TSX Venture Exchange - DIB
Bolsa de Valores de Lima - DIB
No. 17-2012
TORONTO, May 14, 2012 /CNW/ - Dia Bras Exploration Inc. (TSX-V:DIB) ("Dia Bras" or the "Company") is pleased to report that continued
surface and underground drilling at its Promontorio mine (Figure 1:
Cusi Project Map View) has expanded the Promontorio disseminated silver
deposit and the El Gallo veins while development work on Level 9 of
Promontorio mine has encountered good grades of silver in the
disseminated zone. Additionally, drilling at Santa Eduwiges has cut
several new zones of high grade silver mineralization.
Press Release Highlights:
-
Promontorio disseminated silver zone expanded 40 m upwards:
-
Drill hole DC12M108 cut 20.8 m width averaging 133.3 g/t silver on Level
5.
-
Development drifting on Level 9 of Promontorio mine has encountered good
grade silver within the disseminated zone in the fractured and
silicified zone at the intersection of the Promontorio main vein and an
intercepting vein; for example, a 7.3 m width averaging 190.9 g/t Ag.
-
Drilling identifies an extension of the El Gallo Back vein to only 6
meters below surface with a 7.8 meter intercept of 227 g/T Ag in the
Promontorio area
-
San Bartolo vein at Santa Eduwiges mine returned 5.05 m averaging 568.1
g/t Ag, 1.4 g/t Au, 3.2% Pb, 1.5% Zn and 0.8% Mn.
|
"These and previous results demonstrate the exceptional silver
exploration potential of the Cusi property." stated Daniel Tellechea, President and CEO of Dia Bras Exploration. "These results provide the basis to accelerate our exploration program
with the objective of defining additional resources for the future and
commissioning an updated 43-101 compliant resource at the end of this
year."
The Company has completed thirteen new drill holes in the past six
weeks. These holes are part of the Company's continuing program
directed at expanding the resources of the Cusi property and providing
data for mine planning for the pilot mining program.
Figure 1: Cusi Project Map View
Significant results from the thirteen holes are presented in "Table 1:
Summary of Cusi Drill Results", below:
Table 1: Summary of Cusi Drill Results
|
Hole Number
|
From (m)
|
To (m)
|
Core
Length (m)
|
Au g/t
|
Ag g/t
|
Pb %
|
Zn %
|
Mn %
|
Vein
|
|
DC12M108*
|
45.2
|
66.0
|
20.8
|
nd**
|
133.3
|
0.08
|
0.13
|
0.55
|
Pr. Dissem.
|
|
Incl.
|
45.2
|
48.8
|
3.6
|
nd**
|
273.4
|
0.11
|
0.39
|
0.27
|
Pr. Dissem.
|
|
DC12M111*
|
21.05
|
23.45
|
3.6
|
nd**
|
447.9
|
0.25
|
0.72
|
1.20
|
Pr. Dissem.
|
|
DC12B441
|
152.90
|
156.75
|
3.85
|
nd**
|
151.3
|
0.52
|
0.89
|
011
|
San Bartolo
|
|
and
|
188.05
|
193.10
|
5.05
|
1.400
|
568.1
|
3.20
|
1.50
|
0.80
|
"
|
|
DC12B444
|
168.8
|
170.0
|
1.2
|
0.137
|
170.0
|
0.23
|
0.72
|
0.50
|
"
|
|
|
178.4
|
181.65
|
3.25
|
0.100
|
114.3
|
0.70
|
0.90
|
0.10
|
"
|
|
DC12B445
|
6.0
|
13.85
|
7.85
|
0.100
|
227.6
|
0.20
|
0.00
|
0.10
|
El Gallo
|
|
|
69.7
|
71.5
|
1.8
|
0.500
|
452.7
|
0.20
|
1.20
|
0.00
|
"
|
|
DC12B446
|
134.8
|
136.2
|
1.4
|
1.800
|
478.4
|
0.40
|
0.20
|
0.05
|
San Bartolo
|
|
and
|
148.7
|
151.7
|
3.0
|
0.700
|
278.0
|
0.30
|
0.30
|
1.10
|
"
|
|
DC12B447
|
10.2
|
18.0
|
7.8
|
0.100
|
213.8
|
0.10
|
0.05
|
?
|
El Gallo
|
|
and
|
52.8
|
54.0
|
1.2
|
0.103
|
155.0
|
0.15
|
0.08
|
0.16
|
"
|
|
and
|
60.6
|
63.0
|
2.4
|
0.08
|
116.2
|
0.10
|
0.09
|
0.02
|
"
|
|
and
|
75.0
|
78.0
|
3.0
|
0.105
|
123.0
|
0.04
|
0.15
|
0.08
|
"
|
|
DC12B448
|
172.55
|
175.70
|
3.15
|
0.200
|
112.2
|
0.40
|
0.20
|
0.20
|
San Bartolo
|
|
and
|
186.0
|
187.45
|
1.45
|
0.800
|
519.7
|
0.50
|
1.10
|
0.30
|
"
|
|
and
|
191.7
|
198.6
|
6.9
|
0.200
|
178.6
|
3.10
|
2.40
|
0.40
|
"
|
|
DC12B449
|
66.1
|
67.3
|
1.2
|
0.361
|
1280
|
1.53
|
1.44
|
0.01
|
San Antonio
|
|
and
|
95.65
|
101.25
|
5.60
|
0.000
|
123.1
|
0.50
|
1.12
|
0.46
|
"
|
|
Incl.
|
95.65
|
96.90
|
1.25
|
0.010
|
482.9
|
0.68
|
2.92
|
0.44
|
"
|
|
and
|
109.25
|
110.15
|
0.90
|
0.100
|
382.0
|
1.60
|
2.90
|
0.10
|
"
|
|
DC12B453
|
12.3
|
12.9
|
0.6
|
0.059
|
173.0
|
0.03
|
0.01
|
0.03
|
El Gallo
|
|
and
|
48.6
|
49.5
|
0.9
|
0.017
|
140.0
|
0.07
|
0.03
|
0.43
|
"
|
|
and
|
61.8
|
63.4
|
1.6
|
0.050
|
158.5
|
0.10
|
0.00
|
0.02
|
"
|
|
DC12B456
|
78.0
|
78.9
|
0.9
|
0.107
|
152.0
|
0.83
|
0.98
|
1.49
|
San Antonio
|
|
and
|
102.75
|
103.4
|
0.65
|
0.055
|
379.0
|
0.26
|
0.20
|
0.47
|
"
|
|
and
|
105.8
|
106.2
|
0.4
|
0.300
|
122.0
|
0.27
|
0.50
|
0.44
|
"
|
|
and
|
122.40
|
123.35
|
0.95
|
0.303
|
318.0
|
0.41
|
0.47
|
1.82
|
"
|
|
and
|
136.75
|
137.2
|
0.45
|
0.239
|
589.0
|
0.70
|
0.32
|
0.12
|
"
|
|
and
|
141.1
|
141.6
|
0.5
|
0.093
|
257.9
|
0.673
|
3.36
|
0.208
|
"
|
* Underground hole drilled from Level 5 of Promontorio mine
** nd = not determined
Significance of Results:
Promontorio Mine: As shown in Figure 2, drill hole DC12M108 intercepted disseminated
silver mineralization on Level 5, which is about 40 m above the
previous intercept between Levels 6 & 7. This result shows that the
disseminated zone is still open in all directions. The Company's
geologists infer that the zone could continue for at least 200 m in a
NW-SE direction because of the multiple intersections of the
Promontorio mine veins with the Cusi fault along this distance. These
intersections provided the fractures and open spaces needed for
mineralizing solutions to seep into the host rhyodacite to form the
disseminated zone.
The high grades of silver encountered in the development work on Level 9
of the Promontorio mine (Figure 3) reinforces the Company's view that
wide zones of potentially-economic silver mineralization occur where
the Promontorio main vein (Veta A) is intersected by the "alphabet"
veins, such as Veins C, H, K, etc. Vein A (also called the Promontorio
vein or main vein) strikes NE and dips steeply NW. Several other veins
(the alphabet veins) strike in the same direction, but dip steeply in
the opposite direction (SE) such that extensive fracture and stockwork
breccia zones occur at the intersections of the veins. This
relationship was announced by the Company in 2007 when it obtained
historical sampling data from Level 7 of the mine where the H vein
intersects Vein A (press release of May 8, 2007). Drill hole
DC07B101-B (also shown on Figure 2) was drilled to confirm these data
and returned 9.0 m averaging 1,651 g/t Ag (press release of June 19,
2007), which illustrated the veracity of the historical data.
The zone is best illustrated by the samples 2960-2967 that were taken
across the strike of the fractured zone. These eight samples cover a
sample length of 7.3 meters and average 190.9 g/t Ag, 0.08% Pb, 0.35%
Zn and 0.38% Mn, again illustrating the low levels of base metals in
this area of the Promontorio mine. The Company's geologists infer that
the upper levels of the Promontorio mine are in the very upper portions
of the precious metals zone, which indicates that almost the entire
zone occurs in the mine area. This has significant positive
implications for the exploration and development potential for the
Promontorio mine area.
These results from drilling and development work emphasize the
importance of the Company's plan to increase exploration and mine
development activities at the Promontorio mine. Accelerated
underground development will bring forward the timing of increased
output from the mine and increase silver production, and in-fill
drilling will provide guidance for mine planning towards that goal.
Figure 2: Promontorio Cross Section showing DC12M108
Figure 3: Sampling Plan on Level 9, Promontorio Mine
El Gallo: Drilling in this area continues to demonstrate the down-dip continuity
of the El Gallo and El Gallo back veins (Figure 4). The data from
drilling are also allowing better projection of the orientation of the
veins and the Company's geologists are targeting the zone of
intersection of these two veins, which is due to their different
strikes. The intersection is to the northeast of the view in Figure 4
and is an area that has been the site of historical mining. The mined
area, however, is limited to the upper portions of the intersection and
the down-dip projection of the intersection is now better understood
and will be the target of future drilling. The veins are also open to
depth, as shown in Figure 4.
Figure 4: Cross Section of El Gallo Target
Santa Eduwiges Mine: The multiple intercepts in the Santa Eduwiges area (San Bartolo and San
Antonio veins) illustrate the abundance of veinlets that occur in the
area. When the veinlets converge or blow out to wider veins, these
areas become mineable, as for example the San Bartolo area where the
Company is mining at Levels 8 and 10. As additional drill data are
obtained, the structures controlling the veins are better understood
and this knowledge increases the success of the drilling, as shown by
these results in that every hole that was drilled in the Santa Eduwiges
area in this recent program has penetrated veinlets with high grades of
silver.
Method of Analysis
Samples from the surface drill holes 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 analyzed by
Induction Coupled Plasma (ICP) at ALS Chemex.
Samples from underground drill holes were prepared at the Company's lab
facility at its Malpaso lab and analyzed by atomic absorption for Cu,
Zn, Pb, Bi, Co, Mn, Sb, Cd and Fe. Gold and silver are analyzed by
fire assay method. Diamond drill samples sent for analysis consisted of
half NQ-size and BQ-size diamond core split on site. The Malpaso
laboratory follows the quality control methodology recommended by
CANMET of Canada, such as assaying of blanks, duplicate samples, and
check assays by commercial laboratories such as Chemex.
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 Exploration is a Canadian exploration & 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 (Chihuahua State).
The Company's shares trade on the Bolsa de Valores de Lime and TSX
Venture 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.
PDF available at: http://stream1.newswire.ca/media/2012/05/14/20120514_C6817_DOC_EN_13651.pdf
PDF available at: http://stream1.newswire.ca/media/2012/05/14/20120514_C6817_DOC_EN_13652.pdf
PDF available at: http://stream1.newswire.ca/media/2012/05/14/20120514_C6817_DOC_EN_13653.pdf
PDF available at: http://stream1.newswire.ca/media/2012/05/14/20120514_C6817_DOC_EN_13654.pdf
For further information on Dia Bras Exploration Inc. visit www.diabras.com or contact: