WESTERN YILGARN NL — M&A Activity 2009

Sep 23, 2009

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24 September 2009

The Manager Australian Securities Exchange Limited Company Announcements Office 20 Bridge Street SYDNEY NSW 2000

Dear Sir / Madam

ALUMINEX RES. LTD REVISED OFFER: 1 IRON MTN SHARE FOR EVERY 1 ALUMINEX SHARE

Iron Mountain Mining Limited (“Iron Mountain”) advises that further to its release on 6 August 2009, announcing an off market bid for all shares in Aluminex Resources Ltd (“Aluminex Resources”), it has today varied its bid offer to 1 fully paid share in Iron Mountain for every 1 ordinary share held in Aluminex Resources. All other conditions remain the same.

Yours faithfully

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MARK KILLMIER Company Secretary Iron Mountain Mining Limited

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