MINERAL RESOURCES LIMITED — M&A Activity 2010

Jun 1, 2010

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Mineral Resources Limited

25 Wellard Street Bibra Lake WA 6163 Ph 08 9434 4922 Fax 08 9434 4955 ABN 33 118 549 910 ACN 118 549 910

2 June 2010

ASX Announcement

MRL receives acceptances for 53% of Mesa shares

Mineral Resources Limited (“MRL”) announces that its takeover offer for all the ordinary shares of Mesa Minerals Limited (“Mesa”) has received acceptances providing MRL with a relevant interest of 53.04% of Mesa shares as at the close of business today.

MRL Executive Chairman Peter Wade said:

“Our takeover offer has met with overwhelming support and we have been able to welcome over 1,400 former Mesa shareholders to our register. We are particularly pleased that Auvex Resources Limited (“Auvex”), one of Mesa’s major shareholders, has accepted the offer and chosen to join the MRL group.

Mesa further complements MRL’s existing suite of manganese assets and represents an integral component of our strategy to build a sustainable and profitable bulk commodities business.”

Mr Wade noted that, despite the acceptance levels already achieved, the stake held by Mighty River International Limited (“Mighty River”) still represents a material obstacle to the availability of CGT rollover relief for former Mesa shareholders.

“We call upon Mighty River to accept our offer not only to secure an attractive return on its investment in Mesa for its own shareholders, but also to ensure that CGT rollover relief is available for all former Mesa shareholders.

MRL has provided full and fair value under its offer. We believe that acceptance by Mighty River would produce a win-win outcome for all stakeholders. We would be delighted to welcome Mighty River as an investor in MRL.”

MRL today announced that it has extended its share offer by two weeks until 16 June 2010 , in order to provide remaining Mesa shareholders with the opportunity to accept the MRL offer. As a result of acquiring a relevant interest in more than 50% of Mesa’s shares today, this two week extension has occurred automatically under the Corporations Act.

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Mineral Resources Limited

25 Wellard Street Bibra Lake WA 6163 Ph 08 9434 4922 Fax 08 9434 4955

ABN 33 118 549 910 ACN 118 549 910

Mr Wade called upon remaining Mesa shareholders to accept the MRL offer in order to participate in the significant opportunities that the new combined MRL / Mesa group can enjoy from the successful completion of the takeover.

Mineral Resources Limited is a leading, integrated, Australian based mining services and processing company with operations in contract crushing, general mine services, infrastructure provision and recovery of base metal concentrate for export. Operations are supplemented by rehabilitation and sale of heavy duty crushing and processing equipment, hire of engineering and crushing fleet plant and workshop manufacture of polyethylene pipe fittings and components.

Comprising three long standing core businesses, PIHA Pty Ltd, Crushing Services International Pty Ltd and Process Minerals International Pty Ltd, Mineral Resources Limited has developed a strong reputation for the cost effective delivery of its services and products to the resources and infrastructure sectors. Mineral Resources also owns Polaris Metals NL, which is seeking to become an iron ore producer in Western Australia.

Mineral Resources Limited was admitted to the official list of the Australian Stock Exchange on 28 July 2006.

For further information contact: Peter Wade Executive Chairman / Managing Director Telephone: (08) 9437 7000 www.mineralresources.com.au