Name and Location
Oyu Tolgoi copper/silver/gold complex, Southern Gobi region, Mongolia.

Client
Turquoise Hill/Rio Tinto (66%) and Erdenes Oyu Tolgoi (34%).

Project Description
Oyu Tolgoi has the mineral resources to become one of the world’s top three copper/gold producers.

The project entails the construction and operation of an initial concentrator facility that will process 100 000 t/d of ore or 36.5-million tons a year. By the end of the fifth year of operation, the concentrator’s capacity will be expanded to 160 000 t/d or 58-million tons a year.

Under the common start-up plan, ore will initially be sourced from the openpit mine on the Southern Oyu deposits, while the adjacent higher-grade underground mine on the Hugo North deposit, will be developed to full production of 95 000 t/d.

The mine is expected to produce more than 1.2-billion pounds (544 000 t) of copper, three-million ounces of silver and 650 000 oz/y of gold in the first ten years of operation. Seven years later, at its peak, it is expected to produce about 1.7-billion pounds of copper and one-million ounces of gold.

Value
The final cost of the Phase 1 capital project is expected to be about $6.6-billion, within 3% of the initial budget, excluding foreign-exchange exposures.

The Phase 2 capital estimate is $5.1-billion.

Duration
Commercial production from the openpit operation is planned for the first half of 2013.

First ore was processed through the concentrator on January 2 and the first copper/gold concentrate was produced on January 31.

Initial production from the underground mine is expected in 2016.

Latest Developments
Rio Tinto’s plan to start exporting copper from the $6.2-billion Oyu Tolgoi mine on June 21 has been delayed at the request of the Mongolian government.

Journalists had been invited to attend a ceremony at the copper and gold mine on June 14 to mark the first exports. That was postponed to June 21, but the event was again cancelled at the last minute. Mongolia is due to hold a presidential election on June 26.

The company has declined to comment on the reasons for the latest delay.

The event on June 14 had been postponed, owing to the Mongolian government demanding that Rio Tinto keep all export revenue in the country, according to Prime Minister Norov Altankhuyag.

"Rio Tinto is keen to start shipping as soon as possible in order for the benefits from Oyu Tolgoi to start flowing to all parties, including the people of Mongolia," says Rio Tinto spokesman Bruce Tobin.

"Shipping will commence as soon as the government indicates its support for us to do so."

Rio has maintained since February that it will not export until it resolves disputes with the Mongolian government over royalties, costs, management fees and project financing.
The latest delay may be to stave off controversy ahead of the presidential poll, as Oyu Tolgoi is the biggest foreign investment in the country and resource nationalism has been a major election issue.

Key Contracts and Suppliers
Fluor Corporation (project management), Amec (feasibility study for Lift 1 of the Hugo North underground block-cave operation), RSV Enco Consulting (shaft engineering), AC-Tek (dynamic simulation of underground conveyors) and Analytical Laboratory Consultants (laboratory service design on the project).

On Budget and on Time?
The project is on track to begin commercial production in the first half of 2013.

Contact Details for Project Information
Oyu Tolgoi, tel +976 11 331880, fax +976 11 331890 or email OTLLCinfo@ot.mn.
Turquoise Hill Resources media contact Tony Shaffer, tel +1 604 648 3934 or
email tony.shaffer@turquoisehill.com.
SGS manager on-site laboratories Pierrette Prince, tel +1 416 445 5755, fax +1 416 445 4152 or
email pierrette.prince@sgs.