 Another project in the Detour Lake area of Ontario ranks 4th among North America's deposits (up from six in July 2010).Among the largest gold containing properties controlled by Canadian companies is Goldcorp's wholly owned billion ounce silver, 18 million ounce gold Penasquito mine in Mexico and Ivanhoe Mines' 81.3 billion pound copper, 46.4 million ounce gold Oyu Tolgoi deposit in Mongolia.Barrick Gold owns 50% of Super Pit, Australia's biggest gold mine.