Mansfield Minerals Inc.

Mansfield Minerals Inc.

July 27, 2005 12:25 ET

Mansfield Minerals Inc.: Agreement Signed on La Frontera, Argentina with Apex Silver Mines

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - July 27, 2005) - Mansfield Minerals Inc. (the "Company") (TSX VENTURE:MDR) is pleased to announce that it has entered into an agreement with Silex Argentina S.A. ("Silex"), a wholly owned subsidiary of Apex Silver Mines Ltd., on its 100% owned La Frontera property located in Catamarca Province, Argentina. Under the terms of the agreement, Silex may earn a 55% interest in the project by making option payments of US$600,000 and completing exploration expenditures of US$2.0 million over a four-year period, including a firm commitment of US$100,000 in exploration expenditures in the first year. Upon vesting, Silex may earn an additional 10% interest by completing a further US$1.0 million in exploration expenditures over a subsequent one year period.

On behalf of the Board of Directors,

Gordon P. Leask, P.Eng., President

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

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