Chalco to buy up to 60% of SouthGobiin $926- million deal Chinese aluminium giant Chalcohas agreed to pay $926 million for a controlling stake in SouthGobi Resources in a deal with Robert Friedland’s Ivanhoe Resources.Ivanhoe said a sell-down would free up capital that could be invested in the OyuTolgoi mine.Under the deal, state-owned Chalco plans to buy up to a 60 percent stake in SouthGobi for C$8.48 per share.