Feasibility Study Approved for Turquoise Hill's Oyu
Approximately 80 percent of Oyu Tolgoi's value resides in the underground because the copper grades are roughly three and a half times higher than the open pit," added Tygesen. Following the filing of revised schedules for the statutory feasibility study with the Mongolian Minerals Council in August 2015, pre start activities began in parallel with an update to the capital estimate, which