Overview
Stage | Preliminary Economic Assessment |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Longhole stoping
- Longitudinal retreat
- Transverse stoping
- Cemented rockfill
|
Mine Life | 3.7 years (as of Jan 1, 2015) |
Douay Project is one of Quebec’s Largest Undeveloped Gold Resources.
The Douay Project resource remains open in multiple directions laterally with significant resource expansion potential.
Maple Gold and Agnico (50/50 JV between Maple Gold and Agnico) share a common vision for realizing the exploration potential at the Douay God Project.
JV targeting major discoveries with aggressive step-out and deep drilling. 3D model updates and target prioritization underway with next phase of drilling expected in 2024. |
Source:
p. 6
Douay is held by a 50/50 JV between Maple Gold and Agnico as per a JV Agreement (February 3, 2021) pursuant to which the parties formed a JV that incorporates Maple Gold’s Douay and Agnico’s Joutel projects into a consolidated JV property package.
Contractors
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Summary:
Gold mineralization on the Property includes a large, disseminated, pyritic, quartz-poor, structurally controlled style of mineralization. Collectively, this style of mineralization is best described as forming part of the Intrusive-Related Gold System (IRGS). The mineralized zones within and surrounding the locally porphyritic syenitic intrusive complex are likely related to the corresponding intrusive-hydrothermal system, and are predominantly controlled by rock permeability, created either by rheological contrasts between the different lithologies and their associated alteration and/or by deformation zones, particularly along lithological contacts.
Douay West Zone
The Douay West (DW) Zone is located five to thirty metres north of a graphitic fault zone. The mineralized zone extends over a strike distance of approximately one kilometre and trends 100°. The zone is composed of several sub-parallel bodies that trend from 90° to 100°, and dip from -55° to -65° to the south. The drilled thickness of each of the individual bodies ranges from less than one metre up to 65 m.
Gold bearing mineralization is associated with pyritized and altered zones (albitized, silicified, carbonatized, hematized) within mafic volcanic rocks and at the contact of a gabbroic intrusive. Leaching, albitization, carbonatization, and pyritization are the dominant alteration and mineralization patterns. Sericitization and/or ankeritization and weak hematization are present. Vis ........
Mining Methods
- Truck & Shovel / Loader
- Longhole stoping
- Longitudinal retreat
- Transverse stoping
- Cemented rockfill
Summary:
The PEA proposes a conventional truck and shovel open pit, followed by ramp access, long-hole open stoping in the underground mine.
Both the open-pit and underground operations will deliver material to a stockpile area near the crusher.
Since the LOM currently being contemplated is relatively short, the entire mining operation would be conducted on a contractor basis. The mining methods and production capacity have been chosen to match an ultimate milling throughput rate of 900 tonnes per day (“tpd”). This total will be composed entirely of feed from the open pit operation until the underground mine has been developed sufficiently to provide underground mill feed.
OPEN PIT
The proposed open pit would be run by an external mining contracting company who would utilize conventional, open pit mining equipment and drill/blast/load/haul technologies. Open pit mining would proceed as successive pre-strip and hard rock mining operations, and follow the trend of the mineralized deposit.
Hard rock pit slopes were assumed to be stable at a 45 degree inter-ramp slope. Reducing the cut-off lower than this grade effectively accelerated the incremental increase in the stripping ratio to undesirable levels.
The open pit mining dilution was estimated to be 16.3%, at a grade of 0.32 Au g/t. Mine extraction in the open pit mine is estimated to be 97%.
The ultimate pit would measure approximately 450 m long by less than 400 ........
A crusher/sizer facility will be installed near the rim of the pit to prepare the run-ofmine material for transport by highway trucks.
Summary:
The construction of an on-site processing facility would not be justified given the current estimates of the quantity of potential mill feed.
However, P&E is aware of several potential processing facilities within a moderate trucking distance, which may be amenable to accepting potential mill feed from the Douay West property. The closest facility is the Sleeping Giant mill. It is approximately 50 kilometres south of the Douay West project.
Initial tests indicate that gravity and flotation processes would not provide acceptable results. However, these tests did suggest that Douay West mill feed would react well to cyanidation and that it would be reasonable to expect a recovery of between 92% and 94%.
The lower value of 92% has been adopted for this study.
Recoveries & Grades:
Commodity | Parameter | Avg. LOM |
Gold
|
Recovery Rate, %
| 92 |
Gold
|
Head Grade, g/t
| 4.2 |
Source:
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Projected Production:
Commodity | Units | LOM |
Gold
|
oz
| 143,648 |
All production numbers are expressed as payable metal.
Operational Metrics:
Metrics | |
Daily milling rate
| 900 t * |
Annual ore mining rate
| 315,000 t * |
Stripping / waste ratio
| 12.1 * |
Waste tonnes, LOM
| 5.06 Mt * |
Ore tonnes mined, LOM
| 1.16 Mt * |
Total tonnes mined, LOM
| 6,220 kt * |
Tonnes milled, LOM
| 1.16 Mt * |
* According to 2015 study.
Reserves at March 17, 2022:
Potential open pit Mineral Resources are reported within a Whittle pit shell using an elevated cut-off grade of 0.45 g/t Au. The actual discard cut-off grade is lower at approximately 0.18 g/t Au.
Underground Mineral Resources are reported within constraining shapes using a cut-off grade of 1.15 g/t Au based on a C$63.00/t underground mining cost and include low grade blocks situated within the shapes.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Indicated
|
In-Situ (OP)
|
10 Mt
|
Gold
|
1.59 g/t
|
511 koz
|
Indicated
|
Total
|
10 Mt
|
Gold
|
1.59 g/t
|
511 koz
|
Inferred
|
In-Situ (OP)
|
68.2 Mt
|
Gold
|
0.94 g/t
|
2,065 koz
|
Inferred
|
In-Situ (UG)
|
8.5 Mt
|
Gold
|
1.68 g/t
|
460 koz
|
Inferred
|
Total
|
76.7 Mt
|
Gold
|
1.02 g/t
|
2,525 koz
|
Corporate Filings & Presentations:
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