energy and environmental profile of the u.s. mining industry 6 lead and zinc lead and zinc ores are usually found together with gold and silver. a lead-zinc ore may also contain lead sulfide, zinc sulfide, iron sulfide, iron carbonate, and quartz. when zinc and lead sulfides are present in profitable amounts they are regarded as ore minerals.
san francisco — violent gunmen still menace pick-and-shovel miners in eastern congo, a new report finds, despite years of efforts to loosen their grip by local reformers, western activists and
drift mining is used to access a range of minerals like gold, coal, quartz, and zinc. it poses high economical means of recovery than other more invasive types of underground mining that entail digging up through rock.
forget lithium -- it's rare earth minerals that are in short supply for evs. by jim motavalli updated on: june 19, 2010 / 9:43 am / moneywatch
franklin, n.j. -- burglars climbed a barbed wire fence, rappelled into a museum and smashed display cabinets to steal $30,000 in emeralds, diamonds and other precious stones, leaving a trail of
* list of countries by zinc production . mining and concenterating : zinc ores are obtained by many mining techniques, ranging from open-pit mining to the normal underground methods. the most common underground method of ore extraction is cut-and-fill stopping, in which tunnels are dug to moderate depths, branching away from the mine holes.
zinc mining is the process by which mineral forms of the metal zinc are extracted from the earth through mining. a zinc mine is a mine that produces zinc metal. some mines produce primarily zinc, but some mines produce zinc as a side-product of some metal that has a higher concentration in the ore.
in the 18th century, it was discovered that sphalerite, or zinc sulfide, could be smelted into brass, resulting in the first patented techniques. since then, the zinc industry has progressed to the current zinc mining process and production methods used today. the basics of zinc mining and processing