Overview
Stage | Restarting |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 4.8 years (as of Jan 1, 2022) |
On June 13, 2022, Bonterra Resources Inc. released the highlights on an independent preliminary economic assessment (“PEA”) on the Barry open pit project in the Urban-Barry Camp in northern Quebec.
Open pit outlines the fastest and cheapest potential production re-start. |
Source:
p. 4
Bonterra acquired the Properties by virtue of a court-approved plan of arrangement completed on September 4, 2018, whereby Bonterra acquired all the issued and outstanding common shares of Metanor Resources Inc. (Metanor).
On January 1, 2020, the Company amalgamated the parent Company with its wholly owned subsidiary Metanor Resources Inc.
Contractors
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Summary:
The Properties are thought to be prospective for greenstone-hosted quartz carbonate vein gold deposits, intrusion related gold (IRGS) deposits, and volcanogenic massive sulphide (VMS) deposits (Darling and Lafontaine (2011), SGS (2019b)). The deposits at the Properties for which Mineral Resources have been estimated are characterized as Greenstone-hosted quartz carbonate veins typical of the northern portion of the Abitibi Subprovince of the Superior Province in northwestern Québec.
The Barry property is underlain by greenschist facies volcanic and intrusive rocks of tholeiitic affinity belonging to the UBGB. As there is limited outcrop exposure, the geology had to be deduced from drill holes data and geophysics. Geological mapping and diamond drilling identified a series of basaltic flows that are interpreted to cover over 90% of the Barry property. The only intrusive bodies identified on the Barry property were the quartz-feldspar porphyry in the area of the Barry I Main Zone Area and a series of gabbro sills to the north. A siltstone outcrop was identified approximately 300 m northeast of the Barry I Main Zone. Stratigraphic tops are to the southeast, as indicated by pillow facing directions. The rocks on the Barry property are overprinted by a weak to moderate northeast to southwest trending foliation (S2) that parallels regional shearing and contacts of the large granitic intrusions.
Mafic volcanic rocks are the most common rocks on the Barry prope ........
Summary:
The mineralized material extending from the surface to a depth of approximately 106 m for Pit 1 will be mined by conventional open pit methods. Pit 1 contains 91% of the open pit constrained Mineral Resource, with Pits 2 and 3 containing the balance which will be mined early in the life of mine (LOM). The stripping ratio has been estimated at approximately 5.37:1 over the LOM period. Mining has been carried out in the past, hence, bench faces are available to permit a rapid start-up. Waste rock material will be stockpiled at designated areas while mineralized material will require little stockpile area as this material will be transported to the process plant at the Bachelor mine site daily. Transport to the processing facility will be by contractor haulage using 50 t trucks via secondary gravel roads maintained for the purpose. Production is scheduled at 1,200 tpd for an average annual production of 420,000 t, while annual mined waste rock material will average 2.1 million tonnes (Mt). Bonterra plans to use contractor services for all aspects of open pit mining.
Drilling will be carried out on a two shift per day basis, requiring on average two drill rigs over the LOM, with an additional unit provided as required. Since the mineralized material will require long-distance haulage by a local contractor, initial good fragmentation of the mineralized material is very important to reduce potential damage to the contractor’s truck boxes. A crusher will be installed on s ........
Source:
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Flow Sheet:
Summary:
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Reserves at July 1, 2022:
Open pit Mineral Resources are reported within an optimized pit at a cut-off grade of 1.0 g/t Au, while underground Mineral Resources are reported within underground reporting shapes defined using a minimum thickness of 1.2 m and a cut-off grade of 2.6 g/t Au, limited to areas of continuous mineralization.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Measured
|
In-Situ (OP)
|
1,732 kt
|
Gold
|
2.66 g/t
|
148 koz
|
Measured
|
In-Situ (UG)
|
344 kt
|
Gold
|
4.94 g/t
|
55 koz
|
Measured
|
Total
|
2,076 kt
|
Gold
|
3.04 g/t
|
203 koz
|
Indicated
|
In-Situ (OP)
|
184 kt
|
Gold
|
2.87 g/t
|
17 koz
|
Indicated
|
In-Situ (UG)
|
2,839 kt
|
Gold
|
5.15 g/t
|
470 koz
|
Indicated
|
Total
|
3,023 kt
|
Gold
|
5.01 g/t
|
487 koz
|
Measured & Indicated
|
In-Situ (OP)
|
1,916 kt
|
Gold
|
2.68 g/t
|
165 koz
|
Measured & Indicated
|
In-Situ (UG)
|
3,183 kt
|
Gold
|
5.12 g/t
|
524 koz
|
Measured & Indicated
|
Total
|
5,099 kt
|
Gold
|
4.21 g/t
|
689 koz
|
Inferred
|
In-Situ (OP)
|
15 kt
|
Gold
|
2.36 g/t
|
1 koz
|
Inferred
|
In-Situ (UG)
|
4,364 kt
|
Gold
|
4.9 g/t
|
687 koz
|
Inferred
|
Total
|
4,379 kt
|
Gold
|
4.89 g/t
|
689 koz
|
Corporate Filings & Presentations:
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