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Northgate Minerals Intersects 5.44 Grams per Tonne Gold over 54.0 Metres at Young-Davidson
Exploration Success Continues on Both Flanks of Existing Young-Davidson
Reserve
VANCOUVER, Oct.
4, 2011 /CNW/ - Northgate Minerals Corporation (TSX:
NGX) (NYSE Amex: NXG) is pleased to announce assay results recently
received from four diamond drill holes completed at Young-Davidson.
Two
of these holes were drilled in the YD West zone, where a new Indicated
and Inferred Resource estimate of 536,000 and 53,000 ounces,
respectively, was recently announced1.
Drill results from these two holes (approximate widths of
30 metres ("m")), have enlarged this zone with a higher average grade
than the main Young-Davidson deposit.
The other two holes have slightly
expanded the Upper Boundary Zone reserve ("UBZ") and highlight the
potential of a new footwall zone, the YMX Footwall, that may provide
another underground mining front on the property.
YD West Highlights
Following on the new resource estimate at the YD West zone1, there are two additional holes for which assay results are now
available:
-
Hole YD11-244, drilled south to north, returned an intersected width of 54.0 m grading 5.44 grams per tonne ("g/t") gold, including 48.3 m grading 5.99 g/t.
-
Hole YD11-243A, an oblique hole completed in the upper portion of the YD West zone,
returned 2.68 g/t over 31.2 m east of a post mineral dyke and 4.60 g/t gold over 39.2 m west of the same dyke.
The average of these intersections with the dyke
removed is 3.75 g/t gold over 70.4 m.
-
Two diamond drills continue to explore in the YD West zone.
It is expected that the results from these two holes will positively
impact the recently announced YD West resource when it is updated at
the end of the year.
Underground Exploration Highlights
Underground exploration drilling initiated in mid-2011 focused on the
down dip extension of the UBZ and other targets to the east of the
existing Young-Davidson reserve. This drilling was conducted from an
underground access located 150 m in the footwall and beneath the target
UBZ. While the intent was to step-out down dip from the UBZ, the first
hole flattened excessively, intersecting the lower section of the UBZ
reserve.
-
Hole YMX11-01 returned 3.07 g/t gold over 54.2 m, including 3.31 g/t gold over 45.3 m in the UBZ, indicating the zone at this location is up to 30 m wider
than previously modeled.
-
Hole YMX11-02 confirmed that the UBZ has a depth extent as modeled in the reserve and does not
continue below the 9550 m elevation.
YMX Footwall Zone
A benefit of drilling YMX holes from underground in a north to south
orientation (i.e.
from the footwall side of the existing deposit, as
opposed to from the hanging wall side where almost all of the previous
surface-based exploration drilling took place) is that the footwall of
the currently known Young-Davidson deposit becomes better explored.
In this instance, a potentially significant zone of continuous
mineralization (YMX Footwall), which was previously interpreted as only
isolated intersections, has been identified.
-
Hole YMX11-01 also returned 3.53 g/t gold over 12.0 m in the YMX Footwall.
-
Hole YMX11-02, drilled approximately 50 m down dip from the first hole, returned 5.89 g/t over 16.1 m in the YMX Footwall.
-
These two new holes, in conjunction with six historic intercepts,
suggest the YMX Footwall zone is a continuous area of mineralization
with a thickness of approximately 10 m and an east-west strike length
of up to 250 m with a similar vertical extent up and down dip.
The potential new zone, which is not yet included in resources or
reserves on the property, is located approximately 75 m north of and
parallel to one of the main reserve areas of the 2.8 million ounce
Young-Davidson reserve2.
Given its close proximity to current mine development, its near vertical
orientation, its grade and thickness, the YMX Footwall zone has the
potential to provide another underground mining front for the
Young-Davidson mine, which commences production in 2012.
"Our exploration program at Young-Davidson continues to yield
exceptional results," commented Richard Hall, President and CEO of
Northgate.
"The two new results from YD West bolster the recently
released resource, while the YMX Footwall zone could become our second
new gold resource area identified outside of current reserves at
Young-Davidson in the past 14 months.
The close proximity of the YMX
Footwall to our existing mine infrastructure means the zone has the
potential to provide an additional underground mining front to feed the
Young-Davidson mill, which has the capacity to process substantially
more than the 6,000 tonnes per day that was outlined in the Feasibility
Study.
The exciting results from the YMX Footwall, combined with the
nearly 600,000 ounces recently reported at YD West, mean that we could
realize an additional one million ounces of resources on the property
from our 2011 drill program."
Overview of Young-Davidson Exploration Area
YD West Diamond Drill Program
Additional drilling on the YD West zone continues to return excellent
results.
Hole YD11-243A, an oblique hole, was designed to test the
orientation of the post mineral dykes as well as the zone itself, and
hole YD11-244 was drilled in a conventional direction from south to
north to test the zone.
Geologic contact information for both holes
were used to constrain the dyke model in the YD West resource estimate;
however, assay results were pending at the time of the release so were
not used in the resource estimate.
Two diamond drills continue to test
the limits of the YD West zone, which contains an Indicated and
Inferred Resource of 536,000 and 53,000 ounces, respectively.
Underground Diamond Drill Program
The purpose of the 2011 underground diamond drill program was to test if
the main UBZ reserve extended further down dip and to explore other
targets to the east of the main Young-Davidson reserve.
The drilling
reported herein indicates that while the main UBZ reserve does not
extend much further down dip, the zone is considerably wider at depth
than the 2008 interpretation (see Figure 2).
Both holes YMX11-01 and 02 were drilled from new underground mine
workings from the footwall side of the deposit towards the hanging
wall.
Previous holes from surface were drilled from the hanging wall
towards the footwall and most holes stopped once they exited the
primary UBZ and, as such, did not encounter any mineralization in the
footwall.
The database for the 2008 resource estimate included six
holes in this area that had gold bearing intervals in the footwall;
however, their continuity was unknown, so they were not modeled as
resource.
Holes YMX11-01 and 02 confirm the potential that a mineable
resource may be present between the new mine development work and the
UBZ.
Follow-up drilling will be performed as part of the underground
delineation drilling program.
Figure 1: Young Davidson Longitudinal Section (looking north)
http://www.northgateminerals.com/Theme/Northgate/files/Releases/2011/Figure1.jpg
Figure 1 illustrates a longitudinal view with the location of drill
holes 243A and 244 within the YD West zone and holes YMX11-01 and 02
within the YMX Footwall.
Figure 2: Cross Section 23680mE
http://www.northgateminerals.com/Theme/Northgate/files/Releases/2011/Figure2.jpg
Figure 2 presents a geologic sectional view (north-south vertical slice)
on easting 23680mE.
The main UBZ and its potentially en echelon, or
stepping, YMX Footwall zone are presented on the section, as well as
drill holes YMX11-01 and 02 and all historic drill holes within the 50
m window.
Figure 3 - YD West Zone-Longitudinal Section
http://www.northgateminerals.com/Theme/Northgate/files/Releases/2011/Figure3.jpg
Figure 3 presents a longitudinal section specific to the YD West Zone
area. Highlighted in yellow are the YD11-243A intercepts on both the
east and west side of a post mineral dyke.
Table 1: Assay Results from the YD West Zone
Hole ID
|
From
(m)
|
To
(m)
|
Interval
(m)
|
Estimated
True
Thickness (m)
|
Gold Uncut
(g/t)
|
Gold Cut
20 g/t
|
YD11-243A
|
888.9
|
907.0
|
18.1
|
5.8
|
1.0
|
1.0
|
|
|
|
|
|
|
|
|
930.5
|
961.7
|
31.2
|
10.0
|
2.68
|
2.68
|
incl
|
942.2
|
961.7
|
19.5
|
6.5
|
3.62
|
3.62
|
|
|
|
|
|
|
|
|
1045.8
|
1085.0
|
39.2
|
12.0
|
4.60
|
4.60
|
|
|
|
|
|
|
|
YD11-244
|
1313.5
|
1367.5
|
54.0
|
31.5
|
5.44
|
4.56
|
|
1319.2
|
1367.5
|
48.3
|
28.3
|
5.99
|
5.01
|
|
1329.6
|
1350.5
|
20.9
|
12.2
|
10.02
|
7.76
|
Table 1: Assay Results from the YMX Footwall Zone
Hole ID
|
From
(m)
|
To
(m)
|
Interval
(m)
|
Estimated
True
Thickness (m)
|
Gold Uncut
(g/t)
|
Gold Cut
20 g/t
|
YMX11-01
|
99.0
|
110.0
|
12.0
|
11.1
|
3.53
|
3.53
|
|
|
|
|
|
|
|
|
177.3
|
231.5
|
54.2
|
51.1
|
3.07
|
3.07
|
incl
|
183.5
|
231.5
|
48.0
|
45.3
|
3.31
|
3.31
|
|
|
|
|
|
|
|
YMX11-02
|
133.9
|
150.0
|
16.1
|
10.0
|
5.89
|
5.89
|
Table 3: Drill Collar Locations YD West Zone and YMX Footwall
Hole ID
|
Mine
Easting
|
Mine
Northing
|
Elevation
(m)
|
Azimuth
|
Dip
|
Depth (m)
|
YMX11-01
|
23657
|
10527
|
9692
|
170
|
-30
|
315
|
YMX11-02
|
23657
|
10527
|
9692
|
170
|
-45
|
387
|
|
|
|
|
|
|
|
YD11-243A
|
22853
|
10255
|
10333
|
285
|
-72
|
1368
|
YD11-244
|
22441
|
9843
|
10382
|
351
|
-72
|
1521
|
* * * * * * *
Quality Control - Analyses and Sample Location
Details of quality assurance/quality control procedures for sample
analysis and drill hole survey methodology are reported in detail in
the Canadian National Instrument 43-101 Standards of Disclosure for
Mineral Projects ("NI 43-101") compliant Technical Report filed on
SEDAR (www.sedar.com) on August 28, 2009.
Qualified Persons
The program design, implementation, quality assurance/quality control
and interpretation of the results are under the control of Northgates
geological staff, which includes a number of individuals who are
qualified persons as defined under NI 43-101.
Carl Edmunds, PGeo,
Northgates Exploration Manager, is responsible for the overall
supervision of the program. Mr.
Edmunds is a member of the Association
of Professional Engineers, Geologists and Geophysicists of British
Columbia and a member of the Association of Professional Geoscientists
of Ontario and has 23 years of experience in mineral resource
estimation.
* * * * * * *
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 the Americas and Australia.
Northgate currently owns and operates the Fosterville and Stawell gold
mines in Victoria Australia, and is building the Young-Davidson gold
mine in northern Ontario, which is scheduled to commence production in
2012.
* * * * * * *
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
Northgates future financial or operating performance and other
statements that express managements 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 Northgates 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 Northgates Annual
Information Form for the year ended December 31, 2010 or under the
heading "Risks and Uncertainties" in Northgates 2010 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
managements 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 US 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 Corporation 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
Corporations public filings which have been filed with securities
commissions or similar authorities in Canada).
1 See press release dated September 15, 2011
2 See press release dated January 25, 2010
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