Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Sub-level stoping
- Longitudinal retreat
- Room-and-pillar
|
| Production Start | ...  |
| Mine Life | 2042 |
In early April 2020, Avino suspended mining-related activities at the Project site due to the COVID-19 pandemic. In early June 2020, the company was provided authorization by the Mexican Secretariat of Health to commence regular operational activities in an orderly, gradual, and cautious manner.
Mine operation activities were later interrupted up to the end of Q3 2020 until Avino reached an agreement with the union (Avino 2020e). After a period of operational suspension, the Avino Mine restarted production during Q3 2021. |
Source:
p. 21,42
Avino holds a 99.67% interest in the Property through its subsidiary companies called Compañía Minera Mexicana de Avino, S.A. de C.V. (CMMA) and Promotora Avino, S.A. de C.V. (Promotora).
Summary of Property Ownership:
- CMMA (subsidiary) - 98.45 %
- Promotora Avino, S.A. de C.V. (subsidiary) - 1.22 %
- Estate of Ysita (non-controlling interest) - 0.33 %
Contractors
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Deposit Type
- Epithermal
- Breccia pipe / Stockwork
- Vein / narrow vein
Summary:
The Avino concession is located within a 12 km (north-south) by 8.5 km (east-west) caldera. The area contains numerous low-sulphidation epithermal veins, breccias, stockwork, and silicified zones that grade into a “near porphyry” environment, particularly in the Avino Mine area. The caldera has been uplifted by regional north-trending block faulting (a graben structure), exposing a window of andesitic pyroclastic rocks of the lower volcanic sequence within the caldera. The Lower Volcanic Sequence is overlain by the Upper Volcanic Sequence, consisting of rhyolite to trachyte flows and extensive ignimbrites and intruded by monzonite bodies.
AVINO VEIN
Geology and mineralization of the Avino Vein are summarized from Slim (2005d).
The Avino Vein is 1.6 km long and 60 m wide on the surface. The Avino Vein is the most striking and important example of the epithermal mineralization of the district whose structures are normally weathered and leached in their upper section as a result of contact with atmospheric waters producing a band of oxide minerals and zones of supergene enrichment to a depth of about 70 m.
In the oxide portion of the Avino Vein, the common minerals encountered include hematite, limonite, anglesite, and copper carbonate in white or green, somewhat chloritized, quartz zones. The common primary and secondary minerals encountered are argentite, bromargyrite, chalcopyrite, chalcocite, galena sphalerite, bornite, native silver, free gold, and native copper. Other ........
Mining Methods
- Sub-level stoping
- Longitudinal retreat
- Room-and-pillar
Summary:
Avino is currently mining on the Avino Vein using sublevel stoping and room and pillar mining methods. Levels are spaced 20 m apart and accessed via crosscuts from the main ramp (Tetra Tech 2018). Access into the Avino Vein is through the ET Mine.
The room and pillar mining method is used on each sublevel to mine out each level to the extent of the mineralization. Long holes are then drilled between the sublevels to facilitate the blasting of the mineralization between the sublevels (Tetra Tech 2018). In 2020, Avino reported it would transition from development-style mining to full-scale production mining to feed all four circuits using the long-hole retreat mining method, which is anticipated to incur lower mining costs.
Source:
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Flow Sheet:
Summary:
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Production:
In early April of 2020, Avino suspended mining-related activities at the Project site due to the COVID-19 pandemic. After a period of operational suspension, the Avino Mine restarted production during Q3 2021.
August 3, 2021 - Mining operations have restarted at the Avino Mine.
| Commodity | Product | Units | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Silver Equivalent
|
Metal in copper conc.
|
koz
| ...... ^ | ...... | ...... | ...... | ...... | 1,847 | 1,911 |
|
Silver
|
Metal in copper conc.
|
oz
| | ...... | ...... | ...... | ...... | ...... | ...... |
|
Copper
|
Metal in copper conc.
|
M lbs
| | ...... | ...... | ...... | ...... | ...... | ...... |
|
Gold
|
Metal in copper conc.
|
oz
| | ...... | ...... | ...... | ...... | ...... | ...... |
|
Copper
|
Concentrate
|
kt
| | | | ...... | ...... | ...... | ...... |
^ Guidance / Forecast.
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Operational Metrics:
| Metrics | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Daily milling capacity
| ...... | ...... | 2,650 t | 2,650 t | 2,650 t | |
|
Tonnes milled
| ...... | ...... | 204,286 t | 427,147 t | 426,794 t | 460,890 t |
|
Ore tonnes mined
| ...... | ...... | 190,061 t | 456,100 t | 428,075 t | 462,279 t |
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Reserves at November 30, 2022:
There are currently no Mineral Reserves reported on the Property.
Mineral Resources are reported at cut-off grades 60 g/t AgEQ. The silver equivalent was back-calculated using the following formula: AgEQ = Ag (g/t) + 71.43 * Au (g/t) + 113.04 * Cu (%).
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured & Indicated
|
27.8 Mt
|
Silver
|
60 g/t
|
53.17 M oz
|
|
Measured & Indicated
|
27.8 Mt
|
Copper
|
0.46 %
|
283 M lbs
|
|
Measured & Indicated
|
27.8 Mt
|
Gold
|
0.53 g/t
|
476 koz
|
|
Measured & Indicated
|
27.8 Mt
|
Silver Equivalent
|
150 g/t
|
133.8 M oz
|
|
Inferred
|
17.591 Mt
|
Silver
|
37 g/t
|
20.72 M oz
|
|
Inferred
|
17.591 Mt
|
Copper
|
0.4 %
|
154.18 M lbs
|
|
Inferred
|
17.591 Mt
|
Gold
|
0.34 g/t
|
191 koz
|
|
Inferred
|
17.591 Mt
|
Silver Equivalent
|
106 g/t
|
59.76 M oz
|
Source:
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Corporate Filings & Presentations:
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