Dia Bras Exploration Inc.
TSX VENTURE : DIB

Dia Bras Exploration Inc.

July 15, 2010 10:30 ET

Dia Bras Accelerates Advanced Development at CUSI

MONTRÉAL, QUÉBEC--(Marketwire - July 15, 2010)Dia Bras Exploration Inc. (TSX VENTURE:DIB) is pleased to report that advanced development at its Cusi silver project is being accelerated, with expanded drilling at the Promontorio mine and new drilling at the San Juan mine leading to mine planning. Both mines are being prepared for pilot-mining during early 2011 and drilling continues to yield high grades of silver from them. Production from the Santa Eduwiges mine is increasing month-by-month.

"These results are very encouraging," states Daniel Tellechea, President and CEO of Dia Bras. "We expect to mine from three mines simultaneously next year and therefore increase the amount of rock processed at our Malpaso Mill, which is only 36 km by good road from these mines. The high grades of silver encountered in each mine area indicate that our potential silver production over the next few years will increase significantly, especially when the other mines in the property are developed and mining commences."

Locations of drill holes reported here are for the Promontorio , Santa Eduwiges, and San Juan areas. Results from the three areas are shown in the tables below:

Promontorio Area

Hole ID* From (m) To(m) Interval (m) Est. True Width (m) Ag (g/t) Pb (%) Zn (%) Vein
286 142.30 145.50 3.20 2.88 361 0.34 0.38 L
288 137.30 138.60 1.30 1.10 600 0.30 1.34 El Gallo
291 128.70 130.00 1.30 1.18 232 0.14 0.22 El Gallo
294 146.90 149.90 3.00 2.49 394 0.74 0.35 El Gallo
Incl. 147.90 148.90 1.00 0.83 1,155 2.09 0.85  
295 128.13 128.73 0.60 0.55 1,035 0.12 0.37 El Gallo
296 137.85 139.90 2.05 1.87 381 0.19 0.27 El Gallo

* All holes have the prefix DC10B

Santa Eduwiges Area

Hole ID* From (m) To(m) Interval (m) Est. True Width (m) Ag (g/t) Pb (%) Zn (%) Vein
292 35.00 39.80 4.80 2.82 290 0.11 0.10 S. Antonio Alto
293 27.10 29.00 1.90 1.67 194 0.17 0.14 S. Antonio Alto
and 64.50 65.70 1.20 0.83 261 0.19 0.24 S. Antonio Alto
300 33.65 36.00 2.35 1.87 814 0.21 0.28 S. Marina Alto

* All holes have the prefix DC10B

San Juan Area

Production from Cusi as pilot-mining is expected to increase significantly with mining of the San Juan vein because of the width of the mineralized structure as exemplified by the intersection close to the level 2, where the vein has three components: hanging wall section, 2.24m @ 655 Ag g/t; middle section, 3.37m @ 177 Ag g/t; and foot wall section, 3.37 m @ 90 Ag g/t. These sections form a combined shoot of 8.98 metres true width, with an average grade of 264 Ag g/t (see the cross section along the vein).

Hole ID* From (m) To(m) Interval (m) Est. True Width (m) Ag (g/t) Pb (%) Zn (%) Vein
297 96.00 102.00 6.00 2.24 655 0.13 0.15 San Juan
Incl. 96.00 99.00 3.00 1.12 1,240 0.23 0.25  
302 49.55 53.00 3.45 2.23 314 0.04 0.06 San Juan
304 77.50 81.00 3.50 1.31 98 0.04 0.03 San Juan

* All holes have the prefix DC10B

Advanced Development

As recently reported in the Company´s News Release No. 24, on July 14, 2010, Cusi is under development with the intention of placing it into pilot-mining. Development activities are underway in Santa Eduwiges and Promontorio mines, while the Company is drilling at San Juan to move it to development and pilot-mining as well. Drilling that guided mine development at Santa Eduwiges during the first six months of 2010 has been successful, given that the Company's Malpaso Mill processed 12,267 tonnes of rock averaging 297 g/t silver and 0.65% lead – a significant improvement over the same period of 2009.

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 and 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 Company is committed to developing and adding value to its assets – the Bolivar Property and the Cusi Property. The Company´s shares trade 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.

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.

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.

Contact Information

  • Dia Bras Exploration Inc.
    Daniel Tellechea
    President & CEO
    1-866-493-9646
    or
    Dia Bras Exploration Inc.
    Karl J. Boltz
    Vice President, Corporate Development
    1-866-493-9646
    www.diabras.com