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Mexico
Cosala Operation (EC120 (El Cajon & Zone 120) Project, Nuestra Señora Mine, San Rafael Mine)

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 Location:
6 km E from Cosala, Sinaloa, Mexico

  Address:
Belisario Domínguez No. 29 a Cosalá cruzar las comunidades de la Estancia y los Braceros.
Cosalá
Sinaloa, Mexico
80700
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Fax01(696)-965-0956
EmailEmail
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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
  • Zinc
  • Lead
  • Copper
Mining Method
  • Post Pillar Cut & Fill
  • Dry waste backfill
Production Start...
Mine Life5 years (as of Jan 1, 2022)
The Cosalá Operations consists of the San Rafael mine, the Los Braceros processing plant and tailings storage facility, the EC120 Project, and the past producing Nuestra Señora mine.

Cosalá Operations were previously subject to an illegal blockade which began in January 2020 and continued until the Americas Gold and Silver Corporation signed an agreement with the Mexican Ministries of Economy, Interior. The Cosala Operations returned to full production following its restart and ramp-up in Q4-2021.


Owners

Source: p. 33
CompanyInterestOwnership
Americas Gold and Silver Corp. (operator) 100 % Indirect
The Cosalá Operations is 100% owned and operated by Americas’ wholly owned subsidiaries, Platte River Gold Inc., Minera Platter River Gold S.A. de R.L. de C.V. and Minera Cosalá S.A. de C.V.

Contractors

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Deposit Type

  • Carbonate replacement
  • Skarn
  • Breccia pipe / Stockwork
  • VMS


Summary:

Mineralization within the Cosalá mining district is related to granodioritic or granitic intrusions of the Sinaloa Batholith, a composite gabbroic to granodioritic complex that induced strong contact metamorphism in adjacent sedimentary and volcano-sedimentary units. Exposures of the sedimentary rocks and associated mineralization are small and surrounded by Tertiary volcanic rocks (Armbrust and Chlumsky, 2006).

Three types of intrusions are present in the San Rafael-El Cajón area. Medium- to coarse-grained granodiorite, which is part of the district-wide batholith, crops out in the western part of the project area and was also intersected at the bottom of a number of PRG drill holes in the El Cajón area. There are also large, local intrusions of diorite, often occurring as sills, that are interpreted to be related to the emplacement of the batholith. Andesitic dikes and sills, which are sometimes weakly magnetic, are also present.

The property-wide dioritic intrusions are often weakly magnetic and generally only weakly altered, although the dioritic intrusion(s) spatially associated with the El Cajón mineralization exhibit a pervasive skarn alteration assemblage consisting of albite, tourmaline, scapolite, epidote, calcite, titanite (sphene) and minor quartz. Similarly, the diorite at Zone 120 occurs as conformable sills or gently cross cutting dikes. These are generally lightly altered but are spatially related to mineralization. Though pervasively al ........


Mining Methods

  • Post Pillar Cut & Fill
  • Dry waste backfill


Summary:

The Cosalá Operations consists of the San Rafael mine, the Los Braceros processing plant and tailings storage facility, the EC120 Project, and the past producing Nuestra Señora mine.

Construction started at San Rafael in September 2016 and achieved commercial production in December 2017. The Mineral Reserves support a mine life of five years. The underground mine is accessed by a decline that portals at surface near the southern portion of the deposit where the surface infrastructure is located. A series of ramp systems from the main decline provides access to the various stoping areas of the mine.

The main decline has reached the bottom of the defined Mineral Reserves in the Main Zone and ramp development to access the Upper Zone has commenced. Due to the depth, shallow-dipping angle and variable thickness of the mineralization, the mining method used at San Rafael is post-pillar cut and fill. Stopes are accessed from a primary stope access driven at a -15% decline. After mining of each successive 5m high cut of ore, the stope is backfilled and the access “backslashed” to allow for mining of the next cut. This sequence is repeated up to five times until the stope access reaches an incline of +15%. Access to the next cut is then provided by a -15% stope access driven from a higher elevation.

The LOM plan anticipates that the cut and fill stopes will be backfilled with unconsolidated development waste and waste generated from a waste quarry. G ........


Crushing and Grinding
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Processing

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Summary:

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Production:
Cosalá Operations was put on care and maintenance in February 2020. The Company commenced reopening the operation in September 2021.

CommodityUnits2023202220212020201920182017
Silver koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required448921
Zinc M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent oz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper lbs  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required613,814 t544,472 t526,726 t
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required1,750 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,800 t1,600 t
Subscription required - Subscription is required.

Reserves at June 30, 2022:
Mineral Reserves are estimated at a net smelter return ("NSR") cut-off value of US$60/tonne at San Rafael, $45/tonne at El Cajón, $45/tonne at Zone 120.

Mineral Resources are estimated at a NSR cut-off value of US$34/tonne at San Rafael, US$45/tonne at Zone 120, US$45/tonne at El Cajón. Mineral Resources at Nuestra Señora are estimated at a 90g/tonne silver equivalent cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 4,505 kt Silver 153 g/t 22,201 koz
Proven & Probable 1,665 kt Zinc 2.92 % 107 M lbs
Proven & Probable 1,665 kt Lead 1.06 % 38.9 M lbs
Proven & Probable 2,840 kt Copper 0.43 % 27.2 M lbs
Measured & Indicated 7,690 kt Silver 88 g/t 21,785 koz
Measured & Indicated 5,921 kt Zinc 1.95 % 254.9 M lbs
Measured & Indicated 5,921 kt Lead 0.88 % 115.5 M lbs
Measured & Indicated 3,905 kt Copper 0.25 % 21.1 M lbs
Inferred 2,934 koz Silver 108 g/t 10,192 koz
Inferred 2,442 koz Zinc 1.63 % 87.6 M lbs
Inferred 2,442 koz Lead 1.07 % 57.5 M lbs
Inferred 2,501 koz Copper 0.25 % 14 M lbs

Commodity Production Costs:

CommodityUnits202220212020201920182017
Total cash costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† -37.95 / oz†   -0.13 / oz†  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† -19.66 / oz†   0.57 / oz†  
† Net of By-Product.
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Financials:

Units2022202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 8.2   0.4   0.8  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 41.5   21.5   23.3  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 3.4   5.1   1.3  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.8   4.9   1.1  
Subscription required - Subscription is required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Information Form 2022
Financial Review 2022
Management Discussion & Analysis 2022
Other 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Annual Information Form 2017
Annual Report 2017
Financial Review 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Annual Report 2015
Preliminary Economic Assessment 2012
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