The Tamarack North Project hosts magmatic Ni-Cu-Co-PGE sulphide mineralization. These deposits form as the result of segregation and concentration of liquid sulphide from mafic or ultramafic magma and the partitioning of chalcophile elements into the sulphide from the silica melt (Naldrett, 1999).

Ni-Cu-Co sulphide deposits are economically important because they present favourable economics compared to the mining and processing of Ni laterite deposits. This is due to their relatively high-grade and comparatively low capital cost requirements. The various mineralized zones at the
Tamarack North Project occur within different host lithologies, exhibit different types of mineralization styles, and display varying sulphide concentrations and tenors. These mineralized zones range from massive sulphides hosted by altered sediments in the MSU, to net textured and disseminated sulphide mineralization hosted by the CGO in the SMSU; to a more predominantly disseminated sulphide mineralization as well as layers of net textured sulphide mineralization, in the 138 Zone. Mineralization in the 138 Zone, where interlayered disseminated and net textured mineralization occurs is referred to as MZ mineralization. All these mineralization types are typical of many magmatic sulphide ore bodies around the world. The current known mineral zones of the Tamarack North Project (SMSU, MSU and 138 Zone) that are the basis of this resource statement are referred to as the Tamarack Zon ........

The Tamarack deposit will be mined using underground mining methods.

Different underground mining methods will be utilized for the deposits: bulk long hole mining
method for SMSU (consisting of an Upper and Lower SMSU) and selective drift-and-fill
method for the narrower MSU. The selected mining methods will provide flexibility and selectivity to ensure consistent feed blend to the process plant at a rate of 2,000 tpd.

Mining Method for the Upper and Lower SMSU
The mining method proposed for the Upper and Lower SMSU is transverse long hole open stoping with cemented paste backfill.

For the Upper and Lower SMSU ore bodies, mining will be progressed by means of the following steps:

- Mine levels [ [mL50] and [mL0] will be developed away from the shaft to reach the Upper SMSU. Levels [mL-115] and [mL-130] will be developed to reach the Lower SMSU;
- Declines (ramps) will be developed from each level, parallel to each of the Upper and Lower SMSU ore bodies. Following this, crosscuts will be developed into the orebodies, an overcut (for drilling and blasting) and an undercut (for loading and mucking) for each stope;
- Stopes will be mined in a “primary-secondary” sequence from the bottom levels and advancing upwards;
- A vertical slot parallel with the SMSU is developed from where fan drilling will be used to blast the trough. Blast holes are then drilled from an overcut therefore the overcut will be sil ........

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