Overview
| Status | Inactive / Suspended |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Sub-level stoping
- Longhole open stoping
|
| Mine Life | 4 years (as of Jan 1, 2015) |
Source:
p. 11
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.
Source:
Summary:
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Projected Production:
| Commodity | Product | Units | LOM |
|
Gold
|
Metal in conc./ doré
|
oz
| 75,122 |
|
Copper
|
Metal in conc./ doré
|
M lbs
| ...... |
|
Copper
|
Concentrate
|
kt
| ...... |
|
Silver
|
Metal in conc./ doré
|
oz
| ...... |
Operational Metrics:
| Metrics | |
|
Daily mining capacity
| 400 t * |
|
Daily milling capacity
| 400 t of ore * |
|
Annual mining capacity
| 146 kt * |
|
Annual milling capacity
| 146 kt of ore * |
|
Ore tonnes mined, LOM
| 617,500 Mt * |
|
Tonnes milled, LOM
| 617,500 Mt of ore * |
* According to 2015 study.
Reserves at November 30, 2015:
| Category | Tonnage | Commodity | Grade | Contained 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
|
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