Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

February 27, 2007 12:03 ET

DIA BRAS: 2006 Exploration Results and 2007 Exploration Program on the Cu-Zn Bolivar Property

MONTREAL, QUEBEC--(CCNMatthews - Feb. 27, 2007) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report new results of the 2006 exploration activities at Bolivar as well as on its 2007 proposed exploration program

The Company will be exhibiting at the PDAC in Toronto, March 4-7, 2007 in the Metro Toronto Convention Centre. Come and meet with Dr. Thomas L. Robyn, Executive Chairman, Rejean Gosselin, President and other members of the team at Booth 4031! Dr. Robyn will also present in room 205D, on Monday March 5 at 3:20 p.m.

2006 results

One of the most significant achievements of the 2006 exploration program was the discovery of a series of high-grade skarns and breccias that led to the extraction of 96,575 tonnes at 12.64% combined Cu-Zn in the Upper Skarn Horizon at the Bolivar Mine. A new copper-zinc horizon embedded within a stratigraphic marker of magnetite skarn was discovered and named the Lower Skarn Horizon.

More than 10,000 metres of drilling was performed at Bolivar in 2006. The most significant intersections are included in table 1.

The 2007 Program

The 2007 program will encompass three strategic activities. Drilling will aim at defining resources, expanding known resources and exploring for new ore bearing structures. Four drill rigs will be used full time on this program; two will be dedicated to resource definition, one on the extension of the known resource area and one on exploration. To view the proposed 2007 drill program please click on the following link: http://www.ccnmatthews.com/docs/DIABRAS_MEXICANA.pdf

Resource definition

A 5,000 meter drilling program will be undertaken on the Upper and Lower Skarn Horizon from the Bolivar mine to El Gallo in order to obtain a 43-101 resource definition of the Bolivar area. A number of short holes (200 m vertical) will be done to complete in-fill drilling of both Lower and Upper Skarn mineralized units along a continuous trend extending from the Bolivar mine to El Gallo where hole DB06B177(i) cut three mineralized sections including 4 meters at 16.68% Zn and 1.74% Cu .

Extension of the known resource area

A 15,000 meter drilling program will allow the Company to evaluate the extension of the high-grade targets of the Upper Skarn Horizon and also test the Lower Skarn Horizon North and East of the Bolivar Mine. An hexagonal drilling pattern of 175 x 50 should allow Dia Bras to systematically intercept the structural trend of the mineralized zones. This program will focus on the immediate area of the known mine resource and multiple showings (Bolivar NW, La Increible, El Gallo, Montura). Multiple targets include:

- the upper Cu-Zn skarn: exposed from Bolivar Cu-Zn Mine to El Val greater than 3-5 million tonnes potential at 1.5 -2% Cu + 8-10% Zn

- the lower Cu-Fe skarn exposed from Bolivar Mine to El Val and drilled over an area of 800 x 400m, with greater than 20-60 Mt potential @ 2-4% Cu, 20-40% Fe, 50-100 g/t Ag, 1-2 g/t Au

- Cananea-type breccia pipes at Increible 1-5 Mt @ 5-8% Cu, 100-200 g/t Ag, 1-3 g/t Au

Exploration drilling

An exploration drilling program of 5,000 meters will allow the Company to demonstrate the tonnage potential of the Bolivar property. This drilling will be dedicated to test the strike extension of the favourable Upper and Lower skarn horizons over 2,000 m of strike length from La Montura to El Val.

The Company has already reported high grade channel samples from surface in that area (press release of December 14, 2006). There are multiple exploration targets at Bolivar including replacement/skarn deposits (10-15 Mt each @ 8-10% Zn, 1-2% Cu, 200-300 g/t Ag, 1-2 g/t Au) and a copper porphyry deposit (100-300 Mt@2-4% Cu, 1-3 g/t Au).

Method of analysis

The samples were analyzed by ICP and AA methods by Chemex at their facilities in Vancouver, Canada.

The technical content of this news release has been approved by Andre St-Michel, engineer and Executive Vice-President of Dia Bras, a Qualified Person as defined in NI43-101.



Table 1
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From To Width Cu Zn Au Ag
Meter Meter Meter (%) (%) g/t g/t
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BOLIVAR SOUTH
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DB06B165(i) US 81.5 90.5 9.0 1.26 6.78 0.24 3.87
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DB06B181 - LS 438 439.2 1.2 0.30 3.43 0.06 4
and LS 446 449 3.0 1.08 1.10 0.37 63
incl. LS 447 448 1.0 2.06 1.29 0.59 138
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EL GALLO
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DB06B177(i) US 135 139 4.0 1.74 16.68 0.02 20
incl. US 136 138 2.0 1.33 28.20 0.00 16
and LS 153 162 9.0 1.34 0.08 0.08 26
incl. LS 156 159 3.0 1.94 0.06 0.02 35
and LS 203.5 219 15.5 1.20 0.09 0.25 26
incl. LS 203.5 209 5.5 1.63 0.12 0.36 45
-----------------------------------------------------------------------
DB06B178 LS 237.4 245.7 8.3 1.03 0.20 0.24 21
and LS 248 253 5.0 1.09 0.35 0.15 23
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-----------------------------------------------------------------------
LA INCREIBLE
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DB06B183 LS 285 290 5.0 1.14 0.04 0.16 14
and LS 304.6 307 2.4 1.35 0.04 0.23 7
-----------------------------------------------------------------------
-----------------------------------------------------------------------

MINE BOLIVAR
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From To Width Cu Zn Au Ag
Drill Hole Meter Meter Meter (%) (%) g/t g/t
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ROSARIO
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DB06B159(i) US 101.0 111.3 10.3 0.36 10.59 0.1 14.8
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DB06BM043(i) US 18.9 30.8 11.9 1.91 7.61 0.14 52.8
incl. US 25.5 27.0 1.5 1.36 18.35 0.07 39.0
incl. US 27.0 27.8 0.8 3.94 11.70 0.13 61.5
incl. US 28.4 29.1 0.7 3.82 15.50 0.08 61.0
incl. US 30.5 30.8 0.3 8.04 38.30 0.14 57.9
-----------------------------------------------------------------------
DB06BM044 US 4.6 9.2 4.6 0.46 4.57 0.01 4.47
incl. US 4.6 5.5 0.9 0.96 8.09 0.02 8.40
and US 19.0 22.5 3.5 0.72 6.50 0.03 11.96
incl. US 19.5 20.5 1.0 2.46 21.80 0.09 37.90
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DB06BM045 US 1.5 12.0 10.5 0.43 3.25 0.11 7.98
and US 35.4 39.5 4.1 0.47 5.17 0.08 9.84
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DB06BM051 US 14.3 16.3 2.0 3.67 23.50 0.44 68.4
and US 18.0 20.0 2.0 1.95 5.90 0.17 52.7
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FERNANDEZ
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DB06BM039(i) US 40.7 50.4 9.7 3.56 35.3 0.00 29.3
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DB06BM050 LS 69.0 72.1 3.1 2.39 0.21 0.08 38.98
and LS 86.0 88.0 2.0 1.23 1.37 0.14 30.50
and LS 94.0 98.0 4.0 1.16 0.12 0.13 26.78
-----------------------------------------------------------------------
DB06BM053 US 19.2 32.0 12.8 1.41 1.28 0.10 37.04
and US 62.0 67.5 5.5 0.58 4.20 0.050 21.23
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DB06BM054 US 6 8 2 1.98 16.3 0.31 40.6
and US 118 120 2 1.31 8.36 0.05 8.75
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DB06BM056 US 13.9 16.2 2.3 1.12 3.06 0.02 16.6
incl. US 14.9 15.2 0.3 6.13 21.00 0.05 60.90
-----------------------------------------------------------------------
DB07BM057 US 97.3 107.9 10.6 0.13 2.42 0.03 5.09
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DB07BM058 US 2 4 2.0 1.14 17.68 0.08 23.85
and US 32.6 35.1 2.5 0.41 9.74 0.02 5.50
-----------------------------------------------------------------------

LS equals Lower Skarn
US equals Upper Skarn
B equals Surface drilling
BM equals Underground drilling
(i) Previously announced


About Dia Bras

Dia Bras is a Canadian exploration mining company focused on precious and base metals in the State of Chihuahua, in northern Mexico. The Company is committed to developing and adding value to its assets -- the Bolivar copper-zinc project and the Cusi silver mining camp. The Company trades on the TSX Venture Exchange, under the symbol "DIB".

Contact Information

  • Dia Bras Exploration
    Thomas L. Robyn
    Executive Chairman
    514-393-8875 ext. 241
    or
    Dia Bras Exploration
    Rejean Gosselin
    President
    514-393-8875 ext. 241
    or
    Sun International Communications
    Nicole Blanchard
    Managing Partner
    450-627-6600