Orosur Mining Inc. Announces 2010 Fourth Quarte...

Orosur Mining Inc. Announces 2010 Fourth Quarter and Full Year Earnings and Investor Update Conference Call and Web Cast

Orosur Mining Inc.

Orosur Mining Inc. ("OMI" or the "Company") (TSX VENTURE:OMI) (LSE: OMI) announces that it will hold its fiscal 2010 quarterly and full year earnings and investor update conference call on Thursday September 9, 12:00 Eastern Time, 17:00 UK time.

The Company’s CEO, David Fowler, will brief investors on fiscal year 2010 operating results, resource estimate for Pantanillo, Arenal Deeps feasibility study and development plans, and answer questions from call participants. Web cast participants may submit questions in advance by email at [e-mail]

The conference call can be accessed by dialing [phone] (Canada and US) or [phone] (UK and International). All participants will be required to register with the operator.

A simultaneous web cast of the conference call and replay will be available at http://www.orosur.ca You will need to have Windows Media Player installed on your computer and you will also be required to complete a registration page in order to log on to the webcast.

A slide presentation will also be available prior to the call / web cast for download from the investor relations section of Orosur Mining Inc.’s corporate website at http://www.orosur.ca/investors/presentations/

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

About Orosur Mining Inc.

Orosur Mining Inc. is a fully integrated gold producer and exploration company focused on identifying and developing gold projects in Latin America. The Company operates the only producing gold mine in Uruguay (San Gregorio), and has assembled an exploration portfolio of high quality assets in Uruguay and Chile. The Company is quoted in Canada (TSX-Venture Exchange: OMI) and London (AIM: OMI).

Orosur Mining Inc

David Fowler, CEO

Ignacio Salazar, CFO [phone]

[e-mail]

or

Matrix Corporate Capital LLP (Nominated Adviser & Broker)

Louis Castro, [phone]

Tim Graham, [phone]

or

Blythe Weigh Communications

Tim Blythe: [phone]

Ana Ribeiro: [phone]

Matthew Neal: [phone]