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 mine's 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 property's 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 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, 2010 or under
the heading "Risks and Uncertainties" in Northgate's 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 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 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 Corporation's public filings which have been filed with
securities commissions or similar authorities in Canada).
1 See press
release dated January 25, 2010.
|