Underground Delineation Drilling at Northgate Minerals? Young-Davidson Mining Project Confirms Zone Geometry and Grade
VANCOUVER, May 26, 2011 /CNW/ --
Results Show Potential for Higher 'As Mined' Grade from the Underground
VANCOUVER, May 26, 2011 /CNW/ - Northgate Minerals Corporation (TSX:
NGX, NYSE Amex: NXG) is pleased to announce results from a highly
successful underground delineation drill program at its 100% owned
Young-Davidson Mining Project located in northern Ontario.
Delineation drilling was initiated to define the stope limits for
underground mining within the Upper Boundary Zone ('UBZ'). Results from
the drill program have confirmed the grade, continuity and width of the
UBZ, which contains 3.64 million tonnes of ore and is scheduled for
mining in the early years of underground production. Young-Davidson is
currently forecasting an initial 15-year mine-life with production
commencing in 2012 from a small open pit before mining moves
underground in 2014. The area of delineation drilling covers
approximately half of the ore tonnage in the UBZ.
UBZ Drill Highlights
-- The UBZ delineation drill program consisted of 66 holes with
much closer-spaced drilling than what was used to develop the
initial reserve. When combined with the historic 'as mined' ore
grade on the property of 3.39 grams per tonne (g/t), results
continue to suggest a strong probability that the ore grade
will be closer to the historic 'as mined' grade when the
underground orebody is actually mined.
-- Of the 66 holes that were drilled in the UBZ, 26 holes returned
a significant result of greater than 95 gram-metres and 70% of
the holes returned greater than 50 gram-metres.
-- Hole YR-36: returned 11.13 g/t uncut over 44.0 metres ('m')
(estimated 37.0 m true thickness).
-- Hole YR-17: returned 6.34 g/t uncut over 44.0 m (estimated 43.6
m true thickness).
-- Hole YR-16: returned 5.32 g/t over 54.8 m (estimated 45.9 m
true thickness).
-- Hole YM10-16: returned 4.64 g/t over 58.8 m (estimated 51.3 m
true thickness).
-- Drill results reported herein will be used to update reserve
and resource estimates at the end of the year.
'The delineation drill program within the Upper Boundary Zone has been
extremely successful' commented Ken Stowe, President and CEO. 'Results
from this delineation program are essential as we move closer to our
first gold pour in 2012, as this information gives us confidence in the
orebody, confirming the grade, continuity and width of the zone. In
addition, the comparison between cut and uncut drill results from the
recent drilling continues to indicate that there is strong potential
for the actual 'as mined' grade of the current underground reserve to
be up to 10% higher than our current reserve grade, which we will look
for when the first underground ore is delivered to the mill in 2014.'
UBZ Delineation Drill Program
The UBZ delineation drill program began in 2008. Results from the 2008
drill program were used in the current reserve and resource estimate,
but have not been individually reported before. The program was put on
hold in 2009 and part of 2010 as Northgate had sufficient drill
information to form its initial proven and probable reserve estimate of
2.8 million ounces of gold(1). Drilling re-commenced in the fall of 2010 with approximately 6,350 m
drilled. In total, 66 holes have been completed (28 NQ and 38 BQ
diameter core holes) in the near-surface portion of the UBZ. These
holes are required to define final stoping boundaries with increased
resolution and to plan for an efficient and safe mining sequence over
the life of the mine.
The UBZ in relation to the current Young-Davidson reserve is shown on
the longitudinal section in Figure 1. The UBZ is located on the
structural footwall of a steeply south-dipping syenite contact with
meta-sediments over an area equivalent to three hectares. The area of
infill drilling covers approximately half of the ore tonnage in the UBZ
(see Figure 2). The mineralization style is disseminated with pyrite
associated with sheeted quartz-pyrite veinlets in well developed
potassic alteration. Delineation drilling has been conducted on
sections spaced 15 m to 30 m apart from ramp access located 50 m - 70 m
in the footwall of the mineralization. Previous drilling completed to
develop the current reserve was wider-spaced (30 m to 45 m centres).
Of the 66 holes completed from the UBZ delineation program, 26 holes
returned intervals greater than 95 gram-metres and are presented in
Table 1 (in bold). Complete drill results can be found in Appendix 1 at
the end of this press release. Results are presented as interval
totals for cut (to 20 g/t gold) and uncut analyses. Delineation
drilling for the near-surface sector of the UBZ has been highly
successful confirming the grade, continuity and widths of the original
resource model and has added new resource potential in the footwall of
the UBZ (see Figures 3 - 7) as shown by the red lines appearing outside
of the resource outline (in magenta).
Uncut delineation drill results averaged 3.76 g/t gold or 3.39 g/t gold
when cut to 20 g/t. The 11% difference between cut and uncut assays is
consistent with the difference noted in the wider-spaced exploration
drilling that was used to generate the 2.8 million ounce reserve at
Young-Davidson. Capping is a technique that is employed in the
estimation of resources and reserves to apply a margin of conservation
to these estimates in the event that higher grade nuggets are
disproportionately represented in the sparse sampling. The fact that
the difference between cut and uncut grades continues to be the same in
the closer-spaced delineation drilling that was recently completed
combined with the fact that the historic 'as mined' grade on the
property was 12.7% higher than the current reserve grade, suggests the
strong possibility that 'as mined' ore grades from the underground
orebody will exceed the current reserve grade.
Next Steps
Results from this drill program will be incorporated into the annual
reserve and resource update at the end of the year. Delineation
drilling on the property is ongoing and future efforts will focus on
the upper part of the Lucky Zone ore lenses.
Figure 1 - Young-Davidson Longitudinal Section (looking north). UBZ in
red with black outline.
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig1.JPG
Figure 2 - Young-Davidson Upper Boundary Zone
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig2.JPG
Figures 3 - 7 illustrate each drilling section through the UBZ
confirming the original geometry and widths determined from the initial
2008 resource work. The red lines are the mineralized portions of the
drill holes reported in Table 1 and Appendix 1, while magenta shows the
resource outline for the UBZ. Mineralized portions of the drill holes
appearing outside of the resource outline demonstrate new resource
potential in the footwall of the UBZ. At the west end of the resource,
there is a post-mineral diabase dyke, which is actually located in a
slightly lower position than originally modeled.
Table 1: Selected Assay Results from UBZ Delineation Drill Program (>95
gram-metres in bold)
____________________________________________________________________
| |From | To |Interval| True |Gold Uncut|Gold Cut| |
|Hole ID| (m) | (m) | (m) |Thickness| (g/t) | 20 g/t | Comment |
| | | | | (m) | | | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-13|35.7 |78.1 | 42.4 | 38.9 | 3.41 | 2.85 |Upper UBZ|
|_______|_____|_____|________|_________|__________|________|_________|
|incl |35.7 |51.5 | 15.8 | 14.5 | 5.84 | 4.34 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |65.5 |78.1 | 12.6 | 11.6 | 3.75 | 3.75 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-15|38.0 |52.5 | 14.5 | 14.1 | 1.26 | 1.26 |Upper UBZ|
|_______|_____|_____|________|_________|__________|________|_________|
|incl |38.0 |46.5 | 8.5 | 8.2 | 8.50 | 8.50 |Upper UBZ|
|_______|_____|_____|________|_________|__________|________|_________|
| |65.0 |81.8 | 16.8 | 16.5 | 1.46 | 1.46 |Upper UBZ|
|_______|_____|_____|________|_________|__________|________|_________|
| |97.5 |123.5| 26.0 | 25.5 | 3.86 | 3.86 |Upper UBZ|
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-16|10.3 |12.4 | 2.1 | 1.8 | 3.65 | 3.65 | UBZ |
| | | | | | | |Footwall |
|_______|_____|_____|________|_________|__________|________|_________|
| |28.3 |30.2 | 1.9 | 1.6 | 5.58 | 5.58 | UBZ |
| | | | | | | |Footwall |
|_______|_____|_____|________|_________|__________|________|_________|
| |57.8 |116.6| 58.8 | 51.3 | 4.64 | 4.64 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |59.9 |109.0| 49.1 | 42.7 | 5.27 | 5.27 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |82.3 |104.5| 22.2 | 19.3 | 6.43 | 6.43 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-20|59.5 |113.6| 54.1 | 52.0 | 4.32 | 2.48 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |59.5 |77.5 | 18.0 | 17.3 | 9.78 | 4.24 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |82.9 |98.3 | 15.4 | 14.8 | 2.51 | 2.51 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |102.6|108.8| 6.2 | 6.0 | 2.45 | 2.45 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-21|47.5 |52.0 | 4.5 | 4.3 | 5.22 | 5.22 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |58.0 |61.0 | 3.0 | 2.9 | 4.34 | 4.34 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |80.5 |113.3| 32.8 | 31.4 | 4.27 | 3.53 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-23|64.0 |68.5 | 4.5 | 4.0 | 3.02 | 3.02 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |78.3 |104.0| 25.7 | 22.9 | 6.26 | 6.26 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-24|51.7 |104.1| 52.4 | 51.4 | 1.92 | 1.92 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |51.7 |65.5 | 13.8 | 13.5 | 2.21 | 2.21 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |72.7 |104.1| 31.4 | 30.8 | 2.19 | 2.19 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM10-26|51.2 |111.2| 60.0 | 53.8 | 1.96 | 1.96 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |51.2 |77.8 | 26.6 | 23.9 | 2.73 | 2.73 | |
|_______|_____|_____|________|_________|__________|________|_________|
| | | | | | | | Hole |
|YM10-28|60.5 |65.0 | 4.5 | 3.7 | 3.30 | 3.30 |extended |
| | | | | | | | to test |
| | | | | | | | syenite |
|_______|_____|_____|________|_________|__________|________|_________|
| |70.5 |115.1| 44.6 | 36.8 | 2.61 | 2.61 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |77.4 |108.5| 31.1 | 25.5 | 3.15 | 3.15 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM11-29|72.01|109.2| 37.19 | 33.3 | 5.37 | 5.37 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM11-31|52.65|55.65| 3.0 | 3.0 | 3.08 | 3.08 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |70.83|105.8| 34.97 | 34.9 | 3.72 | 3.67 | |
|_______|_____|_____|________|_________|__________|________|_________|
| | 113 |117.0| 4.0 | 4.0 | 1.54 | 1.54 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YM11-39|81.9 |95.0 | 13.1 | 11.9 | 14.68 | 7.31 | |
|_______|_____|_____|________|_________|__________|________|_________|
|incl |84.9 |95.0 | 10.1 | 9.2 | 18.77 | 9.21 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-12 |34.1 |71.0 | 36.9 | 35.9 | 3.59 | 3.59 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-13 |38.4 |87.1 | 48.7 | 47.3 | 2.61 | 2.38 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-14 |61.0 |117.1| 56.1 | 44.9 | 4.85 | 4.85 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-15 |28.8 |36.0 | 7.2 | 4.9 | 1.95 | 1.95 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |64.9 |109.8| 44.9 | 31.0 | 4.05 | 4.05 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |122.0|132.4| 10.4 | 7.3 | 2.67 | 2.67 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-16 |47.0 |101.8| 54.8 | 45.9 | 5.32 | 5.32 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-17 |29.0 |73.0 | 44.0 | 43.6 | 6.34 | 6.18 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-25 |34.5 |45.7 | 11.2 | 9.2 | 4.73 | 4.73 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |64.2 |101.5| 37.3 | 30.7 | 3.18 | 3.18 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-30 |48.8 |97.3 | 48.5 | 43.3 | 3.88 | 3.87 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-31 |39.1 |77.6 | 38.5 | 38.5 | 3.99 | 3.99 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-35 |45.5 |79.1 | 33.6 | 30.9 | 4.65 | 4.65 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-36 |61.0 |105.0| 44.0 | 37.0 | 11.13 | 5.06 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-37 |58.0 |128.0| 70.0 | 52.8 | 2.66 | 2.66 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-38 |37.0 |46.9 | 9.9 | 9.4 | 11.39 | 5.84 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |62.0 |72.0 | 10.0 | 9.5 | 9.65 | 7.83 | |
|_______|_____|_____|________|_________|__________|________|_________|
|YR-50 |67.5 |89.4 | 21.9 | 19.8 | 6.41 | 5.86 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |94.5 |100.4| 5.9 | 5.3 | 3.55 | 3.55 | |
|_______|_____|_____|________|_________|__________|________|_________|
| |117.0|127.5| 10.5 | 9.5 | 2.15 | 2.15 | |
|_______|_____|_____|________|_________|__________|________|_________|
Figure 3 - UBZ Drill Section 23510
(Red lines are mineralized portions of the drill holes reported in Table
1. Magenta shows the resource outline for the UBZ. Red lines appearing
outside of the resource outline represent new resource potential).
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig3.JPG
Figure 4 - UBZ Drill Section 23540
(Red lines are mineralized portions of the drill holes reported in Table
1. Magenta shows the resource outline for the UBZ. Red lines appearing
outside of the resource outline represent new resource potential).
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig4.JPG
Figure 5 - UBZ Drill Sections 23570
(Red lines are mineralized portions of the drill holes reported in Table
1. Magenta shows the resource outline for the UBZ. Red lines appearing
outside of the resource outline represent new resource potential).
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig5.JPG
Figure 6 - UBZ Drill Section 23600
(Red lines are mineralized portions of the drill holes reported in Table
1. Magenta shows the resource outline for the UBZ. Red lines appearing
outside of the resource outline represent new resource potential).
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig6.JPG
Figure 7 - UBZ Drill Section 23630
(Red lines are mineralized portions of the drill holes reported in Table
1. Magenta shows the resource outline for the UBZ. Red lines appearing
outside of the resource outline represent new resource potential).
www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDUBZFig7.JPG
Appendix 1: Complete Assay Results from UBZ Delineation Drill Program
_____________________________________________________________________
|Hole ID| From | | | True | | | |
| | (m) | To |Interval|Thickness|Gold Uncut|Gold Cut| |
| | | (m) | (m) | (m) | (g/t) | 20 g/t | Comment |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-04| 39.5 |44.0 | 4.5 | 4.4 | 3.19 | 3.19 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|YM10-05| No significant values |
|_______|_____________________________________________________________|
|YM10-06| 37.7 |42.9 | 2.64 | 3.9 | 2.64 | 2.64 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 60.8 |63.9 | 3.1 | 2.3 | 2.48 | 2.48 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 83.0 |91.9 | 8.9 | 6.9 | 2.94 | 2.94 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|YM10-07| 80.8 | 88 | 7.2 | 6.6 | 1.19 | 1.19 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|YM10-08| No significant values |
|_______|_____________________________________________________________|
|YM10-09| No significant values |
|_______|_____________________________________________________________|
|YM10-10| 31.6 |44.4 | 12.8 | 12.7 | 5.98 | 5.98 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 59.4 |66.3 | 6.9 | 6.9 | 1.20 | 1.20 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-11| 43.2 |57.7 | 13.8 | 11.4 | 2.63 | 2.63 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|incl | 43.2 |49.2 | 6.0 | 4.7 | 4.41 | 4.41 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 70.7 |91.5 | 20.8 | 16.5 | 4.51 | 3.92 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 75.7 |91.5 | 15.8 | 12.3 | 5.50 | 4.74 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 88.5 |91.5 | 3.0 | 2.3 | 22.04 | 18.00 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-12| 3.0 | 8.7 | 5.7 | 4.2 | 1.93 | 1.93 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 38.2 |48.0 | 9.8 | 7.3 | 0.98 | 0.98 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-13| 35.7 |78.1 | 42.4 | 38.9 | 3.41 | 2.85 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|incl | 35.7 |51.5 | 15.8 | 14.5 | 5.84 | 4.34 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 65.5 |78.1 | 12.6 | 11.6 | 3.75 | 3.75 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-14| 28.8 |40.3 | 11.5 | 10.4 | 1.11 | 1.11 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|incl | 32.3 |40.3 | 8.0 | 7.3 | 1.23 | 1.23 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 37.9 |40.3 | 2.4 | 2.2 | 2.47 | 2.47 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 95.8 |101.0| 5.2 | 4.7 | 1.56 | 1.56 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-15| 38.0 |52.5 | 14.5 | 14.1 | 1.26 | 1.26 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|incl | 38.0 |46.5 | 8.5 | 8.2 | 8.50 | 8.50 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 65.0 |81.8 | 16.8 | 16.5 | 1.46 | 1.46 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
| | 97.5 |123.5| 26.0 | 25.5 | 3.86 | 3.86 |Upper UBZ|
|_______|______|_____|________|_________|__________|________|_________|
|YM10-16| 10.3 | | | | | | UBZ |
| | |12.4 | 2.1 | 1.8 | 3.65 | 3.65 |Footwall |
|_______|______|_____|________|_________|__________|________|_________|
| | 28.3 | | | | | | UBZ |
| | |30.2 | 1.9 | 1.6 | 5.58 | 5.58 |Footwall |
|_______|______|_____|________|_________|__________|________|_________|
| | 57.8 |116.6| 58.8 | 51.3 | 4.64 | 4.64 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 59.9 |109.0| 49.1 | 42.7 | 5.27 | 5.27 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 82.3 |104.5| 22.2 | 19.3 | 6.43 | 6.43 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-17| 74.1 |124.3| 50.2 | 36.0 | 1.82 | 1.82 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 74.1 |86.8 | 12.7 | 9.1 | 4.33 | 4.33 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-18| 34.9 | | | | | |Footwall |
| | |42.4 | 7.5 | 6.1 | 2.11 | 2.11 | UBZ |
|_______|______|_____|________|_________|__________|________|_________|
| | 58.5 | | | | | |Footwall |
| | |70.0 | 11.5 | 9.4 | 2.77 | 2.77 | UBZ |
|_______|______|_____|________|_________|__________|________|_________|
| | 83.6 |123.2| 39.6 | 33.3 | 1.59 | 1.59 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |105.5 |123.2| 17.7 | 14.9 | 2.30 | 2.30 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 130 |141.2| 11.2 | 9.5 | 2.34 | 2.34 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-19| 77.4 |113.8| 36.4 | 36.3 | 1.86 | 1.86 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 86.5 |113.8| 27.3 | 27.2 | 2.12 | 2.12 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 86.5 |100.0| 13.5 | 13.5 | 2.63 | 2.63 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-20| 59.5 |113.6| 54.1 | 52.0 | 4.32 | 2.48 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 59.5 |77.5 | 18.0 | 17.3 | 9.78 | 4.24 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 82.9 |98.3 | 15.4 | 14.8 | 2.51 | 2.51 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |102.6 |108.8| 6.2 | 6.0 | 2.45 | 2.45 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-21| 47.5 |52.0 | 4.5 | 4.3 | 5.22 | 5.22 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 58.0 |61.0 | 3.0 | 2.9 | 4.34 | 4.34 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 80.5 |113.3| 32.8 | 31.4 | 4.27 | 3.53 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-22| 4.5 | 7.8 | 3.3 | 2.6 | 3.12 | 3.12 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 54.7 |57.7 | 3.0 | 2.4 | 2.73 | 2.73 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 63.0 |73.2 | 10.2 | 8.2 | 3.09 | 3.09 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 92.5 |117.0| 24.5 | 20.6 | 1.71 | 1.71 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-23| 64.0 |68.5 | 4.5 | 4.0 | 3.02 | 3.02 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 78.3 |104.0| 25.7 | 22.9 | 6.26 | 6.26 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-24| 51.7 |104.1| 52.4 | 51.4 | 1.92 | 1.92 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 51.7 |65.5 | 13.8 | 13.5 | 2.21 | 2.21 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 72.7 |104.1| 31.4 | 30.8 | 2.19 | 2.19 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-25| 46.6 |57.7 | 11.1 | 11.1 | 2.32 | 2.32 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 69.0 |103.0| 34.0 | 33.9 | 2.39 | 2.39 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 69.0 |85.5 | 16.5 | 16.3 | 3.70 | 3.70 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-26| 51.2 |111.2| 60.0 | 53.8 | 1.96 | 1.96 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 51.2 |77.8 | 26.6 | 23.9 | 2.73 | 2.73 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-27| 75.9 |79.9 | 4.0 | 3.9 | 2.14 | 2.14 | |
|_______|______|_____|________|_________|__________|________|_________|
| |101.5 |115.0| 13.5 | 13.3 | 3.25 | 3.25 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM10-28| 60.5 | | | | | | Hole |
| | | | | | | |extended |
| | | | | | | | to test |
| | |65.0 | 4.5 | 3.7 | 3.30 | 3.30 | syenite |
|_______|______|_____|________|_________|__________|________|_________|
| | 70.5 |115.1| 44.6 | 36.8 | 2.61 | 2.61 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 77.4 |108.5| 31.1 | 25.5 | 3.15 | 3.15 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-29|72.01 |109.2| 37.19 | 33.3 | 5.37 | 5.37 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-30| 67.5 |79.0 | 11.5 | 11.0 | 2.50 | 2.50 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 70.9 |79.0 | 8.1 | 7.8 | 2.64 | 2.64 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 84.5 |112.3| 27.8 | 26.7 | 2.39 | 2.39 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 93 |112.3| 19.3 | 18.5 | 2.83 | 2.83 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-31|52.65 |55.65| 3.0 | 3.0 | 3.08 | 3.08 | |
|_______|______|_____|________|_________|__________|________|_________|
| |70.83 |105.8| 34.97 | 34.9 | 3.72 | 3.67 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 113 |117.0| 4.0 | 4.0 | 1.54 | 1.54 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-32| 52.5 |55.5 | 3.0 | 2.8 | 3.11 | 3.11 | |
|_______|______|_____|________|_________|__________|________|_________|
| |65.24 |75.0 | 9.76 | 9.1 | 10.32 | 5.93 | |
|_______|______|_____|________|_________|__________|________|_________|
| |132.3 |135.5| 3.2 | 3.0 | 2.29 | 2.29 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-33| 82.0 |99.6 | 17.6 | 12.6 | 3.96 | 3.96 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 88.0 |99.6 | 11.6 | 8.2 | 5.60 | 5.60 | |
|_______|______|_____|________|_________|__________|________|_________|
| |145.9 |167.0| 21.1 | 16.1 | 5.37 | 2.57 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |145.9 |150.5| 4.6 | 3.5 | 18.69 | 5.88 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |156.5 |167.0| 10.5 | 8.0 | 2.43 | 2.43 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-34| 71.3 |84.0 | 12.7 | 12.4 | 2.95 | 2.95 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 71.3 |81.0 | 9.7 | 9.4 | 3.67 | 3.67 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-35|102.45|137.0| 34.55 | 27.3 | 2.21 | 2.21 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |112.4 |129.5| 17.1 | 13.5 | 3.20 | 3.20 | |
|_______|______|_____|________|_________|__________|________|_________|
| |152.5 |172.0| 19.5 | 15.7 | 1.46 | 1.46 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 163 |172.0| 9.0 | 7.3 | 2.02 | 2.02 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-36| 88.4 |118.5| 30.1 | 27.4 | 2.67 | 2.67 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 88.4 |111.0| 22.6 | 20.6 | 2.86 | 2.86 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-37| 13.7 |15.65| 1.95 | 1.9 | 2.42 | 2.42 | |
|_______|______|_____|________|_________|__________|________|_________|
| |100.5 |106.0| 5.5 | 5.3 | 4.33 | 4.33 | |
|_______|______|_____|________|_________|__________|________|_________|
| |121.5 |127.4| 5.9 | 5.7 | 4.51 | 4.51 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-38| 87.0 |93.0 | 6.0 | 6.0 | 1.92 | 1.92 | |
|_______|______|_____|________|_________|__________|________|_________|
| |125.5 |131.5| 6.0 | 6.0 | 2.37 | 2.37 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-39| 81.9 |95.0 | 13.1 | 11.9 | 14.68 | 7.31 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 84.9 |95.0 | 10.1 | 9.2 | 18.77 | 9.21 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-40| 91.2 |112.9| 21.7 | 18.4 | 4.53 | 4.32 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl | 91.2 |106.5| 15.3 | 13.0 | 5.77 | 5.47 | |
|_______|______|_____|________|_________|__________|________|_________|
|YM11-41|117.0 |149.5| 32.5 | 20.8 | 3.39 | 3.39 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |126.0 |149.5| 23.5 | 15.0 | 4.16 | 4.16 | |
|_______|______|_____|________|_________|__________|________|_________|
|incl |130.5 |149.5| 19.0 | 12.2 | 4.45 | 4.45 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-12 | 34.1 |71.0 | 36.9 | 35.9 | 3.59 | 3.59 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-13 | 38.4 |87.1 | 48.7 | 47.3 | 2.61 | 2.38 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-14 | 61.0 |117.1| 56.1 | 44.9 | 4.85 | 4.85 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-15 | 28.8 |36.0 | 7.2 | 4.9 | 1.95 | 1.95 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 64.9 |109.8| 44.9 | 31.0 | 4.05 | 4.05 | |
|_______|______|_____|________|_________|__________|________|_________|
| |122.0 |132.4| 10.4 | 7.3 | 2.67 | 2.67 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-16 | 47.0 |101.8| 54.8 | 45.9 | 5.32 | 5.32 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-17 | 29.0 |73.0 | 44.0 | 43.6 | 6.34 | 6.18 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-18 | 52.0 |66.0 | 14.0 | 13.1 | 5.77 | 3.07 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-20 | 30.2 |53.8 | 23.6 | 14.0 | 5.44 | 3.94 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 97.5 |109.5| 12.0 | 7.3 | 1.77 | 1.77 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-21 | 24.9 |37.5 | 12.6 | 10.0 | 3.72 | 3.72 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 61.7 |78.0 | 16.3 | 13.0 | 2.84 | 2.84 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-24 | 7.3 |16.0 | 8.7 | 8.4 | 4.02 | 4.02 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 33.0 |36.6 | 3.6 | 3.5 | 4.33 | 4.33 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 64.0 |79.0 | 15.0 | 14.6 | 2.65 | 2.65 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-25 | 34.5 |45.7 | 11.2 | 9.2 | 4.73 | 4.73 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 64.2 |101.5| 37.3 | 30.7 | 3.18 | 3.18 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-26 | 22.5 |27.0 | 4.5 | 4.1 | 3.20 | 3.20 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-30 | 48.8 |97.3 | 48.5 | 43.3 | 3.88 | 3.87 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-31 | 39.1 |77.6 | 38.5 | 38.5 | 3.99 | 3.99 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-32 | 41.4 |45.4 | 4.0 | 3.5 | 5.01 | 5.01 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 52.4 |55.8 | 3.4 | 3.0 | 5.40 | 5.40 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 69.5 |78.0 | 8.5 | 7.5 | 5.69 | 5.69 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-33 | 61.3 |86.0 | 24.7 | 22.0 | 3.55 | 3.55 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-34 | 69.0 |79.8 | 10.8 | 8.6 | 10.33 | 7.86 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 94.0 |100.5| 6.5 | 5.2 | 1.84 | 1.84 | |
|_______|______|_____|________|_________|__________|________|_________|
| |108.8 |122.1| 13.3 | 10.6 | 3.62 | 3.59 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-35 | 45.5 |79.1 | 33.6 | 30.9 | 4.65 | 4.65 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-36 | 61.0 |105.0| 44.0 | 37.0 | 11.13 | 5.06 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-37 | 58.0 |128.0| 70.0 | 52.8 | 2.66 | 2.66 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-38 | 37.0 |46.9 | 9.9 | 9.4 | 11.39 | 5.84 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 62.0 |72.0 | 10.0 | 9.5 | 9.65 | 7.83 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-39 | 40.0 |47.7 | 7.7 | 7.3 | 7.06 | 7.06 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 60.0 |68.0 | 8.0 | 7.6 | 2.83 | 2.83 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-40 | 65.0 |73.0 | 8.0 | 7.3 | 1.99 | 1.99 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-42 |105.0 |168.0| 62.3 | 30.5 | 2.43 | 2.43 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-48 | 93.8 |101.4| 7.6 | 6.4 | 4.33 | 4.33 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-49 | 34.6 |40.5 | 5.9 | 5.7 | 5.69 | 5.69 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 85.0 |99.0 | 14.0 | 13.6 | 2.49 | 2.49 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-50 | 67.5 |89.4 | 21.9 | 19.8 | 6.41 | 5.86 | |
|_______|______|_____|________|_________|__________|________|_________|
| | 94.5 |100.4| 5.9 | 5.3 | 3.55 | 3.55 | |
|_______|______|_____|________|_________|__________|________|_________|
| |117.0 |127.5| 10.5 | 9.5 | 2.15 | 2.15 | |
|_______|______|_____|________|_________|__________|________|_________|
|YR-51 |128.0 |135.0| 7.0 | 4.1 | 4.37 | 4.37 | |
|_______|______|_____|________|_________|__________|________|_________|
Qualified Persons
The program design, implementation, quality assurance/quality control
and interpretation of the results are under the control of Northgate's
geological staff, which includes a number of individuals who are
qualified persons as defined under NI 43-101. Carl Edmunds, PGeo,
Northgate's Exploration Manager, is responsible for the overall
supervision of the program.
* * * * * * *
Note to Investors:
The terms 'Qualified Person', 'Mineral Reserve', 'Proven Mineral
Reserve', 'Probable Mineral Reserve', 'Mineral Resource', 'Measured
Mineral Resource', 'Indicated Mineral Resource', and 'Inferred Mineral
Resource' used in this news release are defined in accordance with NI
43-101.
* * * * * * *
Northgate Minerals Corporation is a gold and copper producer with mining operations, development
projects and exploration properties in Canada and Australia. Our
vision is to be the leading intermediate gold producer by identifying,
acquiring, developing and operating profitable, long-life mining
properties.
* * * * * * *
Cautionary Note Regarding Forward-Looking Statements and Information:
This Northgate press release contains 'forward-looking information', as
such term is defined in applicable Canadian securities legislation and
'forward-looking statements' within the meaning of the United States
Private Securities Litigation Reform Act of 1995, concerning
Northgate's future financial or operating performance and other
statements that express management's expectations or estimates of
future developments, circumstances or results. Generally,
forward-looking information can be identified by the use of
forward-looking terminology such as 'expects', 'believes',
'anticipates', 'budget', 'scheduled', 'estimates', 'forecasts',
'intends', 'plans' and variations of such words and phrases, or by
statements that certain actions, events or results 'may', 'will',
'could', 'would' or 'might' 'be taken', 'occur' or 'be achieved'.
Forward-looking information is based on a number of assumptions and
estimates that, while considered reasonable by management based on the
business and markets in which Northgate operates, are inherently
subject to significant operational, economic and competitive
uncertainties and contingencies. Northgate cautions that
forward-looking information involves known and unknown risks,
uncertainties and other factors that may cause Northgate's actual
results, performance or achievements to be materially different from
those expressed or implied by such information, including, but not
limited to gold and copper price volatility; fluctuations in foreign
exchange rates and interest rates; the impact of any hedging
activities; discrepancies between actual and estimated production,
between actual and estimated reserves and resources or between actual
and estimated metallurgical recoveries; costs of production; capital
expenditure requirements; the costs and timing of construction and
development of new deposits; and the success of exploration and
permitting activities. In addition, the factors described or referred
to in the section entitled 'Risk Factors' in Northgate's Annual
Information Form for the year ended December 31, 2009 or under the
heading 'Risks and Uncertainties' in Northgate's 2009 Annual Report,
both of which are available on the SEDAR website at www.sedar.com, should be reviewed in conjunction with the information found in this
press release. Although Northgate has attempted to identify important
factors that could cause actual results, performance or achievements to
differ materially from those contained in forward-looking information,
there can be other factors that cause results, performance or
achievements not to be as anticipated, estimated or intended. There can
be no assurance that such information will prove to be accurate or that
management's expectations or estimates of future developments,
circumstances or results will materialize. Accordingly, readers should
not place undue reliance on forward-looking information. The
forward-looking information in this press release is made as of the
date of this press release, and Northgate disclaims any intention or
obligation to update or revise such information, except as required by
applicable law.
Cautionary Note to US Investors Regarding Mineral Reporting Standards:
Northgate prepares its disclosure in accordance with the requirements of
securities laws in effect in Canada, which differ from the requirements
of U.S. securities laws. Terms relating to mineral resources in this
press release are defined in accordance with National Instrument
43-101-Standards of Disclosure for Mineral Projects under the
guidelines set out in the Canadian Institute of Mining, Metallurgy, and
Petroleum Standards on Mineral Resources and Mineral Reserves. The
Securities and Exchange Commission (the 'SEC') permits mining
companies, in their filings with the SEC, to disclose only those
mineral deposits that a company can economically and legally extract or
produce. The Company uses certain terms, such as, 'measured mineral
resources' 'indicated mineral resources', 'inferred mineral resources'
and 'probable mineral reserves', that the SEC does not recognize (these
terms may be used in this press release and are included in the
Company's public filings which have been filed with securities
commissions or similar authorities in Canada).
_________________________
(1) See press release dated January 25, 2010.
To view this news release in HTML formatting, please use the following URL: http://www.newswire.ca/en/releases/archive/May2011/26/c7475.html
Ms. Keren R. Yun
Director, Investor Relations
Tel: 416-216-2781
Email: ngx@northgateminerals.com