Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

September 30, 2009 09:03 ET

Dia Bras Develops Access to Massive High-Grade Copper-Zinc Mineralization at Bolivar

MONTREAL, QUEBEC--(Marketwire - Sept. 30, 2009) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report the results of continued drilling and underground drifting at its Bolivar pilot mine, Chihuahua State, Mexico. Of particular note is the ongoing development of the Guadalupe zone that was first encountered in two drill holes in 2004. Intermittent development of mineralization encountered by these holes began in early 2008 while the Company was concentrating on mining the Titanic and Selena zones. Further drilling in early 2009 resulted in recognition of the extent of mineralization at Guadalupe, which resulted in further development of the zone. Mining began on Levels 3 & 7 during March and on Level 8 during May. The importance of this zone is being recognized more-and-more as work progresses.

Sampling of drifts and stopes demonstrate the high grade nature of the Guadalupe mineralization. Although the extent of the Guadalupe zone has not been determined, it is open in all directions.

The results reported here demonstrate the Company's ability to ship high-grade rock to the Malpaso mill until the new mill is operational on site at the Bolivar mine.

The table below summarizes the significant drill results at Guadalupe zone:

Drill HoleFrom
(m)
To
(m)
True Width
(m)
Cu
%
Zn
%
Surface Drill Holes
DB09B29885.388.12.80.374.16
DB09B299163.2165.62.41.9213.86
incl.164.8165.60.85.6740.34
 176.4183.46.72.6830.02
DB09B302149.6151.41.86.1244.93
 158.4162.23.36.0142.85
DB09B308204.2206.41.650.1811.00
 210.4210.90.50.0211.35
Underground Drill Holes
DB09BM189(i)116.70121.154.454.7134.16
DB09BM190(i)75.8580.34.452.7438.16
DB09BM193107.25112.144.990.216.89
DB09BM21828.133.55.40.438.27
DB09BM22014.417.02.60.315.98
incl.14.415.30.90.7830.07
(i): Results published December 17, 2008

Guadalupe zone has been accessed on three levels, Levels 3, 7 & 8, where massive high-grade copper-zinc mineralization occurs. Samples are collected from drift faces, backs and walls over widths of 1.5-2.0 meters, and muck piles are also sampled. Sampling returned the following results:

LocationSample
Type
Number of
Samples
Average
% Cu
Average
% Zn
Reb. 3-842Face65.3143.17
 Back24.2533.50
Fte. 3-818Back77.1633.18
Rbe. 3-831Back34.1542.83
 Back44.5625.35
Rbe. 3-875Muck163.3329.49
Fte. 7-838Face144.8033.04
 Wall27.6032.11
Rbe. 7-940Back320.5112.34
Fte. 8-925Wall150.0913.64
 Wall80.088.44

The accompanying maps and sections show the locations of various drill holes and underground sites where sampling has been done.

Mining at Bolivar is currently being done from the following locations: Guadalupe, Rebeca, San Francisco, Fernandez, Manto Gordo, San Angel, La Foto, Bismark, Rosario and Increible zones. By mining from various zones, the Company can blend ore to the optimal grades for the circuits at the Malpaso mill. The third quarter production report, which will be released in October, will provide specific numbers for the grade of mill feed.

See Bolivar Mineralized Zones map, available at the following address: http://www.diabras.com/en/newscenter/2009/pr_09_30_Bolivar_Map1.pdf).

See Guadalupe Composite Cross Section, available at the following address: http://www.diabras.com/en/newscenter/2009/pr_09_30_Bolivar_Map2.pdf).

See Guadalupe Long Section – Foot Wall, available at the following address: http://www.diabras.com/en/newscenter/2009/pr_09_30_Bolivar_Map3.pdf).

See Guadalupe Long Section – Foot Hanging Wall, available at the following address: http://www.diabras.com/en/newscenter/2009/pr_09_30_Bolivar_Map4.pdf).

Method of Analysis

Samples were prepared at the 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 Chemex.

Quality Control

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 Thomas L. Robyn, Ph.D., CPG, RPG, Chairman of the Board of Dia Bras, a Qualified Person as defined in NI 43-101.

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 Corporation is committed to developing and adding value to its assets – the Bolivar copper-zinc project and the Cusi silver mining camp. The Corporation trades on the TSX Venture Exchange under the symbol "DIB".

Forward-looking statements

This news release contains certain statements that constitute forward-looking statements. Forward-looking information includes, but is not limited to, information concerning Dia Bras's 2009 guidance respecting pilot-mining production, and potential plans for Bolivar and Cusi projects.. Forward-looking statements are subject to a variety of risks and uncertainties, which could cause actual events or results to differ from those reflected in the forward-looking statements, including, without limitation, risks and uncertainties relating to foreign currency fluctuations; risks inherent in the mining industry including environmental hazards, industrial accidents, unusual or unexpected geological formations, ground control problems and flooding; risks associated with the estimation of mineral resources and the geology, grade and continuity of mineral deposits; the possibility that future exploration, development or mining results will not be consistent with the Company's expectations; the potential for and effects of labour disputes or other unanticipated difficulties or shortages of labour or interruptions in production; actual rocks mined varying from estimates of grade, tonnage, dilution and metallurgical and other characteristics; the inherent uncertainty of pilot-mining activities and cost estimates and the potential for unexpected costs and expenses, commodity price fluctuations; uncertain political and economic environments; changes in laws or policies, foreign taxation, delays or the inability to obtain necessary governmental permits; and other risks and uncertainties. Refer to "Risk and Uncertainties".

Forward-looking information is, in addition, based on various assumptions including, without limitation, the expectations and beliefs of management, the assumed long-term price of zinc, copper, lead and silver; the regulatory and governmental approvals for the Company's projects and other operations on a timely basis; access to financing, appropriate equipment and sufficient labour. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements. Although the forward-looking statements contained in this MD&A are based upon what management believes to be reasonable assumptions, the Company cannot guarantee that actual results will be consistent with these forward-looking statements. These forward-looking statements are made as of the date of this MD&A, and the Company does not assume any obligation to update or revise them to reflect new events or circumstances, except as required under applicable securities regulations.

Contact Information

  • Dia Bras Exploration
    Daniel Tellechea
    President & CEO
    514-393-8875

    or

    Dia Bras Exploration
    Thomas L. Robyn, Ph.D.
    Chairman
    514-393-8875
    www.diabras.com