Related by context. Frequent words. (Click for all words.) 59 Silver Lead Zinc 57 Zinc Lead 57 Au Cu 56 Ag Au 56 By Sarah Trotto 56 skarns 55 copper molybdenum 54 Sierra Madre Occidental 53 Au Ag 53 polymetallic 53 oxide copper 53 By ALLEN GEMAEHLICH 53 siliceous 52 skarn mineralization 52 Cu Au 52 sulfide mineralization 51 By MIKE WIGGINS 51 By AMY HAMILTON 51 gold platinum palladium 51 g Ag 50 Lead Zinc 50 By GARY HARMON 49 copper oxides 49 supergene 49 Niobium 49 sulphide zones 48 copper 48 copper Cu 48 cobalt nickel 48 copper ores 48 Magnetite 47 nickel sulphide 47 El Abra 47 Chromite 47 tantalite 47 Corani 46 Gwyneth Paltrow Joaquin 46 copper zinc 46 Sparsely populated 46 molybdenum 46 Sierra Madre Mountains 46 copper oxide 46 copper cobalt 45 Wildfire Burns 45 manganese oxide 45 sulphide nickel 45 SX EW 45 feldspar 45 nickel copper 45 Pulacayo 44 heap leach operation 44 Earthquake shakes 44 cathode copper 44 zinc copper 44 Rhenium 44 Maricunga 44 Earthquake rattles 44 Inata 44 sulfide 44 By Cathy Spaulding 43 WO3 43 Ken Salazar D Colo 43 copper nickel 43 chromite 43 nickel cobalt 43 Orrin G. 43 Valles Marineris 43 tellurium 42 Cerro Verde 42 metals PGM 42 Pirquitas 42 platinum palladium 42 Mike Crapo R 42 Molybdenum 42 Hyoung Chang 42 Penasquito 42 niobium 42 UG2 42 sulphide 42 Donna Hales 41 #/oz Au [002] 41 #.#/lb Cu 41 heap leach 41 Sens. Lisa Murkowski 41 Will Dual Mode 41 % Cr#O# 41 magnetite 41 Rocky Mountain Mid Continent 41 oxide ore 41 Dutwa 41 Rick Renzi 40 quartz 40 Kazakhmys LSE KAZ 40 moly 40 palladium platinum 40 electrowinning 40 flotation circuit 40 Arthur H. Rotstein 40 ore 40 vanadium pentoxide 40 gallium