Overview
Status | Temporary Suspension |
Mine Type | Underground |
Commodities |
|
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. |
Source:
p. 93, 210
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
- Subscription is required.
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 ........

Source:

- subscription is required.
Flow Sheet:
Summary:

- subscription is required.
Production:
Commodity | Product | Units | 2019 | 2018 | 2017 | 2016 | 2015 |
Silver
|
Payable metal
|
oz
| ......  | 1,270,327 | 1,645,831 | 2,063,392 | 2,231,443 |
Silver
|
Metal in conc./ doré
|
oz
| ......  | 1,340,385 | 1,730,383 | 2,220,874 | 2,434,095 |
Lead
|
Metal in concentrate
|
lbs
| ......  | ......  | ......  | ......  | ......  |
Zinc
|
Metal in concentrate
|
lbs
| ......  | ......  | ......  | ......  | ......  |
Gold
|
Metal in doré
|
oz
| | ......  | ......  | ......  | ......  |
Silver Equivalent
|
Metal in conc./ doré
|
oz
| | ......  | ......  | ......  | ......  |
- Subscription is required.
Operational Metrics:
Metrics | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 |
Ore tonnes mined
| 167,535 t | | | | | |
Tonnes milled
| 167,535 t | 491,637 t | 543,985 t | 610,509 t | 667,702 t | 711,915 t |
Daily processing capacity
| 2,000 t | 2,000 t | 2,000 t | 2,000 t | 2,000 t | |
Daily milling rate
| | | 1,500 t | | | |
Reserves at December 31, 2021:
Category | OreType | Tonnage | Commodity | Grade | Contained 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
|
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.