Northgate Minerals Intersects 5.44 Grams per Tonne Gold over 54.0 Metres at Young-Davidson
05 10월 2011 - 8:30AM
PR Newswire (Canada)
Exploration Success Continues on Both Flanks of Existing
Young-Davidson Reserve VANCOUVER, Oct. 4, 2011 /CNW/ - Northgate
Minerals Corporation 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 announced(1). 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 zone(1), 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 YMX11-01returned 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 YMX11-02confirmedthat 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 min 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 reserve(2). 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 | To | Interval | Estimated | Gold | Gold Cut | | |
(m) | (m) | (m) | True |Uncut | 20 g/t | | | | | | Thickness |(g/t)
| | | | | | | (m) | | |
|__________|________|________|__________|___________|______|__________|
|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 | To | Interval | Estimated | Gold | Gold Cut | | |
(m) | (m) | (m) | True |Uncut | 20 g/t | | | | | | Thickness |(g/t)
| | | | | | | (m) | | |
|_________|______|_______|__________|___________|______|__________|
|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 | Mine | Elevation | Azimuth | Dip | Depth| | |
Easting | Northing | (m) | | | (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 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. 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
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 September 15, 2011 (2 )See
press release dated January 25, 2010 Northgate
Minerals Corporation CONTACT: Ms. Keren R. Yun, Director, Investor
RelationsTel: 416-216-2781Email: ngx@northgateminerals.com Website:
www.northgateminerals.com
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