Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

March 27, 2007 07:00 ET

Dia Bras Drills 43 Metres of 2.2% Cu and 13.1% Zn at Bolivar Mine

MONTREAL, QUEBEC--(CCNMatthews - March 27, 2007) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to announce more high-grade drill intercepts from its underground drilling program at the Bolivar Mine in the State of Chihuahua, Mexico.

Drilling of both the Fernandez and the Rosario trends returned high-grade intercepts. Moreover, along the recently discovered Selena breccia zone, part of the Fernandez trend, an intersection yielded 21.0 m grading 3.3% Cu and 22.3% Zn. Several holes in this lens returned high grades of copper and zinc. Furthermore, four (4) holes intersected massive sulfide in the Rosario trend, where the best section returned 8 metres grading 33.8% Zn and 0.7% Cu. The Fernandez and Rosario lenses are part of the Upper Skarn Unit at Bolivar.

"These drill results support our interpretation that massive, high-grade mineralization in both the Fernandez and the Rosario trends continues along strike and to depth below our present workings," said Dr. Thomas L. Robyn, Executive Chairman, "These new drill intercepts open a large exploration area for the discovery of more high-grade sulfide mineralization at the Bolivar Mine. The Bolivar mineralizing system was a powerful system and we have only begun to probe the fringes of it."

UNDERGROUND DRILLING

The underground holes were drilled from the mine's level 6. Holes DB06BM066 through 71 tested the downward extension of the Selena breccia in the Fernandez zone, which trends ESE.

Drilling of the Selena Breccia produced the following results:



Selena Breccia

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Drill Hole From To Length Cu Zn Au Ag
m m m % % ppm ppm
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DB07BM066 0.0 21.0 21.0 2.2 18.8 0.10 18.5
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Incl. 0.0 10.0 10.0 3.6 33.4 0.08 21.8
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DB07BM067 0.0 14.5 14.5 2.9 23.8 0.69 41.3
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DB07BM068 0.0 13.0 13.0 2.5 24.9 0.09 20.1
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DB07BM069 0.0 15.6 15.6 1.3 11.3 0.08 19.6
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Incl. 2.5 4.5 2.0 4.4 35.0 0.08 24.9
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and 12.3 13.6 1.3 5.2 40.5 0.32 61.9
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DB07BM070 0.0 43.0 43.0 2.2 13.1 0.07 22.1
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and 0.0 21.0 21.0 3.3 22.3 0.12 30.9
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DB07BM071 15.0 34.5 19.5 0.9 8.8 0.04 7.3
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Incl. 28.0 33.0 5.0 2.8 27.4 0.05 12.4
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The Selena breccia plunges to the ESE and is contained within an extensive zone of skarn-hosted disseminated to semi-massive sulfide mineralization related to the Fernandez trend. The limits of the high-grade breccia have not been drilled off, and the massive mineralization remains open down-plunge and may be part of a major feeder pipe.

Drilling from level 6 of the Rosario zone also encountered skarn-hosted mineralization and produced the following results:



Rosario Zone
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Drill Hole From To Length Cu Zn Au Ag
m m m % % ppm ppm
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DB07BM061 0.0 16.5 16.5 0.4 14.7 0.02 6.03
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Incl. 0.0 6.0 6.0 0.8 31.8 0.08 26.3
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DB07BM062 0.0 18.0 18.0 0.4 17.5 nr 9.4
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Incl. 0.0 8.0 8 0.7 33.8 nr 9.8
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DB07BM063 0.0 8.0 8.0 0.66 18.7 nr 10.8
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Incl. 0.0 4.0 4.0 1.08 30.6 nr 16.9
---------------------------------------------------------------------
DB07BM064 0.0 9.0 9.0 0.5 15.5 0.05 9.8
---------------------------------------------------------------------
Incl. 26.0 28.5 2.5 0.5 14.0 0.10 64.4
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nr equals not reported


These results, combined with results from previously reported (see press release, February 27, 2007) surface drilling, show that massive sulfide mineralization continues to depth along the Rosario-Rodolfo trend. The exploration team is successfully testing the potential of what appears to be a rhomboidal structural pattern (see attached figure http://www.ccnmatthews.com/docs/DIBA0327.pdf) to access the map containing the high-grade massive sulfide mineralization of the Rosario/Fernandez/Brecha Linda trends. Repetition of this pattern is expected to occur along the entire extent of the Upper Skarn Horizon, a very fertile trend stretching over 3.0 km. This concept is supported by the high grades of copper and zinc mineralization that occur at El Val, La Pequena and La Narizona (see press release, December 14, 2006).



Conference call

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Dia Bras will hold a conference call for analysts and investors to
discuss the progress of its Bolivar Project on March 27, 2007 at 4:00
p.m. Eastern.

Dr. Thomas L. Robyn, Executive Chairman, will be available to answer
question following its statement.

TIME: 4:00 PM Eastern on Tuesday, March 27, 2007 (TODAY)

To participate in the call, please call one of these numbers at least
15 minutes prior to the start of the event.

Teleconference Information

Toll Free (North America): 1-866-334-3876

Toronto/International (Europe and Mexico): 1-416-849-4292

Replay

Toll Free (North America): 1-866-245-6755

Toronto/International (Europe and Mexico): 1-416-915-1035

Conference ID: 861108

Teleconference Replay Available Until: April 27, 2007

Webcast
A live audio webcast of the conference will be available at:
www.diabras.com/en/presentation.php

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