Summary

Deposit type

• Vein / narrow vein
• Orogenic
• Mesothermal

Summary:

tyle gold mineralization and deposits, also referred to as mesothermal gold, or Greenstone-hosted quartz carbonate vein gold. The characteristics that the F2 Gold Deposit shares with that deposit type include a spatial association with a district- to regional-scale fault zone, mineralization associated with sometimes complex networks of quartz-carbonate veins that are hosted by steeply dipping brittle ductile shear zones and faults, greenschist to amphibolite-grade host rocks and extensive silica and carbonate alteration (DubÈ & Gosselin, 2007). Orogenic-style gold mineralization is typically related to the circulation of metamorphic fluids generated during tectonic accretionary processes. The deposits are characterized by strong lithological and structural controls and are hosted in deformed and metamorphosed volcanic, sedimentary, and granitoid rocks occurring across a range of crustal depths (Groves et al., 1998).

Orogenic gold deposits are widely distributed in the Neoarchean g

Mining

• Mechanized Cut & Fill
• Sub-level Retreat
• Uppers Retreat
• Alimak

Summary:

erground development including a commissioned shaft to approximately 730m below surface, a surface decline that connects to the underground workings, and surface infrastructure including a 650ktpa plant (permitted to 450ktpa), a tailings dam facility, electric power supply and substation, 200-person camp, earth-works and civil-works.

The Feasibility Study mine plan for the F2 Gold Deposit is based on a shaft and ramp-accessed underground mining operation producing an average of 1,250 t/d of ore from bulk and selective mining methods, including, uppers, mass blast raise mining (MBRM), longhole (LH) and cut-and-fill (C&F). Bulk methods average $98/t, and C&F - the only selective method - averages $163/t.

The Project development plans starts with six months (2,010 m) of lateral and vertical development prior to commencement of Pre-CP. During this period to the following is planned:
- Excavate decline connecting surface to the 122 m Level.
- Excavate two partially completed ramps between 305 m Level to 122 m Level to allow mine-wide equipment travel down to the 305 m Level.
- Develop a fresh air raise from the 610 m Level to the 305 m Level to allow lower mine development.

Following the 6-month development period, the 15-month Pre-CP starts to ramp-up production from 250 t/d to 900 t/d. In parallel, development crews will advance another 5,145 m laterally below the 305 m Level as well as perform vertical raise development (271 m) for return air raise from the 366 m Level to the 122 m Level.

By the end of LOM, the ramp will connect a total of 18 main levels, 61 m intervals, and 12 sub-levels of various interval spacing. Shaft access will be via 6 of the 18 main levels, specifically 122 m, 183 m, 244 m, 305 m, 610 m, and 685 m Levels.

Paste backfill, produced in a paste backfill plant in the Mill, will be made from a mixture of tailings and binder, 3 to 5%, and will be the primary backfill material.

Unconsolidated waste rock from development headings will be used to augment backfill where possible. Ore and waste will be direct loaded, on main levels, by load-haul-dump (LHD) into 50-t battery trucks. These 50-t battery trucks will either transport to surface via the main ramp or to the 610 m Level ore and waste rock-breaker/grizzly dumps. These dumps are equipped with remote operated rock-breakers will material passing through 300 mm grizzlies. The ore or waste material then is loaded onto a conveyor system on the 685 m Level, which transports the material out to the shaft loading pocket, where it is hoisted to surface. Whether hauled to surface by truck or hoisted in the shaft, ore will be crushed to <150 mm by a surface crusher prior to being conveyed to the processing facility.

Four mining methods were selected: longitudinal LH, uppers, C&F, and MBRM. These methods are industry-proven applications with favourable geometrical parameters for use on the Project resource.

Longhole Retreat
This bulk mining method is applied

Comminution

Crushers and Mills

Summary:

m Level with standard 23 cm openings (10" x 10") and a rock breaker to reduce the ore size prior to hoisting to the surface. Underground crushing was included in the initial design and a 48" jaw crusher, associated hoppers, structural steel, and electrical equipment were procured but never installed. Skipped ore was to be dumped into a 277-tonne capacity raw-ore bin adjacent to the headframe, while the waste was to be dumped into the waste bunker adjacent to the headframe. Ore was to be discharged from the raw-ore bin via a discharge chute onto a vibratory feeder, which would transfer ore in a controlled fashion onto the ore storage bin feed conveyor. A cross-belt magnet situated above, and running perpendicular to, the ore storage bin feed conveyor would be used to remove tramp metal from the ore as it was conveyed to the ore storage bin.

Initial 2015 operations used the mill reclaim system to feed ore into the Mill, then in September 2015 the full ore handling system was commissioned, less the underground crusher. The lack of crushing in 2015 presented some challenges for SAG mill operations, as out of specification (coarse) ore was fed into the circuit. For the 2018 operations, the ore handling system was not recommissioned since the bulk sampling process required that ore be stockpiled on surface separately by stope. Again, the reclaim system was used to feed the SAG mill and again some SAG mill control challenges were experienced. These historical operations have demonstrated that the SAG mill has capability to process -10" material, but that uncrushed ROM (typically sized at - 18") would not be possible.

The Feasibility Study mine production plan includes uncrushed ROM ore haulage to surface for 18 months while a new ROM sizing station is installed at the 610 m Level (rock breaker/grizzly). Thereafter, all mine production would be sized to -10" before being hoisted to surface. The Feasibility Study also includes the installation of a new SAG mill feed sampling system, which requires a 6 maximum topsize. A new surface crushing facility is therefore essential for smooth operation and good mine-mill metal reconciliation.

Surface Crushing Facility Project
A new surface crushing facility will be installed prior to mill start up.

Technical and commercial adjudications resulted in the selection of a loader-fed crushing option, located next to the existing raw-ore bin. The selected crusher is an MMD 625 double-tooth roll crusher, specified to t

Beneficiation

• Gravity separation
• Shaker table
• Calcining
• Smelting
• Carbon re-activation kiln
• Centrifugal concentrator
• Agitated tank (VAT) leaching
• Magnetic separation
• Carbon in leach (CIL)
• Elution
• Solvent Extraction & Electrowinning
• Cyanide (reagent)

Summary:

nditure. Evolution is working on expanding to 800ktpa but needs CAPEX and permitting.

The capacity of the Mill is 1,250 t/d. This section describes the Mill in its configuration, together with the capital projects identified in the Feasibility Study for reliable and efficient operation, and to allow the Mill to operate up to its design capacity of 1,800 t/d.

The existing process receives ore from the adjacent underground mine. Ore is either hauled by truck or hoisted to surface and following crushing, cleaned of metal scrap as it is conveyed to the ore storage bin. The ore is reclaimed from the ore storage bin and conveyed to the SAG mill. The discharge from the SAG mill is pumped to the ball mill which is configured in closed circuit via hydrocyclones. A gravity separation circuit is included within the circulating load to recover and concentrate gravity-recoverable gold present in the ore. The remaining gold is extracted in a conventional CIL circuit. Loaded carbon is removed from the CIL circuit using screens and is then washed with dilute hydrochloric acid solution to remove carbonate scale. Gold is then stripped from the loaded carbon in batches using a pressure Zadra elution process. Stripped carbon is forwarded to a reactivation kiln before being recycled into CIL, whilst the pregnant solution is pumped to a gold electrowinning circuit. The electrowinning and gravity circuits both produce high-grade gold concentrates that are smelted together in an electric induction furnace to produce dorÈ. Carbon fines are constantly recovered from the process to avoid gold loss, with fresh make-up carbon being continuously added to the process.

The cyanide contained in the CIL circuit tailing slurry is effectively eliminated in a cyanide destruction tank using the SO2/O2 cyanide destruction process. Either liquid SO2 or SMBS can be used as the source of SO2. Once the cyanide is destroyed, the tailing slurry is pumped to the TMF for storage. The Cyanide destruction process and mining both generate ammonia and cyanates as by-products so water must be treated to reduce these contaminants along with dissolved metals and fine suspended solids, to below regulated levels prior to discharge to the environment.

The Mill includes facilities designed to prepare paste backfill for the underground mining operation. When backfill is required by the mining operation, tailing slurry can be diverted to the paste plant where it is filtered to reduce the water content. Cake produced by the tailing filters is then mixed with fly ash and cement in a pre-determined ratio to produce a thick cement paste, which is pumped to the underground for backfilling.

The gold recovery plant, cyanide destruction process, and TMF were commissioned and operational in 2015. The backfill plant has not yet been commissioned, as the Project has not yet required backfill.

Water Supply

Summary:

er line for purposes such as drilling, muck pile watering, and other purposes. A potable water plant is fully commissioned and operating on site. A second potable water plant is located in the camp area, although this area is not currently operational. The Company holds all the surface rights required to conduct its potential operations at the Project and has access to local and fly-infly-out workers. Workers requiring accommodations in the area are currently housed off site.

The discharge pipe from the pump to the main header in the mill is a 250 mm (10) insulated heat traced sclair pipe.

The flow from the main header feed is distributed to 7 zones, six of which feed the mill sprinklers, fire hose cabinets, 3-exterior wall hydrants, and one connection point for pumper truck to feed system. The seventh zone is an 8 pipe that feeds a secondary fire suppression header in the Acti-flo/compressor building including sprinklers, fire hose cabinet, exterior wall hydrants and, a connection point for pumper truck to feed system.

All mine water collected will be transferred to the main mine sump on 610 m Level and pumped to surface.

Mine wastewater below the 610 m level will be collected in staging sumps in the main level accesses near the main ramp. These sumps will be equipped with 37 kW (50 hp) submersible pumps to stage dirty water up to the main sump on the 610 m Level through 150 mm (6") Schedule 40 pipe installed in the main haulage ramp.

All water between 610

Commodity Production

Operational metrics

Personnel

Job Title	Name	Phone	Profile	Ref. Date
Chief Operating Officer	Matt O'Neill			May 2, 2024
Consultant - Mining & Costs	Andrew MacKenzie			Sep 7, 2020
Consultant - Recovery Methods	Andy Holloway			Sep 7, 2020
Environmental Superintendent	Chris Gaspar			Dec 30, 2023
General Manager Operations	Thomas Lethbridge	+1-807-735-2077		Dec 30, 2023