• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Canada
Casa Berardi Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
85 km N from La Sarre, Quebec, Canada

  Regional Office:
1010, 3e avenue
Val-d'Or
Quebec, Canada
J9P 1T3
Phone  ...  Subscription required
Fax819-874-3391
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Canada
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeOpen Pit / Underground
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
  • Transverse open stoping
  • Longitudinal stoping
Processing
  • Gravity separation
  • Inline Leach Reactor (ILR)
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life15 years (as of Jan 1, 2019)
Latest NewsHecla Announces 2020 Production and Cash Position     January 13, 2021


Owners

Source: p. 41
CompanyInterestOwnership
Hecla Mining Company 100 % Indirect
Hecla Quebec Inc. 100 % Direct
Hecla Quebec Inc., Hecla’s wholly owned subsidiary, owns a 100% interest in the mineral titles and mining leases comprising the current Casa Berardi mine.

Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Sediment-hosted


Summary:

The Casa Berardi gold deposit can be classified as an Archean sedimentary-hosted lode gold deposit. Iron formations and iron rich sediments are present near the base of the sequence and appear on both sides of the Casa Berardi Fault zone. The presence of sulphur and iron in the environment is a factor which is highly favourable for gold mobilization.

Gold mineralization is essentially located in quartz veining, either in the form of plurimetric veins, small-scale veins, or veinlet networks. Veins are heterogeneous and contain a variable percentage of foliated enclaves showing a laminated appearance. Veins are of different colour, texture, and structure. Gold grades are generally correlated with increasing complexity. Different quartz phases have been recognized in mineralized veins to show the following sequence:
Phase 1: grey quartz, with abundant sulphides and fluid inclusions, comprising more than 50% of mineralized veins.
Phase 2: mosaic micro-crystalline quartz occurring in higher grade portions of veins.
Phase 3: non-mineralized coarsely crystallized white quartz which cuts the two others.

The gold bearing vein filling is rarely massive, but often brecciated, micro-brecciated, or laminated. The fracture planes are rich in graphite and muscovite. Veins contain only minor sulphides (1% to 3%), including mainly arsenopyrite, pyrite, and traces of sphalerite, chalcopyrite, pyrrhotite, tetrahedrite, galena, and gold. Arsenopyrite is the main gold bearing sulphide present in all veins of the deposit.

The granulometric distribution of gold is similar for all locations. According to petrographic compilations, 50% of the gold particles have an average diameter less than 30 µm, and approximately 3% are > 100 µm. The gold distribution inside the mineral assemblage varies slightly according to the mineralized zones. In the West Mine area and 113 Zone, the vein mineralization, which is related to the Casa Berardi Fault, shows that gold is mostly free and in contact with arsenopyrite grains (< 10 µm to 0.5 mm). Arsenopyrite is associated with sphalerite and tetrahedrite in clusters, joints, and in micro-brecciated areas. In the South West Zone, the Principal Zone, and some areas of the East Mine, where the mineralization is not related to the Casa Berardi Fault, the gold distribution is variable and depends on the amount of sulphides in quartz veins and host rocks. Fifty percent (50%) of gold grains that have been observed are inclusions in pyrite and arsenopyrite crystals.

In the West Mine, an albite-sericite assemblage is observed in metasomatized ultramafic dykes below the 400 m level. Those dykes, enclosed in graphitic mudrocks, are associated with the gold bearing quartz vein system. Sulphidation is an important part of the mineralization process in iron environments, such as the carbonated chert-magnetite iron formations and primary massive pyrite lenses in Zone 25-8, where magnetite is pervasively replaced by pyrite with coeval arsenopyrite crystallization.

Stockworks are the second style of gold mineralization in the deposit and represent nearly the same volume as the large quartz veins. The stockworks are low grade and largely unexploited. Across the deposit, hanging wall stockworks are present in contact with important mineralized quartz veins. Between 10% and 20% of the rock volume is composed of centimetre- to decimetre-thick quartz veins with gold values ranging from 1 g/t to 10 g/t. Veins of all textures and composition are concordant with host rocks. Foliated and finely bedded rocks are cut by concordant veins. Less deformed basalts or heavily carbonated iron-rich rocks are cut by fracture-controlled vein sets.

At the deposit scale, the Principal Zone and the East Mine zone areas correspond to the stockworks surrounding quartz cores. The stockworks are not limited to the fault and can affect the total width of the deformation zone. They appear as a superposition of metre to decametre wide mineralization subzones.

In the Principal Zone, the stockwork extends laterally for 400 m at a 50° western plunge. In the East Mine, the mineralized system extends laterally also for 400 m, reaching a depth of 800 m down the dip. The system crosses the Casa Berardi Fault at a low angle over a 100 m stripe. Mineralization continues laterally westward on the south side of the fault and eastward on the north side of the fault.


Mining Methods

  • Truck & Shovel / Loader
  • Transverse open stoping
  • Longitudinal stoping


Summary:

The project consists of an underground mine and the East Mine Crown Pillar open pit mine. The underground mine has two shafts; the West Mine shaft reaching a vertical depth of 1096 meters, and the unused East Mine shaft located 4.3 kilometers to the east, and going down to a vertical depth of 379 meters. A system of declines and drifts connecting both shafts provide access and underground services to ore zones.

The underground mine at Casa Berardi is a trackless mine accessed by declines and a shaft, which produces approximately 2,300 tons of ore per day. The mining methods are longhole transversal stoping in 10 metres or more mineralization width, and longitudinal retreat stoping in narrower ore bodies. The mineralized zones put in reserves are of varying thickness, ranging from a few tenths of meters to 3 metres, which is the minimum mining width. Most of the hanging walls are sub-vertical (55° to 85°), with typically the graphitic Casa Berardi fault at the footwall.

Stripping and development of the EMCP pit is planned to take place over five stages. The first stage was completed in the first half of 2016, and processing of ore from the EMCP pit began in July 2016. Stripping and development has been ongoing. The EMCP pit, as currently designed, is a smaller scale operation using conventional open pit mining methods, and is expected to run for approximately 5.5 years of production. The average amount of material to be moved every six months is anticipated to be approximately 160,000 to 260,000 tons of ore, with variable quantities of waste.

The Principale Zone open pit, as currently designed, would be mined using conventional open pit mining methods. The Principale Zone open pit is expected to commence production after the EMCP pit is depleted and to run for approximately 4 full years of production. The average amount of material to be moved every six months is expected to approximate 450,000 tons of ore, with variable quantities of waste.


Crushing and Grinding


Processing

  • Gravity separation
  • Inline Leach Reactor (ILR)
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

Ore is hauled by truck from the West Mine headframe complex to the crusher dump pocket, which is equipped with a static grizzly and a pneumatic hammer to break any oversize material. Ore passing the grizzly is screened again on the scalping screen. The oversize ore is fed to a jaw crusher and its discharge rejoins the scalping screen undersize. The crushed ore is stored in the ore storage bin.

Ore is conveyed from the storage bin to the semi-autogenous (SAG) mill. The SAG mill operates in closed circuit with the SAG screen. The SAG mill discharges into the SAG screen pump box and is pumped onto the SAG screen. The SAG screen oversize material is returned to the SAG mill for further reduction and the screen undersize flows to the primary cyclone pump box. The mill feed is sampled on the SAG screen undersize stream.

The ball mill operates in closed circuit with the primary and secondary cyclones. The ball mill discharges in the primary cyclones pump box. The primar ........

Recoveries & Grades:

CommodityParameter2019201820172016201520142013
Gold Head Grade, oz/ton 0.120.140.140.170.170.170.18
Silver Head Grade, oz/ton 0.030.030.030.040.040.030.04

Production:

CommodityUnits202020192018201720162015
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required156,653145,975127,891
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required997,579 tons844,090 tons827,580 tons
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required2,726 tons2,313 tons
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (UG) 974 k tons Gold 0.16 oz/ton 156 koz
Proven In-Situ (OP) 5,873 k tons Gold 0.08 oz/ton 447 koz
Probable In-Situ (UG) 1,978 k tons Gold 0.15 oz/ton 305 koz
Probable In-Situ (OP) 11,802 k tons Gold 0.07 oz/ton 809 koz
Proven & Probable In-Situ (UG) 2,952 k tons Gold 0.16 oz/ton 461 koz
Proven & Probable In-Situ (OP) 17,675 k tons Gold 0.07 oz/ton 1,257 koz
Measured In-Situ (UG) 1,841 k tons Gold 0.15 oz/ton 273 koz
Measured In-Situ (OP) 193 k tons Gold 0.02 oz/ton 4 koz
Indicated In-Situ (UG) 4,463 k tons Gold 0.14 oz/ton 631 koz
Indicated In-Situ (OP) 3,341 k tons Gold 0.05 oz/ton 155 koz
Measured & Indicated In-Situ (UG) 6,304 k tons Gold 0.14 oz/ton 904 koz
Measured & Indicated In-Situ (OP) 3,534 k tons Gold 0.04 oz/ton 158 koz
Inferred In-Situ (UG) 2,485 k tons Gold 0.19 oz/ton 471 koz
Inferred In-Situ (OP) 11,724 k tons Gold 0.04 oz/ton 498 koz

Commodity Production Costs:

CommodityUnits20202019201820172016
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required -3.92 / oz -3.92 / oz
Cash costs Gold USD  ......  Subscription required  ......  Subscription required 823.52 / oz 767.9 / oz
Cash costs Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required† 819.6 / oz† 763.98 / oz†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required 1,178 / oz 1,248 / oz
All-in sustaining costs (AISC) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required† 1,174 / oz† 1,244 / oz†
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2019201820172016
Combined mining costs ($/ton milled) USD 79.374.479.589.3
Processing costs ($/ton milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2019201820172016201520142013
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 35.3   48.6  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -1.56   11.8   -15.71  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.87   17.8   1.27  
Subscription required - Subscription is required


Heavy Mobile Equipment as of April 1, 2019:
HME TypeModelSizeQuantity
Bulldozer ....................... Subscription required 1
Bulldozer ....................... Subscription required 1
Drill ....................... Subscription required 3
Drill ....................... Subscription required 1
Drill (long hole) 5
Drill jumbo (single boom) 2
Drill jumbo (two boom) 5
Excavator ....................... Subscription required 1
Excavator ....................... Subscription required 2
Excavator ....................... Subscription required 1
Excavator ....................... Subscription required 2
Excavator ....................... Subscription required 2
Grader ....................... Subscription required 1
Grader 3
Loader ....................... Subscription required 1
Loader ....................... Subscription required 1
Load-Haul-Dump (LHD) ....................... Subscription required 12
Load-Haul-Dump (LHD) ....................... Subscription required 3.5 cu. yd 2
Load-Haul-Dump (LHD) ....................... Subscription required 1
Truck (haul) ....................... Subscription required 11
Truck (haul) ....................... Subscription required 10
Truck (haul) ....................... Subscription required 10
Truck (water) 1
Underground truck ....................... Subscription required 2
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2020
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Form 10-K 2017
Corporate Presentation 2016
Form 10-K 2016
Annual Report 2015
Form 10-K 2015
Annual Report 2014
Technical Report 2011
Subscription required - Subscription is required.

News:

NewsDate
Hecla Announces 2020 Production and Cash Position January 13, 2021
Hecla Is Restarting Casa Berardi April 14, 2020
Hecla Complies With the Quebec Government COVID-19 Order March 24, 2020
Hecla Reports Record Silver, Lead and Zinc Reserves February 5, 2020
Hecla Expands High-Grade at Casa Berardi’s East Mine November 5, 2019
Hecla Reports New High-Grade at Casa Berardi and Expanding Near-Surface Oxide Resource at San Sebastian August 6, 2019
Hecla Files NI 43-101 Technical Reports on Greens Creek and Casa Berardi Mines April 1, 2019
Hecla Reports 10.4 Million Ounces of Silver and 262,103 Ounces of Gold Production in 2018 January 15, 2019

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.