Resources and reserves
Proven and Probable Mineral Reserves
| Property | Location | Cut-off | Proven | Probable | Proven and Probable | ||||||
| Tonnes | Grade | Au oz | Tonnes | Grade | Au oz | Tonnes | Grade | Au oz | |||
| g/t | (M) | g/t | (M) | (M) | g/t | (M) | (M) | g/t | (M) | ||
| Canadian Malartic | Quebec | 0.30-0.32* | 48.7 | 0.8 | 1.26 | 295.0 | 1.00 | 9.45 | 343.7 | 0.97 | 10.71 |
Mineral Resources (Indicated and Inferred)
(excludes Proven and Probable reserves)
| Property | Location | Cut-off | Indicated | Inferred | ||||
| Tonnes | Grade | Au oz | Tonnes | Grade | Au oz | |||
| g/t | (M) | g/t | (M) | (M) | g/t | (M) | ||
| Canadian Malartic | Quebec | 0.30-0.32* | 47.6 | 0.77 | 1.18 | 33.9 | 0.78 | 0.85 |
| Hammond Reef | Ontario | 0.3 | 259.4 | 0.80 | 6.70 | |||
| Total | 1.18 | 7.55 | ||||||
Canadian Malartic Undiluted Resource Estimates within US$1000 Whittle Pit Shell
| Measured | Indicated | Total M&I | |||||||
| Grade (g/t) | Tonnes (M) | Au (M oz) | Grade (g/t) | Tonnes (M) | Au (M oz) | Cut-off (g/t) | Grade (g/t) | Tonnes (M) | Au (M oz) |
| 1.00 | 37.4 | 1.20 | 1.10 | 267.7 | 9.43 | 0.30-0.32* | 1.08 | 305.1 | 10.63 |
| 1.07 | 33.8 | 1.16 | 1.19 | 237.2 | 9.08 | 0.40 | 1.17 | 271.0 | 10.24 |
| 1.17 | 28.7 | 1.09 | 1.30 | 205.9 | 8.63 | 0.50 | 1.29 | 234.6 | 9.71 |
| 1.30 | 24.0 | 1.00 | 1.42 | 178.8 | 8.15 | 0.60 | 1.40 | 202.8 | 9.15 |
| 1.43 | 20.0 | 0.92 | 1.52 | 156.9 | 7.69 | 0.70 | 1.51 | 176.9 | 8.61 |
| 1.56 | 16.8 | 0.84 | 1.62 | 139.7 | 7.28 | 0.80 | 1.61 | 156.5 | 8.12 |
| 1.68 | 14.4 | 0.78 | 1.71 | 125.2 | 6.88 | 0.90 | 1.71 | 139.5 | 7.66 |
| 1.81 | 12.2 | 0.71 | 1.80 | 112.6 | 6.50 | 1.00 | 1.80 | 124.8 | 7.21 |
| Inferred | |||
| Grade (g/t) | Tonnes (M) | Au (M oz) | Cut-off (g/t) |
| 0.68 | 9.0 | 0.20 | 0.30-0.32* |
| 0.79 | 6.8 | 0.17 | 0.40 |
| 0.89 | 5.2 | 0.15 | 0.50 |
| 1.00 | 4.0 | 0.13 | 0.60 |
| 1.13 | 2.9 | 0.11 | 0.70 |
| 1.25 | 2.2 | 0.09 | 0.80 |
| 1.35 | 1.8 | 0.08 | 0.90 |
| 1.47 | 1.4 | 0.06 | 1.00 |
Sensitivity of the in-pit diluted M&I resource to gold price is as follows (inferred resources excluded):
| Gold Price (US$) | Grade (g/t) | Tonnes (M) | Oz (M) | Strip Ratio (Waste/Ore) |
| $800 | 1.05 | 300.1 | 10.15 | 2.01 |
| $900 | 1.01 | 328.0 | 10.60 | 2.00 |
| $1000 | 0.96 | 353.7 | 10.95 | 1.96 |
| $1100 | 0.93 | 376.1 | 11.20 | 1.89 |
| $1200 | 0.90 | 395.9 | 11.41 | 1.84 |
| $1300 | 0.86 | 419.6 | 11.65 | 1.80 |
| $1400 | 0.84 | 437.0 | 11.80 | 1.76 |
| $1500 | 0.82 | 452.0 | 11.91 | 1.71 |
| $1600 | 0.80 | 466.0 | 12.01 | 1.66 |
Canadian Malartic
Updated Global Resource Estimates
| Measured | Indicated | Total M&I | |||||||
| Grade (g/t) | Tonnes (M) | Au (M oz) | Grade (g/t) | Tonnes (M) | Au (M oz) | Cut-off (g/t) | Grade (g/t) | Tonnes (M) | Au (M oz) |
| 0.98 | 40.7 | 1.28 | 1.05 | 312.0 | 10.52 | 0.30-0.32* | 1.04 | 352.7 | 11.80 |
| 1.05 | 36.5 | 1.23 | 1.15 | 271.5 | 10.06 | 0.40 | 1.14 | 308.0 | 11.29 |
| 1.16 | 30.8 | 1.15 | 1.27 | 231.5 | 9.49 | 0.50 | 1.26 | 262.3 | 10.63 |
| 1.28 | 25.6 | 1.06 | 1.40 | 198.3 | 8.90 | 0.60 | 1.38 | 224.0 | 9.96 |
| 1.41 | 21.3 | 0.97 | 1.51 | 172.3 | 8.36 | 0.70 | 1.50 | 193.6 | 9.32 |
| 1.55 | 17.8 | 0.88 | 1.61 | 152.3 | 7.88 | 0.80 | 1.60 | 170.0 | 8.76 |
| 1.67 | 15.1 | 0.81 | 1.70 | 135.5 | 7.42 | 0.90 | 1.70 | 150.6 | 8.23 |
| 1.80 | 12.9 | 0.74 | 1.79 | 121.4 | 6.99 | 1.00 | 1.79 | 134.2 | 7.73 |
| Inferred | |||
| Grade (g/t) | Tonnes (M) | Au (M oz) | Cut-off (g/t) |
| 0.78 | 33.9 | 0.85 | 0.30-0.32* |
| 0.91 | 25.9 | 0.75 | 0.40 |
| 1.06 | 19.3 | 0.66 | 0.50 |
| 1.20 | 15.1 | 0.59 | 0.60 |
| 1.37 | 11.7 | 0.51 | 0.70 |
| 1.52 | 9.4 | 0.46 | 0.80 |
| 1.64 | 8.0 | 0.42 | 0.90 |
| 1.74 | 7.0 | 0.39 | 1.00 |
MINERAL RESOURCES
Brett Resources Inc. – Hammond Reef Project, Ontario
| Inferred | |||
| Grade (g/t) | Tonnes (M) | Oz (M) | Cut-off (g/t) |
| 1.46 | 60.2 | 2.83 | 1.00 |
| 1.35 | 77.1 | 3.34 | 0.90 |
| 1.24 | 98.4 | 3.93 | 0.80 |
| 1.14 | 124.6 | 4.56 | 0.70 |
| 1.04 | 155.0 | 5.19 | 0.60 |
| 0.95 | 188.5 | 5.78 | 0.50 |
| 0.87 | 227.0 | 6.34 | 0.40 |
| 0.80 | 259.4 | 6.70 | 0.30 |
| 0.76 | 281.9 | 6.89 | 0.20 |
Technical Information
All Mineral Reserves and Mineral Resources have been calculated in compliance with the standards of the National Instrument 43-101.
For further details on the Mineral Reserves and Resources please refer to: Osisko’s press releases dated November 25, 2008 (http://www.osisko.com/en/press/2008/11/25/297/positive-feasibility-study-converts-6-2-million-ounces-to-mineral-reserves-at-canadian-malartic-project.html ) , February 10, 2010 (http://www.osisko.com/en/press/2010/02/10/474/osisko-announces-9-million-ounce-gold-reserve-at-canadian-malartic.html ) and March 31, 2011 (http://www.osisko.com/en/press/2011/03/31/593/osisko-increases-gold-reserve-at-canadian-malartic-to-10-7-million-ounces-total-reserves-up-19-percent.html); Brett’s press release of November 12, 2009 (http://www.brettresources.com/s/NewsReleases.asp?ReportID=371714&_Type=News-Releases&_Title=Bretts-Hammond-Reef-Delivers-Robust-Economic-Results); Technical Reports “Updated resource and reserve estimates for the Canadian Malartic Project, March 22, 2010” (http://www.osisko.com/pdfs/2010-03-22_Updated_reserve_and_resource_estimates.pdf) and Preliminary Assessment of the Hammond Reef Gold Project Atikokan, Ontario,Canada, November 27, 2009. (http://www.brettresources.com/i/pdf/2009-11-27_HR_NI43-101.pdf)
The technical information has been prepared under the supervision of, and reviewed by, the following Qualified Persons as defined by the National Instrument 43-101:
- Mr. Terry Hennessey , P. Geo. of Micon International Limited, Mr. Elzéar 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 for the Canadian Malartic Deposit.
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Mr. Joseph P. Ringwald, P. Eng., Vice-President Operations for Brett, Mr. John Zbeetnoff, P. Geo, Hammond Reef Project Manager for Brett, and Mr. Richard J. Lambert, P.E., Scott Wilson Roscoe Postle Associates, Inc. for the Hammond Reef Deposit.