 Also that year, Rio Tinto promised that it will not make any attempts to take over Ivanhoe Mines before October 18, 2011 (Rio Tinto's possible interest in the company is limited to 46.65%).2012 - April - Ivanhoe Mines sells its 57.6% share of SouthGobi Resources to Chalco for $889 million.The decision came partly as a result of pressure from Ivanhoe's largest shareholder Rio Tinto to sell non core assets.