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Osisko Mining Corp.

Publié le 14 décembre 2009

Releases New Resource Estimate for Canadian Malartic Project

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Press Release

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OSISKO RELEASES NEW RESOURCE ESTIMATE FOR
CANADIAN MALARTIC PROJECT


Global M&I resource increased by 1.28 million ounces gold

Montreal, Quebec, December 14, 2009 - Osisko Mining Corporation (OSK: TSX, EWX: Deutsche Boerse) is pleased to provide an updated resource estimate for its 100%-owned Canadian Malartic project. This new estimate includes the combined, previously-reported resources of the Canadian Malartic deposit and the South Barnat deposit, as well as additional resources defined from ongoing drilling within the previously estimated pit shells and immediately southeast of the pit shells.

Key points:

� Global Measured and Indicated (�M&I�) resource is now 11.20 million ounces gold, up 1.28 million ounces from the total of previously released resources. Additional 470,000 ounces remains in the inferred category.

� Tot al in-pit M&I resource is now 9.17 million ounces at a grade of 1.20 grams per tonne gold, based on a Whittle-optimized pit shell using a gold price of US$825 per ounce and a corresponding lower cut-off grade of 0.34 grams per tonne gold. This represents an increase of 770,000 ounces gold over the total of previous in-pit M&I resource estimates released by Osisko.

� At a US$1100 per ounce gold price, the in-pit M&I resource increases to 10.37 million ounces at an average grade of 1.05 grams per tonne gold, adding more than one million ounces compared to the US$825 pit shell.

� At a conservative lower cut-off of 1 gram per tonne, the in-pit M&I resource is a robust 6.72 million ounces at a grade of 1.85 grams per tonne gold.

� The infill drilling between the Canadian Malartic and South Barnat deposits has been successful in joining the two deposits, allowing for a single pit design to evaluate both deposits. The mineralized system is still open at depth.

� Economic valuation within an optimized engineered pit design will be provided in an updated reserve statement for the entire project by the end of January 2010, which will include revised mining scheduling and stockpiling aimed at maximizing head grade in the early years of production.

� The current mine schedule, as indicated in the previously released Feasibility Study, only includes 6.28 million ounces of reserves at a grade of 1.07 grams per tonne gold.

Belzile Solutions Inc. of Rouyn-Noranda, Qu�bec ("BSI") are the independent resource estimate consultants for Osisko, and have authorized the release of the following estimates. The global Measured and Indicated (�M&I�) resource is 11.20 million ounces of gold at an average undiluted grade of 1.10 g/t Au, with an additional 0.47 million ounces gold at an average grade of 0.73 g/t Au in the Inferred category, based on a lower cut-off grade of 0.34 g/t Au. The tables below summarize the BSI estimates using variable lower cut-off grades:

Canadian Malartic Project global resource estimates

Measured

Indicated

 

TotalM&I

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

Cut-off�� (g/t)

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

0.93

33.5

1.00

1.12

282.7

10.20

0.34

1.10

316.2

11.20

1.09

25.5

0.89

1.33

219.2

9.35

0.50

1.30

244.7

10.25

1.21

21.0

0.81

1.45

189.4

8.83

0.60

1.43

210.4

9.64

1.33

17.1

0.73

1.56

166.3

8.35

0.70

1.54

183.4

9.08

1.46

14.1

0.66

1.66

148.5

7.92

0.80

1.64

162.6

8.58

1.58

11.8

0.60

1.75

133.4

7.50

0.90

1.74

145.1

8.10

1.70

9.9

0.54

1.84

120.5

7.11

1.00

1.83

130.3

7.65

 

Inferred

 

Grade�� (g/t)

Tonnes�� (M)

Oz(M)

Cut-off�� (g/t)

0.73

20.0

0.47

0.34

0.97

11.5

0.36

0.50

1.12

8.5

0.31

0.60

1.30

6.2

0.26

0.70

1.46

4.8

0.22

0.80

1.63

3.8

0.20

0.90

1.79

3.1

0.18

1.00


BSI, in collaboration with G Mining Services Inc. of Montreal, also estimated an in-pit M&I resource within a single Whittle-optimized pit shell using a base case gold price of US$825 per ounce. The combined in-pit M&I resource for the Canadian Malartic and South Barnat deposits is 9.17 million ounces of gold at an average undiluted grade of 1.20 g/t Au, with an additional 0.11 million ounces gold at an average grade of 0.90 g/t Au in the inferred category, based on a derived lower cut-off grade of 0.34 g/t Au. The tables below summarize the in-pit estimates using variable lower cut-off grades:

Canadian Malartic Project resource estimates within US$825 Whittle pit shell

Measured

Indicated

 

TotalM&I

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

Cut-off�� (g/t)

Grade�� (g/t)

Tonnes�� (M)

Oz

(M)

0.97

27.5

0.86

1.23

210.6

8.31

0.34

1.20

238.1

9.17

1.13

21.4

0.78

1.40

174.2

7.82

0.50

1.37

195.6

8.60

1.25

17.6

0.71

1.51

154.3

7.47

0.60

1.48

172.0

8.18

1.38

14.5

0.65

1.61

138.0

7.13

0.70

1.59

152.6

7.78

1.50

12.2

0.59

1.70

125.3

6.83

0.80

1.68

137.5

7.42

1.62

10.3

0.54

1.78

114.1

6.52

0.90

1.77

124.5

7.06

1.75

8.7

0.49

1.86

104.4

6.23

1.00

1.85

113.1

6.72

 

Inferred

 

Grade�� (g/t)

Tonnes�� (M)

Oz(M)

Cut-off�� (g/t)

0.90

3.8

0.11

0.34

1.05

2.9

0.10

0.50

1.18

2.3

0.09

0.60

1.31

1.8

0.08

0.70

1.42

1.6

0.07

0.80

1.55

1.3

0.06

0.90

1.67

1.1

0.06

1.00


Sensitivity of the in-pit M&I resource to gold price is as follows (inferred excluded):

Gold Price (US$)

Grade (g/t)

Tonnes (M)

Oz(M)

Strip Ratio

(Waste/Ore)

$700

1.31

195.8

8.25

2.01

$825

1.20

238.1

9.17

1.91

$900

1.15

255.8

9.48

1.84

$1000

1.09

287.8

10.07

1.81

$1100

1.05

308.0

10.37

1.76

Using an ore-based cost of US$6.38 per tonne (as estimated from costs in the Canadian Malartic Feasibility Study), the corresponding in-pit cut-off grade for the base case US$825/oz Whittle shell is 0.34 g/t gold, giving the resource distribution shown in the following table:

Distribution of Canadian Malartic Project resource estimates using base case
US$825 Whittle pit shell with a 0.34 g/t Au lower cut-off grade

 

TotalM&I

Inferred

 

Grade (g/t)

Tonnes (M)

Oz(M)

Grade (g/t)

Tonnes (M)

Oz(M)

Global

1.10

316.2

11.20

0.73

20.0

0.47

(In-Pit CM)

1.08

198.9

6.88

0.77

2.9

0.07

(In-Pit Barnat)

1.82

39.3

2.30

1.36

0.9

0.04

In-Pit Total

1.20

238.1

9.17

0.90

3.8

0.11

Out-of-Pit

0.81

78.1

2.03

0.69

16.2

0.36

Sean Roosen, President and CEO of Osisko, commented: �We are very pleased with the new pit-constrained M&I resource estimate for the Canadian Malartic Project, which has achieved an increase of 770,000 ounces of gold with respect to the total of previous estimates, while maintaining a relatively low strip ratio of 1.91. The new in-pit M&I resource estimate of 9.17 million ounces is very reliable since it is based on processing and mining costs that were used in the Feasibility Study.�

�We anticipate that over 95% of this resource is going to be converted into reserves for the entire project, once a new reserve estimate is calculated in January 2010. We anticipate that the new engineered pit will provide a significant increase in mine life and allow for mining sequencing and stockpiling aimed at increasing head grade and overall gold production in the early years in order to accelerate pay back of capital.

Finally, it is worth noting that even at a cut-off of 1 g/t Au, we are now looking at a total in-pit M&I resource of 6.72 million ounces gold at an average grade of 1.85 g/t Au, which makes this resource very robust at significantly lower gold prices. This means that 73 percent of the overall 9.17 million ounce in-pit resource should have an average grade 1.85 g/t Au. In the business of open pit gold mining, this is a relatively high grade disseminated deposit with a surrounding low grade halo. It lowers commodity-driven business risk significantly by allowing for mining flexibility.�

Details on the parameters of the resource estimates are as follows:

� The database comprised a total of 228,500 metres of drilling obtained from historical drilling (Canadian Malartic Mines and Lac Minerals) and from approximately 561,200 metres of drilling completed and assayed by Osisko as of the end of September 2009 on a maximum 30 m x 30 metre grid. (All NQ or HQ core assays reported by Osisko were obtained by standard 50 g fire assaying-AA finish or gravimetric finish at ALS Chemex laboratories in Val d'Or, Quebec.)

� The database also comprised a total of 525,105 assays with an average of 1.38 metre per sample for a total of 726,500 assayed metres.

� The estimates were done using Ordinary Kriging (OK) as the geostatistical interpolation method based on 5.0 metre analytical composites. Resources were also estimated using Inverse Distance Squared (ID2) interpolation, which produced similar results, i.e. less than 2 percent difference in total ounces at all cut-offs.

� Calculations are based on original samples cut to a maximum of 10 g/t to 70 g/t Au depending on the domain. This resulted in an approximate 1.7 percent reduction in the overall gold content. All 5m composites are calculated based on cut original data.

� Testing and validation of cut historical Canadian Malartic (CM) drill data using modern (Osisko) drill data revealed negligible bias in the higher grade domains but significant bias (minimum 25%) in the lower grade domains. CM historical data in lower grade domains were therefore discarded for resource estimate and resource classification purposes. CM historical data were used for resource estimate purposes in the higher grade domains but not retained for measured resource classification. Lac Minerals drill core was mostly re-assayed and these data were retained for resource estimate and resource classification purposes.

� All estimates are based on a Parent Cell dimension of 20 metres E, 10 metres N and 10 metres height with estimation parameters determined by variography.

� Geological interpretation identified fourteen high grade domains (higher than 1.0 g/t Au) , six low grade domains (between 0.4 and 1.0 g/t Au) and a broad lower grade envelope (greater than 0.2 g/t Au).

� Underground voids were modeled from historical mine plans and adjusted according to positions of drill intersections in stopes and drifts. Void volumes of stopes were increased by one metre along all edges to compensate for uncertainties. The void models were then used to deplete the resource estimate. All samples located within the voids were then removed from the estimate.

� Tonnage estimates are based on rock densities of 2.69 tonnes/cubic metre for the porphyry, 2.75 for altered sediments and 2.90 for altered ultramafic rocks.

� The resource estimates using the lower cut-off of 0.34 g/t Au is emphasized for reporting purposes as this is the in-pit cut-off estimated for the US$825 Whittle shell.

� The US$825 Whittle shell has approximate maximum dimensions of 2,980 metres in length, 1,180 metres in width and a v ertical depth of 380 metres.

� The average gold recovery in this pit shell is 86.2%. Overall slope angles based on feasibility level geotechnical studies (including provisions for ramps) are between 43 and 55 degrees. Strip ratio is 1.91 for the in-pit resource corresponding to a lower cut-off of 0.34 g/t Au.

Economic valuation within an optimized engineered pit design will be provided in an updated reserve statement for the entire project by the end of January 2010, which will optimize the combined Canadian Malartic and South Barnat pits. Should Osisko successfully prove up economic reserves at South Barnat, additional steps will be taken to obtain the necessary authorizations to mine the South Barnat deposit and integrate it to the Canadian Malartic project. Additional studies are currently under way to evaluate the deviation of highway 117 that will be required for potential mining of the South Barnat deposit. This study will be carried out in cooperati on with the Qu�bec Ministry of Transport and the town of Malartic. The goal of the study will be to minimize the portion of the highway to be relocated as well as the social impact to the community.

The project out-of-pit M&I resource is currently estimated at 2.03 million ounces gold, and further pit optimizations using modified variables, such as increased pit slopes or gold price, may allow for eventual inclusion of some of this resource within the pit. Additional drilling is required to upgrade the remaining inferred resources.

Osisko Mining Corporation is currently developing the Canadian Malartic gold project into a large-scale open pit, bulk-tonnage mining operation. The Company is well-funded with $825 million in cash resources and is carrying out an aggressive mine development, reserve definition and exploration campaign. The Canadian Malartic deposit currently represents one the biggest gold reserves in Canada for a single deposit, and is still growing through ongoing drilling on new mineralized zones.

A NI 43-101 compliant, 7.7 million ounce gold M&I global resource estimate (6.4 million ounce gold M&I in-pit resource) on the main Canadian Malartic gold deposit was released on September 8, 2008 and has been filed on SEDAR.  A NI 43-101 compliant, 6.3 million ounce gold Reserve estimate and Feasibility Study on the main Canadian Malartic gold deposit was released on November 25, 2008 and has been filed on SEDAR. A NI 43-101 compliant, 2.2 million ounce gold M&I global resource estimate (2.0 million ounces gold M&I in-pit resource) on the South Barnat gold deposit was released on June 2, 2009 and has been filed on SEDAR.

Mr. Elz�ar Belzile, P. Eng. of BSI, Mr. Louis-Pierre Gignac, P. Eng. of G Mining Services Inc. and Mr. Robert Wares, P. Geo. and Executive Vice-President of Osisko, are the Qualified Persons who have reviewed this news release and are responsible for the technical information reported herein, including verification of the data disclosed.

Conference Call

Osisko will host a conference call on Monday, December 14 at 11:30 AM Montreal time, where senior management will discuss the press release and will be available to respond to questions from analysts and investors. Thos e interested in participating in the conference call should dial in at 416-981-9000 (Toronto local and international), or 1-800-909-4145 (North American toll free). An operator will direct participants to the call.

THIS PRESS RELEASE CONTAINS A MAP,
CLICK HERE TO VIEW THE FULL DOCUMANT IN PDF FORMAT

Cautionary Notes Concerning Estimates of Mineral Resources

This news release uses the terms measured, indicated and inferred resources as a relative measure of the level of confidence in the resource estimate. Readers are cautioned that mineral resources are not economic mineral reserves and that the economic viability of resources that are not mineral reserves has not been demonstrated. In addition, inferred resources are considered too geologically speculative to have any economic considerations applied to them. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. Under Canadian rules, estimates of inferred mineral resources may not form the basis of feasibility or pre-feasibility studies or economic studies except for Preliminary Assessment as defined under NI 43-101. Readers are cautioned not to assume that that further work will lead to mineral reserves that can be mined economicall y.

Forward Looking Statements

Certain statements contained in this press release may be deemed �forward-looking statements�. All statements in this release, other than statements of historical fact, that address events or developments that the Corporation expects to occur, are forward looking statements.  Forward looking statements are statements that are not historical facts and are generally, but not always, identified by the words �expects�, �plans�, �anticipates�, �believes�, �intends�, �estimates�, �projects�, �potential�, �scheduled� and similar expressions, or that events or conditions �will�, �would�, �may�, �could� or �should� occur.  Although the Corporation believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, including, without limitation that all technical, economical and financial conditions will be met in order to put the Canadian Malartic Proje ct into commercial production, such statements are not guarantees of future performance and actual results may differ materially from those in forward looking statements.  Factors that could cause the actual results to differ materially from those in forward-looking statements include gold prices, access to skilled consultants, mining development and mill production personnel, results of exploration and development activities, the Corporation�s limited experience with production and development stage mining operations, uninsured risks, regulatory changes, defects in title, availability of personnel, materials and equipment, timeliness of government approvals, actual performance of facilities, equipment and processes relative to specifications and expectations, unanticipated environmental impacts on operations market prices, continued availability of capital and financing and general economic, market or business conditions. These factors are discussed in greater detail i n the Corporation�s most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. The Corporation cautions that the foregoing list of important factors is not exhaustive.  Investors and others who base themselves on the Corporation�s forward-looking statements should carefully consider the above factors as well as the uncertainties they represent and the risk they entail.  The Corporation believes that the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this press release should not be unduly relied upon.  These statements speak only as of the date of this press release.

 

 

Contact

Osisko Mining Corporation
John Burzynski 
Vice-President Corporate Development 
Tel.: (514) 735-7131 
www.osisko.com 

Sylvie Prud�homme
Investor Relations
Tel.: (514) 735-7131
Toll Free: 1-888-674-7563

Renmark Financial Communications Inc.
John Boidman: jboidman@renmarkfinancial.com
Dan Symons: dsymons@renmarkfinancial.com
Tel.: (514) 939-3989 or (416) 644-2020 www.renmarkfinancial.com

 

Renmark Financial Communications Inc.

Montreal (Head Office): 2080 boul. Ren�-L�vesque Ouest, Montr�al, Qu�bec, H3H 1R6
Tel.: (514) 939-3989 Fax: (514) 939-3717
Toronto: 121 King Street West, Suite 1140, Toronto, Ontario, M5H 3T9
Tel.: (416) 644-2020 Fax: (416) 644-2021

Website: www.renmarkfinancial.com - Email: info@renmarkfinancial.com

 

Disclaimer: This correspondence is not to be construed as an offer to buy or sell securities or options. Renmark does not have any interest, directly or indirectly, in the Company or its securities, or any right or intent to acquire such an interest.

 

Osisko Mining Corp.

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CODE : OSK.TO
ISIN : CA6882781009
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Osisko Mining est une société de production minière d'or basée au Canada.

Osisko Mining détient divers projets d'exploration au Bresil, au Canada et en Argentine.

Son principal projet en production est MALARTIC au Canada et ses principaux projets en exploration sont GOLDBORO, SLEITAT, JC - SMART SKARNS, HAMMOND REEF, MALARTIC CHL GOLD PROPERTY, DUPARQUET et CLEMENT LAKE au Canada, EL POTOSI et SANTA CLARA / CERRO BONITO au Salvador, CERRO CONDORINI et COAL CREEK au Perou, CASTELO DOS SONHOS au Bresil et FAMATINA en Argentine.

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29/01/2014Commences Legal Proceeding to Restrain Misuse of Confidentia...
29/01/2014Announces Filing and Mailing of Directors' Circular and Reco...
20/01/2014Reports Preliminary Fourth Quarter 2013 Production
15/01/2014Responds to Unsolicited Proposal From Goldcorp Inc=2E
13/01/2014Responds to Announcement by Goldcorp
16/12/2013Completes Long-Term Debt Renegotiation
24/10/2013Provides Notice of Third Quarter 2013 Operating and Financia...
30/07/2013Enhances Financial Flexibility by Improving Long-Term Debt T...
05/07/2013Intercepts 68 Metres Averaging 1=2E26 =?ISO-8859-1?Q?=20g/t=...
02/07/2013Receives Final $30 Million Payment from Kirkland Lake Gold
29/04/2013Corporate Update
17/04/2013Comments on Trading Activities
09/04/2013(Malartic)Previews Q1 2013 Canadian Malartic Operating Results
21/03/2013Discovers Two New Gold-Copper Zones at Upper Beaver
19/02/2013(Malartic)Receives Modified Operating Parameters at Canadian Malartic
19/02/2013(Malartic)s Reserves at Canadian Malartic
11/02/2013Denis Cimon Receives the 2013 Mineral Processor of the Year
29/01/2013(Hammond Reef)Provides Resource Update for Hammond Reef Project
24/01/2013(Malartic)Previews Q4 2012 Canadian Malartic Operating Results and 201...
12/11/2012(Malartic)Reports Record Monthly Throughput at Canadian Malartic
15/10/2012Founder Retires
09/10/2012Acquires Ground in Emerging Gold Belt in Mexico and Identifi...
03/10/2012Deposits the Second Tranche of itsFinancial Guarantee Coveri...
03/08/2012Secondary Crusher Installation Completed
24/07/2012Acquisition of Subscription Receipts of Druk Capital Partner...
16/05/2012Enhances Credit Agreement With CPPIB
14/05/2012(Malartic)Provides Update on Canadian Malartic
10/05/2012(Malartic)Reports Fire at Canadian Malartic Milling Plant
03/04/2012and Metis Nation of Ontario Sign Memorandum of Understanding
12/03/2012Brings First Half of Secondary Crusher Online
01/03/2012Announces Record Date for Annual Meeting
16/02/2012Canadian gold producer Osisko Mining Corporation joins Globa...
12/01/2012(Malartic)Previews Q4 2011 Canadian Malartic Operating Results
03/01/2012Responds to Below Market Price Offer for 5 Million Shares On...
14/12/2011Osisko Comments on Trading of Common Shares
14/12/2011Comments on Trading of Common Shares
08/10/2011President Sean Roosen Named Ernst & Young 2011 Quebec Entrep...
17/06/2011(Duparquet)met fin =E0 sa participation au projet Duparquet
13/06/2011Osisko and Clifton Star Release Resource Estimate for the Be...
14/05/2011Osisko publie ses r=E9sultats du premier trismestre de 2011
12/05/2011Annual and Special Meeting of Shareholders of Osisko Mining ...
29/04/2011Osisko Announces Revised Mine Production Plan at Canadian Ma...
29/03/2011Osisko Exercises Buy Out Option in Canadian Malartic Net Sme...
09/02/2011Goldcorp Sells Osisko Investment
22/12/2009Donates Shares to McGill University
11/12/2009and Clifton Star Complete Joint Venture Agreement on Duparqu...
13/11/2009Options Goldboro Gold Property From Orex Exploration
28/09/2009 Signs Option Agreement With Claim Post Resources for the Mo...
24/09/2009 Enters Into Financing Agreement With CPPIB Credit Investmen...
11/08/2009Signs Option Agreement With Midland Exploration for the Dunn...
10/07/2009Report on Osisko's Canadian Malartic Bape Hearings is Made P...
03/07/2009Osisko Mining Corporation Completes Strategic Investment
18/06/2009Comments on Trading of Common Shares
21/05/2009Discovers New Mineralized Zone Adjacent to South Barnat
19/05/2009Makes Strategic Investment
13/01/2009 Extends South Barnat to 1200 Metres Length
04/12/2008 Recognized for Strong Sustainability Performance
07/04/2006(Castelo Dos Sonhos)Résultats positifs sur le projet diamantifère Pontax
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