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Mexico
Avino Oxide Tailings Project (Avino)

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 Location:
65km NE from Durango, Durango, Mexico

  Project Contacts:
Alonso de Pacheco 300, Nueva Vizcaya
Durango
Durango, Mexico
34080
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeTailings
Commodities
  • Silver
  • Gold
  • Silver Equivalent
Mining Method
  • Truck & Shovel / Loader
Mine Life7 years (as of Jan 1, 2017)


Owners

Source: p. 42
CompanyInterestOwnership
Avino Silver & Gold Mines Ltd. 99.67 % Indirect
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

  • Tailings


Summary:

The oxide tailings deposit comprises historic recovery plant residue material that was wasted from processing plants during the earlier period of open pit mining of the Avino Vein. The oxide tailings are partially covered by younger unconsolidated sulphide tailings on the northwest side.

The Avino tailings dam is located approximately 500 m west southwest of the main shaft to the old underground workings and 2.5 km southwest of the San Gonzalo Vein.

Within the tailings dam, there are three distinct benches:
* lower oxide bench;
* middle oxide bench;
* upper bench or sulphide bench.

Due to the historical processing sequence, the oxide tailings are primarily derived from weathered and oxidized rocks close to the surface on the Property, whereas the sulphide tailings are predominantly derived from material sourced at depth from the underground workings, below the weathered/leached zone.

In the oxide zone, mineralization is primarily hosted by the minerals argentite, bromargyrite, chalcopyrite, chalcocite, galena, sphalerite, bornite, native silver, gold, and native copper. Other minerals present in mineralized areas, but not hosting the metals of interest, include hematite, chlorite, quartz, barite, pyrite, arsenopyrite and pyrrhotite. Malachite, anglesite and limonite are common in the quartz zones of the weathered parts of the oxide material.

On the Property, the oxide tailings have been predominantly sourc ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The oxide tailings Mineral Resource will be mined/moved using a conventional truck/loader surface mining method. The production cycle consists of loading and trucking.

The production schedule has been developed for the oxide tailings based on a treatment rate of 500 kt/a. This would be equivalent to a throughput rate of 1,370 t/d. This will give an overall Project duration of approximately eight years. This eight-year period includes one year of pre-production and excludes the time required for remediation of the heap after the leaching process has been completed. Only oxide tailings will be considered for treatment, while sulphide materials will be considered waste.

The mining operations include loading and trucking. A 3.85 m3 rated (5.0 yd3) front-end loader will be used to load a 24 t articulated truck that will either deliver the sulphide tailings to the sulphide stockpile or the oxide tailings to the 160 t oxide tailings hopper. Once the hopper is filled, excess tailings will be stockpiled around the hopper to be loaded by the process plant group.

Certain areas of the tailings might contain high amounts of moisture that can lead to equipment getting stuck. To mitigate this challenge, wider, oversized tires with chains will be installed on the front-end loader. Also, the front-end loader bucket will be downsized to 3.06 m3 (4.0 yd3). This will lighten the load on the front tires preventing them from sinking into saturated material. The t ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Silver koz 8826,173
Gold koz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Daily milling capacity 1,370 t *
Waste tonnes, LOM 2,939 kt *
Ore tonnes mined, LOM 3,122 kt *
Total tonnes mined, LOM 6,061 kt *
Tonnes milled, LOM 3,122 kt *
Annual milling capacity 500 kt *
* According to 2017 study.

Reserves at October 30, 2020:
Cut-off grade is 50 g/t AgEQ for the reported Mineral Resources.

CategoryTonnage CommodityGradeContained Metal
Indicated 1.12 Mt Silver 89 g/t 15 koz
Indicated 1.12 Mt Gold 0.42 g/t 3.2 M oz
Indicated 1.12 Mt Silver Equivalent 124 g/t 4.5 M oz
Inferred 1.23 Mt Silver 85 g/t 3.4 M oz
Inferred 1.23 Mt Gold 0.47 g/t 19 koz
Inferred 1.23 Mt Silver Equivalent 125 g/t 5 M oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Silver USD 2.21 / oz *†  
All-in sustaining costs (AISC) Silver USD 7.07 / oz *†  
Assumed price Silver USD 18.5 / oz *  
Assumed price Gold USD 1,250 / oz *  
* According to 2017 study / presentation.
† Net of By-Product.

Operating Costs:

Units2017
OP mining costs ($/t mined) USD 0.58 *
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2017 study.
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2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of January 13, 2021:
HME TypeSizeQuantity
Loader (FEL) 3.06 cu. m ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2018
Press Release 2018
Technical Report 2017
Form 20-F 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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