Mansfield Minerals Inc.
TSX VENTURE : MDR

Mansfield Minerals Inc.

June 06, 2007 17:18 ET

Mansfield Minerals Inc.: Further Work Warranted at La Frontera, Argentina

VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 6, 2007) - Mansfield Minerals Inc. (TSX VENTURE:MDR) -

Mansfield Minerals Inc. (the "Company") has received the results of the previously announced drilling campaign undertaken by Apex Silver Mines Ltd. ("Apex") on the La Frontera property located in western Catamarca province, Argentina. Between September 2006 and February 2007, Apex completed 2,150 metres of core drilling in 12 holes. The table below summarizes the more important results of that program.



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La Frontera Project
Apex Silver Mines Ltd. Drilling Results - June 2007
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Hole Gold Silver
Number Interval Width (ppm) (ppm)
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LFD-001 147-149 m 2 m 0.55 50.00
153-172 m 19 m 0.29 99.00
incl. 169-172 m 3 m 1.27 283.00
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LFD-002 NSV
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LFD-002B 84-85 m 1 m - 51.00
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LFD-003 NSV
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LFD-004 86-87 m 1 m 0.30 11.00
113-114 m 1 m 1.92 117.00
120-121 m 1 m 0.10 63.00
172-173 m 1 m 0.01 57.00
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LFD-005 NSV
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LFD-006 NSV
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LFD-007 87-89 m 2 m 0.61 18.00
91-93 m 2 m 0.85 3.50
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LFD-008 27-30 m 3 m - 63.00
48-53 m 5 m 0.99 52.60
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LFD-009 NSV
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LFD-010 60-89 m 29 m - 60.00
incl. 70-71 m 1 m 0.33 305.00
incl. 80-81 m 1 m 0.20 209.00
92-93 m 1 m - 150.00
96-100 m 4 m - 90.75
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LFD-011 NSV
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A map of the drill hole locations has been posted on the Company's website and can be viewed at www.mansfieldminerals.com/s/LaFrontera.asp.

Qualified Person and Quality Assurance and Control - Apex's exploration program is supervised by Robert B. Blakestad, M.Sc., P. Geo., and Apex's Vice President, Exploration. Analysis is being performed by Alex Stewart Laboratories, Mendoza, Argentina, and includes a regular program of sample checks and repeats as well as blanks and standards. Multi-acid digestion is utilized in conjunction with 35-element ICP analysis and fire assay with gravimetric finish is employed for precious metals analysis.

This news release was reviewed and the contents have been verified by John M. Leask, P.Eng., Director of the Company and a Qualified Person as defined by National Instrument 43-101 (Standards of Disclosure for Mineral Projects).

About Mansfield Minerals Inc.

Mansfield is a mining exploration company which has focused its activities in northwestern Argentina since August 1994. The Company's current significant properties and projects consist of mineral rights covering approximately 190 square miles in three Argentine provinces and one Canadian province. The Company is currently focused on two primary projects which include Lindero (gold) and Rio Grande (copper-gold). Apex can earn an initial 55% interest in La Frontera by spending US$2,000,000 in exploration expenditures and making US$600,000 in property payments over 4 years, and may earn an additional 10% interest by spending USD$1,000,000 in exploration expenditures in the 12 month period following vesting.

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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