The Oyu Tolgoi mine, also Oyuutolgoi, is a combined open pit and underground mining project in Khanbogd sum within the south Gobi Desert, approximately 235 kilometres east of the Ömnögovi Province capital Dalanzadgad. The site was discovered in 2001 and is being developed as a joint venture between Turquoise Hill Resources with …The Oyu Tolgoi mine, also Oyuutolgoi, is a combined open pit and underground mining project in Khanbogd sum within the south Gobi Desert, approximately 235 kilometres east of the Ömnögovi Province capital Dalanzadgad. The site was discovered in 2001 and is being developed as a joint venture between Turquoise Hill Resources with 66% ownership and the Government of Mongolia with 34%. The mine began construction as of 2010 and shipped its first batch of copper on 9 July 2013.