Dia Bras Extends Mineralized Zones at Bolivar Mine

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Dia Bras Extends Mineralized Zones at Bolivar Mine

By: Marketwire .

Sep. 29, 2006 02:06 PM

MONTREAL, QUEBEC -- (MARKET WIRE) -- 09/29/06 -- Dia Bras Exploration Inc. ("Dia Bras" and or the "Company")(TSX VENTURE: DIB) is pleased to report recent results for its ongoing development and pilot-mining program at its Bolivar property in the State of Chihuahua, Mexico.

Development of the Bolivar pilot mine has continued, with two ramps driven to access mineralized rock located by the Company's underground drilling program. A ramp has been driven from Level 1 to Level 2 to access the down-dip extension of the Breccia Linda zone, and a ramp has been driven from Level 6 to Level 7 to access the downward extensions of the Rosario and Fernandez zones. The drill results that caused the Company to initiate ramp development are:


Drill Hole    From        To     Length         Cu    Zn    Au     Ag
                 m         m          m          %     %   g/t    g/t
---------------------------------------------------------------------
                           Underground Drill Holes
---------------------------------------------------------------------
DB06BM026      3.0       4.5        1.5       0.30  4.06   0.0    2.3
(Manto Gordo,  4.5       6.0        1.5       1.51  8.16   0.0   10.2
 Level 1)      6.0       7.5        1.5       0.33  4.59   0.0    2.7
               7.5       9.0        1.5       0.18  7.66   0.0    2.2
             Total & Average        6.0       0.58  6.12   0.0    4.3
              27.6      28.5        0.9       0.40  4.00   0.0   14.2
              28.5      30.0        1.5       1.48  16.2   0.0   15.8
              30.0      31.5        1.5       0.89  7.04   0.0    5.8
              31.5      32.3        0.8       0.06  0.49   0.0    7.8
             Total & Average        4.7       0.85  8.27   0.0   10.9
---------------------------------------------------------------------
DB06BM024     31.5      33.0        1.5       0.15  3.35   0.0    2.3
(La Foto,     33.0      34.5        1.5       1.22 20.20   0.0    7.2
Level 2)      34.5      36.0        1.5       0.10  2.68   0.0    1.6
             Total & Average        4.5       0.49  8.74   0.0    3.7
---------------------------------------------------------------------
DB06BM027     46.0      47.5        1.5       0.61  3.73   0.0    7.9
(Rosario,     47.5      49.0        1.5       1.58  7.14   0.1   38.7
below         49.0      50.5        1.5       0.34  3.85   0.0   12.7
Level 6)      50.5      51.8        1.3       0.20  6.34   0.0    6.9
             Total & Average        5.8       0.70  5.23   0.0   16.9
---------------------------------------------------------------------
DB06BM028     13.0      14.5        1.5       0.18 13.40   0.0   15.0
(Rosario,     14.5      16.0        1.5       3.34 27.10   0.1   38.3
below         16.0      17.5        1.5       0.20  4.67   0.0    3.5
Level 6)      17.5      19.1        1.6       4.77 28.60   0.1   42.0
             Total & Average        6.1       2.17 18.61   0.0   25.0
---------------------------------------------------------------------
DB06BM029     27.0      28.5        1.5       0.28  2.70   0.0    5.1
(Rosario,     28.5      29.4        0.9       0.20 20.40   0.0    4.2
below
 Level 6)    Total & Average        2.4       0.25  9.15   0.0    4.8
---------------------------------------------------------------------
DB06BM030     50.2      51.0        0.8       0.44 16.55  0.09   24.9
(Rosario,     54.0      55.5        1.5       0.48  2.92   0.0    6.8
below         55.5      58.3        2.8       0.28  4.18   0.1   17.4
Level 6)     Total & Average        4.3       0.35  3.74   0.1   13.7
---------------------------------------------------------------------
DB06BM031     10.0      11.0        1.0       1.77  29.4  0.10   21.7
Rosario,     126.6     127.5        0.9       0.97 12.60  0.10   35.1
below        127.5     129.3        1.8       1.03  7.42  0.10   39.9
Level 6)     Total & Average        2.7       0.35  3.74   0.1   13.7
---------------------------------------------------------------------
                              Surface Drill Holes
---------------------------------------------------------------------
DB04B058     149.0     150.0        1.0        0.0  2.50   0.0    1.4
(Fernandez,  150.0     151.0        1.0       0.10  8.70   0.0    6.3
below        151.0     152.0        1.0      10.30  7.30   0.0   42.0
 Level 6)    152.0     153.0        1.0       0.70  12.0   0.0    3.8
             Total & Average        4.0       2.79  7.63   0.0   13.4
             159.0     160.0        1.0       3.07 12.55   0.0   40.3
             160.0     161.0        1.0       2.09 18.40   0.0   25.0
             161.0     162.0        1.0       3.58 16.55   0.0   34.5
             Total & Average        3.0       2.91 15.83   0.0   33.3
---------------------------------------------------------------------
DB04B067     159.0     160.0        1.0       4.00 18.45   0.0   19.3
(Fernandez,  160.0     161.0        1.0       0.00  1.40   0.0    0.2
below        161.0     162.0        1.0       0.00  0.31   0.0    0.3
Level 6)     162.0     163.0        1.0       1.10  0.83   0.3   19.8
             Total & Average        4.0       1.28  4.93   0.1    9.9
             210.0     211.0        1.0       4.49 16.50   4.7  112.0
             211.0     212.0        1.0       0.12  1.19   0.0    7.5
             212.0     213.0        1.0       0.17  1.47   0.1   16.9
             Total & Average        3.0       1.59  6.39   1.6   45.5
---------------------------------------------------------------------
DB06B159(i)   83.0      86.0        3.0       0.12  3.39   0.3    2.5
(Rosario,     86.0      89.0        3.0       0.20  6.89   0.1    5.0
under         89.0      92.0        3.0       0.10 12.20   0.6    5.3
Level 6)      92.0      93.0        1.0       0.00  0.00   0.0    0.0
              93.0      94.0        1.0       0.75 21.00  0.05   12.2
             Total & Average       11.0       0.18  8.04  0.05    4.6
             101.0     104.0        3.0       0.03  2.99   0.0    2.9
             104.0     107.0        3.0       0.01  7.73   0.0    1.3
             107.0     108.3        1.3       0.03  0.84   0.0    0.5
             108.3     109.3        1.0       1.00 23.40   0.4   66.7
             109.3     110.3        1.0       0.73 22.20   0.4   29.2
             110.3     111.3        1.0       1.77 greater
                                                    than
                                                   30.00   0.5   43.5
             Total & Average       10.3       0.36 greater
                                                    than
                                                   10.57   0.1   14.8
---------------------------------------------------------------------
DB06B168(i)   83.0      84.5        1.5       6.21  0.29   0.4  100.0
(Rosario,     84.5      86.0        1.5       1.08  3.64   0.1   64.2
under         86.0      87.5        1.5       0.41 10.35   0.0   19.3
Level 6)     Total & Average        4.5       2.57  4.76   0.2   61.2
              91.0      92.0        1.0       0.37 13.00   0.4   10.2
              92.0      93.0        1.0       0.95 16.80   0.1   16.0
             Total & Average        2.0       0.66 14.90   0.0   13.1
              95.0      96.0        1.0       0.54  9.08   0.0   12.6
              96.0      97.0        1.0       0.19  4.46   0.0    7.0
             Total & Average        2.0       0.37  6.77   0.0    9.8
             126.5     128.0        1.5       1.43  0.00   0.1   39.6
             128.0     131.0        3.0       1.14  3.19   0.0   16.8
             Total & Average        4.5       1.24  2.13   0.1   24.4
             134.0     135.5        1.5       0.63 15.25   0.1   14.6
             135.5     137.0        1.5       0.11 15.25   0.0    4.5
             137.0     138.5        1.5       0.33  7.31   0.0    7.0
             138.5     140.0        1.5       0.09  5.08   0.0    2.1
             140.0     141.5        1.5       0.11  5.80   0.0    2.7
             141.5     143.0        1.5       0.05  2.53   0.0    2.3
             143.0     144.5        1.5       0.07  3.68   0.0    3.4
             Total & Average       10.5       0.20  7.84   0.0    5.2
             144.5     146.0        1.5       0.05  0.51   0.0    2.3
             146.0     147.5        1.5       0.51  0.08   0.1   15.2
             147.5     149.0        1.5       0.32  0.01   0.1   12.5
             149.0     150.5        1.5       0.55  0.05   0.0    7.0
             150.5     152.0        1.5       0.87  0.02   0.2   25.5
             152.0     153.5        1.5       0.19  0.02   0.0   17.9
             153.5     155.0        1.5       2.08  1.74   0.0   39.8
             155.0     156.5        1.5       0.75  4.04   0.0   16.2
             156.5     158.0        1.5       0.27  3.54   0.0    6.5
             158.0     159.5        1.5       0.72  2.23   0.0   13.9
             Total & Average       15.0       0.63  1.22   0.1   15.7
---------------------------------------------------------------------
DB06B170      14.5      16.0        1.5       0.21  3.65   0.0    5.5
(Calixtro     16.0      19.0        3.0       0.23  2.27   0.0    4.6
manto, 5      19.0      22.0        3.0       0.19  3.34   0.0    6.4
meters below Total & Average        7.5       0.21  2.97   0.0    5.4
surface)
---------------------------------------------------------------------
DB06B171       8.0      10.0        2.0      11.10 14.50   0.1   62.4
(Calixtro     14.0      15.9        1.9       0.63  2.71   0.0    4.1
manto, 5      15.9      17.0        1.1       0.68  1.92   0.0    2.7
meters below  17.0      20.0        3.0       0.74  2.88   0.0    3.2
surface)     Total & Average        6.0       0.69  2.64   0.0    3.4
---------------------------------------------------------------------
DB06B172      15.0      16.0        1.0       2.25  7.03   0.0   22.2



(Calixtro     16.0      17.0        1.0       3.19 12.10   0.0   39.6
manto, 5     Total & Average        2.0       2.72  9.57   0.0   30.9
meters below
surface)
---------------------------------------------------------------------
(i) Results have been released previously

In addition to the assays given above, certain holes were assayed for iron content where high magnetite levels occur, which indicates the presence of the South Bolivar iron-copper-gold-silver skarn below the present mine workings. The importance of these intercepts is that it demonstrates that the South Bolivar skarn has an extension of over 800 meters along a SE-NW trend, from El Gallo to beneath the Bolivar mine. The Fe-Cu-Zn results from the South Bolivar under Level 6 are:


---------------------------------------------------------------------
Drill Hole      From             To Length     Cu        Zn       Fe
                   m              m      m      %          %       %
---------------------------------------------------------------------
DB06B159(i)     83.0           86.0    3.0   0.12       3.39   10.60
(Rosario,       86.0           89.0    3.0   0.20       6.89   11.95
under Level 6)  89.0           92.0    3.0   0.10      12.20    9.39
                92.0           93.0    1.0   0.00       0.00    0.00
                93.0           94.0    1.0   0.75      21.00    3.19
                    Total & Average   11.0   0.18       8.04    9.00
               101.0          104.0    3.0   0.03       2.99    0.76
               104.0          107.0    3.0   0.01       7.73    1.52
               107.0          108.3    1.3   0.03       0.84    0.63
               108.3          109.3    1.0   1.00      23.40    2.72
               109.3          110.3    1.0   0.73      22.20    3.45
               110.3          111.3    1.0   1.77      greater
                                                        than
                                                       30.00    4.66
                    Total & Average   10.3   0.36      greater
                                                        than
                                                       10.57    1.80
---------------------------------------------------------------------
DB06B168(i)     83.0           84.5    1.5   6.21       0.29   17.80
(Rosario,       84.5           86.0    1.5   1.08       3.64   13.20
under Level 6)  86.0           87.5    1.5   0.41      10.35   11.15
                    Total & Average    4.5   2.57       4.76   14.05
                91.0           92.0    1.0   0.37      13.00    9.90
                92.0           93.0    1.0   0.95      16.80    9.70
                    Total & Average    2.0   0.66      14.90    9.80
                95.0           96.0    1.0   0.54       9.08   11.45
                96.0           97.0    1.0   0.19       4.46   15.80
                    Total & Average    2.0   0.37       6.77   13.63
               126.5          128.0    1.5   1.43       0.00   10.50
               128.0          131.0    3.0   1.14       3.19   16.80
                    Total & Average    4.5   1.24       2.13   14.70
               134.0          135.5    1.5   0.63      15.25   16.50
               135.5          137.0    1.5   0.11      15.25   16.60
               137.0          138.5    1.5   0.33       7.31   16.80
               138.5          140.0    1.5   0.09       5.08   48.00
               140.0          141.5    1.5   0.11       5.80 greater
                                                                than
                                                               50.00
               141.5          143.0    1.5   0.05       2.53 greater
                                                                than
                                                               50.00
               143.0          144.5    1.5   0.07       3.68 greater
                                                                than
                                                               50.00
                    Total & Average   10.5   0.20       7.84 greater
                                                                than
                                                               35.41
               144.5          146.0    1.5   0.05       0.51 greater
                                                                than
                                                               50.00
               146.0          147.5    1.5   0.51       0.08   43.00
               147.5          149.0    1.5   0.32       0.01   42.60
               149.0          150.5    1.5   0.55       0.05   44.60
               150.5          152.0    1.5   0.87       0.02   33.90
               152.0          153.5    1.5   0.19       0.02   19.00
               153.5          155.0    1.5   2.08       1.74   37.20
               155.0          156.5    1.5   0.75       4.04   48.00
               156.5          158.0    1.5   0.27       3.54   48.40
               158.0          159.5    1.5   0.72       2.23   47.80
                    Total & Average   15.0   0.63       1.22 greater
                                                                than
                                                               41.50
---------------------------------------------------------------------
(i) Results have been released previously

Results shown in this table illustrate that the South Bolivar skarn becomes more zinc rich in the Bolivar mine area, which is consistent with this area being in the distal, zinc dominant portion of the large mineralized area at Bolivar.

Geologic mapping in the area southeast of the Bolivar pilot mine, covering an area of approximately 3 square kilometers has resulted in the identification of a major fault zone northeast of the mine that strikes NW-SE and dips steeply NE, which separates the Upper Volcanic Series from the Lower Volcanic Series. Displacement on the fault is not known. Prior to this mapping, it had been assumed that the rocks were in depositional contact, a relationship that would have little meaning in the context of mineralization in this area. Recognition of this fault, however, has clarified certain geologic relationships in that it explains why the carbonate rocks are so strongly skarnified and mineralized in the El Val -- La Pequena areas because the fault zone splays in a tension gash relationship in that area. Company geologists have collected surface samples over several meters in this area that assay up to 7% copper, which were given in a press release on April 22, 2004 but are repeated here because of the newly-recognized fault control on the mineralization.


------------------------------------------------------------
                                    Cu       Zn           Ag
Structure               Width       (%)      (%)        (g/t)
------------------------------------------------------------
La Montura                2 m     0.21     0.50         10.0
------------------------------------------------------------
La Montura                2 m     7.22     4.60         53.1
------------------------------------------------------------
La Montura                2 m     3.63    18.40         39.0
------------------------------------------------------------
------------------------------------------------------------
Total La Montura          6 m    3.69%    7.80%     34.0 g/t
------------------------------------------------------------
Central Zone              2 m    0.95%    29.3%     12.5 g/t
------------------------------------------------------------
La Pequenia               2 m     1.61     0.44        251.0
------------------------------------------------------------
La Pequenia               2 m     5.58     0.80        282.0
------------------------------------------------------------
La Pequenia               2 m     4.32     0.93        178.0
------------------------------------------------------------
------------------------------------------------------------
Total La Pequenia         6 m    3.84%    0.72%    237.0 g/t
------------------------------------------------------------

Although the Company has collected surface samples in this area, no drilling has been done. The relationship is also consistent with the distal, zinc rich mineralization in the Bolivar mine area, which typically occurs in the outer zones of alteration around a copper porphyry deposit, as well as the presence of more remnant carbonate rock in the mine area.

The fault zone, named by the Company as the Banda Fault, is inferred to be the primary feeder zone for mineralizing fluids in the Bolivar property. It extends beyond the mapped area but is several kilometers in length. Dia Bras' drill data demonstrate that the skarnified and mineralized rocks are several hundred meters thick in this area, which results in a major zone of interest for exploration as major replacement and skarn deposits are inferred to occur along the fault zone.

Surface drilling during mid-2006 was limited due to an extremely dry season this year, which resulted in lack of water for diamond drilling on the surface. The rainy season has commenced in earnest and exploration drilling is now in progress.

The area immediately to the southwest of the Banda Fault is a primary exploration target for the company, and will be drilled in the following weeks. Dia Bras plans to drill 10,000 meters of diamond holes between the Banda Fault and the El Gallo area in order to test the down-dip extension of the South Bolivar Cu-Fe-Au-Ag skarn, the downward extension of the Increible breccia pipe, and to test for the occurrence of replacement deposits along the Banda Fault.

Mr. Andre St-Michel, engineer and Chief Operating Officer and Executive Vice-President of Dia Bras, is the qualified person within the meaning of NI43-101.

Method of analysis

The analyses were conducted at Chemex Laboratories in Vancouver by fire assay for precious metals and atomic absorption for base metals.

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 copper-zinc project and the newly acquired Cusi silver mining camp. The Company trades 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.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this press release.

Contacts:
Dia Bras Exploration Inc.
Thomas L. Robyn
Executive Chairman
514-393-8875 ext. 241

Sun International Communications
Nicole Blanchard
Managing Partner
450-627-6600

Published Sep. 29, 2006— Reads 147
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