Co-O Mine Mineral Reserve Estimate (7654M)

TIDMMML

RNS Number : 7654M

Medusa Mining Limited

22 August 2011

MEDUSA MINING LIMITED

ABN: 60 099 377 849

Unit 7, 11 Preston Street

Como WA 6152

PO Box 860

Canning Bridge WA 6153

Telephone: [phone]

Facsimile: [phone]

Email: [e-mail]

Internet: www.medusamining.com.au

22 August 2011

Co-O MINE MINERAL RESERVE ESTIMATE

(ASX & LSE: MML)

Medusa Mining Limited ("Medusa" or the "Company"), through its Philippines operating company Philsaga Mining Corporation, announces the annual update of the JORC compliant Ore Reserve estimation for the Co-O Mine.

The Probable Reserve as at 30 June 2011, now stands at 502,000 ounces contained in 1,500,000 tonnes at 10.1 g/t gold.

Conversion of resources during the year has maintained the Probable Reserve contained ounces when compared to that announced on 7 August 2010 of 505,000 ounces at 10.7 g/t gold in 1,465,000 tonnes. The Company policy is to at least maintain a reserve of approximately 500,000 ounces on a yearly basis.

Carras Mining Pty Ltd of Perth, Western Australia was contracted to complete the reserve estimation based on the resource wireframe model provided by Cube Consulting Pty Ltd. Updated Indicated and Inferred Resources were announced on 27 July 2011.

The Probable Reserve was estimated from an Indicated Resource of 1,601,000 tonnes at 12.0 g/t gold containing 616,000 ounces of gold. The estimate was based on a gold price of US$1000 per ounce, a minimum stope width of 1.2 metre and a stope cut-off grade of 3.0 g/t gold.

Peter Hepburn-Brown, Managing Director of Medusa commented:

"In line with our stated policy, we have again replaced the ounces mined during the last financial year through the conversion of Indicated Resources to Probable Reserves, primarily through underground development. This is consistent with the methodology of most narrow vein mines and, based on our large inferred resource base of 1,344,000 ounces, we anticipate being able to annually maintain the mine's reserves of approximately 500,000 ounces and extend the mine's life for many years to come".

DISCUSSION

Compared to the information available at the time of the previous reserve estimate at 21 June 2010, the reserve grade has reduced slightly due to:

- a reduction in the Indicated Resource grade from 13.2 g/t gold as at 21 June 2010 to 12.0 g/t gold as at 30 June 2011, primarily as a result of the addition of more veins into the resource estimate.

- some of the new veins added to the reserve estimate are narrower than the minimum stoping width of 1.2 metres assumed for the reserve estimate, hence additional dilution has been introduced, particularly during on-vein level development which is 1.8 metres wide.

For further information please contact:

 
 Australia 
 Medusa Mining Limited            [phone] 
 Peter Hepburn-Brown, Managing 
  Director 
 Geoff Davis, Chairman 
 United Kingdom 
 Fairfax I.S. PLC                 [phone] 
 Financial Adviser and Broker 
 Ewan Leggat/Laura Littley 
 

Information in this report relating to Mineral Resources has been estimated and compiled by Mark Zammit of Cube Consulting Pty Ltd of Perth, Western Australia. Mr Zammit is a member of The Australasian Institute of Mining & Metallurgy and has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr Zammit consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

Information in this report relating to Ore Reserves is based on information compiled by Dr Spero Carras of Carras Mining Pty Ltd. Dr Carras is a Fellow of the Australasian Institute of Mining & Metallurgy and has 30 years of experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as Competent Person as defined in the 2004 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Dr Carras consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

DISCLAIMER

This announcement may contain certain forward-looking statements. The words 'anticipate', 'believe', 'expect', 'project', 'forecast', 'estimate', 'likely', 'intend', 'should', 'could', 'may', 'target', 'plan' and other similar expressions are intended to identify forward-looking statements. Indications of, and guidance on, future earnings and financial position and performance are also forward-looking statements.

Such forward-looking statements are not guarantees of future performance and involve known and unknown risks, uncertainties and other factors, many of which are beyond the control of Medusa, and its officers, employees, agents and associates, that may cause actual results to differ materially from those expressed or implied in such statements.

Actual results, performance or outcomes may differ materially from any projections and forward-looking statements and the assumptions on which those assumptions are based.

You should not place undue reliance on forward-looking statements and neither Medusa nor any of its directors, employees, servants or agents assume any obligation to update such information.

This information is provided by RNS

The company news service from the London Stock Exchange

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