suitable .