sentences:  Tavan Tolgoi is 15 km SW from Tsogttsetsii sum center, 98 km E from Ömnögovi Province center Dalandzadgad.It is 150 km from Oyu Tolgoi and about 240 km north of the Chinese border.The Tavan Talgoi deposit was discovered by a Soviet exploration team that included the first Mongolian geologist Jaltsavyn Dugersuren in 1945, and exploratory drilling and feasibility studies continued until 1985.