Mining is important to the national economy of Mongolia. Mongolia is one of the 29 resource-rich developing countries identified by the International Monetary Fund and exploration of copper and coal deposits are generating substantial additional revenue. Coal, copper, and gold are the principal reserves mined in Mongolia. Several gold mines are located about 110 kilometres (68 mi) north of Ulaanbaatar, such as Boroo Gold Mine and Gatsuurt Gold Mine. Khotgor Coal Mine is an open-pit coal mining site about 120 kilometres (75 mi) west of Ulaangom. Ömnögovi Province in the south of Mongolia is home to large scale mining projects such as the Tavan Tolgoi coal mine and the Oyu Tolgoi copper mine. Oyu Tolgoi mine is reported to have the potential to boost the national economy by a third but is su