zinc, iron, grade, tin, gold, rich, lead, type, these, its sulphide, copper, smelting, ferrous, tungsten, nickel, iron, mineral, oxide, metal, silver, phosphate, bearing, precious, massive, complex, various, natural, local, other, different complex manganese, oxidized, mineral, carbonate, valuable, primary, various, natural, different uranium, metallic, imported, containing, important uranium, refractory disseminated radioactive

mined, are, found, which, such, may, used, have contain, occur containing

polymetallic sulfideantimony sulphide, sulfide, oxidemagmatic hydrothermalarsenical coppernonmetallic mineralzinc oxide, sulphide, sulfide, smelting, phosphate, silicate, carbonate, metal, mining, mine, copperferrous sulphide, sulfide, iron, oxide, metal, carbonatevanadium oxidealuminum silicate, oxide, smelting, phosphate, carbonate, metal, coppernickel sulphide, sulfide, oxide, chromium, titanium, zinc, carbonate, silver, metal, mining, copper, minedisseminated pyritemolybdenum sulfide, oxide, mine, metalbauxite mining, minestratiform copper, leadchromium oxide, cobalt, manganese, nickel, copper, metal, irontitanium oxide, metalthorium oxidecobalt chrome, chromium, oxide, carbonate, nickel, copper, metalarsenic sulphide, sulfide, oxidemetalliferous miningcopper smelting, chromite, sulphide, sulfide, oxide, mining, carbonate, mine, nickel, manganese, mined, zinc, aluminum, metalmanganese sulphide, oxide, molybdenum, sulfide, silicate, carbonate, zinc, phosphate, mining, mine, iron, metalnonferrous metalmassive sulphide, sulfide, pyritesedimentary pyrite, carbonate, mineral, ironiron smelting, oxide, pyrite, sulfide, sulphide, silicate, manganese, phosphate, mininguranium oxide, mining, mine, metal, mineral, processingsilicate mineraltin oxide, smelting, mining, minemetallic antimony, mineral, mercury, zinc, nickel, arsenic, cobalt, copper, silver, chromium, oxide, platinum, titanium, uranium, iron, aluminum, tin, fe, gold, surface, miningtungsten oxide, metal, mineradioactive cobalt, phosphorus, chromium, uranium, phosphate, mineralchrome oxidesulfide mineralbanded ironsulphide minerallake superiormetal oxide, smelting, sulfide, sulphide, mining, surfacesmelting iron, copperprecious metalmineral magnetite, flotation, processing, raw, mining, zincsilver sulphide, sulfide, mining, oxide, mined, lake, metallic, mine, carbonatehematite ironhydrothermal mineral, veinmercury sulfide, oxidegold mining, mine, mined, metallicgrade bauxite, uranium, manganeseimported raw, crudecarbonate sedimentary, mineralbog iron, lake, nearplatinum oxide, metal, surface, minefe oxiderefractory metal, oxideprimary nonferrous, magmatic, sedimentaryoxidized copper, iron, metal, silver, surfacenear sudburyphosphate mining, phosphorus, minerallead sulphide, smelting, sulfide, oxide, carbonate, silicatenatural uraniummined copper, gold, nearcontaining vanadium, arsenic, antimony, molybdenum, chromium, ferrous, pyrite, cobalt, radioactive, titanium, manganese, phosphorus, zinc, nickel, aluminum, mercury, uranium, phosphatepoorer qualityrichest vein, mineral, gold, copper, silver, miningvaluable mineralsurface miningpoor quality, poorerrich vein, richer, hydrothermal, mineral, silicate, sedimentaryphosphorus oxidemixed oxide, carbonatenative oxide, copperbearing silicate, sedimentarylump formedmay occur, require, consist, lead, containoxide mineral, surfacefine tungsten, platinum, goldmining uraniumcontain arsenic, chromiumusually consist, associatedpyrite surfaceavailable phosphorusmagnetic bearing, oxidesuperior qualitycontained arsenicgenerally consistvein superiorcomplex silicatedomestic crude