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Mexico
Quebradillas Mine (La Parrilla Complex)

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 Location:
2.5 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
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StatusTemporary Suspension
Mine TypeUnderground
Commodities
  • Silver
  • Lead
  • Zinc
  • Gold
Mining Method
  • Mechanized Cut & Fill
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. (FM Plata) 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
  • Hydrothermal
  • Intrusion related


Summary:

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 intrusion related 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 other hand, occur as oblique or perpendicular splays to veins and faults, and as larger replacement deposits concordant with sedimentary bedding. R ........


Mining Methods

  • Mechanized Cut & Fill


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.

Production in 2016 was from five underground sources and from the Quebradillas open pit. Oxide ores where supplied mainly by the Quebradillas open pit, and Quebradillas and San Marcos underground mines, while sulphide ores were supplied from Rosarios, Intermedia, Vacas and Quebradillas underground mines. 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 stor ........


Crushing and Grinding
Flow Sheet: Source


Processing

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Summary:

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Combined production numbers are reported under La Parrilla Complex


Reserves at December 31, 2021:

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Sulphide 15 kt Silver 193 g/t 90 koz
Measured Sulphide 15 kt Lead 1.27 % 0.4 M lbs
Measured Sulphide 15 kt Zinc 1.27 % 0.4 M lbs
Measured Sulphide 15 kt Silver Equivalent 250 g/t 120 koz
Indicated Sulphide 321 kt Silver 177 g/t 1,820 koz
Indicated Sulphide 321 kt Lead 2.59 % 18.3 M lbs
Indicated Sulphide 321 kt Zinc 2.7 % 19 M lbs
Indicated Sulphide 321 kt Gold 0.08 g/t 0.8 koz
Indicated Sulphide 321 kt Silver Equivalent 303 g/t 3,120 koz
Inferred Sulphide 578 kt Silver 214 g/t 3,970 koz
Inferred Oxide 43 kt Silver 196 g/t 270 koz
Inferred Sulphide 578 kt Lead 0.25 % 1 M lbs
Inferred Sulphide 578 kt Zinc 0.22 % 0.9 M lbs
Inferred Sulphide 578 kt Gold 0.08 g/t 1.6 koz
Inferred Oxide 43 kt Gold 0.14 g/t 0.2 koz
Inferred Sulphide 578 kt Silver Equivalent 319 g/t 5,920 koz
Inferred Oxide 43 kt Silver Equivalent 208 g/t 290 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 16, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 16, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Information Form 2018
Technical Report 2016
Form 40-F 2015
Technical Report 2011
Subscription required - Subscription is required.

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