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Canada
Eleonore Mine

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 Location:
230 km NE from Fort-Rupert, Quebec, Canada

  Address:
1751, rue Davy
Rouyn-Noranda
Quebec, Canada
J9Y 0A8
Phone  ...  Subscription required
Fax819-764-6543
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Open stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Paste backfill
Processing
  • Gravity separation
  • Flotation
  • Inline Leach Reactor (ILR)
  • Concentrate leach
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life10 years (as of Jan 1, 2017)


Owners & OPERATOR

Source: p. 19
CompanyInterestOwnership
Newmont Corp. 100 % Indirect
Les Mines Opinaca Ltée. (operator) 100 % Direct
The operating entity is Les Mines Opinaca Ltée., a wholly-owned subsidiary of Goldcorp Inc.

Deposit Type

  • Breccia pipe / Stockwork
  • Sediment-hosted


Summary:

The Éléonore Operations host the Roberto gold deposit, which includes the Roberto, East Roberto, and Zone du Lac lenses.

The Roberto deposit is considered to have many aspects in common with classic greenstone hosted quartz–carbonate vein deposits, but represents a clastic sediment-hosted stockwork-disseminated end member.

Features of the deposit that indicate it is part of the greenstone-hosted quartz–carbonate vein deposit continuum include:

• Spatially associated with major crustal features developed in deformed greenstone rocks; mineralization is considered to pre-date the final deformation phase;
• Associated with large, district-scale carbonate alteration;
• Gold mineralization hosted in laminated fault-fill quartz–carbonate veins of varying thicknesses;
• Association of gold with arsenopyrite, löllingite, pyrrhotite and pyrite.

The sulphide concentration within the mineralized zones varies between 1% and 5%, and primarily consists of arsenopyrite, löllingite, pyrrhotite and pyrite. The “waste” rock may contain sulphides, usually pyrrhotite, but this is in lesser amounts, from trace to 2%, and occurs mostly in the structural hanging wall.

The mineralized zones are generally 5 m to 6 m in true thickness, varying between 2 m and more than 20 m locally. Mineralization is considered to pre-date the final deformation phase (Ravenelle et al, 2010).

The mineralized zones are folded with increased thicknesses in the hinge of the folds while limbs are fairly straight and continuous. Transposition of the sedimentary beds post-mineralization may also explain some of the thickening of the mineralized zones.

The Roberto gold zones dip steeply to the east and rake (plunge) steeply to the northeast. All zones remain open at depth and along strike.


Mining Methods

  • Open stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Paste backfill


Summary:

Open stope mining (down-hole drilling) and longitudinal retreat with consolidated backfill (paste backfill mixed with crushed waste rock) is utilized. A transverse open stope approach is used where the mineralized lenses are wider than 7 metres.

For mine scheduling purposes, the vertical extent of the orebody is subdivided into two parts: the upper part of the orebody located between 65 metres and 650 metres below surface (Upper Mine), and the lower part of the orebody located between 650 metres and 1,190 metres below surface (Lower Mine). Dividing the orebody into two parts has accelerated the production start-up.

Mining started from the 440 metre level and the 650 metre level. Production will be at the nominal rate of 5,000 tonnes per day with four mining horizons starting on the 230 metre level, 440 metre level, 650 metre level and 800 metre level. At this stage, it is expected that all the ore and waste of horizon 1 (65 metre level to 230 metre level) will be trucked to the surface; the ore and waste of horizons 2, 3 and 4 (230 metre level to 800 metre level) is hoisted up the production shaft.

Studies to increase and sustain the production rate will be conducted as more drilling information becomes available. Based on the current Mineral Reserves, the planned operation has a 10-year mine life. The mine plan is under evaluation for including the mining of the zone above 55 metres below surface (crown pillar recovery project), however economics do not currently support including this into mineral reserves.

The ramp is currently used as the air exhaust and will continue to do so when completed. The main ventilation raise is the Gaumond shaft. From the shaft, the air is distributed into two internal ventilation raises, one located in the North Zone and one in the South Zone, each of which will bring fresh air to work places. Currently, ventilation on demand is partly operational, and once completed it will help to reduce this preliminary estimation.

Stope widths vary between 2.5 metres and 20 metres. Stopes have a maximum length of 25 metres, and can reach a height of 30 metres. Ground support consists of various combinations of rebar bolts, friction bolts, cables, screen and shotcrete depending on the rock quality and particular requirements of each heading.

Stopes are backfilled with paste fill. Unconsolidated backfill is used wherever is possible in order to avoid hoisting waste rock to the surface. The current paste backfill mixture consists of 70% mill tailings, 25% fine sulphide concentrate, and between 4% to 7% binder. The sulphide tailing concentration can be up to 25% without having effect on the paste strength. Crushed waste is typically added to the fill, so the percentage of the mill tailings decreases.

A fully-mechanized mining equipment fleet is used. Equipment includes scoop trams, dump trucks, mine service and personnel vehicles, jumbo drills, bolting platforms, scissor lifts, land cruiser and forklifts.

There is potential to extend the mine life and potentially sustain the 7,000 tonnes per day throughput rate if some or all of the Inferred Mineral Resources identified within the life-of- mine production plan can be upgraded to higher confidence Mineral Resource categories, and eventually converted to Mineral Reserves. Mineralization remains open at depth, with the deepest drill hole encountering mineralization at 1,400 metre depth; the current mine plan extends to 1,190 metre depth.


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation
  • Inline Leach Reactor (ILR)
  • Concentrate leach
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The Éléonore plant uses conventional mineral processing equipment to produce a marketable gold doré.

The process flowsheet is standard, consisting of three stages of crushing, grinding, gravity concentration, sulphides flotation, cyanide leaching, and gold recovery in a CIP circuit.

The plant capacity is controlled by the underground mine capacity. The plant initially operated at 3,500 t/d. The crushing area is designed for a capacity of 8,500 t/d including waste crushing (1,500 t/d), and the other plant areas were designed for a processing capacity of 7,000 t/d.

The comminution process consists of three stages of crushing followed by a single stage ball mill grinding. The primary crusher (jaw crusher), the secondary crusher (standard cone crusher) and tertiary crushers (two short-head cone crushers will be required for a 7,000 t/d throughput rate) are located on the surface. The fine crushed ore is ground by a single stage ball mill in a closed circu ........

Recoveries & Grades:

CommodityParameter2018201720162015
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 6.175.675.485.91
Subscription required - Subscription is required.

Production:

CommodityUnits20192018201720162015
Gold koz  ......  Subscription required  ......  Subscription required305274268
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2018201720162015
Tonnes milled  ......  Subscription required  ......  Subscription required1,688 kt1,706,700 t
Daily milling capacity  ......  Subscription required  ......  Subscription required7,000 t
Annual milling capacity  ......  Subscription required  ......  Subscription required2.55 Mt
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,688 kt1,381 kt
Daily ore mining rate  ......  Subscription required  ......  Subscription required4,650 t
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 1,500 kt Gold 5.69 g/t 280 koz
Probable 5,900 kt Gold 5.21 g/t 1,000 koz
Proven & Probable 7,400 kt Gold 5.31 g/t 1,280 koz
Measured 300 kt Gold 4.39 g/t 40 koz
Indicated 2,500 kt Gold 4.57 g/t 370 koz
Measured & Indicated 2,800 kt Gold 4.55 g/t 410 koz
Inferred 3,400 kt Gold 5.21 g/t 580 koz

Commodity Production Costs:

CommodityUnits20192018201720162015
Total cash costs (sold) Gold USD  ......  Subscription required†
Total cash costs Gold USD  ......  Subscription required† 841 / oz† 875 / oz† 911 / oz†
All-in sustaining costs (sold) Gold USD  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required† 1,095 / oz† 981 / oz† 1,007 / oz†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20162015
UG mining costs ($/t mined) USD 65.273.6
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 142  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 259  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -476  
Subscription required - Subscription is required


Heavy Mobile Equipment as of November 30, 2018:
HME TypeModelQuantity
Backhoe ....................... Subscription required 2
Cassette Truck ....................... Subscription required 3
Deck & Boom Trucks ....................... Subscription required 6
Drill (long hole) ....................... Subscription required 4
Grader ....................... Subscription required 2
Jumbo ....................... Subscription required 6
Loader ....................... Subscription required 1
Loader ....................... Subscription required 1
Scissor Lift ....................... Subscription required 8
Scoop Tram ....................... Subscription required 10
Trans Mixer ....................... Subscription required 2
Underground truck ....................... Subscription required 1
Underground truck ....................... Subscription required 3
Underground truck ....................... Subscription required 9
Underground truck ....................... Subscription required 1
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required 2018
Subscription required 2017
Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Information Form 2017
Annual Report 2017
Press Release 2017
Press Release 2017
Annual Information Form 2016
Annual Report 2016
Corporate Presentation 2016
Annual Report 2015
Technical Report 2015
Year-end Mineral Reserves 2015
Year-end Mineral Reserves 2014
Technical Report 2012
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Aerial view:

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