The South West, Windjammer South, Windjammer Central, Discovery, Windjammer North, and 55 deposits of the Golden Highway Project can be classified as structurally-controlled orogenic gold deposits in an Archean greenstone belt setting. The Abitibi greenstone belt of Ontario and Quebec is located in the southeastern portion of the Superior Province (Nassif et. al 2018) of the Canadian Shield. This deposit type is a significant source of gold mined in the Superior and Slave provinces. Dubè and Gosselin (2007) published an overview of greenstone hosted gold deposits in Canada. These deposits are typically quartz-carbonate vein hosted and are distributed along crustal-scale fault zones that mark convergent margins between major lithological boundaries such as those between volcano-plutonic and sedimentary domains. The Golden Highway Project is located on the DPFZ (Destor Porcupine Fault Zone), a major regional structure.

The DPFZ in northeastern Ontario, hosts the largest Archean orogenic gold camp in the world and has produced over 75 Moz of gold from the Timmins Camp alone. When combined with the adjacent Larder Lake-Cadillac Fault Zone and associated splays, this region has hosted over 200 Moz of gold (Dubé, B et al. 2017).

The greenstone-hosted quartz-carbonate vein deposits are structurally controlled, epigenetic deposits characterized by simple to complex networks of gold-bearing, laminated quartzcarbonate structure-fill veins. These veins are hosted b ........

The complexity of the multiple, parallel, narrow to medium thickness mineralized structures, spatially located at depth presents challenges to underground mine design, however the mineral resource to be considered in the mine production rate, design and production schedule for the SW zone is considered suitable for the proposed mining and extraction method.

The proposed mining method for the SW zone is Longitudinal Longhole Stoping with conventional drilling and blasting. The optimal nominal mine production rate for the SW zone project is estimated to be 1,750 tonnes per day (t/d), taking into consideration the geometry of the deposits. Waste rock generated from the mine will be the main source of unconsolidated backfill.

The main decline provides access into the mine with a series of internal ramps linking one mining area to another,while crosscuts provide access into the deposits. Sills are developed in each deposit where production drilling and blasting will be carried out.

Excavated mineralized material from the mine will be transported to the processing facilities on surface with trucks, while waste material will be transported and deposited into excavated stopes to provide a working platform for the subsequent mining lift.

The cut-off grade (CoG) of 2.6 g/t was established based upon input parameters including a mining cost of C$75/t mill feed and milling cost of C$40/t mill feed, and was subsequently used in the Datamine ........

- subscription is required.

The selected process plant flowsheet for the on-site processing scenario will include the following unit operations:
- Single stage crushing.
- Two stages of grinding with closed circuit pebble crushing and hydrocyclone classification.
- Gravity separation and intensive leaching of the final gravity concentrate.
- Cyanide leaching and carbon adsorption using carbon-in-pulp (CIP) technology.
- Cyanide destruction of plant tailings and storage of slurry tailings.
- Loaded carbon acid wash, elution and regeneration.
- Electrowinning, refining and production of gold doré bars.

Gravity Gold Recovery
A fraction of the cyclone underflow (approximately 30%) will report to two centrifugal gravity concentrators. On average, approximately 50% of the gold in the plant feed is estimated to be recovered by the gravity circuit. An intensive leach unit will be used to solubilize the gold from the gravity concentrate, and gold in the pregnant solution ........