Mr. Frank Basa reports
GOLD BULLION PROVIDES MINERAL RESOURCE ESTIMATE FOR GRANADA
Gold Bullion Development Corp. has
released an independent NI 43-101-compliant gold mineral resource
estimate on its Granada gold property, located along the prolific
Cadillac trend in northwestern Quebec, five kilometres south of the city of
Rouyn-Noranda.
Highlights include the following:
The in situ measured resource is 97,700 ounces (3.02 million tonnes grading 1.01
grams per tonne), indicated resource is 543,400 ounces (17.04 million tonnes
grading 0.99 g/t), and inferred resource is 846,600 ounces gold (23.93
million tonnes grading 1.10 g/t Au) using a cut-off grade of 0.40 g/t.
The selected base-case in-pit measured resource is 95,300 ounces (2.9
million tonnes grading 1.02 g/t), indicated resource is 435,600 ounces
(12.49 million tonnes grading 1.08 g/t), and inferred resource is 135,600
ounces gold (3.4 million tonnes grading 1.24 g/t Au) using a cut-off
grade of 0.40 g/t based on a Whittle-optimized pit shell simulation
using estimated operating costs, a gold price of $1,300 per ounce and
a corresponding lower cut-off grade of 0.4 gram per tonne gold.
Remaining underground resources under the selected base-case in-pit
surface above a cut-off grade of 2.0 g/t is 273,200 ounces (2.32
million tonnes grading 3.66 g/t).
Previous small open pits have been taken into account and are starting
surfaces of optimization while the historical production of 51,476
ounces (181,744 short tons at 0.28 ounce per short ton) from 1930 to 1935 is included in the
resource statement (cannot physically remove from measured, indicated
or inferred).
The mineralized system is still open at depth and laterally.
SGS Canada Inc. (SGS Geostat office of Blainville, Que.) is the independent resource estimate consultant for the Granada project
which has authorized the release of the estimates.
An attached table summarizes the SGS Geostat block model estimates using
variable cut-off grades.
GRANADA GOLD DEPOSIT
IN SITU RESOURCE ESTIMATES
Class Tonnage Au g/t Au Cut-
000s grade oz off
Measured 100 4.56 14,400 3.0+
300 3.24 26,300 2.0+
900 1.88 56,300 1.0+
1,100 1.74 61,100 0.9+
1,300 1.59 67,500 0.8+
1,600 1.46 73,100 0.7+
1,900 1.30 80,700 0.6+
2,400 1.16 88,600 0.5+
3,000 1.01 97,700 0.4+
4,000 0.85 108,100 0.3+
Indicated 600 4.67 97,500 3.0+
1,400 3.41 161,000 2.0+
4,600 1.99 306,300 1.0+
5,400 1.84 329,700 0.9+
6,500 1.67 361,500 0.8+
7,700 1.52 392,400 0.7+
9,800 1.34 436,400 0.6+
12,500 1.17 485,200 0.5+
16,400 0.99 543,400 0.4+
22,700 0.81 614,500 0.3+
Inferred 1,700 4.48 255,800 3.0+
2,900 3.60 346,700 2.0+
6,500 2.35 513,600 1.0+
7,600 2.16 545,700 0.9+
9,500 1.90 600,700 0.8+
10,900 1.74 636,800 0.7+
13,500 1.53 692,200 0.6+
17,800 1.30 768,800 0.5+
23,100 1.10 846,600 0.4+
33,200 0.87 961,300 0.3+
Note: rounded numbers, base-case cut-
off grade greater than 0.4 g/t
SGS also estimated an in-pit resource within a Whittle-optimized pit
shell using a base-case gold price of $1,300 per ounce. An attached table
summarizes the in-pit resources with the selected base case in
Whittle optimizations.
Classification Tonnage Au g/t Au
in pit grade oz
Measured 2,902,000 1.02 95,300
Indicated 12,490,000 1.08 435,600
Inferred 3,403,000 1.24 135,600
Meas. plus ind. 15,392,000 1.07 530,900
The in-pit estimate is based on a mining cost of $2.00 per tonne and
a processing cost of $16.00 per tonne (including general fees and
administration costs), assuming gravity cyanidation treatment of the
mineralized material, giving base cost of $29.30 per tonne including
stripping. Other assumptions include 94.1-per-cent recovery of gold, and pit
wall slope angle of 45 degrees in the south footwall and 50 degrees in
the north hangingwall.
Details on the parameters of the resource estimates are as follows:
The database used for Granada comprised a total of 57,803 metres of
drilling obtained from the 2009-2010-2011 Gold Bullion Development drill programs, now 326 of the 404 holes drilled to date.
Most NQ assays reported by Gold Bullion were obtained by standard 50-gram
fire assaying -- atomic absordption finish or gravimetric finish -- and another fraction by
screen metallics at various laboratories, ALS Chemex laboratories in Val
d'Or, Que., Accurassay, Lab Expert and Swastika. As additional quality assurance/quality control,
SGS Geostat has carried an extensive independent sampling program with
total gold testing and pulp reassays from various laboratories, in addition
to half-witness-core complete reassay program in order to get
confidence and enable preparation of an NI 43-101-compliant estimate of
resources.
The SGS database made of Gold Bullion validated data also comprised a
total of 57,689 assays.
The estimates were done using inverse distance square (ID2) as the
interpolation method based on 1.5-metre analytical composites.
Composites calculations are based on original samples value and were
afterward capped at 20 g/t.
All estimates are based on a parent cell dimension of five metres east, five
metres north and five metres height with search ellipsoid and estimation
parameters determined for the mineralized zone geometry. The block
model grid extends from UTM 646,200 E to 647,650 E and 5,337,600 N to
5,338,850 N, from negative 350 m to negative 250 m above sea level, site surface elevation
around 320 m.
Geological interpretation for the deposit identified one main
structurally controlled mineralized domain including higher grades
within the envelope hosted by conglomerates of the Timiskaming group.
The estimation of the mineralized domain was done in three runs where the
first required a minimum of four holes using a maximum of three composites per
hole within a search ellipsoid of 50 m by 30 m by five m dipping 47 degrees
N, while the second run used a minimum of three holes within a search
ellipsoid of 100 m by 60 m by 10 m dipping 47 degrees N, and the last
run, one hole within the domain, minimum three composites in 150 m by 100 m
by 15 m dipping 47 degrees N.
For the classification, four holes with three composites were within an ellipsoid 30 m by 20 m by
five m for measured, three holes with three composites were within an ellipsoid 60 m by
40 m by 10 m for indicated, and the rest being inferred.
Underground voids (shaft and drifts) were modelled from historical mine
plans, and adjusted according to positions of drill intersections in
stopes and drifts. The stopes could not be placed in space with
accuracy. Historical production from underground needs to be subtracted
from the resource estimate.
Tonnage estimates are based on rock densities of 2.70 tonnes per cubic
metre.
The resource estimates using the lower cut-off grade of 0.4 g/t Au is
emphasized for reporting purposes as this is the in-pit cut-off
grade estimated for the $1,300 Whittle shell, which represents the
reasonable potential of economic extraction in SGS qualified person's opinion.
Additional details will be provided in the technical report to be issued
within the next 45 days.
Claude Duplessis, Ing, of SGS is the qualified person who has
reviewed this news release and is responsible for the technical
information reported herein, including verification of the data
disclosed.
We seek Safe Harbor.
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