Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

December 13, 2007 09:38 ET

Dia Bras: More High-Grade Silver Values at the Promontorio and Santa Edwiges Mines of the Cusi Project

MONTREAL, QUEBEC--(Marketwire - Dec. 13, 2007) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report results from its ongoing exploration drilling program on the Cusi property, located in the State of Chihuahua, Mexico.

Due to the size of the property and the high number of potential targets, the Company decided to concentrate its efforts on four interconnecting former mines out of twelve situated in the NW area of the property. Most of the drilling has been aimed at discovering and defining mineralized structural trends and veins within two major sectors of the Cusi Project - Promontorio and Santa Edwiges, both historical producers.

Since the inception of the drilling program in the Cusi District in March 2007, more than 18,000 metres of core drilling have been completed to date, in addition to more than 10,000 metres drilled in 2006. Surface mapping (see press release of November 18, 2007) and surface diamond core drilling (see press release of September 13, 2007) have demonstrated the importance of these two sectors with respect to a resource evaluation.

"These recent results continue to demonstrate the exceptional quality and outstanding potential of the Cusi property, which Dia Bras acquired during 2006, and the commitment of the Company to thoroughly explore the property," said Francois Auclair, Vice-President Exploration.

PROMONTORIO SECTOR

The silver-rich Promontorio sector continues to deliver elevated silver assays over economic widths. The best results are from hole DC07B131 with an interval of 3.2 metres core length (2.8 metres true width) of 595 g/t Ag, and from hole DC07B117 that intersected successively 214 g/t Ag over 3.0 metres core length (estimated true width) and 115 g/t Ag over 12.0 metres core length (estimated true width 11.8 m).

Other important results come from hole DC07B125, which intersected 877 g/t Ag over 1.5 metres core length (1.1 m true width), hole DC07B138, which intersected 132 g/t Ag over 9.0 metres core length (6.4 m true width), and hole DC07B115, which intersected 157 g/t Ag over 4.5 metres core length (3.2 m true width).

At the same time, the Company is conducting a drilling program directed at identifying resources within and adjacent to historical workings (see press release of June 19, 2007) as well as developing underground access through an inclined ramp. As at November 30, some 5,700 metres of core diamond drilling had been completed during 2007 at Promontorio.

The mineralization at Promontorio is associated with fracture-filled, low-sulphidation veins with high precious-metal grades, typical of a high-level epithermal system. The most prominent vein in the sector is Veta A, from which Dia Bras has reported high historical grades as well as drill core data from this vein and from its intersections with crosscutting subsidiary veins (see press release June 7, 2007).

SANTA EDWIGES - SAN ANTONIO - SAN MARINA SECTOR

The best results in this sector are from hole DC07B133, drilled to test the downdip extension of the San Antonio mineralized structure, which intersected 4 metres core length (true width of 2.8 m) of 2.6 g/t Au, 502 g/t Ag, 1.4% Pb and 0.8% Zn, including 9.1 g/t Au, 1 815 g/t Ag, 1.96% Pb and 1.32% Zn over 1 metre core length (true width of 0.7 m). A section of the drill hole DC07B133 is available on the Company's web site at: http://www.diabras.com/en/pdf/newscenter/DC07B133.pdf

DC07B110, drilled to test the eastern extension of the San Antonio pit, at level 1650, which intersected 10.5 metres core length (true width of 7.4) of 100 g/t Ag and 1.7% Zn and 0.6% Pb. In terms of base metal contents, the best hole is DC07B118, drilled under the San Antonio pit, also drilled to intersect the 1650 level and below it, which intersected 8.1% Pb, 20.5% Zn and 77 g/t Ag over a true width of 1.5 metres.

In Santa Edwiges, Dia Bras is driving a ramp to access an historically identified ore shoot and conducting diamond core drilling to identify potential resources. As of November 30th, drilling of some 10,500 metres has been done (+6000 at Santa Edwiges, +3000 at Santa Marina, and +1700 at San Antonio) in that sector.

The Santa Edwiges - San Antonio - San Marina sector consists of multiple fracture-filled quartz-carbonate veins containing high sulphide contents that are typical of the base metal portion (Pb, Zn, Cu) of a zoned, low-sulphidation epithermal vein. This base metal portion of the vein transits upwards to the precious metals (Au, Ag) portion of the vein.



Recent drilling results from the Promontorio Sector:

---------------------------------------------------------------------------
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Drill hole From To Interval Au Ag Cu Pb Zn True
(m) (g/t) (g/t) (%) (%) (%) Width
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DC07B111 119.0 120.5 1.5 0.0 164 0.0 0.1 0.2 1.1
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DC07B113 No mineralisation
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DC07B115 126.5 128.0 1.5 0.0 101 0.0 0.1 0.3 1.1
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174.5 179.0 4.5 0.0 157 0.0 0.2 0.3 3.2
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206.0 207.5 1.5 0.5 115 0.0 0.6 0.1 1.1
---------------------------------------------------------------------------
DC07B117 63.5 66.5 3.0 0.1 214 0.0 0.1 0.1 3.0
---------------------------------------------------------------------------
71.0 72.5 1.5 0.0 170 0.0 0.0 0.0 1.5
---------------------------------------------------------------------------
156.5 168.5 12.0 0.1 115 0.0 0.1 0.1 11.8
---------------------------------------------------------------------------
DC07B119 116.6 117.0 0.4 0.0 127 0.0 0.3 0.3 0.3
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DC07B121 No mineralisation
---------------------------------------------------------------------------
DC07B122 No mineralisation
---------------------------------------------------------------------------
DC07B123 No mineralisation
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DC07B125 74.5 76.0 1.5 0.0 877 0.2 0.1 0.1 1.1
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88.0 88.4 0.4 0.0 182 0.1 0.5 0.4 0.3
---------------------------------------------------------------------------
95.5 97.0 1.5 0.0 149 0.0 0.1 0.1 1.1
---------------------------------------------------------------------------
134.5 136.0 1.5 0.0 104 0.0 0.1 0.2 1.1
---------------------------------------------------------------------------
DC07B126 No mineralisation
---------------------------------------------------------------------------
DC07B127 No mineralisation
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DC07B128 No mineralisation
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DC07B131 81.30 84.50 3.20 0.01 595 0.10 0.10 0.20 2.26
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110.60 111.60 1.00 0.09 405 0.10 0.30 0.30 0.71
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216.50 218.00 1.50 0.05 131 0.10 0.40 0.20
---------------------------------------------------------------------------
DC07B132 86.20 86.80 0.60 0.13 469 0.10 0.20 0.50
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103.50 105.00 1.50 0.01 75 0.00 0.30 0.40
---------------------------------------------------------------------------
117.00 118.50 1.50 0.02 423 0.10 0.20 0.20
---------------------------------------------------------------------------
144.00 147.00 3.00 0.01 138 0.00 0.20 0.20
---------------------------------------------------------------------------
DC07B135 24.50 26.00 1.50 0.08 118 0.00 0.00 0.00
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DC07B137 179.00 186.05 7.05 0.07 125 0.00 0.10 0.20
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DC07B138 42.50 44.00 1.50 0.02 107 0.00 0.10 0.10
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86.00 87.50 1.50 0.01 97 0.00 0.10 0.20
---------------------------------------------------------------------------
90.50 92.00 1.50 0.01 236 0.10 0.20 0.30
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161.00 170.00 9.00 0.05 131 0.10 0.20 0.20
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---------------------------------------------------------------------------


Recent drill results from Santa Edwiges - San Antonio - San Marina Sector:

---------------------------------------------------------------------------
---------------------------------------------------------------------------
Drill hole From To Interval Au Ag Cu Pb Zn True
(m) (g/t) (g/t) (%) (%) (%) Width
---------------------------------------------------------------------------
---------------------------------------------------------------------------
DC07B110 150.0 151.5 1.5 0.0 5 0.0 0.3 1.1 1.1
---------------------------------------------------------------------------
307.5 309.0 1.5 0.4 320 0.0 0.1 0.2 1.1
---------------------------------------------------------------------------
331.5 333.0 1.5 0.0 7 0.0 0.5 1.8 1.1
---------------------------------------------------------------------------
409.5 411.0 1.5 0.3 266 0.0 0.1 0.2 1.1
---------------------------------------------------------------------------
468.0 474.0 6.0 0.0 10 0.1 0.6 1.6 4.2
---------------------------------------------------------------------------
499.5 502.5 3.0 0.0 13 0.0 0.1 1.1 2.1
---------------------------------------------------------------------------
520.5 531.0 10.5 0.1 100 0.1 0.6 1.7 7.4
---------------------------------------------------------------------------
520.5 522.0 1.5 0.2 90 0.2 2.4 5.6 1.1
---------------------------------------------------------------------------
522.0 523.5 1.5 0.1 153 0.1 0.5 0.9 1.1
---------------------------------------------------------------------------
550.5 552.0 1.5 0.1 116 0.1 0.5 0.8 1.1
---------------------------------------------------------------------------
DC07B112 108.5 110.0 1.5 0.0 0.0 0.7 1.2 1.1
---------------------------------------------------------------------------
156.5 165.5 9.0 0.1 43 0.0 0.6 1.1 6.4
---------------------------------------------------------------------------
164.0 165.5 1.5 0.4 43 0.0 0.8 1.6 1.1
---------------------------------------------------------------------------
DC07114 189.5 193.7 4.2 107 0.0 3.0 1.7 3.0
---------------------------------------------------------------------------
191.0 191.6 0.6 0.2 16.4 5.4 0.4
---------------------------------------------------------------------------
DC07B116B No mineralisation
---------------------------------------------------------------------------
DC07B118 184.5 186.0 1.5 0.0 5 0.0 0.8 0.6 1.1
---------------------------------------------------------------------------
219.2 220.7 1.5 0.2 40 0.0 2.3 6.4 1.1
---------------------------------------------------------------------------
427.5 429.0 1.5 0.1 5 0.1 8.1 20.5 1.5
---------------------------------------------------------------------------
DC07B120 No mineralisation
---------------------------------------------------------------------------
DC07B124 179.0 180.5 1.5 0.1 28 0.0 0.9 0.7
---------------------------------------------------------------------------
DC07B129 108.5 110.0 1.5 0.0 8 0.0 0.7 0.6 1.1
---------------------------------------------------------------------------
132.5 134.0 1.5 0.0 5 0.0 0.7 0.6 1.1
---------------------------------------------------------------------------
140.0 143.0 3.0 0.7 8 0.0 1.4 0.6 2.1
---------------------------------------------------------------------------
161.0 162.5 1.5 0.2 5 0.0 0.9 0.5 1.1
---------------------------------------------------------------------------
165.5 167.0 1.5 0.1 8 0.0 0.9 0.8 1.1
---------------------------------------------------------------------------
170.0 176.0 6.0 0.2 23 0.0 1.3 0.4 4.2
---------------------------------------------------------------------------
DC07B130 159.0 160.5 1.5 0.0 8 0.0 0.4 1.0 1.1
---------------------------------------------------------------------------
173.2 177.1 3.9 0.4 27 0.0 3.1 2.0 2.8
---------------------------------------------------------------------------
180.0 183.0 3.0 0.6 8 0.0 1.2 1.5 2.1
---------------------------------------------------------------------------
189.0 190.5 1.5 0.1 48 0.0 0.7 0.6 1.1
---------------------------------------------------------------------------
281.5 281.9 0.4 0.2 8 0.0 0.5 3.7
---------------------------------------------------------------------------
314.0 318.0 4.0 0.0 19 0.1 0.5 1.7
---------------------------------------------------------------------------
342.0 355.0 13.0 0.0 9 0.0 0.6 1.1
---------------------------------------------------------------------------
405.3 405.9 0.6 0.2 19 0.0 0.0 0.1
---------------------------------------------------------------------------
DC07B133 185.0 189.0 4.0 2.6 502 0.1 1.4 0.8 2.8
---------------------------------------------------------------------------
including 185.0 186.0 1.0 9.12 1815 0.07 1.96 1.32
---------------------------------------------------------------------------
DC07B134 66.5 68.0 1.5 0.4 82 0.0 0.2 0.1 1.1
---------------------------------------------------------------------------
123.5 125.0 1.5 0.0 10 0.0 0.6 0.8 1.1
---------------------------------------------------------------------------
DC07B136 169.2 170.0 0.8 0.2 46 0.0 0.7 0.4
---------------------------------------------------------------------------
254.0 255.0 1.0 0.0 12 0.1 0.6 1.0
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Method of analysis

Half-split diamond-drill core samples sent for analysis were prepared by ALS Chemex sample preparation laboratory in Chihuahua, Mexico, and assayed for Ag by AA on 50 g split sample at the ALS Chemex Vancouver laboratory. Assays for Pb, Zn and Cu are done by Induction Coupled Plasma (ICP) at ALS Chemex, Vancouver.

Quality control

The quality assurance-quality control (QA-QC) of Dia Bras has been described in detail in Roscoe Postle Associates' 43-101 report of December 2006 on Cusi.

The technical content of this news release has been approved by Francois Auclair, P. Geo. and Vice-President, Exploration of Dia Bras, a Qualified Person as defined in NI43-101.

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".

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.

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

Contact Information

  • Dia Bras Exploration Inc.
    Thomas L. Robyn
    Executive Chairman
    (514) 393-8875 ext. 241
    or
    Dia Bras Exploration Inc.
    Daniel Tellechea
    President & CEO
    (514) 393-8875 ext. 241
    Website: www.diabras.com
    or
    Sun International Communications
    Nicole Blanchard
    Managing Partner
    (450) 627-6600