The Dublin Gulch property (Eagle Gold Mine) is underlain by upper Proterozoic to lower Paleozoic clastic sedimentary rocks that have undergone regional deformation including Cretaceous age thrust faulting and subsequent granitoid intrusions. Mineralization is associated with granitic intrusive bodies, here described as the Eagle Zone and Olive Zone gold deposits, which are hosted primarily in granodioritic rocks. The gold deposits occur within the Tombstone Gold Belt, located in the eastern portion of the Tintina Gold Province, which also hosts the Brewery Creek deposit and other gold occurrences in the Yukon.

The property is located on the northern limb of the McQuesten Antiform and is underlain by Proterozoic to Lower Cambrian-age Hyland Group metasediments and the Dublin Gulch intrusion, a granodioritic stock. The Dublin Gulch Stock is comprised of four intrusive rock phases, the most significant of which is Granodiorite. The stock has been dated at approximately 93 Mega annum (Ma).

The metasediments are the product of greenschist-grade regional metamorphism. Proximal to the Dublin Gulch Stock, these metasediments have undergone metasomatism and contact metamorphism. A hornfelsic thermal halo surrounds the stock and within the halo, the metasediments have been altered to schist, marble and skarn.

The Eagle and Olive zones belong to the RIRGS class (Reduced Intrusion-Related Gold Systems) of mineral deposits.

The Eagle Zone gold o ........

The Eagle Gold Mine comprises the Eagle and Olive deposits which are mined using open pit methods.

Open pit mining will focus on the various Eagle pit phases with the smaller Olive pit coming into production in 2028.

- Year 2019: Completed pre-stripping the Eagle pit and transitioned into production phase.
- Year 2020: First year of full production with heap leach stacking and processing after preproduction and ramp up period have completed.
- Year 2021: Mining in Eagle Phase 1 and 2 will continue with waste stripping of Phase 3 commencing.
- Years 2022-2024: Mining at the Eagle Phase 1 be completed in late 2022, with Phase 2 ending in 2024, while Phase 3 continues over the entire period. ROM material is expected to start hauling to the secondary HLP at the start of 2024.
- Years 2025 to 2027: The primary HLP is expected to reach the crush ore capacity in 2027 and remainder of crush ore is conveyed to the secondary HLP near the Olive deposit.
- Years 2028 to 2031: Mining at Eagle Phase 3 is completed in 2030. The Olive open pit commences in 2028 and is completed at the middle of 2031.

The open pits are designed with 10 m benches in both waste and ore headings with adequate phase geometry to achieve a maximum production rate of 31M t/year. Mining is scheduled to advance sequentially through the pits and various internal phases with several phases active at any one time. Given the required production rate and pit g ........

- subscription is required.

The gold recovery process was designed on the basis of leaching approximately 13M t of ore per year with an average gold head grade of 0.64 g/t (ROM and crushed ore combined) at an overall gold recovery of 77%.

The three-stage crushing plant operates at a nominal primary crushing rate of 29,500 t/d, 365 days per year and a secondary and tertiary crushing rate of 39,200 t/d, 275 days per year. During the coldest part of the year (January through March), fine crushing and HLP loading activities are suspended. Barren solution, made up of a cyanide-caustic mixture, is pumped at a nominal rate of 2,070 m3 /h to a network of supply piping and drip emitters on the HLPs. Pregnant solution is collected in a sump near the bottom of the HLPs and pumped to the 8 t/d carbon ADR plant for gold extraction and the production of gold doré.

The gold ore processing facilities include the following unit operations:

Heap Leach Pad
• Crushed ore stacking and spreadin ........