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Press release

Oyu Tolgoi - update on production and operations

Ulaanbaatar, Mongolia,

134,100 tonnes of concentrate produced in third quarter, 2014

Today, Oyu Tolgoi released its quarterly production report, providing an update on production and performance.

Between July and September 2014, Oyu Tolgoi produced 134,100 tonnes of concentrate, bringing total production so far this year to 377,000 tonnes.

In September, concentrate production was impacted by operational damage to the rake arms of one of Oyu Tolgoi's two tailings thickeners. The concentrator operated at approximately 60 per cent throughput during the repairs. Despite reduced throughput, Q3'14 metal production was in-line with the previous quarter due to higher head grades.

Concentrate sales continued to exceed production rates in Q3'14 resulting in further inventory drawdown.

Oyu Tolgoi Chief Financial Officer, Steve Duggan, said: "Our workforce coordinated an impressive effort across the business to safely and quickly repair the thickener rake arms while limiting the overall impact on production.

"We continue to make good progress in moving from the post-commissioning phase of the business into steady-state operations."

Oyu Tolgoi's latest production figures can be found below. Further information can also be found in Turquoise Hill Resources' production report.

Oyu Tolgoi Production Figures Q3 2014 9 Months 2014
Ore Treated ('000 tonnes) 7,029 20,367
Average mill head grades (grades of ore)
Copper(%) 0.59 0.55
Gold(g/t) 0.80 0.64
Silver (g/t) 1.64 1.58
Copper concentrates produced ('000 tonnes) 134.1 377
Average concentrate grade (% Cu) 27.3 26
Total metals produced
Copper in concentrates ('000 tonnes) 36.6 98.2
Gold in concentrates ('000 ounces) 132 311
Silver in concentrates ('000 ounces) 216 608
Sales of metals in concentrates
Copper in concentrates ('000 tonnes) 53.6 118.3
Gold in concentrates ('000 ounces) 144 298
Silver in concentrates ('000 ounces) 323 710

About Oyu Tolgoi LLC (www.ot.mn)

Oyu Tolgoi LLC, Mongolia's largest copper and gold mining company, is a strategic partnership between the Government of Mongolia, Turquoise Hill Resources and Rio Tinto. Located in the South Gobi, Oyu Tolgoi commenced shipment of product to customers in July 2013. Oyu Tolgoi is managed by Rio Tinto, which is investing global expertise and cutting-edge technology to help develop Mongolia’s mining industry and ensure Oyu Tolgoi is one of the world’s most advanced mines. For Oyu Tolgoi, nothing matters more than safety. The business operates under the principle that if a job cannot be done safely, it will not be done at all.

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