Table 1: Roby Zone Underground Reserves – Lac des Iles Mine
| Location |
Tonnes
(000s) |
Pd
(g/t) |
Pt
(g/t) |
Au
(g/t) |
Cu
(%) |
Ni
(%) |
| Reserve |
 |
 |
 |
 |
 |
 |
| Proven |
480 |
5.80 |
0.33 |
0.20 |
0.041 |
0.052 |
| Probable |
1,209 |
6.43 |
0.38 |
0.30 |
0.065 |
0.074 |
| Proven & Probable |
1,689 |
6.25 |
0.37 |
0.27 |
0.058 |
0.068 |
|
Notes:
- Prepared by Richard Routledge, M.Sc., P.Geo., Principal Geologist for URS/Scott Wilson, an independent Qualified Person within the meaning of NI 43-101.
- CIM definitions were followed for the estimation of Mineral Reserves.
- Mineral Reserves for the underground Roby Zone were estimated at a cut-off grade of 4.5 g/t Pd.
- Metal price assumptions of US$375/oz palladium, US$1,500/oz platinum, US$900/oz gold,US$7.00/lb nickel, and US$2.50/lb copper were used in the estimation of cut-off grade. A US$/C$ exchange rate of 1.11 was used.
- Variable dilution has been applied according to anticipated over-break on footwall or hanging wall, and to the location of stopes with respect to hanging wall structures that affect over-break.
- Mining extraction for the crown pillar is 100%. For Roby Zone stopes, extraction is 95%.
The resources of the Offset Zone were estimated by URS/Scott Wilson, published on May 27, 2010, and remain unchanged until the 2010 drilling can be incorporated. Other resources have been reviewed and updated by URS/Scott Wilson. The next resource update for the Offset Zone, which will incorporate all of the 2010 drill results, is expected in the second quarter of 2011.
Table 2: Mineral Resource Summary – Lac des Iles Mine
| Location |
Tonnes
(000s) |
Pd
(g/t) |
Pt
(g/t) |
Au
(g/t) |
Cu
(%) |
Ni
(%) |
| Measured Resources |
 |
 |
 |
 |
 |
 |
| Open Pit |
3,722 |
1.99 |
0.23 |
0.17 |
0.08 |
0.07 |
| Stockpiles |
747 |
1.89 |
0.19 |
0.16 |
0.06 |
0.08 |
| Total Measured |
4,469 |
1.97 |
0.22 |
0.17 |
0.07 |
0.07 |
| Indicated Resources |
 |
 |
 |
 |
 |
 |
| Open Pit |
2,565 |
2.20 |
0.24 |
0.18 |
0.08 |
0.07 |
| RGO Stockpiles |
13,365 |
0.97 |
0.12 |
0.08 |
0.03 |
0.06 |
| Roby Zone Underground |
3,144 |
7.62 |
0.44 |
0.33 |
0.06 |
0.08 |
| Offset Zone Underground |
8,628 |
6.29 |
0.42 |
0.40 |
0.11 |
0.14 |
| Total Indicated |
27,702 |
3.50 |
0.26 |
0.22 |
0.06 |
0.09 |
| Total M&I Resources |
32,171 |
3.28 |
0.26 |
0.21 |
0.06 |
0.08 |
| Inferred Resources |
 |
 |
 |
 |
 |
 |
| Offset Zone Underground |
3,322 |
5.70 |
0.35 |
0.23 |
0.07 |
0.10 |
|
Notes:
- Prepared by Jason Cox, P.Eng., Supervisor of Mine Engineering for URS/Scot Wilson, an independent Qualified Person within the meaning of NI 43-101.
- CIM definitions were followed for the estimation of Mineral Resources.
- Mineral Resources are inclusive of Mineral Reserves, which are contained in the Roby Zone underground mine.
- Mineral Resource cut-off grades were estimated for a 14,000 tpd production scenario. Open pit and RGO stockpile resources are not economic at the current production rate.
- Open Pit Mineral Resources were estimated at a pit discard cut-off grade of 1.8 g/t palladium equivalent (PdEq), within an optimized pit shell. Additional mineralization is present outside of the pit shell.
- Mineral Resources in stockpiles were estimated at a cut-off grade of 1.9 g/t PdEq.
- Mineral Resources for the Roby Zone underground mine were estimated at a cut-off grade of 5.8 g/t PdEq. Resources include sill, rib, and crown pillars.
- Mineral Resources for the underground Offset Zone were estimated at a cut-off grade of 4.0 g/t Pd (6.0 g/t PdEq).
- PdEq factors were calculated separately for each area, based on operating cost and metallurgical performance estimates appropriate for those areas.
- Metal price assumptions of US$350/oz palladium, US$1,400/oz platinum, US$850/oz gold, US$6.50/lb nickel, and US$2.00/lb copper were used in the estimation of PdEq and cut-off grade. A US$/C$ exchange rate of 1.11 was used. For the Offset Zone, metal price basis is: US$400/oz Pd; US$1,400/oz Pt;US$1,000/oz Au; US$3.00/lb Cu; US$8.50/lb Ni; US$20/lb Co. Exchange rate is 1.11 US$/C$.
- Effective dates are variable for the various areas of Mineral Resources.
|