Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Room-and-pillar
- Continuous
|
At Colonsay, production was temporarily halted in December 2022. And restarted in July 2023.
The Mosaic Company have the ability to reach an annual operating capacity of 2.1 million tonnes over time at Colonsay by increasing our staffing levels and investment in mine development activities. |
Source:
p. 44
Company | Interest | Ownership |
The Mosaic Company
|
100 %
|
Indirect
|
Mosaic Potash Colonsay ULC
(operator)
|
100 %
|
Direct
|
Colonsay Potash Facility is 100% owned by Mosaic Potash Colonsay ULC, a wholly-owned, indirect subsidiary of Mosaic.
Contractors
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Summary:
The intracratonic Elk Point Basin is a major sedimentary geological feature in western Canada and the northwest U.S. It contains one of the world’s largest stratabound potash resources that represents almost 25% of the global potash production. The Prairie Evaporite hosts rich deposits of evaporite minerals including NaCl, KCl and locally, carnallite that occur in three potash deposits: the Esterhazy, Belle Plaine and Patience Lake members.
The Colonsay deposit includes two potash-bearing members within its local stratigraphy; the Patience Lake Member and the Belle Plaine Member. Mining at Colonsay is conducted within the upper portion of the Patience Lake Member.
The Patience Lake member is mined at Colonsay. The particular beds mined at Colonsay and Esterhazy have a mining height of 11 and 8 feet, respectively.
Mining Methods
- Room-and-pillar
- Continuous
Summary:
Colonsay utilizes shaft mining. Traditional potash shaft mining takes place underground at depths of over 1,000 meters where continuous mining machines cut out the ore face and load it onto conveyor belts. The ore is then crushed, moved to storage bins and hoisted to refineries above ground.
Mining at Colonsay is conducted within the upper portion of the Patience Lake Member using a room and pillar mining method.
Source:
Summary:
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Reserves at December 31, 2023:
No cut-off grade or value based on commodity price is used to estimate mineral resources and resources as the mining method used at Colonsay is not grade selective.
Category | Tonnage | Commodity | Grade |
Proven
|
101 Mt
|
K2O
|
25.2 %
|
Probable
|
163 Mt
|
K2O
|
27.2 %
|
Proven & Probable
|
264 Mt
|
K2O
|
26.5 %
|
Inferred
|
977 Mt
|
K2O
|
29 %
|
Corporate Filings & Presentations:
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