Mount Isa Mines tetrahedrite as ore minerals along with common accessories pyrite, pyrrhotite, quartz, carbonates and graphite. Minor arsenopyrite, marcasite, chalcopyrite, valleriite, proustite, polybasite and argentite also occur. Original surface oxidized ore contained cerussite, anglesite and pyromorphite. Silver and zinc were removed from the surface oxidized zone and were deposited as supergene ore at a depth above the primary ore. Copper occurs in brecciated "silica-dolomite" rock. Primary minerals are chalcopyrite, pyrrhotite and arsenopyrite. minor amounts of cobaltite, marcasite, valleriite, chalcostibite, galena and others are reported. Smelter operations release sulfur dioxide emissions very close to the city of Mount Isa. The Mount Isa Mines
Ore Mountains 2007 the Ore Mountains and West Saxony is the most important Saxon holiday destination after the cities, and tourism is an important economic factor in the region. Since 2004 the Ore Mountain Tourist Association ("Tourismusverband Erzgebirge") has offered the Ore Mountain Card ("ErzgebirgsCard") with which over 100 museums, castles, heritage railways and other sights may be visited free of charge. The culture of the Ore Mountains was shaped mainly by mining that goes back to the Middle Ages. The old saying, coined here, that "everything comes from the mine" ("Alles kommt vom Bergwerk her!") refers to many areas of life