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Canada
Moroy-Bachelor Mine

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 Location:
199 km NE from Val-d'Or, Quebec, Canada

  Address:
2872, Sullivan Road, suite 2
Val-d'Or
Quebec, Canada
J9P 0B9
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Fax+1 (819)825-1222
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Sub-level stoping
  • Longhole stoping
Production Start...
The Bachelor Mine is currently under care and maintenance. The Moroy deposit is connected to the Bachelor Mine via an underground drift and hosts mineralization from surface.

Underground infrastructure Bachelor-Moroy Mine to be placed on long-term care and maintenance.

Bachelor Mill Complex is expected to commence processing 800-1,200 tpd for Barry Open Pit in Q3 2023.


Owners

Source: p. 34
CompanyInterestOwnership
Bonterra Resources Inc. 100 % Indirect

Contractors

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Deposit Type

  • Hybrid
  • Breccia pipe / Stockwork


Summary:

The Bachelor-Desmaraisville Property is situated near the western limit of the Chibougamau-Chapais Greenstone Belt (CCGB). The following description is taken from Darling and Lafontaine (2011).

The mafic to felsic volcanic and volcanoclastic rocks of the Bachelor Lake area are part of the basal mafic dominated sequence referred to as the Volcanic Cycle I (Mueller et al., 1989). The Volcanic Cycle I formed between 2,730 Ma and 2,720 Ma (Mortensen, 1993), and is composed of massive, pillowed, and brecciated, tholeiitic basalt flows with local felsic and sedimentary units. The NVZ of the Abitibi Subprovince is interpreted as a diffuse arc passing laterally into a back-arc environment with numerous felsic and mafic-felsic edifices (Chown et al., 1992) and intra-arc sedimentary basins (Mueller et al., 1996).

The Bachelor-Desmaraisville Property is underlain by Archean volcanic rocks of the Obatogamau Formation in a poorly known and relatively poorly explored area of the AGB. Based on the absence of marker horizons and the paucity of outcrops, it is difficult to establish a well-defined rock sequence in the Coniagas-Bachelor Lake area (Doucet et al., 1998). The Obatogamau Formation includes mafic, intermediate, and felsic flows, and synvolcanic intrusive equivalents which are the host for the volcanogenic massive sulphide occurrences (e.g., Coniagas). The stratigraphic sequence includes the 280 m thick Coniagas Mine sequence composed of a mafic dominated volc ........


Mining Methods

  • Sub-level stoping
  • Longhole stoping


Summary:

The orebody has very competent host rocks and low cost longhole stoping is a good choice for the mining method.

Once the stopes were identified, it was possible to determine the development needed to mine these stopes. The width of the mineralized zones varies considerably. Some are as narrow as 1.2 metres (four ft) and other are more than 9.0 metres (30 ft) wide in some locations. Accordingly, it was decided that the ore should be extracted using sublevel stoping and longhole blasting (54 mm – 63.5 mm [2 ¹/8 inches - 2 ½ inches] blast hole diameter). It should be noted that the dip and continuity of the zones, as well as the quality of the vein walls, also suggest that this method could be used successfully. To obtain a high degree of accuracy (and thereby minimize dilution), the ideal drill-hole length of approximately 13.5 metres (45 ft) was used to determine the sublevel spacings.

The veins will be entirely excavated on every sublevel. This means that the width of a sublevel could also exceed 9.0 metres (30 ft). The walls of the sublevels have to be inclined according to the dip of the vein to minimize dilution. The height, on the other hand, must be kept at 2.74 metres (9 ft) to allow the longhole drilling equipment to have the necessary manoeuvring space. Métanor decided that Cavo 310 mucking machines would be needed to handle all the ore during excavation of these sublevels.

The sublevels will be excavated via service raises between t ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2017201620152014
Gold oz 34,85333,45040,06748,848

Operational Metrics:

Metrics2017201620152014
Tonnes milled 239,237 t232,603 t234,825 t240,026 t
Daily milling rate 750 t
Daily ore mining rate 750 t

Reserves at June 1, 2021:
Mineral Resources at Bachelor Mine are reported within underground constraining shaped and Mineral Resources at Moroy are reported using cut-off grades of 2.4 g/t Au and 3.0 g/t Au, as well as above grade-thickness values of 2.88 g/t Au metre and 3.6 g/t Au metre, domain dependent.

CategoryTonnage CommodityGradeContained Metal
Measured 126 kt Gold 5.43 g/t 22 koz
Indicated 767 kt Gold 5.64 g/t 139 koz
Measured & Indicated 894 kt Gold 5.57 g/t 160 koz
Inferred 614 kt Gold 5.27 g/t 104 koz

Commodity Production Costs:

CommodityUnits201720162015
Total cash costs (sold) Gold CAD 1,021 / oz†   1,212 / oz†   1,050 / oz†  
All-in sustaining costs (sold) Gold CAD 1,419 / oz†   1,208 / oz†  
All-in costs Gold CAD 1,539 / oz†   1,245 / oz†  
† Net of By-Product.

Financials:

Units20172016
Revenue M CAD 56.3   48.3  
Gross profit M CAD 11.4   -4.7  
After-tax Income M CAD -0.4   -2.5  
Operating Cash Flow M CAD 6.6   0.5  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2017
Management Discussion & Analysis 2017
Management Discussion & Analysis 2016
Preliminary Economic Assessment 2016
Press Release 2015
Press Release 2014
Technical Report 2011
Technical Report 2011
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