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Dia Bras Reports More Silver Drill Results and Its Mine Ramp Extension Reaches Silver Disseminated Zone at Its Promontorio Mine, Cusi Property

TSX Venture Exchange - DIB
Bolsa de Valores de Lima - DIB
# 38-2012

TORONTO, Nov. 29, 2012 /PRNewswire/ - Dia Bras Exploration Inc. (TSX-V:DIB) ("Dia Bras" or the "Company") is pleased to report that development of the ramp at the Promontorio Mine has reached the outer portion of the disseminated zone on Level 5 and is being extended to Level 6.  In addition, geologic mapping in the Company's core area of interest has been completed.

Press Release Highlights:

  • Extension of the ramp at Promontorio began during July, 2012 and the ramp has been advanced about 180 m since work began.  The disseminated zone was encountered in mid-October and sampling of development muck indicates that the outer portion of the disseminated zone has been penetrated. 
  • Geologic mapping at 1:5,000 scale has been completed over an area of 20 square kilometres, which covers the area from north of San Juan mine to south of the La India mine.  In addition, an area of 700 x 700 meters focused on the Promontorio mine area has been mapped at 1:1,000 scale. 
  • Five areas of potential open-pitable mineralization have been identified as a result of the new mapping.
  • Advanced development in portions of Promontorio and Santa Eduwiges mines is steadily producing more tonnage, with development rock being sent to the Malpaso mill and processed.

"Promontorio is contributing more and more tonnage to our pilot mining, as evidenced by the steady increase in production from zero in March to 1,353 tonnes being shipped to Malpaso during October." stated Daniel Tellechea, President and CEO of Dia Bras Exploration.  "As the ramp is extended to deeper levels more tonnage can be produced.  This will have a very positive effect on our ability to conduct our advanced development activities and move to commercial production after completion of our 43-101 report in early 2013."

DRILLING
During the period August-October, 2012, the Company drilled a total of 12,057 meters at the Cusi project.  A total of 10,774 m was drilled from the surface and 1,283 m underground.  For the period January-October, 2012, the Company has drilled a total of 31,366 m; 29,269 m from the surface and 2,066 m underground.

Assay results have been received for holes drilled during August and September, and significant results, those above the current cut-off grade of 100 g/t Ag, are shown in the tables below.  The full list of assays can be found at http://files.newswire.ca/1055/DiaBrasTableEnhanced.pdf.  A drill hole location map can be found at http://files.newswire.ca/1055/DiaBrasDrillHoleLoc.pdf.

Promontorio Mine

Hole
Number*
From-To (m) Core
Length (m)
Est. True
Width (m)
Area Au g/t Ag g/t Pb % Mn %
B516 123.45-124.10 0.65 0.22 Promontorio 0.210 139 0.10 0.91
and 131.70-132.45 0.75 0.37 " 0.160 874 1.29 0.56
and 171.45-171.90 0.45 0.22 " 0.399 1,950 0.52 3.00
and 254.10-255.80 1.70 0.58 " 0.480 168 0.90 1.16
and 257.6-262.80 5.20 2.98 " 1.240 296 1.23 3.95
and 264.45-267.45 3.00 1.93 " 0.600 212 2.54 2.58
and 296.35-297.30 0.95 0.32 " 0.680 173 0.25 3.51
B518 79.20-81.00 1.80 1.38 El Gallo 0.040 294 0.15 0.07
and 122.15-123.6 1.45 1.43 " 0.037 149 0.06 0.27
and 140.10-141.00 0.90 0.69 " 0.017 151 0.24 1.67
B519 176.50-178.00 1.50 1.23 Promontorio 0.010 133 0.45 0.53
and 203.50-204.20 0.70 0.61 " 0.592 296 2.21 0.53
B520 195.85-201.90 6.05 3.02 " 0.35 670 0.11 1.75
and 328.35-329.70 1.35 0.87 " 0.002 112 0.02 0.32
and 339.00-346.00 7.00 2.39 " 0.010 211 0.11 0.25
and 348.50-349.70 1.20 0.41 " 0.098 553 0.09 0.45
B521 38.20-40.85 2.65 1.70 " 0.000 140 0.13 0.46
and 44.80-46.30 1.50 1.30 " 0.010 583 0.10 2.31
and 52.35-54.15 1.80 1.56 " 0.11 1,783 0.46 2.19
and 59.85-60.45 0.60 0.42 " 0.014 115 0.13 0.88
and 65.50-65.85 0.35 0.30 " 0.006 287 0.28 0.74
and 68.50-69.00 0.50 0.38 " 0.096 229 0.10 0.08
and 76.35-77.15 0.80 0.61 " 0.002 136 0.26 0.87
and 113.80-114.3 050 0.25 " 0.331 1,240 0.60 0.54
and 134.7-135.10 0.40 0.28 " 0.055 151 0.09 1.45
and 158.60-158.90 0.30 0.15 " 0.026 104 0.07 1.65
B526 96.55-100.50 3.95 3.24 Cuerpo Or 0.021 137 0.04 0.08
B529 117.65-118.10 0.45 0.19 Promontorio 0.313 193 0.20 0.54
and 322.40-323.45 1.05 0.80 " 1.185 630 0.30 3.89
B531 59.95-61.45 1.50 1.15 Cuerpo Or 0.002 157 0.13 0.01
M123 6.50-7.20 0.70 0.49 Promontorio 0.000 221 0.04 0.40
and 18.90-19.20 0.30 0.15 " 0.400 2,150 0.60 5.95
and 23.40-27.40 3.00 1.72 " 0.000 111 0.09 0.81
and 35.20-39.00 3.80 2.91 " 0.090 483 0.10 1.27
and 44.75-47.45 2.70 1.74 " 0.000 241 0.11 0.36
and 62.75-63.90 1.15 0.57 " 0.000 990 0.39 0.77
and 71.20-71.70 0.50 0.25 " 0.000 196 0.11 0.29
and 74.50-76.00 1.50 0.96 " 0.080 1,182 0.66 2.18
and 78.00-78.50 0.50 0.38 " 0.000 178 0.73 0.59

* All holes have prefix DC12; prefix B = surface holes, M = underground holes
+ Cuerpo Oriente, formerly Veta del Contacto
nr = not reported

Santa Eduwiges Mine

Hole
Number*
From-To (m) Core
Length (m)
Est. True
Width (m)
Area Au g/t Ag g/t Pb % Mn %
B532 39.00-40.50 1.50 1.30 S. Bartolo 0.160 266 0.55 1.30
and 45.70-46.70 1.00 0.64 " 0.260 121 0.11 0.01
and 53.30-54.00 0.70 0.35 " 0.033 189 0.64 0.02
and 73.05-74.10 1.05 0.36 " 0.281 107 0.01 0.91
M122 1.30-1.70 0.40 0.33 S. Eduwiges 0.800 109 0.10 0.05
and 5.55-5.85 0.30 0.25 " 0.000 247 0.88 0.37
M124 5.50-5.80 0.30 0.26 S. Eduwiges nr 262 1.36 0.21
and 15.20-15.50 0.30 0.19 " 0.600 908 0.52 0.36
M125 66.20-68.19 2.00 1.97 S. Eduwiges 0.190 273 0.11 0.13
M127 5.80-6.25 0.45 0.42 S. Eduwiges nr 189 0.62 0.52
and 10.60-12.00 1.40 1.15 " nr 165 0.10 0.25
M128 6.60-7.10 0.50 0.29 S. Eduwiges 0.700 411 1.18 0.59
and 26.00-27.00 1.00 0.42 " 0.000 313 0.16 0.30

* All holes have prefix DC12; prefix B = surface holes, M = underground holes

MINE DEVELOPMENT

During the period August-October, 2012, the Malpaso mill processed 14,458 tonnes of development rock averaging 192 g/t silver and 0.59% lead.  During this period, 2,877 tonnes of development rock was shipped from the Promontorio mine and 8,620 tonnes from Santa Eduwiges mine.

Mine development continued in both the Santa Eduwiges and Promontorio mines, as described below:

Promontorio

Development continued on Levels 2, 4, 5 and 9, and the ramp reached Level 5 and is being extended to Level 6.  On Level 5, the ramp encountered the outer zone of the disseminated zone, cutting through silicified rhyodacite with a pale green tint (probably fine-grained sericite) that contains very fine-grained sulfides, pyrite and a black sulfide mineral.  The rock assayed at 25 g/t Ag, which is anomalous and indicates the ramp is on the fringe of the main disseminated zone.

Santa Eduwiges

Development of the Mexicana and San Bartolo veins continued on Levels 3, 7, 8.5, 10 and 11.  Stoping of the veins was done from Levels 7, 7.5 and 8.5.  Cross-cuts were developed on Level 10 and drifting was done along the Mexicana vein to intersect the Carta Blanca vein. The ramp was developed from Level 10 to Level 11 on the Mexicana vein.

GEOLOGIC MAPPING:

Detailed geologic mapping of the core Cusi area (San Juan to La India) has been completed at 1:5,000 scale and the main Promontorio area has been mapped at 1:1,000 scale.  Mapping shows five areas of interest, based on surface alteration, for open-pitable targets (http://files.newswire.ca/1055/Cusi(5000).pdf).  Listed in order of priority, the areas are: 1) Promontorio-Promontorio Viejo; 2) Nueva Santa Marina; 3) San Bartolo; 4) La India; and, 5) San Ignacio.  These areas occur where veins splay and flex, and are of moderate size, ranging in length from 200 to 400 m and widths of 80-200 m.  Rock chip sampling along lines across the widths of the Promontorio-Promontorio Viejo area is in progress, and the other areas will be sampled in order of priority.

The area of interest is underlain by Tertiary rhyodacite exhibiting various levels of alteration and veining.  Major veins have been traced over distances up to 3 km and there are three major directions of veining: NW, NE and N-S.  Veining and fracturing are more intense closer to the Cusi fault, such as the disseminated zone at the Promontorio mine.

Quality Control

The quality assurance-quality control (QA-QC) of Dia Bras has been described in detail in RPA's NI 43-101 report of December 2006 at Cusi.

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

About Dia Bras

Dia Bras is a Canadian and Peruvian listed (TSX-V: DIB, BVL: DIB) exploration and mining company focused on precious and base metals in Chihuahua State, other areas of northern Mexico, and most recently at its Yauricocha silver-lead-zinc-copper-gold mine in Peru. The Company is accelerating exploration at the Yauricocha property as well as pursuing the development and exploration of its most advanced Mexican assets - the Bolivar Property (copper-zinc-silver) and the Cusi Property (silver-lead) and is exploring in Mexico several precious metal targets such as La Sidra gold project at the Bolivar Property, Las Coloradas silver project at Melchor Ocampo (Zacatecas State), the Bacerac silver project (Sonora State), and the La Verde gold project at the Batopilas Property (Chihuahua State). Dia Bras is also exploring base metal projects in Mexico such as the Corralitos intrusion-hosted molybdenum deposit.

The Company's shares trade on the TSX Venture Exchange under the symbol "DIB" and on the Lima Exchange under the symbol "DIB".

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.

Complete list of assays for this press release:

Promontorio Mine

Hole
Number*
From-To (m) Core
Length (m)
Vein Au g/t Ag g/t Pb % Zn % Mn %
B516 123.45-124.10 0.65 Promontorio 0.210 139 0.10 0.21 0.91
and 131.70-132.45 0.75 " 0.160 874 1.29 2.52 0.56
and 171.45-171.90 0.45 " 0.399 1,950 0.52 1.20 3.00
and 214.95-215.30 0.35 " 0.008 79 0.07 0.20 0.51
and 248.65-249.15 0.50 " 0.217 92 0.22 0.51 2.91
and 254.10-255.80 1.70 " 0.480 168 0.90 1.63 1.16
and 257.6-262.80 5.20 " 1.240 296 1.23 1.48 3.95
and 264.45-267.45 3.00 " 0.600 212 2.54 2.29 2.58
and 281.60-283.55 1.95 " 0.130 67 0.17 0.24 1.11
and 296.35-297.30 0.95 " 0.680 173 0.25 0.40 3.51
and 298.80-299.40 0.60 " 0.240 60 0.18 0.38 0.50
and 347.90-349.00 1.10 " 0.023 81 0.17 0.38 1.58
and 381.85-382.40 0.55 " 0.086 84 0.36 0.49 0.76
B517 342.25-342.60 0.35 " 0.061 83 0.03 0.45 0.89
and 343.50-344.00 0.50 " 0.061 78 0.15 0.26 0.53
B518 79.20-81.00 1.80 El Gallo 0.040 294 0.15 0.32 0.07
and 122.15-123.6 1.45 " 0.037 149 0.06 0.07 0.27
and 140.10-141.00 0.90 " 0.017 151 0.24 0.78 1.67
B519 176.50-178.00 1.50 Promontorio 0.010 133 0.45 0.18 0.53
and 203.50-204.20 0.70 " 0.592 296 2.21 3.94 0.53
B520 183.00-184.30 1.30 Promontorio 0.008 65 0.05 0.09 0.11
and 195.85-201.90 6.05 " 0.35 670 0.11 0.12 1.75
and 315.70-323.70 8.00 " 0.040 93 0.06 0.09 0.73
and 328.35-329.70 1.35 " 0.002 112 0.02 0.05 0.32
and 339.00-346.00 7.00 " 0.010 211 0.11 0.17 0.25
and 347.00-347.30 0.30 " 0.036 98 0.14 0.13 1.60
and 348.50-349.70 1.20 " 0.098 553 0.09 0.16 0.45
B521 26.30-32.70 6.40 Promontorio 0.010 70 0.17 0.45 1.05
and 38.20-40.85 2.65 " 0.000 140 0.13 0.24 0.46
and 44.80-46.30 1.50 " 0.010 583 0.10 0.13 2.31
and 52.35-54.15 1.80 " 0.11 1,783 0.46 0.58 2.19
and 59.85-60.45 0.60 " 0.014 115 0.13 0.13 0.88
and 65.50-65.85 0.35 " 0.006 287 0.28 0.27 0.74
and 68.50-69.00 0.50 " 0.096 229 0.10 0.46 0.08
and 76.35-77.15 0.80 " 0.002 136 0.26 0.45 0.87
and 113.80-114.3 050 " 0.331 1,240 0.60 0.70 0.54
and 116.00-116.80 0.80 " 0.006 67 0.04 0.09 0.40
and 134.7-135.10 0.40 " 0.055 151 0.09 0.24 1.45
and 155.15-155.45 0.30 " 0.009 72 0.04 0.07 0.45
and 158.60-158.90 0.30 " 0.026 104 0.07 0.33 1.65
B523 90.30-91.00 0.70 El Gallo 0.163 73 0.54 2.07 0.96
B524 138.05-138.40 0.35 Cuerpo Or+ 0.045 77 0.08 0.09 1.32
B526 86.80-88.30 1.50 Cuerpo Or 0.008 92 0.02 0.04 0.80
and 96.55-100.50 3.95 " 0.021 137 0.04 0.04 0.08
B529 117.65-118.10 0.45 Promontorio 0.313 193 0.20 0.17 0.54
and 250.60-252.50 1.90 " 0.110 95 0.26 0.53 1.42
and 322.40-323.45 1.05 " 1.185 630 0.30 0.45 3.89
B531 41.30-42.60 1.30 Cuerpo Or 0.008 64 0.25 0.02 1.01
and 50.80-52.40 1.60 " 0.005 69 0.11 0.14 0.01
and 59.95-61.45 1.50 " 0.002 157 0.13 0.36 0.01
M121 34.50-36.00 1.50 Promontorio nr** 97 0.10 0.18 nr
M123 6.50-7.20 0.70 Promontorio 0.000 221 0.04 0.06 0.40
and 11.50-12.70 1.20 " 0.000 73 0.10 0.10 0.04
and 18.90-19.20 0.30 " 0.400 2,150 0.60 1.94 5.95
and 23.40-27.40 3.00 " 0.000 111 0.09 0.12 0.81
and 35.20-39.00 3.80 " 0.090 483 0.10 0.10 1.27
and 44.75-47.45 2.70 " 0.000 241 0.11 0.16 0.36
and 62.75-63.90 1.15 " 0.000 990 0.39 0.18 0.77
and 71.20-71.70 0.50 " 0.000 196 0.11 0.12 0.29
and 74.50-76.00 1.50 " 0.080 1,182 0.66 0.89 2.18
and 78.00-78.50 0.50 " 0.000 178 0.73 0.62 0.59
and 79.60-81.00 1.40 " 0.000 73 0.08 0.30 0.22
M130 4.00-9.00 5.00 Promontorio 0.000 64 0.08 0.12 0.32
and 10.10-11.30 1.20 " nr 93 0.04 0.09 0.31

* All holes have prefix DC12; prefix B = surface holes, M = underground holes
+ Cuerpo Oriente, formerly Veta dell Contacto
nr = not reported

Santa Eduwiges Mine

Hole
Number*
From-To (m) Core
Length (m)
Vein Au g/t Ag g/t Pb % Zn % Mn %
B525 164.90-166.25 1.35 S. Eduwiges 0.214 95 0.01 0.01 0.34
B527 11.05-12.75 1.70 C. Blanca 0.129 65 0.29 0.19 0.26
B532 39.00-40.50 1.50 S. Bartolo 0.160 266 0.55 0.65 1.30
and 45.70-46.70 1.00 " 0.260 121 0.11 0.26 0.01
and 53.30-54.00 0.70 " 0.033 189 0.64 1.54 0.02
and 73.05-74.10 1.05 " 0.281 107 0.01 0.05 0.91
M122 1.30-1.70 0.40 S. Eduwiges 0.800 109 0.10 6.57 0.05
and 5.55-5.85 0.30 " 0.000 247 0.88 1.89 0.37
and 32.75-33.05 0.30 " 0.000 64 0.15 0.29 0.32
M124 5.50-5.80 0.30 S. Eduwiges nr 262 1.36 2.32 0.21
and 15.20-15.50 0.30 " 0.600 908 0.52 0.26 0.36
M125 23.25-24.10 0.85 S. Eduwiges nr 64 0.11 0.26 0.27
and 66.20-68.19 1.90 " 0.190 273 0.11 0.27 0.13
and 77.90-78.20 0.30 " nr 66 0.27 1.66 0.14
M126 49.10-58.00 8.90 S. Eduwiges 0.000 65 0.20 0.37 0.54
M127 5.80-6.25 0.45 S. Eduwiges nr 189 0.62 1.35 0.52
and 7.50-7.80 3.00 " nr 81 0.11 0.12 0.48
and 10.60-12.00 1.40 " nr 165 0.10 0.26 0.25
M128 2.60-3.05 0.45 S. Eduwiges nr 99 2.56 7.95 1.26
and 6.60-7.10 0.50 " 0.700 411 1.18 1.94 0.59
and 26.00-27.00 1.00 " 0.000 313 0.16 0.53 0.30
and 31.75-34.80 3.05 " 0.000 93 0.21 0.14 0.63

* All holes have prefix DC12; prefix B = surface holes, M = underground holes

 

 

 

 

SOURCE Dia Bras Exploration Inc.

PDF available at: http://stream1.newswire.ca/media/2012/11/29/20121129_C4618_DOC_EN_21340.pdf

PDF available at: http://stream1.newswire.ca/media/2012/11/29/20121129_C4618_DOC_EN_21341.pdf

PDF available at: http://stream1.newswire.ca/media/2012/11/29/20121129_C4618_DOC_EN_21370.pdf

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