Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

March 29, 2006 11:24 ET

Dia Bras: Discovers Significant Copper-Iron Skarn at Bolivar South

MONTREAL, QUEBEC--(CCNMatthews - March 29, 2006) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to announce the results of 22 diamond drill holes that have penetrated a significant copper-iron skarn at South Bolivar, located 400 meters south-southeast of the Company's Bolivar mine where pilot-mining is being conducted. The skarn dips gently (20 degrees NE) and has been penetrated over an area 200 meters by 400 meters and is open down-dip. The skarn crops out and has been drilled down-dip to a depth of 300 meters. The skarn body ranges in thickness from 1 meter on its edge to 23 meters, with an average width of 9 meters. Copper values are 0.8 to 4.0% and with a weighted average of 1.5%, magnetite content ranges between 11 and 40% with a weighted average of 26%, silver contents are 11 to 104 g/t with an average of 31.5 g/t, and gold varies from 0.1 to 3.0 g/t, with a weighted average of 0.4 g/t. The drill hole locations are shown on the map attached and detailed results are as follows:



Table I - Drill Results - Bolivar South
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Drill From To Apparent Cu Zn Au Ag Fe
Holes Width % % g/t g/t %
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DB03B002(i) 134.0 142.5 8.50 1.18 0.14 0.09 16.01
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196.0 197.0 1.00 1.18 0.06 0.91 24.60
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DB04B005 109.0 121.0 12.00 2.11 0.03 0.08 45.18
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DB04B017 60.0 62.0 2.00 1.53 0.51 0.03 19.70
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DB05B111 159.0 173.0 14.00 1.37 0.18 0.51 27.09
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DB05B114 152.0 153.0 1.00 0.96 0.09 1.37 20.50
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DB05B122 126.0 128.0 2.00 1.64 0.47 1.05 18.85
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DB05B115 210.0 233.0 23.00 0.92 0.14 0.11 13.75 22.16
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DB05B112 241.0 255.0 14.00 1.30 0.06 0.48 13.59 15.18
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DB05B118 125.0 143.0 18.00 0.54 0.13 0.45 7.24 11.52
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DB05B121 200.0 215.0 15.00 1.29 0.03 0.13 27.84 20.44
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DB05B124 227.5 241.5 14.00 1.77 0.43 0.46 28.92 22.85
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DB05B125 161.0 176.0 15.00 1.38 0.20 0.86 45.35 21.44
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DB05B126 183.0 192.0 9.00 0.74 0.01 0.19 11.03 7.83
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DB05B127 162.0 168.0 6.00 0.70 0.10 0.08 11.90 19.41
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DB05B128 157.0 161.0 4.00 1.14 0.06 3.08 61.35 15.46
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DB05B130 196.0 200.0 4.00 3.95 0.31 0.57 62.65 28.31
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DB05B134 315.4 317.6 2.20 0.69 0.06 0.17 10.46 16.03
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DB05B135(i) 165.0 170.3 5.30 2.23 0.16 1.07 103.78 26.78
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DB05B154 75.0 83.0 8.00 2.25 0.04 0.12 50.08 14.87
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154.0 158.0 4.00 0.56 0.02 0.24 8.03 13.03
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DB05B156 83.0 102.0 19.00 2.06 0.16 0.28 49.22 17.47
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DB06B158 74.0 84.0 10.00 2.77 2.09 0.29 57.33 14.36
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(i) Previously announced


The skarn mineralization is hosted in a dolomitic skarn situated between an underlying granitic intrusion and an overlying hornfels layer. The mineralization of this copper-iron skarn is similar to that of the large copper-iron skarns of the Yerington, Nevada, copper porphyry-skarn deposit and the Company considers the mineralization at South Bolivar to be analogous to that of Yerington. The Yerington skarns are large tonnage and high grade, such as the Pumpkin Hollow (Lyon) skarn reported by the Nevada Bureau of Mines and Geology at 250 million tonnes averaging 0.3% Cu and 40% Fe with a high grade zone of 29 million tonnes averaging 1.2% Cu. Dia Bras is targeting similar tonnes and grades in its ongoing exploration of the South Bolivar copper-iron skarn.

Dr. Thomas L. Robyn, Executive Chairman, is the Qualified Person for technical statements made in this release.

Method of analysis

The analyses were conducted at Chemex Laboratories in Vancouver by fire assay for precious metals and atomic absorption for base methods.

Upcoming program

Dia Bras plans to drill 16,000 meters of diamond core holes at Bolivar during 2006, most of which will be in the vicinity of the South Bolivar skarn and directed at a major increase in the drilled volume of the copper-iron skarn, as recommended by Roscoe Postle to complete their 43-101 resource estimate. In addition, some of the holes will be directed to test the bedrock Cu-Mo-W geochemical anomaly that has been identified in the South Bolivar area as a result of the Company's bedrock sampling program. The anomaly is inferred to be located above the copper porphyry intrusion that has generated the copper-zinc-iron-gold-silver mineralization on the Bolivar property, and the drilling is directed at discovery of this mineralized intrusion. Additional holes will define the copper mineralization at the Increible breccia body.

Many more high priority targets along the 3 kilometres long skarn horizon such as La Increible, La Montura, El Gallo, La Pequena, will also be explored during 2006. Please refer to the other priority targets map attached.

About Dia Bras

Dia Bras is a Canadian mining and exploration Company focused on precious and base metals in the State of Chihuahua, northern Mexico. The Company continues exploration and the active development of its two key projects - Bolivar and Promontorio - in the world-renowned Sierra Madre mineral belt. The Company trades on the TSX Venture Exchange, under the symbol "DIB". For more information and a view of our Mexican exploration activity video, please consult our Web Site at diabras.com

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Forward-looking statements: Except for statements of historical fact, all statements in this news release, without limitation, regarding new projects, acquisitions, future plans and objectives are forward-looking statements which involve risks and uncertainties. There can be no assurance that such statements will prove to be accurate; actual results and future events could differ materially from those anticipated in such statements.

Maps are available on CCNMatthews' website at the following addresses: http://www.ccnmatthews.com/docs/DIA_Map1.pdf ; http://www.ccnmatthews.com/docs/DIA_Map2.pdf

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

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