Mineral resource

1.97 billion tonnes (Measured, Indicated and Inferred) at 0.59% copper, 0.23 g/t gold, at a copper equivalent of 0.72%, using a 0.3% copper cut-off grade. This results in 11.6 Mt copper and 14.6 Moz gold. At a 0.2% copper cut-off, the contained metal is 12.5 Mt copper and 15.7 Moz gold. (April 2006, classified within the JORC 2004 Guidelines)

Initial Planning Inventory:

657 million tonnes at 0.78% copper and 0.32 g/t gold at a 0.3% copper cut-off grade.

(Note: The Initial Planning Inventory is that component of Measured and Indicated resource used for the economic evaluation of the Tampakan project)

Open pit:

30 Mtpa ore (average)
25 Mtpa waste (average)
Mine life in excess of 25 years

Processing:

Semi autogenous and ball milling; flotation to produce a copper-gold concentrate; selective leaching. Nominal 30 Mtpa throughput.

Average recovery:

Copper: 83 - 88%
Gold: 70%

Concentrate:

Typically 540 ktpa

Concentrate grade:

35 - 40% copper
10 g/t gold

Ave metal in concentrate:

210,000 t pa copper in the first 10 years, and 194,000 t pa over initial 25 year life; 218,000 oz pa gold in the first 10 years, and 196,000 oz pa over initial 25 year life

Direct Project Capital

US$1,386 million

Associated Infrastructure

US$519 million