Overview
Stage | Pre-Feasibility |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 12.6 years (as of Jan 1, 2024) |
The Courageous Lake is one of Canada largest undeveloped projects by gold resources.
The Courageous Lake Project includes two deposits: the Courageous Lake deposit, and the Walsh Lake deposit. Only the Courageous Lake deposit is used in the 2024 PFS.
2024 PEA demonstrating the potential to extend 2024 PFS mine life by an additional 15.9 years averaging over 200k ounces of gold production per year. |
Latest News | Seabridge Gold Files Updated NI-43-101 Courageous Lake Technical Report February 29, 2024 |
Source:
p. 1
Courageous Lake project is 100%-owned by Seabridge Gold Inc.
Seabridge assigned its right to its wholly owned subsidiary, Seabridge Gold (NWT) Inc.
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Deposit Type
- Epithermal
- Vein / narrow vein
Summary:
The Courageous Lake Project includes two deposits: the Courageous Lake deposit, and the Walsh Lake deposit. Only the Courageous Lake deposit is used in the 2024 PFS.
Deposit Types
The Courageous Lake deposit is a stratiform series of near-vertical, elongate lenticular mineralized domains hosted in Archean tuffaceous clastic rocks and ash-flow tuff. Gold mineralization is interpreted to be a product of an episodic, epithermal-like, submarine and subaerial, hydrothermal system.
Mineralization
Since its discovery, several common points have been used to describe the felsic ash tuff (FAT) deposit, including:
• A series of gold zones concentrated in long and narrow bands.
• The deposit is hosted by metasedimentary and metavolcanic rocks.
• Gold concentrations are associated with the introduction of silica, muscovite, and sulphide minerals.
The FAT deposit is located between the north shore of Matthews Lake and the south shore of Courageous Lake. It is made up of at least 13 discrete, steep east-dipping, elongate lenticular zones that vary in thickness from 20 to 125-m-wide. The continuity of these 13 zones has been demonstrated to be at least 1,900 m long, 800 m-wide and, although open at depth, at least 1200 m deep.
Summary:
The 2024 PFS Courageous Lake mine plan uses an open pit truck and shovel operation.
A PFS-level production schedule, based on an annualized average of 7,500 t/d mill feed rate, has been developed for the PFS. The resulting mine life is 12.6 years, after pre-production is completed.
Minimum Mining Width
A minimum mining width between pit phases is prescribed to maintain a suitable platform for efficient mining operations. This is established based on equipment size and operating characteristics. For this study, the minimum mining width generally conforms to 35 m, which provides sufficient room for 1-sided truck loading.
Bench Height
The pit designs are based on the digging reach of the excavators (10 m operating bench) with double benching between high wall berms; therefore, the berms are separated vertically by 20 m. Single bench mining will be employed, split bench mining (5m) will be used, where required, to maximize ore recovery and minimize dilution.
Lerch Grossman (LG) Phase Selection
The Courageous Lake pit has four incremental phases (1-4), and two satellite phases (0 and 99). Phases 0 and 99 are standalone phases and are designed to provide pre-production start-up and construction material, as well as a location for water storage when the Basal Cryopeg is mined, later in the mine life. Phase 1 is the one in the center of the ultimate pit, and provides low strip ratio, higher grade feed at the beginning mining. ........
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Flow Sheet:
Summary:
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Reserves at January 5, 2024:
Mineral Reserves are reported at NSR cut-off grade C$49.66/t.
Mineral Resources at a 0.80 g/t gold cut-off grade.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
2 Mt
|
Gold
|
3.5 g/t
|
0.2 M oz
|
Probable
|
31.9 Mt
|
Gold
|
2.6 g/t
|
2.6 M oz
|
Proven & Probable
|
33.9 Mt
|
Gold
|
2.6 g/t
|
2.8 M oz
|
Measured
|
6,007 kt
|
Gold
|
2.836 g/t
|
548 koz
|
Indicated
|
139,167 kt
|
Gold
|
2.335 g/t
|
10,449 koz
|
Measured & Indicated
|
145,174 kt
|
Gold
|
2.356 g/t
|
10,997 koz
|
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