Overview
Status | Care and Maintenance |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Cut & Fill
- Vertical block mining (VBM)
- Slot-Slash
|
The Birchtree Mine was placed on care and maintenance in the fourth quarter of 2017. |
Source:
p. 71
Company | Interest | Ownership |
Vale S.A.
|
100 %
|
Indirect
|
Contractors
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Summary:
The sulphide mineral deposits are associated with the ultramafic intrusions within the Pipe Formation, which is part of the Opswagan Group. The sulphide deposits occur as disseminated sulphides within the ultramafics, massive sulphide veins and lenses within the ultramafic and along the contact of the ultramafic with the Pipe Formation, and as massive sulphide veins and lenses within the Pipe Formation. All mineral reserves are contained within the latter two deposit types.
The stratigraphy at the Thompson Mine is overturned and dips 65 degrees to the west. The Archean Gneisses are located in the Thompson Mine hanging wall. Unconformably overlying the gneisses are quartzite, schist, nickel mineralization, calcareous marbles and iron formation. Amphibolite dykes and pegmatites crosscut all lithologies. Ultramafic bodies (locally called peridotite) are associated with the nickel mineralization in areas of Thompson Mine. The majority of sulphide mineralization at the Birchtree Mine is Ultramafic Associated Deposits.
Deposits are generally classified as to their spatial relationship of the mineralization to ultramafic bodies:
Metasedimentary Hosted Deposits
The structurally controlled dilation sulphide matrix mineralized zones are contained within the P2 Schist. Inclusions of wall rocks and ultramafics are common in the massive sulphide. The mineralization is linear and more predictable with widths ranging from 0.3 m to 60 m. Pinch and swe ........

Mining Methods
- Cut & Fill
- Vertical block mining (VBM)
- Slot-Slash
Summary:
Mining methods primarily use Vertical Block Mining (VBM), a Slot-Slash Method, with vertical blocks averaging 100 ft in height, and Cut and Fill mining. The ore is crushed underground to -15 cm and shipped to the concentrator.
Source:
Summary:

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Combined production numbers are reported under
Manitoba Operation
Operational Metrics:
Metrics | 2017 | 2016 | 2015 | 2014 | 2013 |
Ore tonnes mined
| 329 kt | 503 kt | 564 kt | 545 kt | 613 kt |
Mine Management:
Job Title | Name | Profile | Ref. Date |
.......................
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.......................
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|
Jun 2, 2022
|
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Corporate Filings & Presentations:
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