Increase in Ranger mine’s reserves and resources

27 October 2005

Rio Tinto’s 68.4 per cent owned subsidiary, Energy Resources of Australia (ERA), issued the following news release in Australia today.

• Total reserves increased by 6,285 tonnes contained uranium oxide.
• Total resources increased by 14,923 tonnes contained uranium oxide.
• These increases result from a reduction in the cut-off grade from 0.12 per cent to 0.08 per cent uranium oxide.
• The additional reserves will be processed between 2011 and 2014, adding three years to the predicted operational life of Ranger.

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