The Hope Bay Property is located within the Hope Bay volcanic belt which is part of a massive structural-geological complex called the Slave Structural Province.

The Hope Bay deposits (Doris, Madrid, and Boston), as well as a large number of other prospects, are considered to be typical of orogenic-type mesothermal lode gold deposits, greenstone-hosted quartz carbonate vein deposits.

• The Doris gold deposit is a typical Archean lode deposit which occurs within an over 3 km long, steeply dipping quartz vein system, in folded and metamorphosed pillow basaltic rocks.
• The Madrid deposit area lies within a north-south striking package of mafic volcanic rocks, comprising a sequence of Fe-Ti tholeiitics, Mg tholeiitics, komatiitic basaltic, synvolcanic to late gabbroic, and ultramafic rocks.
• The geology in the area of the Boston deposit is a bimodal assemblage of mafic and felsic volcanic rocks in contact with sedimentary rocks, all of which are complexly folded about a large-scale synformal-anticline. The core of the anticline is occupied by mafic volcanic rocks that host the Boston deposit and these are in turn overlain by sedimentary rocks.

THE DORIS AREA
The Doris Deposit is located at the north end of the north-south trending Hope Bay greenstone belt of Archean age near Cambridge Bay in Nunavut. Gold mineralization is contained within predominantly sub vertical quartz veins hosted within mafic volcanic rocks.

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During 2018 and 2019 a small open pit was mined near Doris Lake where the hinge outcropped at surface.

A small open pit is currently being mined on the Naartok East Limb.

Mining at the Hope Bay Project incorporates longhole mining methods in order to address the deposit geometry and anticipated ground conditions. Mining will take place under permafrost conditions where the mineralization is located away from any water bodies and under nonpermafrost conditions in what is known as the talik in the vicinity and under the lakes in the area.

Doris North will be under permafrost while the Connector and Central zones at Doris will be beneath the lake. A portion of the Madrid North deposit (part of Naartok) as well as the Madrid South deposits (Patch and Wolverine) are situated beneath the lakes and therefore will not be under permafrost conditions.

The deposits will be accessed, and services will be provided by a decline from surface with an average grade of 13%. The ramp will also be used for ore and waste haulage from the underground operations.

The Doris deposit is currently in production, with an existing ramp decline reaching active mining areas. Mining will continue as per current methods until depletion. Transverse and longitudinal longhole mining is planned for Doris. Madrid North (Naartok and Suluk) and Boston will be mined using longhole stoping methods with sub-levels placed at 20-m vertical intervals (16-m dr ........

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From 2015 to 2017, ore produced by the Doris Mine was stockpiled while the first concentrator line of the Doris Plant was constructed. Construction of the first concentrator line of the Doris Plant was completed in December 2016 and commissioning completed in June 2017. The first concentrator line provided the Doris Plant with a capacity of 1,000 t/d. The Doris Plant capacity was upgraded to 2,000 t/d when the planned second concentrator line was completed in August 2018. The Doris Plant initially consisted of two Python concentrator lines followed by a concentrate treatment plant (CTP) which produces gold dore bars for sale. The Doris Plant has been upgraded from its original design with expanded gravity recovery and leach scavenger capabilities.

ORIGINAL DESIGN CRITERIA
- Concentrator availability was 92% (8,059 hours per annum), which included availability in the CTP.
- CL feed was 2 x 62.5 t/h (IPJ con bypassed mill), 9.8 g/t, 2 x 605 g/h Au.
- Plant thro ........