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Mexico
La Parrilla Complex (La Rosa-Rosarios-La Blanca Mine, Quebradillas Mine, San Marcos Mine, Vacas Mine)

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 Location:
1 km SE from San José de la Parrilla, Durango, Mexico

  Regional Office:
Fanny Anitúa No 2700
Durango
Durango, Mexico
34076
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Fax01-(618)-827-9070
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  • Overview
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  • Mining
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Overview

StatusTemporary Suspension
Mine TypeUnderground
Commodities
  • Silver
  • Lead
  • Zinc
  • Gold
Mining Method
  • Mechanized Cut & Fill
  • Longhole open stoping
Production Start...
The La Parrilla Silver Mine is a complex of underground operations consisting of the Rosarios, La Blanca and San Marcos mines which are interconnected through underground workings, and the Vacas and Quebradillas mines which are connected via above-ground gravel roads.

The La Parrilla operation was placed on temporary suspension on September 2, 2019. Exploration for new deposits continues with an emphasis on brownfield and greenfield targets within the property mineral concessions.


Owners

Source: p. 93, 210
CompanyInterestOwnership
First Majestic Silver Corp. 100 % Indirect
First Majestic Plata, S.A. de C.V. (operator) 100 % Direct
La Parrilla mine is owned and operated by First Majestic Plata, S.A. de C.V. (FMPlata) a wholly-owned subsidiary of FMS through its Mexican holding company, Corporación First Majestic, S.A. de C.V. (CFM).

Contractors

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Deposit Type

  • Vein / narrow vein
  • Carbonate replacement
  • Intrusion related
  • Mesothermal
  • Breccia pipe / Stockwork


Summary:

Two mineral deposit models are proposed for La Parrilla: intrusion-related carbonate replacement deposits and mesothermal fault veins.

The mineralization at La Parrilla occurs in veins, breccias, stockworks and replacements that are hosted by the Cretaceous limestones and shales of the Indidura Formation and by the granodiorite–quartz monzonite intrusion. Contact metamorphism and metasomatism resulted in the development of marble, hornfels, skarnoid, and skarn at the intrusive contact. Because the mineralization is related to the intrusive contact and skarn development, the deposits are proposed to be of the intrusionrelated hydrothermal type, and may represent mesothermal to epithermal environments.

Veins at La Parrilla are of two types: open space filling veins and fault-veins. The open space filling veins can consist of massive sulphides veins; quartz-calcite veins containing pyrite, sphalerite, and galena; and breccia veins cemented by quartz-calcite. Fault-veins consists of matrix-supported breccias or gouge containing disseminated sulphides and oxides. Open space filling veins can transition along strike into fault-veins and vice versa, and the presence of stockwork is common at the contacts of the vein with the host rock. Thus, it is interpreted that most veins were open or partially open faults and fractures, that they were flooded with hydrothermal fluids, and that some of these were reactivated by later faulting. Replacement deposits, on the o ........


Mining Methods

  • Mechanized Cut & Fill
  • Longhole open stoping


Summary:

The La Parrilla Silver Mine is a complex of producing underground operations consisting of the Rosarios, La Blanca and San Marcos mines which are interconnected through underground workings, and the Vacas and Quebradillas mines which are connected via above-ground gravel roads.

Both the Quebradillas open pit and Vacas were mined out in 2016.

The underground mining operations currently use the Mechanized Cut and Fill (MCF) mining method. This is the mechanized version of a classic method for mining narrow orebodies and involves extracting the ore in small slices, 2 to 4 m high, working from the bottom of the mining block upwards. As each cut is extracted, the void is filled with waste rock from development to stabilize the walls and create a working platform for the next lift.

MCF mining for a new mining block begins by driving a 4 x 4m ramp on the footwall side of the ore body and establishing sub-levels at regular vertical intervals. A typical mining block at La Parrilla will have the main haulage levels every 50 m with three sub-levels at 12 m intervals. The main haulage levels will include any ventilation infrastructure, a remuck for storing broken ore, a truck loading area, electrical substations and sumps.

To access the ore body, an initial access drift or attack ramp is driven from the lower main level to near the middle of the bottom elevation of the MCF stope. Typical development methods are then used to drive sill drifts ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits20192018201720162015
Silver Payable metal oz  ......  Subscription required1,270,3271,645,8312,063,3922,231,443
Silver Metal in conc./ doré oz  ......  Subscription required1,340,3851,730,3832,220,8742,434,095
Lead Metal in concentrate lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Metal in conc./ doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Operational Metrics:

Metrics201920182017201620152014
Ore tonnes mined 167,535 t
Tonnes milled 167,535 t491,637 t543,985 t610,509 t667,702 t711,915 t
Daily processing capacity 2,000 t2,000 t2,000 t2,000 t2,000 t
Daily milling rate 1,500 t

Reserves at December 31, 2021:

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured & Indicated Total 1,119 kt Silver 198 g/t 7,120 koz
Measured & Indicated Total 1,119 kt Lead 1.65 % 40.7 M lbs
Measured & Indicated Total 1,119 kt Zinc 1.5 % 37 M lbs
Measured & Indicated Total 1,119 kt Gold 0.07 g/t 3 koz
Measured & Indicated Total 1,119 kt Silver Equivalent 277 g/t 9,960 koz
Inferred Total 1,421 kt Silver 211 g/t 9,620 koz
Inferred Total 1,421 kt Lead 1.13 g/t 35.4 M lbs
Inferred Total 1,421 kt Zinc 1.38 % 43.3 M lbs
Inferred Total 1,421 kt Gold 0.09 g/t 4 koz
Inferred Total 1,421 kt Silver Equivalent 274 g/t 12,500 koz

Commodity Production Costs:

CommodityUnits2019201820172016
Credits (by-product) Silver USD -7.19 / oz   -8.84 / oz  
Cash costs Silver USD 15.4 / oz   11.5 / oz  
Total cash costs Silver USD  ......  Subscription required 23.1 / oz   18.3 / oz   16.4 / oz  
Total cash costs Silver USD  ......  Subscription required† 12.8 / oz†   11.1 / oz†   7.58 / oz†  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required† 19.6 / oz†   16.2 / oz†   10.5 / oz†  
† Net of By-Product.

Operating Costs:

Units20192018201720162015
Combined mining costs ($/t milled) USD 18.516.616.5
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2019201820172016
Sustaining costs M USD  ......  Subscription required 8   7.7  
Capital expenditures M USD  ......  Subscription required 14.2   15.3   11.1  
Revenue M USD  ......  Subscription required 29.9   36.3   44.9  
Operating Income M USD  ......  Subscription required 21.8   -9.8   0.4  



Heavy Mobile Equipment as of December 31, 2016:
HME TypeModelSizeQuantity
Concrete sprayer ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Truck (dump) 20 t ....................... Subscription required
Truck (underground) 15 t ....................... Subscription required
Truck (underground) 20 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Corporate Presentation 2018
Press Release 2018
Corporate Presentation 2017
Form 40-F 2017
Annual Report 2016
Financial Review 2016
Form 40-F 2016
Technical Report 2016
Form 40-F 2015
Technical Report 2011
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