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Sierra Metals Inc.

Publié le 30 septembre 2009

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

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Mots clés associés :   Canada | Copper | Dia Bras | G Mexico | Titanic | Zinc |

 

 

 

 

 

Dia Bras Exploration Inc.

TSX VENTURE:

DIB

 

 

 

 

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September 29, 2009

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 positive results of continued drilling and underground drifting programs at its Bolivar pilot mine, in Chihuahua State, Mexico. Of particular note is the ongoing mine development of the Guadalupe zone, where access drifts in three levels are delineating a high-grade massive copper-zinc sulfide zone with grades higher than previously anticipated.

The Guadalupe zone was first discovered with two drill hole intercepts in 2004 and mine development access in the area was intermittent as the Company was focusing on mining the Titanic and Selena zones in those years. Further drilling in early 2009 of the Guadalupe zone identified the larger extent of mineralization prompting further development efforts in the area. Mining began on Levels 3 & 7 during March 2009 and on Level 8 during May 2009. Commenting on the results, Daniel Tellechea President and CEO stated "The economic importance of this zone is increasing more-and-more as work progresses. Sampling of drifts and stopes demonstrates the high grade nature of the Guadalupe mineralization. The extent of the Guadalupe zone, however, has not been determined as it is still open in all directions. The results reported here also demonstrate the Company's ability to continue shipping high-grade rock to its 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:

 
--------------------------------------------------------------
                     From      To  True Width      Cu       Zn
Drill Hole             (m)     (m)         (m)      %        %
--------------------------------------------------------------
Surface Drill Holes
--------------------------------------------------------------
DB09B298             85.3    88.1         2.8    0.37     4.16
--------------------------------------------------------------
DB09B299            163.2   165.6         2.4    1.92    13.86
             incl.  164.8   165.6         0.8    5.67    40.34
                    176.4   183.4         6.7    2.68    30.02
--------------------------------------------------------------
DB09B302            149.6   151.4         1.8    6.12    44.93
                    158.4   162.2         3.3    6.01    42.85
--------------------------------------------------------------
DB09B308            204.2   206.4        1.65    0.18    11.00
                    210.4   210.9         0.5    0.02    11.35
--------------------------------------------------------------
Underground Drill Holes
--------------------------------------------------------------
DB09BM189(i)       116.70  121.15        4.45    4.71    34.16
--------------------------------------------------------------
DB09BM190(i)        75.85    80.3        4.45    2.74    38.16
--------------------------------------------------------------
DB09BM193          107.25  112..14        4.99    0.21     6.89
--------------------------------------------------------------
DB09BM218            28.1    33.5         5.4    0.43     8.27
--------------------------------------------------------------
DB09BM220            14.4    17.0         2.6     0.3    15.98
             incl.   14.4    15.3         0.9    0.78    30.07
--------------------------------------------------------------
(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:

 
-----------------------------------------------------
              Sample    Number of   Average   Average
Location        Type      Samples      % Cu      % Zn
-----------------------------------------------------
Reb. 3-842      Face            6      5.31     43.17
-----------------------------------------------------
                Back            2      4.25     33.50
-----------------------------------------------------
Fte. 3-818      Back            7      7.16     33.18
-----------------------------------------------------
Rbe. 3-831      Back            3      4.15     42.83
-----------------------------------------------------
                Back            4      4.56     25.35
-----------------------------------------------------
Rbe. 3-875      Muck           16      3.33     29.49
-----------------------------------------------------
Fte. 7-838      Face           14      4.80     33.04
-----------------------------------------------------
                Wall            2      7.60     32.11
-----------------------------------------------------
Rbe. 7-940      Back           32      0.51     12.34
-----------------------------------------------------
Fte. 8-925      Wall           15      0.09     13.64
-----------------------------------------------------
                Wall            8      0.08      8..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".

For further information on Dia Bras 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 release..

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

 

 

 

 



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Cours de l'or et de l'argent pour les pays mentionnés : Canada | Tous

Sierra Metals Inc.

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CODE : DIB.V
ISIN : CA25244F1099
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Sierra Metals est une société de production minière d'argent et de zinc basée au Canada.

Sierra Metals est productrice d'argent, de zinc, de cuivre, de fer, d'or et de plomb au Mexique, et détient divers projets d'exploration au Mexique.

Ses principaux projets en production sont BOLIVAR et CUSI au Mexique et ses principaux projets en exploration sont ARECHUYVO, MELCHOR OCAMPO, MALPASO MILL et BATOPILAS au Mexique.

Sierra Metals est cotée au Canada, aux Etats-Unis D'Amerique et en Allemagne. Sa capitalisation boursière aujourd'hui est 388,7 millions CA$ (357,5 millions US$, 262,4 millions €).

La valeur de son action a atteint son plus bas niveau récent le 19 décembre 2008 à 0,04 CA$, et son plus haut niveau récent le 11 mars 2011 à 3,92 CA$.

Sierra Metals possède 161 939 959 actions en circulation.

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