Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Cut & Fill
- Longhole stoping
- Cemented backfill
- Backfill
|
Production Start | ...  |
Mine Life | 12 years (as of Jan 1, 2022) |
With the delay in connecting the Juanicipio plant to the national power grid, Fresnillo, as operator, reports that commissioning of the Juanicipio processing plant is expected to ramp up to the nameplate capacity in mid-to-late 2023 with a moderated impact on planned 2023 production due to the later than expected commissioning at Juanicipio (from mid-2022 to early 2023). Until the rampup of the Juanicipio processing plant is completed, excess mineralized material from Juanicipio may continue to be processed at the Fresnillo and Saucito processing plants. |
Source:
p. 8
MAG Silver owns 44% of Minera Juanicipio, S.A. de C.V. , which owns the Juanicipio Project. Fresnillo is the project operator and holds the remaining 56%. On December 27, 2021, MAG Silver and Fresnillo incorporated Equipos Chaparral, S.A. de C.V., in the same ownership proportions as Minera Juanicipio for the purpose of holding the Juanicipio plant and mining equipment to be leased to Minera Juanicipio.
Contractors
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Deposit Type
- Vein / narrow vein
- Epithermal
Summary:
The Juanicipio deposit consists of two main vein systems, the Valdecañas vein system and the Juanicipio vein, which are significant silver-gold epithermal structures. The Valdecañas vein system consists of five veins (V1E, V1W, HW1, VANT, and V2W) and the Juanicipio vein (VJUA). Both systems strike east-southeast and dip 35° to 70° with an average dip of about 58° southwest. The Valdecañas vein system displays the metal zonation typical of the Fresnillo District and epithermal veins in general, of an upper precious metal zone (Bonanza Zone) grading downwards into a deeper base metal zone (Deep Zone). There is significant evidence for a repeat of this zonation in the deeper reaches, perhaps reflecting “stacked” boiling levels (Buchanan, 1981). The Valdecañas structure hosts the majority of the Mineral Resources currently estimated on the Juanicipio property.
The Juanicipio vein is located some 1,100 m to the south of the Valdecañas vein. Thirty-five drillholes contribute to the definition of this vein. Overall, Juanicipio is a much thinner vein and appears to have a higher gold content; however, this interpretation is based on a limited number of overall samples. Mineralization styles and host rocks are the same as those for Valdecañas.
The Valdecañas vein system has undergone multiple mineralizing events as suggested by various stages of brecciation and quartz sealing, local rhythmic microcrystalline quartz-pyrargyrite-acanthite banding, and open-space cocks-comb textures ........

Mining Methods
- Cut & Fill
- Longhole stoping
- Cemented backfill
- Backfill
Summary:
The primary mining is longhole stoping, wich production rate of 4,000 tpd. Some cost savings and production efficiencies have been identified with the use of waste rock fill, which is now considered as the primary backfill; in the wider stopes where more than one longitudinal pass is required, cemented rock fill will be utilized.
The proposed mining method employs zone access via three internal ramps on 20 m sub-levels, as well as footwall access to the extents of the mineralization to allow placement of rock fill. Stopes 20 m high (floor to floor) are mined from the extents back to the central access (on retreat) with rock fill placed within 20 m of the blasting face.
In the lower levels of the vein, the vein widens out to a maximum thickness of approximately 30 m. In these areas, the vein will be mined in two longitudinal passes with a maximum width of 15 m. The footwall stope will be taken first over the full strike length, followed by the hangingwall stope. Cemented rock fill will be used in the footwall stope to prevent waste entering the hanging wall stope.
Truck haulage, shaft hoisting, and conveying have been considered for transferring mineralized rock and waste from the mine workings to surface. All waste not placed directly in stopes will be trucked to surface via twin access declines, where it will be stockpiled and later used for backfilling stopes as they are mined out. In early mining, mineralized rock from development and stop ........

Source:

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Flow Sheet:
Summary:

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Reserves at May 31, 2022:
Mineral Reserves cut-off grade is 265 g/t AgEq.
Mineral Resources cut-off grade is 196 g/t AgEq.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
16,302 kt
|
Silver
|
284 g/t
|
148,796 koz
|
Proven & Probable
|
16,302 kt
|
Gold
|
1.53 g/t
|
800 koz
|
Proven & Probable
|
16,302 kt
|
Lead
|
2.38 %
|
388 kt
|
Proven & Probable
|
16,302 kt
|
Zinc
|
4.27 %
|
696 kt
|
Measured & Indicated
|
15,977 kt
|
Silver
|
343 g/t
|
176,373 koz
|
Measured & Indicated
|
15,977 kt
|
Gold
|
1.83 g/t
|
941 koz
|
Measured & Indicated
|
15,977 kt
|
Lead
|
2.78 %
|
445 kt
|
Measured & Indicated
|
15,977 kt
|
Zinc
|
5.03 %
|
804 kt
|
Inferred
|
14,836 kt
|
Silver
|
223 g/t
|
106,396 koz
|
Inferred
|
14,836 kt
|
Gold
|
1.17 g/t
|
559 koz
|
Inferred
|
14,836 kt
|
Lead
|
2.53 %
|
375 kt
|
Inferred
|
14,836 kt
|
Zinc
|
5.15 %
|
764 kt
|
Pipelines and Water Supply
Source:

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Corporate Filings & Presentations:
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