Dia Bras Exploration Inc.

Dia Bras Exploration Inc.

October 18, 2007 08:30 ET

Dia Bras Exploration Inc./New Discovery at Bolivar: 32.5 Metres of 4.26% Zn at La Narizona Prospect

MONTREAL, QUEBEC--(Marketwire - Oct. 18, 2007) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to announce very encouraging drill intercepts in the La Narizona area from its ongoing surface exploration drilling program at the Bolivar property in the State of Chihuahua, Mexico.

New Discovery

At La Narizona, hole DB07B215 intersected the Upper Skarn from 42.7 to 75.2 metres (32.5 metres drill width), and another skarn zone from 144.5 to 148.8 metres. The Upper Skarn intersections average 4.26% Zn, 0.31% Cu, 21.61 g/t Ag and 0.01 g/t Au over an extraordinary 32.5 metres. Within this wide intersection, two higher grade sections occur, including a 7.9 m section averaging 13.14% Zn, 0.78% Cu, and 55.98 g/t Ag. This 7.9 metre section also contains silver and lead, averaging 55.98 g/t Ag and 0.29 % Pb, with a 0.7 metre sample (48.6 - 49.3 metre core length) assaying 24.4% Zn, 1.29% Cu, 324 g/t Ag and 2% Pb.

The second mineralized intersection in skarn occurs at the level expected of the Lower Skarn, but is significantly different in that it contains very little magnetite and is rich in zinc but poor in copper, averaging some 6.76% Zn, 0.17% Cu and 2.78 g/t Ag over 4.3 m, including a richer 2.1 metre section of 10.65% Zn, 0.28% Cu, 3.7 g/t Ag and 2% Pb.

This mineralization occurs within the sedimentary section between two faults, and mapping and drill data indicate it may have significant dip and strike extent and could represent significant new resources for the Bolivar project (see press release of September 25, 2007).

"This is a very exciting development for our exploration program", says Francois Auclair, Vice-President of Exploration. "The volume potential for this mineralization is major, and the mineralized corridor is very significant as it demonstrates that the high-grade mineralization present at Bolivar Alta Ley where Dia Bras is conducting its pilot-mining activities extends over a much broader area than previously known. An expanded drilling program is planned in 2008."

Drill hole From To Interval Cu (%) Zn (%) Au (ppm) Ag (ppm)
DB07B215 42.7 75.2 32.5 0.31 4.26 0.01 21.6
including 42.7 59.0 16.3 0.60 7.84 0.02 42.1
including 42.7 50.6 7.9 0.78 13.14 0.03 55.98
144.5 148.8 4.3 0.17 6.76 0.01 2.78
including 144.9 147.0 2.1 0.28 10.65 0.02 3.7

The La Narizona prospect is located within the La Montura - El Val corridor, an area some 2.5 km to the SE of the Alta Ley Bolivar mine. The La Narizona area is situated some 500 metres NW of El Val, in an area of exoskarn that is enclosed within andesite in a highly fractured and faulted block. This block represents the hanging wall of the mineralization that has been uplifted with respect to the footwall andesite. In some publications, this corridor is referred to as the Sauzal-Cieneguita lineament (Goodell P., 2003, internal communication to Dia Bras).

At both ends of this corridor, mineralization was previously intersected by drilling, namely in the La Montura area where a drill hole performed by Dia Bras in 2004 intersected 3 metres at 1.2% Cu, 5.4% Zn, 1 g/t Au and 147 g/t Ag in the Upper Skarn and, more recently, in the El Val area, where hole DB07B209 intersected 6.6 metres of 2.6% Zn in the Upper Skarn, and an additional 2.0 metres at an average grade of 7.7% Zn (reported in press release, September 30, 2007) in the Upper Skarn within a broader mineralized intersection from 89 to 123 metres down hole (34 metres drill width).

Detailed mapping done by Dia Bras in the fall of 2006 revealed Upper Skarn mineralization in the historical La Pequena, La Narizona and El Val prospects (see press release of December 14, 2006), and prompted the Company to initiate a drilling program in this area in the spring of 2007. A number of logistical problems, including an unusually strong rainy season, delayed drilling until recently.

Dia Bras' drilling program at El Val-La Narizona is ongoing with one surface high capacity drill rig in operation. As of September 30th, approximately 2,075 metres in 5 drill holes have been completed. Hole DB07B216 is in progress, while results from hole DB07B212 are pending. Hole DB07B194, which was interrupted by technical problems in April, will be completed soon.

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

Diamond drill samples sent for analysis consist of half NQ-size diamond core split on site, 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 North Vancouver Laboratory. Assays for Pb, Zn and Cu are done by Induction Coupled Plasma (ICP) at ALS Chemex. The quality assurance-quality control (QA-QC) of Dia Bras has been described in detail in both RPA's 43-101 reports of December 2006 at Cusi and October 2005 for Bolivar.

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.

Dia Bras at the Toronto Resource Investment

The Company will be exhibiting at the Toronto Resource Investment Conference, October 21-22, 2007. Come visit us at booth #4031. For more information on attending this conference, located at the Metro Toronto Trade & Convention Centre, please go to www.cambridgehouse.ca.

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.

Maps are available at the following address: http://www.ccnmatthews.com/docs/dia1018.pdf

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
    Dia Bras Exploration
    Rejean Gosselin
    President & CEO
    Sun International Communications
    Nicole Blanchard
    Managing Partner