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Along a Strike Length of 1,250 Meters

posted on Nov 29, 2008 11:55AM

November 28, 2008

Oroco Resource Corp.: Surface Sampling Extends Mineralized Zone at Cerro Prieto Along a Strike Length of 1,250 Meters

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Nov. 28, 2008) - Oroco Resource Corp. (TSX VENTURE:OCO) is pleased to announce the results from its surface trenching and mapping program on the Cerro Prieto property in Sonora State, Mexico.

A program of sampling across the mineralized structure for a strike length of 1,250 meters at 50 meter intervals was completed and included sampling of bulldozer trenches, hand dug trenches and outcrops. Due to the rugged nature of the topography bulldozer trenches were limited to the north end of the claim group from lines 750 meters north to 1250 meters north. Hand trenching and outcrop sampling were completed from line 0 to line 700 meters north. Previously, the company announced the results from a trench across the zone at 1075N which assayed 0.40 g/t Au, 79.7 g/t Ag, 0.32% Pb and 0.47% Zn over 36.3 meters (News Release dated September 9, 2008).

On several sections collapsed historical stopes and surface excavations prevented a full cross section of samples to be taken. As well, in many instances continuous sampling was hampered by steep topography. In the following table both situations are designated as open in both directions or open in 1 direction.

Locations of the surface trenching and mapping program may be viewed on the Oroco website at http://www.orocoresourcecorp.com/Cer... .

Samples are chip samples of at least 0.5 meters long and the lengths of the samples are controlled by the geology encountered. The maximum sample length is 2.0 meters.

Conclusions from the results are as follows:

1. The zone has now been tested on surface for a strike length of 1,250 meters, is continuously mineralized over that strike length and is open in both directions;

2. Previous mining activities left several areas with substantial precious metal grades:

a) TR100N - 7.40 g/t Au, 63.5 g/t Ag over 5.1 meters

b) TR150N - 8.45 g/t Au, 27.4 g/t Ag over 2.8 meters

c) TR400N - 8.35 g/t Au, 81.8 g/t Ag over 3.4 meters

d) TR450N - 5.89 g/t Au, 27.1 g/t Ag over 3.3 meters and 5.35 g/t Au, 110.2 g/t Ag over 3.2 meters

e) TR550N - 5.06 g/t Au, 145.2 g/t Ag over 6.9 meters

f) TR600N - 6.42 g/t Au, 82.9 g/t Ag over 2.1 meters

g) TR700N - 5.97 g/t Au, 51.8 g/t Ag over 2.6 meters

3. In general, base metal values are higher in the southern trenches (TR000 to TR200N). Because of elevation differences, the southern trenches cut across the mineralized zone much lower in the epithermal system than the more northerly trenches.

---------------------------------------------------------------------------
          Length     Au      Ag     Pb     Zn
Trench #      (m)  (g/t)   (g/t)    (%)    (%)  Remarks
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR00         8.1   0.52    11.7   0.31   0.89   Open both directions
---------------------------------------------------------------------------
 incl        1.6   1.43    13.4   0.55   2.09
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR050N       6.1   2.05     9.0   0.72   1.21   Open 1 direction
---------------------------------------------------------------------------
 incl        1.5   5.81     9.6   0.66   1.41
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR100N      12.9   0.46    21.4   0.30   0.76   Open both directions
---------------------------------------------------------------------------
             9.8   4.08    36.2   0.34   1.01   Open 1 direction
---------------------------------------------------------------------------
 incl        5.1   7.40    63.5   0.54   1.57
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR150N       5.2   4.79    21.5   0.16   0.33   Open both directions
---------------------------------------------------------------------------
 incl        2.8   8.45    27.4   0.11   0.39
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR200N       9.1   0.11     3.5   0.13   0.40   Open 1 direction
---------------------------------------------------------------------------
 incl        2.0   0.39     8.1   0.37   1.02
---------------------------------------------------------------------------
            14.0                                Not sampled
---------------------------------------------------------------------------
             7.5   0.28     4.1   0.19   0.52   Open 1 direction
---------------------------------------------------------------------------
 incl       0.65   1.31     4.9   0.89   2.47
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR250N       3.2   0.80     3.9   0.05   0.11   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR300N       2.9   1.05    27.2   0.09   0.13   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR350N       4.1   1.10    74.7   0.13   0.20   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR400N       3.4   8.35    81.8   0.18   0.24   Open both directions
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR450N       3.3   5.89    27.1   0.10   0.24   Open 1 direction
---------------------------------------------------------------------------
             3.0                                Not sampled
---------------------------------------------------------------------------
             3.2   5.35   110.2   0.14   0.15   Open both directions
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR500N       2.4   1.25     9.3   0.16   0.37   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR550N       2.3   0.07   104.6   0.15   0.24   Open both directions
---------------------------------------------------------------------------
            12.0                                Not sampled
---------------------------------------------------------------------------
            21.5   1.90    82.9   0.16   0.19   Open both directions
---------------------------------------------------------------------------
 incl        6.9   5.06   145.2   0.22   0.18
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR600N       4.6   0.81    67.1   0.16   0.17   Open both directions
---------------------------------------------------------------------------
 incl        2.8   1.12   108.4   0.23   0.21
---------------------------------------------------------------------------
             9.0                                Open stope
---------------------------------------------------------------------------
             8.0   2.11   113.0   0.33   0.39   Open both directions
---------------------------------------------------------------------------
 incl        2.1   6.42    82.9   0.22   0.68
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR650N       3.3   1.84    16.0   0.20   0.34   Open both directions
---------------------------------------------------------------------------
             4.0                                Not sampled
---------------------------------------------------------------------------
             0.7   5.76     4.5   0.09   0.19   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR700N       5.4   3.04    34.4   0.11   0.33
---------------------------------------------------------------------------
 incl        2.6   5.97    51.8   0.18   0.46
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR750N       6.0   0.20    57.0   0.04   0.05
---------------------------------------------------------------------------
 incl        1.5   0.61   118.0   0.05   0.07
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR800N       9.0   0.52    52.6   0.03   0.05
---------------------------------------------------------------------------
 incl        3.0   1.11   126.4   0.04   0.09
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR850N      16.5   0.65    55.3   0.08   0.13   Cross trench with one below
---------------------------------------------------------------------------
            16.5   0.39   110.2   0.22   0.32
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR900N       2.1   0.16    11.3   1.18   2.39   Open both directions
---------------------------------------------------------------------------
            2.05   0.61    49.4   0.16   0.23   Open 1 direction
---------------------------------------------------------------------------
             4.2   0.70    67.0   0.08   0.07
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR950       11.2   0.18    33.5   0.07   0.13   Open both directions
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1000       6.7   0.40    32.6   0.15   0.13   Open both directions
---------------------------------------------------------------------------
 incl        3.3   0.63    55.8   0.16   0.04
---------------------------------------------------------------------------
            13.0                                Open stope
---------------------------------------------------------------------------
             8.7   1.36    57.0   0.19   0.16
---------------------------------------------------------------------------
 incl        4.7   2.42    36.3   0.24   0.21
---------------------------------------------------------------------------
 and         4.0   0.12    81.3   0.13   0.10
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1050N      6.6   0.69   108.5   0.08   0.19   Open 1 direction
---------------------------------------------------------------------------
 incl        2.1   0.06   249.4   0.06   0.23
---------------------------------------------------------------------------
             7.0                                Not sampled
---------------------------------------------------------------------------
             2.4   1.32    56.8   0.28   0.33   Open both directions
---------------------------------------------------------------------------
             5.0                                Not sampled
---------------------------------------------------------------------------
            11.0   1.40    69.6   0.18   0.26   Open both directions
---------------------------------------------------------------------------
             3.0                                Not sampled
---------------------------------------------------------------------------
             9.0   2.17   107.9   0.16   0.42   Open both directions
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1100N     8.85   0.56     8.6   0.31   0.42   Open both directions
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1150N     20.4   1.89     9.8   0.41   0.74   Open both directions
---------------------------------------------------------------------------
 incl       11.8   3.03    12.5   0.44   0.97
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1200N      1.0   5.35    15.0   0.48   0.58
---------------------------------------------------------------------------
             1.2   2.19     4.9   0.30   0.27   Open 1 direction
---------------------------------------------------------------------------

---------------------------------------------------------------------------
TR1250N      2.4   0.39    66.9   0.90   1.29   Open both directions
---------------------------------------------------------------------------

In April of this year the company commenced the recently completed phase 1 diamond drill program at Cerro Prieto. The mineralized zone has now been drill tested vertically at 100 meter centers along a strike length of at least 600 meters, from section 150 meters north to section 750 meters north, to a maximum depth of 400 meters, allowing the calculation of an initial estimation of resources. As reported October 31, 2008, a step out hole (CP023), located a further 300 meters along strike at section 1050 meters north, intersected the mineralized zone and returned assays of 2.80 g/t Au, 51.5 g/t Ag as well as elevated base metal values, across a true thickness of 8.7 meters.

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