Mansfield Minerals Inc.
TSX VENTURE : MDR

Mansfield Minerals Inc.

April 12, 2007 17:04 ET

Mansfield Minerals Inc.: More Near Surface High-Grade at Lindero, NW Argentina

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - April 12, 2007) - Mansfield Minerals Inc. (TSX VENTURE:MDR) -

Mansfield Minerals Inc. (the "Company") has received assay results for a further 17 diamond drill holes at its 100% owned Lindero gold property located in northwest Argentina. The total number of holes now reported is 67. High grade mineralization intersected in Holes LDH-65 and LDH-67 lies on an east-west section, 140 metres north of previously reported Hole LDH-19 (274 metres at 1.65g/t Au). The deposit remains open for expansion in several areas with a number of high-grade zones requiring further delineation by drilling. The following is a synopsis of the recent drilling.



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From To Interval
Hole No. (m) (m) (m) Au g/t
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LDH-51 242.00 294.00 52.00 0.46
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LDH-52 116.00 188.00 72.00 0.72
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LDH-53 6.00 222.00 216.00 0.82
includes 30.00 162.00 132.00 1.02
includes 30.00 78.00 48.00 1.35
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LDH-54 120.00 172.00 52.00 0.91
includes 122.00 156.00 34.00 1.02
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LDH-55 8.00 78.00 70.00 NSV
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LDH-56 58.00 80.00 22.00 0.76
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LDH-57 322.00 368.00 46.00 0.71
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LDH-58 74.00 154.00 80.00 0.89
includes 74.00 132.00 58.00 1.05
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LDH-59 32.00 70.00 38.00 0.46
includes 62.00 70.00 8.00 0.85
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LDH-60 0.00 120.00 120.00 0.91
includes 24.00 90.00 66.00 1.13
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LDH-61 42.00 94.00 52.00 0.80
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LDH-62 1.52 86.00 84.48 1.12
includes 18.00 82.00 64.00 1.26
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LDH-63 2.44 50.00 47.56 0.61
includes 6.00 34.00 28.00 0.72
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LDH-64 68.00 130.00 62.00 0.60
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LDH-65 1.52 166.00 164.48 1.05
includes 1.52 104.00 102.48 1.40
includes 1.52 32.00 30.48 2.00
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LDH-66 80.00 104.00 24.00 0.80
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LDH-67 0.91 114.00 113.09 1.38
includes 0.91 66.00 65.09 2.02
includes 0.91 34.00 33.09 2.95
-------------------------------------------------------------------


The Company plans to continue delineation and expansion drilling at Lindero through the Argentine winter season. A map of the drill hole locations has been posted on the Company's website and can be viewed at www.mansfieldminerals.com/s/Lindero.asp.

Security - Chain of Custody and Quality Control

Two metre lengths of HQ core samples were halved with a diamond saw and bagged at the field facility. The bags were tied with plastic color-coded security ties. Sample bags were then placed in shipping boxes and couriered by company vehicle to the Acme Analytical Laboratories S.A. prep lab in Mendoza, Argentina. Samples are prepped and fire assayed at Acme facilities in Mendoza, Argentina. Part of the pulps are shipped by Acme to their lab in Santiago, Chile for further assaying. The Company employs a Quality Control program consisting of re-assaying in two different Assay Laboratories randomly selected coarse reject samples and pulps samples, and also insertion of a pulp standard samples, a coarse blank and a duplicate each 20 samples in the field.

This news release has been reviewed by Gordon P. Leask, P.Eng., President of the Company, and a Qualified Person ("QP") 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 260 square miles in three Argentine provinces and one Canadian province. The Company is currently focused on three primary projects which include Lindero (gold), Rio Grande (copper-gold) and La Frontera (silver-gold).

On behalf of the Board of Directors,

Gordon P. Leask, P.Eng., President

We seek Safe Harbor.

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

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