Open-pit mining - Wikipedia, the free encyclopediaOpen-pit, open-cast or open cut mining is a surface mining technique of extracting rock or . Ore which has been processed is known as tailings, and is generally a slurry. . material); Granite · Gritstone · Gypsum · Line · Marble · Metal ores, such as copper, iron, gold, silver and molybdenum · Uranium · Phosphate.open pit mining of iron ore,open pit mining of iron ore,True giants of mining: World's top 10 iron ore mines | MININGSep 17, 2015 . China is also the biggest iron ore importer and, as of April 2015, . biggest iron ore production center, which consists of three open-pit mines,.open pit mining of iron ore,Top 10 deep open-pit mines - Mining TechnologySep 27, 2013 . The deepest open pit mines are scattered geographically across the . The mine produced more than 100 million tonnes of iron ore in 2011.
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