Dia Bras Exploration Inc.

Dia Bras Exploration Inc.

March 02, 2010 10:30 ET

Dia Bras Develops More High-Grade Rock at Bolivar

MONTREAL, QUEBEC--(Marketwire - March 2, 2010) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report the results of continued drilling, sampling and underground drifting at its Bolivar pilot-mine, Chihuahua State, Mexico. Sampling of drifts and stopes continues to demonstrate the high-grade nature of the mineralization at various areas in the mine. 

"Our exploration and development activities in the Bolivar mine continue to locate high-grade zones that allow us to ship rock to Malpaso for processing and continue to increase the Corporation's knowledge on controls on mineralization in the mine," stated Daniel Tellechea, President & CEO. "In addition to the work being done on the high-grade zones, we are exploring and developing areas that will be mined for rock that will be processed at the Corporation's new mill site, located only 6 km from the mine. For example, a drift is being extended from the San Francisco zone to El Gallo, where significant tonnage for our new mill occurs, and development is progressing at La Increíble."

Drill hole 316 is particularly encouraging because it cut very high-grade mineralization 80 m SSE of Guadalupe (see attached figure), which indicates that the trend of mineralization is present a significant distance from the current workings. The Corporation's mine geologists now believe that the Selena-Guadalupe bodies are on a mineralized trend that is parallel to the Rodolfo-Rosario trend, which indicates significant exploration potential both to the NNW and SSE of these bodies. Drill hole 311 cut the same body as 316, with lower grade, but the textures and mineralogy indicate that the trend continues to the SSE.

The table below summarizes the significant drill results:

Drill Hole From (m) To (m) Core Length (m) Est. True Width (m) % Cu % Zn
Guadalupe Surface Holes
DB09B310 107.0 108.0 1.0 1.0 0.20 5.60
209.4 209.8 0.4 0.4 0.28 16.10
DB09B311 147.7 157.2 9.5 9.5 0.02 1.20
incl. 152.1 152.3 0.2 0.2 0.38 20.20
DB09B316 150.8 157.5 6.7 6.7 1.50 11.25
incl. 155.9 157.5 1.6 1.6 5.98 39.60
Guadalupe Underground Holes
DB09BM232 1.18 8.45 7.27 3.50 3.85 33.62
DB09BM234 1.3 6.6 5.3 3.50 4.57 41.34
San Francisco Surface Holes
DB09B312 52.35 52.80 0.45 0.45 4.97 45.69
DB09B313 76.5 77.8 1.3 1.30 0.98 17.95
82.7 83.0 0.3 0.30 0.10 12.05

Production continues from several areas of the mine. Samples are collected from drift faces, backs and walls over widths of 1.5-2.0 metres, and muck piles are also sampled. Sampling of mineralization exposed in mine workings returned the following results:

Location Sample Type Number of Samples Length of Interval (m) Average % Cu Average % Zn
Selena Level 6 Wall 9 18.0 3.59 19.58
Selena Crosscut 6-964 Back 6 10.3 2.47 26.64
Rebeca Level 6 Back 4 5.5 8.68 21.16
Fernandez Extension Level 6.5 Back 5 14.1 2.74 10.38

The mineralized rock represented by the above samples has already been mined, blended with other mineralized rocks, and shipped to the Corporation's Malpaso mill for processing. The effect is shown by the 2009 pilot-mining production results, for which the Corporation processed 89,577 tonnes averaging 1.81% copper and 10.06% zinc (see press release of February 3, 2010).

The accompanying map shows the location of the various areas currently being mined, which are Guadalupe, Rebeca, San Francisco, Fernandez, Manto Gordo, San Angel, La Foto, Bismark and Rosario zones. By mining from various zones, the Corporation can blend mineralized rock to the optimal grades for the circuits at the Malpaso mill.
Dia Bras Exploration at PDAC, March 7-10, 2010
Dia Bras will have its booth at stand 3009 in Session A & B (Sunday through Wednesday, March 7-10). Rock samples from Bolivar and Cusi will be on display as well as maps and cross sections showing results of the Corporation's exploration at Bolivar, Cusi and its regional gold properties.

Method of analysis

Samples were prepared at the ALS Chemex lab facility in Chihuahua, Mexico, and analyzed by ICP and AA methods at their facilities in Vancouver, Canada. Diamond drill samples sent for analysis consisted of half NQ-size and BQ-size diamond core split on site, prepared by the 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.

Quality control

The quality assurance-quality control (QA-QC) of Dia Bras has been described in detail in both RPA's NI 43-101 reports of December, 2006, at Cusi and October, 2005, for Bolivar.

The technical content of this news release has been approved by Thomas L. Robyn, Ph.D., CPG, RPG, a Director of Dia Bras, a Qualified Person as defined in NI 43-101.

About Dia Bras

Dia Bras is a Canadian exploration mining corporation focused on precious and base metals in Chihuahua State and other areas of northern Mexico. The Corporation is committed to developing and adding value to its most advanced assets – the Bolivar copper-zinc project and the Cusi silver mining camp. The Corporation's shares trade on the TSX Venture Exchange under the symbol "DIB". 

For further information on Dia Bras Exploration Inc. visit www.diabras.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.

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.

Contact Information

  • Dia Bras Exploration Inc.
    Daniel Tellechea, President & CEO
    514-393-8875 ext. 241
    Dia Bras Exploration Inc.
    Karl J. Boltz
    Vice President, Corporate Development