The Mineral Resource estimate for the material on the heap leach pad that is directly amenable to processing is provided in Table 1. No cut-off criteria have been applied since there will be no selectivity of areas to be processed and the leach pad will be processed in its entirety. The Mineral Resources are reported inclusive of Mineral Reserves and have an effective date of 29 June 2017. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
The Mineral Resource estimate for the open-pit (other) areas is provided in Table 2 (Measured and Indicated) and Table 3 (Inferred). The Mineral Resources are reported inclusive of Mineral Reserves and have an effective date of 30 November 2017. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
Table 1: Mineral Resource Estimate for Mineralization Contained within the Heap Leach Pad
Mineral Resource Classification | Tons ('000) |
Gold (opt) |
Silver (opt) |
Contained Gold ('000 oz) |
Contained Silver ('000 oz) |
---|---|---|---|---|---|
Measured | 2,895 | 0.017 | 0.016 | 48.5 | 46.4 |
Indicated | 4,220 | 0.017 | 0.018 | 73.2 | 74.1 |
Measured & Indicated | 7,117 | 0.017 | 0.017 | 121.7 | 120.4 |
Inferred | 76 | 0.016 | 0.027 | 1.2 | 2.0 |
Notes:
- The effective date of the Mineral Resource estimate is June 29, 2017.
- The QP for the estimate is Mr. Ian Crundwell, P.Geo., of Mine Technical Services.
- Mineral Resources are quoted inclusive of Mineral Reserves. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
- Mineral Resources are contained within the Mineral Ridge leach pad facility with the following assumptions: a long-term gold price of $1,216/oz; assumed process costs of $11/t; and metallurgical recovery for gold of 91%. Silver was not used in the consideration of reasonable prospects for eventual economic extraction. Silver recoveries from heap leach pad material are projected to be 24%.
- Rounding may result in apparent differences when summing tons, grade and contained metal content.
- Tonnage and grade measurements are in Imperial units. Grades are reported in ounces per ton.
Table 2: Measured and Indicated Mineral Resource Tabulation for Other Areas
Area | Classification | Tons (kt) |
Gold Grade (opt) |
Contained Gold (koz) |
---|---|---|---|---|
Brodie | Measured | 455.7 | 0.063 | 28.6 |
Indicated | 237.9 | 0.056 | 13.4 | |
Subtotal Measured and Indicated | 693.6 | 0.060 | 41.9 | |
Custer | Measured | 147.8 | 0.083 | 12.3 |
Indicated | 75.4 | 0.088 | 6.6 | |
Subtotal Measured and Indicated | 223.2 | 0.085 | 18.9 | |
Drinkwater HW | Measured | 527.3 | 0.046 | 24.3 |
Indicated | 209.2 | 0.049 | 10.3 | |
Subtotal Measured and Indicated | 736.6 | 0.047 | 34.6 | |
Mary LC & Bunkhouse | Measured | 721.4 | 0.072 | 51.7 |
Indicated | 403.3 | 0.074 | 29.8 | |
Subtotal Measured and Indicated | 1,124.7 | 0.072 | 81.5 | |
Oromonte | Measured | 235.8 | 0.162 | 38.3 |
Indicated | 169.0 | 0.074 | 12.6 | |
Subtotal Measured and Indicated | 404.8 | 0.126 | 50.9 | |
Combined | Measured | 2,088.0 | 0.074 | 155.2 |
Indicated | 1,094.8 | 0.066 | 72.6 | |
Total Measured and Indicated | 3,182.8 | 0.072 | 227.8 |
Notes:
- The effective date of the Mineral Resource estimate is November 30, 2017.
- The QP for the estimate is Mr. Ian Crundwell, P.Geo., of Mine Technical Services.
- Mineral Resources are reported inclusive of Mineral Reserves at a gold cut-off grade of 0.01 opt Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
- Mineral Resources are constrained to the area within the grade-shell wireframes. The areas outside of these grade shells are assumed to be at zero grade.
- These Mineral Resource are considered to be amenable to open-pit mining. Conceptual Whittle pit shells used the following assumptions: a long-term gold price of $1,350/oz; assumed combined operating costs of $12.36/t (mining, process, general and administrative); metallurgical recovery for gold of 95%, and variable pit slope angles that ranged from 38--42º.
- Rounding may result in apparent differences between when summing tons, grade and contained metal content. Tonnage and grade measurements are in Imperial units. Grades are reported in ounces per ton.
Table 3: Inferred Mineral Resource Tabulation for Other Areas
Area | Classification | Tons (kt) |
Gold Grade (opt) |
Contained Gold (koz) |
---|---|---|---|---|
Brodie | Inferred | 2.4 | 0.034 | 0.08 |
Custer | Inferred | -- | -- | -- |
Drinkwater HW | Inferred | 180.1 | 0.059 | 10.61 |
Mary LC & Bunkhouse | Inferred | 0.1 | 0.061 | 0.01 |
Oromonte | Inferred | 0.4 | 0.092 | 0.03 |
Combined | Total Inferred | 182.9 | 0.059 | 10.73 |
Notes:
- The effective date of the Mineral Resource estimate is November 30, 2017.
- The QP for the estimate is Mr. Ian Crundwell, P.Geo., of Mine Technical Services.
- Mineral Resources are reported inclusive of Mineral Reserves at a gold cut-off grade of 0.01 opt. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability
- Mineral Resources are constrained to the area within the grade-shell wireframes. The areas outside of these grade shells are assumed to be at zero grade.
- These Mineral Resource are considered to be amenable to open-pit mining. Conceptual Whittle pit shells used the following assumptions: a long-term gold price of $1,350/oz; assumed combined operating costs of $12.36/t (mining, process, general and administrative); metallurgical recovery for gold of 95%, and variable pit slope angles that ranged from 38--42º.
- Rounding may result in apparent differences between when summing tons, grade and contained metal content. Tonnage and grade measurements are in Imperial units. Grades are reported in ounces per ton.
Mineral Reserve Statement
The Mineral Reserve estimates were prepared with reference to the 2014 Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Definition Standards and the 2003 CIM Best Practice Guidelines.
The Mineral Reserve estimate for the material on the heap leach pad is provided in Table 4. The estimate has an effective date of June 29, 2017.
Proven and Probable Mineral Reserves for the open-pit (other) area material are reported within the final pit design used for the mine production schedule and are shown in Table 5. The estimate has an effective date of November 30, 2017.
Table 4: Mineral Reserve Estimate for the Heap Leach Pad
Mineral Reserve Classification | Tons ('000) |
Gold (opt) |
Silver (opt) |
Contained Gold ('000 oz) |
Contained Silver ('000 oz) |
---|---|---|---|---|---|
Proven | 2,895 | 0.017 | 0.016 | 48.5 | 46.4 |
Probable | 4,220 | 0.017 | 0.018 | 73.2 | 74.1 |
Less Material Remaining in Place due to facility designs | (260) | 0.017 | 0.017 | (4.5) | (4.6) |
Total Proven & Probable | 6,855 | 0.017 | 0.017 | 117.2 | 115.9 |
Notes:
- The Mineral Reserves have an effective date of June 29, 2017.
- The QP for the estimate is Mr. Jeffery Choquette P.E., an employee of Hard Rock Consulting.
- Mineral Reserves are contained within the Project leach pad facility with the following assumptions: long-term gold price of $1,216/oz; assumed total ore process costs of $10.59/t; metallurgical recovery for gold of 91%, and 24% for silver, refining and smelting cost of $28.39/oz of gold. Allowance has been made for the facility location which excludes 260,000 t; this material must remain in-place, based on the to the heap material mining and tailings placement design.
- Rounding as required by reporting guidelines may result in summation differences.
Table 5: Mineral Reserve Estimate for the Other Areas
Pit Area | Mineral Reserve Classification | Tons ('000) |
Gold (opt) |
Contained Gold ('000 oz) |
---|---|---|---|---|
Brodie | Proven | 51 | 0.042 | 2.1 |
Probable | 12 | 0.027 | 0.3 | |
Subtotal Proven and Probable | 63 | 0.039 | 2.5 | |
Custer | Proven | 314 | 0.047 | 14.8 |
Probable | 144 | 0.032 | 4.6 | |
Subtotal Proven and Probable | 459 | 0.042 | 19.4 | |
Drinkwater | Proven | 836 | 0.038 | 32.1 |
Probable | 352 | 0.033 | 11.7 | |
Subtotal Proven and Probable | 1,189 | 0.037 | 43.7 | |
Mary LC | Proven | 470 | 0.035 | 16.3 |
Probable | 276 | 0.035 | 9.7 | |
Subtotal Proven and Probable | 746 | 0.035 | 26.0 | |
Bunkhouse | Proven | 239 | 0.047 | 11.1 |
Probable | 4 | 0.021 | 0.1 | |
Subtotal Proven and Probable | 243 | 0.046 | 11.2 | |
Oromonte | Proven | 563 | 0.071 | 39.8 |
Probable | 449 | 0.030 | 13.7 | |
Subtotal Proven and Probable | 1,012 | 0.053 | 53.5 | |
Total Combined | Proven | 2,474 | 0.047 | 116.2 |
Probable | 1,239 | 0.032 | 40.1 | |
Total Proven and Probable | 3,713 | 0.042 | 156.3 |
Notes:
- The Mineral Reserves have an effective date of November 30, 2017.
- The Qualified Person for the estimate is Mr. Jeffery Choquette P.E., an employee of Hard Rock Consulting LLC.
- Mineral Reserves are reported within the pit designs at a 0.01 opt gold cut-off grade. Pit designs incorporate the following considerations: base case gold price of $1,300/oz; pit slope angles that range from 38--47º; average life-of-mine metallurgical recovery assumption of 93%; crushing costs of $1.81/t, process cost of $5.79/t, general and administrative and tax costs of $2.90/t; and average mining costs of $1.42/t mined
- Rounding as required by reporting guidelines may result in summation differences.
An NI 43-101 compliant technical report in support of the resource and reserve estimates and associated updated feasibility study was filed on SEDAR on January 9, 2018.