南戈壁省
Tavan Tolgoi (, also Tavantolgoi, Tavantolgoy, "Five Hill") is one of the world's largest untapped coking and thermal coal deposits, located in the Ömnögovi Province in southern Mongolia. It has a total estimated resource of 6.4 billion tonnes, one quarter of which is high quality coking coal. It is divided into six sections: Tsankhi, Ukhaa Khudag, Bor tolgoi, Borteeg, and Southwest and Eastern coalfields. The Tsankhi section is the largest part, and is divided into East and West Tsankhi - these have had the most focus recently.