Ivanhoe Mines and Rio Tinto Sign Long-Term Investment Agreement With Mongolia to Build and Operate Oyu Tolgoi Copper-Gold Mining Complex

ULAANBAATAR, MONGOLIA--(Marketwire - Oct. 6, 2009) - Ivanhoe Mines 
(TSX:IVN)(NYSE:IVN)(NASDAQ:IVN) today signed a long-term Investment 
Agreement with the Government of Mongolia that establishes a comprehensive 
framework for the construction and operation of the Oyu Tolgoi copper-gold 
mining complex in Mongolia's South Gobi Region.

The signing, at a state ceremony in Ulaanbaatar, was attended by hundreds 
of invited guests, including the President, the Prime Minister, Cabinet 
members, the Speaker and members of Mongolia's parliament, the State Great 
Khural, and representatives of the international diplomatic community. The 
ceremony culminated nine years of exploration successes that have 
established Oyu Tolgoi as the world's largest, undeveloped copper-gold 
porphyry project.