http://www.mongoliaonline.com/Mining/rio-tinto-ups-stake-in-mongolia-project-partner-ivanhoe/ Rio Tinto Ltd has lifted its stake in Canada's Ivanhoe Mines Ltd to 19.7 per cent under an agreement to jointly develop Ivanhoe's $US3 billion ($A3.29 billion) Oyu Tolgoi copper-gold project in Mongolia. Wed, 28 Oct 2009 17:36:35 EDT en