The Sugar Zone Property is located in northern Ontario, approximately 68 km east of the Hemlo area gold mines, 30 km north of White River which is on the Trans-Canada Highway 17.
Sugar Zone Mine
The Sugar Zone Mine entered commercial production in 2019 and has an anticipated mine life of approximately 13 years at current production levels. The mine is currently producing from the Sugar Zone North and South areas. Development is underway to the Middle Zone, which will open up a whole new mining area, expected by mid-2021.
60,000 to 65,000 ounces per year* at 800 tpd throughput rate
Mine Expansion Study to support 1,200 tpd throughput underway
Stabilized Cash Costs at 800 tpd
About Sugar Zone Mine
The Sugar Zone Mine is a high-grade underground gold mine that entered commercial production in 2019. Based on current mineral reserves, the Sugar Zone Mine has a mine life of approximately 13 years based on rated rated processing of 800 tpd.
The Company is exploring an expansion scenario to increase mine and mill throughput by 50%, from 800 tpd to 1,200 tpd. Previous studies determined that the Sugar Zone Mine could support 1,200 tpd based on the current Mineral Resource Estimate. The Company expects to deliver a Feasibility Study in the fourth quarter of 2020.
The Sugar Zone Property is comprised of 309 patented and leased claims covering 79,355 hectares.
The Mineral Resource Estimate was derived from applying Au grade cut-off values to the block model and reporting the resulting tonnes and grade for potentially underground mineable areas. Based on a gold price of US$1,250/oz, process recovery of 96%, an exchange rate of US$0.80=CAD$1.00, a 3.0 g/t Au cut-off grade was utilized.
The Sugar Zone Property is located in the Dayohessarah Greenstone Belt of late Archean (ca. 2.7 Ga) age that is part of the Abitibi-Wawa Subprovince of the Superior Province. The belt is approximately 36 km in length and varies in width from 1.5 to 5.5 km. Principal lithologies in the belt are moderately to highly deformed metamorphosed volcanics, volcanoclastics and sediments that have been enclosed and intruded by tonalitic to granodioritic quartz-porphyry plutons.
In the Sugar Zone Gold Deposit (“Sugar Zone” or “Deposit”), gold mineralization occurs in quartz veins, quartz stringers and quartz flooded zones predominantly associated with narrow porphyry sills, porphyry contact zones, hydrothermally altered mafic metavolcanics and, rarely in weakly altered mafic metavolcanics. The mineralization occurs in three parallel zones, the Upper, Lower and Footwall Subzones, that range in thickness from 1.5 to 10 m, strike at 140° and dip between -65° and -75° to the west. The three subzones are separated by 20 to 30 m of non-mineralized metavolcanics. The Sugar Deformation Zone is a high strain deformation zone associated with the mineralization with a northwest trend and dips west at 65° to 75°. The mineralization has been defined for over 1.5 km strike length and to a vertical depth of over 1,200 m and remains open along strike and at depth. Fine to coarse-grained specks and blebs of visible gold are common in the Sugar Zone quartz veins, usually occurring within marginal, laminated or refractured portions of the veins. Quartz veins and silicified rocks also contain varying amounts of pyrrhotite, pyrite, chalcopyrite, galena, sphalerite, molybdenite and arsenopyrite.
The Sugar Zone Mine is accessible via a ramp system. The primary mining method is longitudinal retreat stoping. Typically, four sublevels are combined to form a mining block and within each mining block a bottom-up stoping sequence will be used.
The process plant produces a gold dore bar and bagged gold concentrate thgrough gravity concentration and flotation circuits, respectively. The process plant has a rated throughput capacity of 800 tonnes per day.
Reserves and Resources
The Mineral Resource Estimate was derived from applying Au grade cut-off values to the block model and reporting the resulting tonnes and grade for potentially underground mineable areas. Based on a gold price of US$1,250/oz, process recovery of 96%, an exchange rate of US$0.80=CAD$1.00, a 3.0 g/t Au cut-off grade(1-5) was utilized.
Mineral Resource Estimate
Tonnes g/t Au oz Au Indicated 4,243,000 8.1 1,108,000 Inferred 2,954,000 5.9 558,000
- Mineral Resources, which are not Mineral Reserves, do not have demonstrated economic viability.
- The estimate of Mineral Resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues.
- The Inferred Mineral Resource in this estimate has a lower level of confidence than that applied to an Indicated Mineral Resource and must not be converted to a Mineral Reserve. It is reasonably expected that the majority of the Inferred Mineral Resource could be upgraded to an Indicated Mineral Resource with continued exploration.
- The Mineral Resources in this report were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by the CIM Council.
- Advanced exploration bulk sample and commercial production mined-out areas were depleted from the Mineral Resource model.
Probable Mineral Reserve Classification
Tonnes g/t Au oz Au Sugar Zone 2,437,000 7.4 583,000 Middle and Wolf Zones 1,442,000 6.6 307,000 Total 3,879,000 7.1 890,000
- The Mineral Reserve Estimate is based on a gold price of US$1,300/oz, with 94.4% process recovery, an initial cut-off grade of 3.5 g/t Au to define stopes, then a cut-off grade of approximately 4.4 g/t Au that includes capital development costs.
- The Mineral Reserves in this Technical Report were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by the CIM Council.
- Bulk sample and commercial production mined-out areas were depleted from the Mineral Reserve.
Technical ReportTechnical Report and Feasibility Study on the Sugar Zone Gold Operation - May 2019