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Northgate Minerals Intersects Two Major Intervals in the YD West Zone at Young-Davidson
Hole YD11-242 Intersects 5.30 g/t gold over 44.1 m and
Hole YD11-240A Intersects 2.67 g/t gold over 193.0 m
VANCOUVER, Aug.
25, 2011 /CNW/ - Northgate Minerals Corporation (TSX:
NGX) (NYSE Amex: NXG) is pleased to report that Hole YD11-242 in the YD
West zone intersected 5.30 grams per tonne ("g/t") gold over
44.1 metres (m) (estimated true thickness is 30.0 m), including 6.49
g/t over 27.5 m.
Hole YD11-240A, an oblique hole drilled at an
approximate 45°angle to the zone, returned 2.67 g/t over 193.0 m
(estimated true thickness is 48.3 m).
The YD West zone is located just
west of the currently known 2.8 million ounce reserve1 at Young-Davidson in northern Ontario.
Production of the Young-Davidson
mine is scheduled to commence in 2012.
The YD West zone continues to expand since Discovery Hole YD10-198
intersected 3.46 g/t over 79.5 m last year. Additional intersections
have returned some of the highest-grade intervals ever drilled on the
property, including Hole YD11-234B, which returned 4.31 g/t gold over
79.6 m (see press release dated June 7, 2011). The most recent
intervals, YD11-242 and 240A, confirm the highly prospective YD West
zone hosting a thick auriferous horizon.
Holes YD11-242 and 240A Highlights
-
Hole YD11-242 returned 5.30 g/t gold over 44.1 m (estimated 30.0 m true thickness).
-
The hole contains a higher grade section of 6.49 g/t over 27.5 m.
-
The hole is located about 65 m below and 50 m east of Hole YD11-234B.
-
Hole YD11-240A, an oblique hole, returned 2.67 g/t gold over 193.0 m.
-
The hole contains two higher grade sections of 4.32 g/t over 9.0 m and
5.08 g/t over 6.8 m.
-
The hole includes a 21 m section of a post-mineral diabase dyke.
The
entire intersection (with the dyke removed) grades 2.99 g/t gold over
172.0 m.
-
This new intersection is oblique to the zone as the hole was designed to
test both the attitude of the post mineral dykes and the continuity of
the zone between the dykes. The intersection suggests the zone is
continuous for at least 190 m down dip.
-
Holes YD11-240A and YD11-242 are both very significant intersections and
will be utilized to perform a resource estimation in the fall.
These
reported holes also demonstrate the continuity of the YD West zone,
which remains open down dip and to the west.
-
Two diamond drills continue to explore in this area.
An additional
underground exploration drill has been mobilized to the property to
test below the UBZ zone, located both below and east of current
reserves.
"With the most recent drill results, we are confident the YD West zone
will add significant resources to the property, as many of the holes
have returned higher than average reserve grade" commented Richard
Hall, President and CEO of Northgate.
"As production from the
Young-Davidson mine is scheduled to commence in 2012, we look forward
to completing a resource estimation of this new zone, which could
increase the mines average annual production or extend the initial
15-year mine-life."
Diamond Drill Program
The purpose of the 2011 diamond drill program on the west flank of the
Young-Davidson deposit is to explore for new resources west of a major
north-south trending diabase dyke that appeared to have truncated and
displaced the zone. Northgate resolved the fault displacement with
Discovery Hole YD10-198.
To date, nine holes have intersected the YD
West zone and all but one has returned ore-grade intersections (see
Figures 1 & 2 and Tables 1 & 2).
In order to perform a geologically accurate resource estimation,
Northgate drilled a perpendicular (oblique) hole, YD11-240A, relative
to the exploration holes in the zone to resolve the location and
correlation of the north-south trending post-mineral diabase dyke.
The
hole traversed the post-mineral dyke approximately midway through the
YD West zone.
The geological information from this hole will be very
useful in modeling both the dykes and the zone itself.
Hole YD11-242 was completed in an area where we required a pierce point
in the zone between a thick intersection in YD11-234B and hole
YD11-234A (1.22 g/t over 13.4 m), which appeared to have a significant
portion of mineralization replaced by a post-mineral dyke.
Hole
YD11-242 intercepted mineralization midway between 234B and 234A and
returned 5.30 g/t gold over 44.1 m.
This hole confirms the continuity
of the YD West zone and suggests that a significant portion of
mineralization in hole 234A was indeed replaced by a post-mineral dyke.
The new YD West intersections are considered significant and confirm the
continuity of the zone.
The YD West zone has excellent potential to add
significant gold resources to the project.
Two diamond drills will
continue to focus in this area until the end of the year.
Overview of Young-Davidson Exploration Area
Gold mineralization on the Young-Davidson property is present primarily
in an intrusive syenite host rock dipping at approximately 70 degrees
to the south.
Figure 1 illustrates a longitudinal view of the YD West
zone with current reserves illustrated in dark red to the east.
Figure 1 - YD West Zone-Longitudinal Section
http://www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDFig1-Aug2011.jpg
Figure 2 - 9300m Level Plan
http://www.northgateminerals.com/Theme/Northgate/files/Releases/2011/YDFig2-Aug2011.jpg
Figure 2 presents a level plan (horizontal slice) of the propertys
geology immediately adjacent to the main Young-Davidson reserves.
The
currently defined reserves terminate against the brown diabase dyke
that was the western limit of the reserve.
The holes shown on the level
plan are projected either 75 m up dip or 225 m down dip to the 9300 m
level and clearly demonstrate that the younger diabase dyke occupies a
fault with an apparent offset of 50 m to 100 m to the north on the
western side of the dyke.
The actual displacement on the fault is to
the north, downwards or a combination of the two.
Table 1: Assay Results from YD West Zone
Hole ID
|
From
(m)
|
To
(m)
|
Interval
(m)
|
True
Thickness
(m)
|
Gold
Uncut
(g/t)
|
Gold Cut
20 g/t
|
YD11-242
|
1239.0
|
1283.1
|
44.1
|
30.0
|
5.30
|
4.80
|
|
1248.5
|
1276.0
|
27.5
|
18.7
|
6.49
|
5.69
|
|
|
|
|
|
|
|
YD11-240A
|
1135.0
|
1328.0
|
193.00
|
48.3
|
2.67
|
2.67
|
incl
|
1135.0
|
1256.2
|
121.20
|
30.3
|
2.79
|
2.79
|
incl
|
1159.0
|
1195.0
|
36.00
|
9.0
|
4.32
|
4.32
|
incl
|
1277.2
|
1328.0
|
50.80
|
12.7
|
3.48
|
3.48
|
incl
|
1277.2
|
1304.5
|
27.30
|
6.8
|
5.08
|
5.08
|
Table 2: Previous Assay Results from YD West Zone
Hole ID
|
From
(m)
|
To
(m)
|
Interval
(m)
|
True
Thickness
(m)
|
Gold
Uncut
(g/t)
|
Gold Cut
20 g/t
|
YD11-234B
|
1064.8
|
1144.4
|
79.60
|
55.0
|
4.31
|
4.21
|
incl
|
1094.5
|
1144.4
|
49.90
|
34.4
|
5.66
|
5.51
|
incl
|
1128.0
|
1142.9
|
14.90
|
10.3
|
10.62
|
10.10
|
|
|
|
|
|
|
|
YD11-234A
|
1202.6
|
1221.8
|
19.20
|
13.4
|
1.22
|
1.22
|
|
|
|
|
|
|
|
YD11-234
|
1216.9
|
1234.7
|
17.80
|
9.5
|
4.37
|
4.37
|
incl
|
1217.8
|
1226.1
|
8.30
|
4.4
|
6.82
|
6.82
|
|
|
|
|
|
|
|
YD10-198
|
1258.0
|
1337.5
|
79.5
|
53.5
|
3.46
|
3.46
|
|
|
|
|
|
|
|
YD10-198A
|
1333.7
|
1355.0
|
20.20
|
14.2
|
6.31
|
5.42
|
|
|
|
|
|
|
|
YD10-198B
|
1353.5
|
1364.4
|
10.9
|
7.7
|
5.43
|
5.43
|
|
|
|
|
|
|
|
YD10-226A
|
1097.3
|
1134.0
|
36.7
|
25.3
|
0.74
|
0.74
|
|
1115.1
|
1125.5
|
10.4
|
7.2
|
1.19
|
1.19
|
|
|
|
|
|
|
|
YD11-239
|
Target zone occupied by diabase dyke ("dyked out")
|
* * * * * * *
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 21, 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.
* * * * * * *
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
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 January 25, 2010.
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