Northgate Minerals Intersects Two Major Intervals in the YD West Zone at Young-Davidson
August 25 2011 - 8:05AM
PR Newswire (Canada)
VANCOUVER, Aug. 25, 2011 /CNW/ -- 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 reserve(1) 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). o The hole contains a higher
grade section of 6.49 g/t over 27.5 m. o 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. o 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. o 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. o 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. o 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
_________________________________________________________ | | From
| To |Interval| True |Gold |Gold Cut| |Hole ID | (m) | (m) | (m)
|Thickness|Uncut| 20 g/t | | | | | | (m) |(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
____________________________________________________________ | |
From | To |Interval| True |Gold | Gold Cut | |Hole ID | (m) | (m) |
(m) |Thickness|Uncut| 20 g/t | | | | | | (m) |(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. To view
this news release in HTML formatting, please use the following URL:
http://www.newswire.ca/en/releases/archive/August2011/25/c6102.html
p align="justify" bMs. /bbKeren R. Yun/bbr/ bDirector,
Investor Relations/bbr/ bTel: 416-216-2781/bbr/ bEm/bbail: /ba
href="mailto:ngx@northgateminerals.com"ngx@northgateminerals.com/ab /b
/p
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