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Canada
Heva-Hosco (Joanna) Project

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 Location:
21 km E from Rouyn-Noranda, Quebec, Canada

  Project Contacts:
800 West Pender Street Suite 970
Vancouver
British Columbia, Canada
V6C 2V6
Phone  ...  Subscription required
Fax604-682-6215
EmailEmail
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Overview

StageFeasibility
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life13 years (as of Jan 1, 2012)
Annual intervention permits for exploration in place along with authorization for road building.


Owners

Source: p. 85,147
CompanyInterestOwnership
Hecla Mining Company 100 % Indirect

Contractors

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Deposit Type

  • Vein / narrow vein
  • Sediment-hosted
  • Orogenic


Summary:

The east-west striking zone favourable for gold mineralization is closely related to the Cadillac fault, which dips 55o to the north in this area. According to traditional nomenclature it is underlain from south to north by rocks of the Pontiac, Temiskaming and Cadillac groups. The east-west striking zone favourable for gold mineralization is closely related to the Cadillac Fault, which dips 55 degrees to the north in this area. The main 10 to 20 metres-wide brittle structure, composed essentially of chloritic schist, is included in a much broader ductile deformation zone that goes from about 100 metres north of the fault to more than 500 metres south of it. In general, the principal foliation is conformable to the fault zone and bedding. A tight asymmetric folding pattern with fold hinges gently plunging toward the west is developed in conglomerate units south of the fault.Deformation within the sediments can be difficult to evaluate as a result of re-crystallization of some minerals at superior greenschist to amphibolite facies metamorphism. Some sediment intervals show mineral segregation in a tectonic fabric and sulfides remobilization along foliation planes indicating a strong ductile deformation level. Vein folding and orientation within the different types of zone suggest a gradual decrease in deformation intensity from the Cadillac Fault to the south. Gold mineralization of the Hosco-Heva area is distributed in multiple lenses on both sides of the Cadillac Fault, ma ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining of the Joanna Hosco deposit will follow the standard practice of an open-pit operation with conventional drill and blast, load and haul cycle using a drill/truck/shovel mining fleet. The overburden and waste rock material will be hauled to the designated overburden and waste disposal areas. The run-of- mine ore will be drilled, blasted and loaded by hydraulic shovels and delivered by trucks to the primary crusher or stockpile near the crusher. Mining operations will support the nominal milling throughput rate of 8,500 tpd.

The slope configuration in overburden is based on LEQ’s recommendations. The pit slopes and benching arrangement in fresh rock are based on Golder’s recommendations (Golder, 2009). For the rock slopes, Golder recommends the following:

- Bench face angle (BFA) of 65° and inter-ramp angle (IRA) of 49° for Northeast to Northwest walls (including the South wall) and BFA of 70° and IRA of 53° for the North wall.

- At the current study level, it would not be appropriate to apply the recommended slope angles over extended wall heights due to the uncertainty regarding fabric continuity inherent in slope designs, based upon drillhole information. It is therefore recommended that flexibility be added to the designs by the sub-division of the final and phase walls into a series of bench stacks, no greater than 120 m high, separated by either haul road traverses or the inclusion of “geotechnical” berms at 100 m – 120 m vertical i ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 1091,454
All production numbers are expressed as metal in doré.

* According to 2012 study.

Reserves at December 31, 2022:
Measured, indicated and inferred resources at Heva and Hosco are based on $1,500/oz gold. Resources are without dilution or material loss at a gold cut-off grade of 0.01 oz/ton for open pit and 0.088 oz/ton for underground. Metallurgical recovery: Heva: 95% for gold, Hosco: 87.7% for gold.

CategoryTonnage CommodityGradeContained Metal
Indicated 30,553 k tons Gold 0.04 oz/ton 1,278 koz
Inferred 20,513 k tons Gold 0.04 oz/ton 879 koz

Commodity Production Costs:

CommodityUnits
Cash costs Gold USD 716 / oz *  USD
Assumed price Gold USD 1,350 / oz *  USD
* According to 2012 study / presentation.
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Operating Costs:

Units2022
OP mining costs ($/t mined) CAD 11.9 *  CAD
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2012 study.
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2012 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 508.3
Refining and transportation $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 0% $M CAD  ......  Subscription required
Pre-tax NPV @ 5% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
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Pipelines
Source: Subscription required


Proposed Heavy Mobile Equipment as of December 31, 2012:
HME TypeSizeQuantity
Dozer 354 HP ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
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Corporate Filings & Presentations:

DocumentYear
Press Release 2023
Form 10-K 2022
................................... Subscription required 2019
Year-end Mineral Reserves 2018
Annual Report 2017
Corporate Presentation 2013
Feasibility Study Report 2012
Preliminary Economic Assessment 2008
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