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Canada
Willa Project

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 Location:
7.5 km S from Silverton, British Columbia, Canada

  Project Contacts:
900-570 Granville St.
Vancouver
British Columbia, Canada
B.C., V6C 3P1
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeUnderground
Commodities
  • Gold
  • Copper
  • Silver
Mining Method
  • Sub-level stoping
  • Longhole open stoping
Mine Life4 years (as of Jan 1, 2015)


Owners

Source: p. 11
CompanyInterestOwnership
Metallica Metals Corp. Indirect
On March 6, 2019, Cameo Cobalt Corp. (now Metallica Metals Corp.) acquired the Willa Property in British Columbia by entering into a Sale and Assignment Agreement with MX Gold Corp.

The Willa Project was fully impaired during the year ended April 30, 2019. During the year ended April 30, 2020, the Company terminated the agreement with the original Optionors of the Willa Property. The Company transferred the claims comprising the property back to the Optionors in exchange for the termination of the underlying agreements respecting the property, as well as the release of any further obligations or amounts owing thereunder.

Contractors

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Deposit Type

  • Porphyry
  • Epithermal
  • Volcanic hosted
  • Breccia pipe / Stockwork


Summary:

The Willa deposit is a sub-volcanic breccia hosted-type deposit (L01 – BC Mineral Deposit Profiles). This type of deposit represents a transition from porphyry copper to epithermal conditions with a blending of porphyry and epithermal characteristics. The porphyry units have intruded into the volcanic rocks and a pyrite,silica-rich mineralized stockwork breccia and closely-spaced sheeted veins with local massive to disseminated replacement zones have been imprinted on the sequence. The mineralization in these types of deposits is usually polymetallic and in the case of the Willa deposit contains significant gold, copper and silver.

Other deposit types on the Property are small in size compared to the Willa deposit and some may have been superimposed on the known mineralization. The primary focus of the historic exploration and development work on the Willa deposit is based on the sub-volcanic breccia- osted mineralization.Future exploration will continue to focus on this type of deposit.

The Elise Formation (“Elise”) of the Rossland Group, the oldest rocks on the Property, comprises about 75% of a roof pendant within the Nelson Batholith. The rocks range from volcanic siltstone and tuff to coarse breccias and flows. The metavolcanic roof pendant is cut by two felsic porphyritic intrusions. The first intrusion is a quartz latite porphyry ring-dyke and two radial dykes that have a central core of feldspar porphyry and a crosscutting breccia pipe. The sec ........


Mining Methods

  • Sub-level stoping
  • Longhole open stoping


Summary:

Due to the wide widths and relatively low grade of the mineral economy dictates that low-cost underground mining methods must be employed. The mining method chosen for recovery of the mineral is long-hole open-stope mining, with sub-levels developed at 15-m vertical intervals. The longhole stopes are designed for:
1) Minimum widths of 3 metres, maximum widths at times exceeding 30 m,
2) Minimum lengths of 20 m and at times, exceeding 100 m.
3) Vertical dimensions varying from 20 m to 75 m.

The 15-m interval for the sub-levels will allow for confirmatory percussion-drill testing for stope boundaries, and where possible, for aintaining blast-hole lengths at 20 m or less.


Crushing and Grinding


Processing

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Summary:

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Projected Production:

CommodityProductUnitsLOM
Gold Metal in conc./ doré oz 75,122
Copper Metal in conc./ doré M lbs  ......  Subscription required
Copper Concentrate kt  ......  Subscription required
Silver Metal in conc./ doré oz  ......  Subscription required

Operational Metrics:

Metrics
Daily mining capacity 400 t *
Daily milling capacity 400 t of ore *
Annual mining capacity 146 kt *
Ore tonnes mined, LOM 617,500 Mt *
Tonnes milled, LOM 617,500 Mt of ore *
Annual milling capacity 146 kt of ore *
* According to 2015 study.

Reserves at November 30, 2015:

CategoryTonnage CommodityGradeContained Metal
Measured 198,000 t Gold 5.36 g/t 34,000 oz
Measured 198,000 t Copper 0.83 % 3,623,000 lbs
Measured 198,000 t Silver 8.3 g/t 53,000 oz
Indicated 627,000 t Gold 4.97 g/t 100,000 oz
Indicated 627,000 t Copper 0.86 % 11,888,000 lbs
Indicated 627,000 t Silver 9.5 g/t 192,000 oz
Measured & Indicated 825,000 t Gold 5.07 g/t 134,000 oz
Measured & Indicated 825,000 t Copper 0.85 % 15,460,000 lbs
Measured & Indicated 825,000 t Silver 9.2 g/t 244,000 oz
Inferred 151,000 t Gold 4.21 g/t 20,000 oz
Inferred 151,000 t Copper 0.71 % 2,364,000 lbs
Inferred 151,000 t Silver 9.8 g/t 48,000 oz

Commodity Production Costs:

CommodityUnits
Assumed price Copper USD 2.75 / lb *  USD
Assumed price Silver USD 16.5 / oz *  USD
Assumed price Gold USD 1,200 / oz *  USD
* According to 2015 study / presentation.
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Operating Costs:

Units2015
UG mining costs ($/t mined) CAD 24.4 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2015 study.
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2015 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Total CapEx $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
EBITDA (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
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Heavy Mobile Equipment:

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Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2015
Feasibility Study Report 2009
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