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Mexico
Avino Mine

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 Location:
65 km NE from Durango, Durango, Mexico

  Regional Office:
Alonso de Pacheco 300, Nueva Vizcaya
Durango
Durango, Mexico
34080
Phone  ...  Subscription required
Fax+52-618-817-2509
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
  • Copper
Mining Method
  • Sub-level caving
  • Longhole stoping
Processing
  • Flotation
Mine Life8.5 years (as of Jan 1, 2019)
Latest NewsAvino Reports 60% Increase in Measured and Indicated Mineral Resources to 75.9 Million Ounces Silver Equivalent at the Avino Property     January 13, 2021


Owners

Source: p. 25, 120
CompanyInterestOwnership
Avino Silver & Gold Mines Ltd. 99.67 % Indirect
Summary of Property Ownership
Avino Mexico - 98.45%
Promotora Avino, S.A. de C.V. - 1.22%
Estate of Ysita - 0.33%.

The Company’s Mexican subsidiaries are the wholly owned subsidiary Oniva Silver and Gold Mines S.A. de C.V., referred to as “Oniva”, Promotora, in which the Company has direct ownership of 79.09%, and Avino Mexico in which the Company has a 98.45% direct ownership and an additional 1.22% indirect ownership held through Promotora. The Company’s total effective ownership interest in Avino Mexico is 99.67%. All of these subsidiaries are incorporated under the laws of Mexico.

Deposit Type

  • Epithermal
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

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 minerals present in mineralized areas include quartz, pyrite, chlorite, barite, arsenopyrite, pyrrhotite and specularite.

Higher silver values are reported to decrease overall with depth, except at vein intersections and vein inflections, where higher values persist to depth. The same can be said for gold, although the higher values start just below the onset of silver mineralization, at or near the surface. In contrast, higher copper values coincide with vein intersections and may increase with depth. Sporadic, localized copper enrichment occurs toward the footwall contact and may represent a different phase of fluid emplacement. Despite the overall decrease in precious metal grade with depth, local increases in metal grades are apparent in the mine sampling and exploration drilling, possible reflecting changes in boiling level with pressure variations in the epithermal system.

The Avino Vein has been followed longitudinally for more than 1,300 m and vertically for more than 600 m. It strikes north 66° east with an east-west splay, and dips to the south and southeast at 60° to 70°. Steeply dipping, high grade zones within the vein and stock-work zones are frequently found in the upper part of the vein, as well as at its intersections with a number of lateral veins. An example of a higher- grade area of mineralization encountered with major lateral vein intersecting the Avino was the El Hundido, which exceeded 40 m in thickness. In the lower areas of the vein and mine, mineralized cross-veins, branch-veins, and stockwork zones have been found in the footwall at San Luis and at El Hundido, and are assumed to persist with depth.

The hanging wall of the Avino Vein is andesite, while the footwall is a monzonite intrusive with andesite sections. A post-mineralization fault parallel with the vein occurs in the hanging wall at a distance of several metres in the area of San Luis, while in the central part of El Hundido, this fault is located at the contact with the vein over a distance of about 300 m, up to the area of Santa Elena and San Antonio. From that point, and proceeding toward the El Chirumbo Mine, this fault cuts the vein between the face at San Carlos and the exposure at the underground ramp. The fault then enters the footwall where it remains until a point about 30 m east of the west face of the Chirumbo area, producing a downward displacement of the vein of between 50 to 100 m.

At Chirumbo, the fault largely replaces the vein due to strong leaching by post-mineralization circulating of water in the gouge. On the east face at Chirumbo, the fault again enters the hanging wall; in this zone the vein is composed of branches and stockwork and to the east of this point the fault crosses the vein numerous times.

The deposit is epithermal and made up of veins and dependent stockwork structures, mainly in the hanging wall and often associated with vein intersections. Four vein systems have been described which, in decreasing order of importance, are:

• system striking east-west, dipping south at 60° to 70°, including the Avino Vein and its possible extension in the Cerro de San Jose

• system striking north 60° to 70° west, dipping 60° to 80° southwest, comprising the following important veins: El Trompo, San Juventino, San Jorge, Platosa, Los Reyes, Potosina, El Fuerte, and Conejo

• system striking north 20° to 30° west, dipping between 60° to 80° to either the southwest or northeast, comprising the following significant veins: San Gonzalo, Aguila Mexicana, and La Calcita, as well as the Stockwork La Potosina, and the Stockwork El Fuerte

• systems striking north 60° to 80° east, dipping 60° to 80° southeast, comprising the following veins: Santiago, Retana, Nuestra Senora, and San Pedro and San Pablo.


Mining Methods

  • Sub-level caving
  • Longhole stoping


Summary:

Longhole stoping and sublevel caving mining methods are being used.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

The Avino Mill serves the Avino and San Gonzalo mines.

The process plant consists of crushing and grinding facilities, followed by a flotation process circuit to recover and upgrade silver and gold from the feed material. Common reagents were used within the flotation circuit. The flotation concentrate is thickened, filtered and sent to a concentrate stockpile for subsequent shipping to customers.

Recoveries & Grades:

CommodityParameter201920182017201620152014
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t 445364676577
Silver Concentrate Grade, g/t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.450.490.520.420.290.38
Gold Concentrate Grade, g/t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Head Grade, % 0.560.550.480.50.620.6
Copper Concentrate Grade, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityProductUnits201920182017201620152014
Silver Metal in copper concentrate oz  ......  Subscription required  ......  Subscription required803,438789,372717,90154,794
Gold Metal in copper concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate dmt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in copper concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Metal in copper concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required450,281 t372,376 t19,273 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required429,289 dmt396,113 dmt25,990 dmt
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,400 dmt
Subscription required - Subscription is required.

Reserves at February 21, 2018:

CategoryTonnage CommodityGradeContained Metal
Measured 4,540,000 t Silver 71 g/t 10.3 M oz
Measured 4,540,000 t Gold 0.56 g/t 82 koz
Measured 4,540,000 t Copper 0.53 % 24,000 t
Measured 4,540,000 t Silver Equivalent 141 g/t 20.6 M oz
Indicated 4,260,000 t Silver 51 g/t 7 M oz
Indicated 4,260,000 t Gold 0.66 g/t 90.5 koz
Indicated 4,260,000 t Copper 0.35 % 15,000 t
Indicated 4,260,000 t Silver Equivalent 113 g/t 15.5 M oz
Inferred 4,160,000 t Silver 57 g/t 7.6 M oz
Inferred 4,160,000 t Gold 0.6 g/t 80.3 koz
Inferred 4,160,000 t Copper 0.36 % 15,000 t
Inferred 4,160,000 t Silver Equivalent 117 g/t 15.6 M oz

Commodity Production Costs:

CommodityUnits201920182017201620152014
Cash costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 8.87 / oz 9.3 / oz 7.64 / oz 10.7 / oz
All-in sustaining costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 10.3 / oz 11 / oz 11.1 / oz 13.7 / oz
Subscription required - Subscription is required.

Financials:

Units2019
Sustaining costs M USD  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Management Discussion & Analysis 2017
Annual Report 2016
Technical Report 2016
Form 20-F 2015
Management Discussion & Analysis 2015
Form 20-F 2014
Technical Report 2013
Subscription required - Subscription is required.

News:

NewsDate
Avino Reports 60% Increase in Measured and Indicated Mineral Resources to 75.9 Million Ounces Silver Equivalent at the Avino Property January 13, 2021
­Avino Reports Q3 2020 Financial Results November 9, 2020
Avino Provides Mine Update July 10, 2020
Avino Announces Phased Ramp-Up to Resume Mining Operations June 1, 2020
Avino Complies with the Mexican Government COVID-19 Order April 2, 2020
Avino Announces Closing of Bought Deal Offering July 30, 2019
Avino Announces an Updated Mineral Resource Estimate at the Avino Property February 21, 2018

Aerial view:

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