Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

November 15, 2007 08:30 ET

Dia Bras: High Gold and Silver Values at Cusi

MONTREAL, QUEBEC--(Marketwire - Nov. 15, 2007) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report results from its ongoing exploration program on the Cusi property, located in the State of Chihuahua, Mexico.

The regional geological mapping program, under the supervision of Dr. Andre Ciesielski, has revealed the presence of a number of gold-silver veins and breccias not previously reported in the northwestern and central part of the Cusi property. Dia Bras reported in March (see Press Release #8, March 21) and in September (see Press Release #24, September 13) unusually high gold assays from an area known as the San Nicolas Tiro.

A review of these data prompted Dia Bras to start a detailed mapping program in the area under the supervision of Dr. Ciesielski. The mineralization is hosted in a number of N-S structures, of variable width, the most important of which is the La Minerva system.

This area is characterized by three brecciated structures, known as:

- Minerva, quartz stockwork-breccia, limonite-psylomelane breccia, and quartz veins,

- N310 fault, unmineralised limonite-kaolinite breccia,

- Gloria, silicified breccia and quartz veinlets-stockwork.

The Minerva structure strikes N350 and dips 75 degrees and presents variable widths of 0.5 to 2.0 m. The fractures are filled with quartz, and limonite - psylomelane breccia (0.5 to 1.5 m), with quartz stockwork-breccia (0.1 to 1 m), and can be observed at the contact with the wall rock. This structure has been followed for over 200 m. A NE-SW regional fracturation is present everywhere in the Minerva area, and influences the breccia, especially in the south.

The southern extremity of the Minerva structure (N-S) intersects or deviates at another major system known as the Gloria structure (NE-SW).

The northern extremity of the Minerva structure (N-S) intersects a N310 fault (NE-SW). At this point, the structure separates into two fracture systems, a quartz stockwork, the Minerva A, some 50 cm wide, oriented at N165 with a 70 degrees dip, with a strike extent of some 120 m long. The Minerva B consists of a major quartz stockwork, with widths varying from 1 to 4 metres, oriented at N190 with a 70 degrees dip, which extends for some 100 metres.

Samples are either channel or representative chip and grab samples from mineralized zones. All samples were taken on surface from the mineralized structures.

Some of the best results include 1.46 g/t Au with 3,490 g/t Ag, 4.6 g/t Au with 1,530 g/t Ag, 2.49 g/t Au with 794 g/t Ag, 5.51 g/t Au with 719 g/t Ag. The high gold and silver contents are accompanied by low contents of Pb, Zn and Cu, which indicates that this vein system is high in the precious metal zone. This is very encouraging with respect to the amount of mineralized rock that could occur in these structures and others like them in the immediate vicinity.

This area has received limited exploration in the past, and has never been drilled.

These results are very encouraging and a drill program planned for the beginning of 2008 is being prepared to follow up on these excellent results.



Best sample results from the Mnerva area, Cusi Project
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Length Au Ag Pb Zn Cu Mn Fe
SAMPLE Type (m) Resume (g/t) (g/t) (%) (%) (%) (%) (%)
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Bx Ka St
DC07JP263 Channel 0.25 Qtz MnO 1.46 3.490 0.08 0.17 0.02 +5 2.82
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Bx Ka St
DC07JP262-C Grab - Qtz MnO 4.6 1.530 0.29 0.12 0.03 +5 2.32
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Bx Ka St
DC07JP262-B Channel 0.2 Qtz MnO 2.49 794 0.09 0.04 0.01 4.03 1.32
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Bx Ka St
DC07JP261-A Channel 0.2 Qtz MnO 5.51 719 0.41 0.06 0.01 3.43 2.21
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Bx Ka St
DC07JP261-B Channel 0.25 Qtz MnO 1.29 697 0.08 0.05 0.01 +5 1.58
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Bx St
DC07JP260-A Channel 0.15 Qtz MnO 2.85 659 0.20 0.08 0.02 3.69 1.61
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Chip- Bx Fx++ St
DC07JP269-A channel - Qtz MnO 2.23 413 0.36 0.12 0.02 2.48 0.93
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Bx Ka St
DC07JP262-A Channel 0.3 Qtz MnO 3.45 323 0.14 0.06 0.01 +5 1.54
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Chip- Bx Ka+
DC07JP281 channel - Lm MnO 2.3 266 0.17 0.07 0.02 1.66 1.74
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Chip-
DC07JP270-C channel - St Qtz Mno 1.11 254 0.16 0.07 0.01 1.13 0.68
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Chip-
DC07JP270-A channel - St Qtz Mno 2.13 237 0.11 0.18 0.03 2.06 1.26
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Chip-
DC07JP268 channel - Bx Fx++ Lm 1.83 101 0.14 0.05 0.01 1.25 1.13
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Chip- St Vt
DC07JP274 channel - Qtz MnO 1.33 58 0.44 0.08 0.01 2.39 0.91
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Please find attached the location map and the complete table of sample results. (http://www.ccnmatthews.com/docs/DIB1115.pdf)

Method of analysis

Samples were prepared at ALS Chemex lab facility in Chihuahua, Mexico, and analyzed by ICP and AA methods by ALS Chemex at their facilities in Vancouver, Canada.

Quality control

Grab and chip-channel samples sent for analysis consist of 2 to 5 kilo samples (average of 3.5 Kg), prepared by ALS Chemex sample preparation laboratory in Chihuahua, Mexico, and assayed for Au by 50 g fire assay with AA finish and 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 Chemex. 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 statement.

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

Contact Information

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