Canada

Bull River Mine

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Categories

Overview

Mine TypeUnderground
StageRestarting
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotBull River Property is currently in Care and Maintenance. Permitting in process to restart underground operations.

Bull River Mine (“BRM”) project is the highest-grade advanced underground copper mine in British Columbia. The mine is fully developed with over 22 kilometres of underground ramps, tunnels and raises accessing approximately 75% of the current Mineral Resource.

Ore Purchase Agreement in place with New Afton to supply up to 90,000 tonnes of pre-concentrated copper mineralization from the current 180,000 tonne stockpile. Material to be delivered over a period of two years. Final commissioning scheduled for March 2024.

Owners

SourceSource
CompanyInterestOwnership
Canadian Critical Minerals Inc. 100 % Indirect
Bul River Mineral Corporation (operator) 100 % Direct
The Bull River Mine Project will be operated through Bul River Mineral Corporation.

Contractors

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Deposit type

  • Vein / narrow vein

Summary:

Deposit Types The Bull River deposit has been described as a Churchill-type vein copper-silver deposit (Lefebure, 1996). The deposit type displays characteristics of relatively low tonnage (typically range from 10Kt to 1Mt) but high-grade (typically range from 1% to 4% Cu). Frequently occurring in Proterozoic-age extensional sedimentary basins, Churchill-type deposits are associated with rifting can comprise single vein to complicated vein systems that vary from centimetres to tens of metres in width and can extend hundreds of metres along strike and down dip. Commonly hosted in clastic metasediments, veins and vein systems are often spatially associated with mafic dykes and sills. The veins are generally associated with major faults related to crustal extension that controls the ascent of hydrothermal fluids to favourable sites for metal deposition. Fluids are believed to be derived from those mafic intrusives that are associated with the vein systems. Mineralization in Churchill-type deposits is predominantly chalcopyrite, pyrite, and chalcocite with subordinate pyrrhotite, galena, bornite, tetrahedrite, argentite, and covellite and is generally younger than the host lithology. Dilation of veins is commonly caused by cross-structures or folding and results in concentrations of mineralization. Likewise, the intersection of veins is a locus of ore deposition. Mineralization can occur as massive and/or semi-massive sulphides that may be identified as conductors by electromagnetic (EM) surveys. Mafic intrusive bodies and related structures can be defined by magnetic, very low frequency (VLF), or EM surveys. Alteration usually occurs within host rock in contact with veins and up to tens of metres from the veins with carbonization and silicification as typical alternation types in metasediments (BC MINFILE). Mineralization TheBull River Mine (BRM) mineralized zones comprise a vertical to subvertical network of sulphide-bearing quartz carbonate veins striking approximately east-west hosted in sheared and brecciated Aldridge Formation sediments. The vein systems form complex networks within, and adjacent to, the shear zone and often encompasses crushed, deformed, and brecciated host rocks (Baldys, 2001). Host rocks are either partly silicified and chloritized argillites, argillaceous quartzites and quartzites (Masters, 1990). The veins pinch and swell forming stockworks or thick tabular bodies that are often cut by smaller veins and stringers of quartz and quartz-siderite. The main vein structure and associated stringer zones can range from a few centimetres to 30m wide. In 1991, Masters defined five subparallel to en echelon “vein systems” and differentiated them from the Pit Zone that lies within the footwall (Masters, 1991). Mineralization consists of pyrite, pyrrhotite, and chalcopyrite with minor local galena, sphalerite, arsenopyrite, and cobaltite and traces of tetrahedrite and native gold. Sulphides range from massive, irregular bodies within the vein system to thin discontinuous veins, veinlets, and disseminations in the host rock (Höy et al., 2000). Gangue mineralogy of the veins is variable, with the eastern parts of the deposit consisting of quartz and siderite. The western part of the vein system is dominated by siderite (Baldys, 2001). A plan view of the modelled mineralized vein system is illustrated in Figure 7-4. The extent of the currently known mineralization is approximately 1,200m along strike, varies in width from 2.5m to 30m and has a down-dip extent of up to 450m based on currently drilling, which remains open at depth. The sub-parallel system is continuous within each of the ten illustrated veins.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

Operational metrics

Metrics
Daily milling capacity  ....  Subscribe
* According to 2022 study.

Production Costs

Commodity production costs have not been reported.

Operating Costs

Currency2021
Processing costs ($/t milled) CAD 19.3 *  
G&A ($/t milled) CAD  ....  Subscribe
* According to 2021 study.

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required Apr 3, 2023

Total WorkforceYear
...... Subscription required 2021

Aerial view:

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