• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Mexico
Juanicipio Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
6 km SW from Fresnillo, Zacatecas, Mexico

  Regional Office:
Calzada Legaria No. 549 Torre 2 Colonia 10 de abril Delegación Miguel Hidalgo
Mexico
Mexico
11250
Phone  ...  Subscription required
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Mexico
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
  • Lead
  • Zinc
Mining Method
  • Longhole stoping
  • Cemented backfill
Processing
  • Gravity separation
  • Flotation
Mine Life2038
The first production stope is expected to be ready for mining in Q3-2020. Ahead of schedule with anticipated processing of 16,000 tonnes per month of mineralized material through the Fresnillo plant until the Juanicipio plant is commissioned. Juanicipio plant expected to commence commissioning in mid-2021.
Latest NewsMAG Silver Announces First Production From Juanicipio     October 21, 2020


Owners & OPERATOR

Source: p. 2
CompanyInterestOwnership
Fresnillo plc. (operator) 56 % Indirect
Fresnillo plc is the operator of Juanicipio and holds a 56% majority stake in the Joint Venture, with partner MAG Silver Corp. owning the remaining 44%.

Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The two significant silver-gold epithermal structures discovered to date on the Juanicipio property are known as the Valdecañas and Juanicipio veins. Both veins strike east-southeast and dip 35° to 70° with an average of about 58° southwest. Both display the metal zonation typical of the Fresnillo District and epithermal veins in general, of an upper precious metal “Bonanza” zone grading downwards into a deeper base metal zone. The Valdecañas structure hosts the majority of the Mineral Resources currently estimated on the property.

The vein extends beyond the Juanicipio property boundaries in both the northwest and southeast directions. It varies in true thickness from less than one metre up to 25.8 m, averaging approximately five metres. Generally, the precious metals rich zone is 400 m to 450 m in vertical extent with an additional 50 m vertical extent of base metal dominant zone. The vein structure is made up of one main vein and three parallel to subparallel smaller veins. Descriptions of the geometry, location, and grades are presented in Section 14. The various vein panels making up the overall Valdecañas vein structure are now referred to as: V1E, V1W, V2W, and HW1.

Mineralization consists of precious metal rich, banded, or brecciated quartz-pyrargyriteacanthite-polybasite-galena-sphalerite veins. The Valdecañas veins have undergone multiple mineralizing events as suggested by various stages of brecciation and quartz sealing, local rhythmic microcrystalline quartz-pyrargyrite banding, and open-space cockscomb textures and vuggy silica. The veins exhibit the characteristic metal zoning of the principal veins in the Fresnillo district, observed as a change from silver and gold rich zones at the top to increased base metals in the deeper intersections. Notably, the gold rich mineralization cuts across the silver rich zones, which in turn cut earlier base-metal dominant stages indicating complex multi-stage mineralization as is seen separately in other parts of the district.

Within 10 m to 20 m of the vein, the wall rocks are progressively and pervasively silicified and cut by quartz veinlets carrying pyrite-sphalerite-galena sulphide minerals. Alteration in the volcaniclastic/sedimentary host rock farther away from the vein is characterized by weak pyritization, moderate clay alteration, and calcite veining.

The Juanicipio Vein was discovered in 2003 by MAG prior to the discovery of the Valdecañas system, which is located 1,100 m to the north. Discovery hole JI03-01 intersected two metres averaging 630 g/t Ag and 11.4 g/t Au at a vertical depth of approximately 515 m. Thirty-five drill holes contributed to the definition of this vein and the current Mineral Resource estimate includes the Juanicipio Vein. In general, the zone averages greater than 530 g/t Ag, 4.00 g/t Au with low Pb and Zn values. The Juanicipio Vein is referred to as JV1 most statistical and modelling examinations.


Mining Methods

  • Longhole stoping
  • Cemented backfill


Summary:

The 2012 PEA considered a longhole stoping mining method with pastefill. AMC undertook site visits to other operating mines in the area to review the details of the mining methods used and the application of rock fill. The primary mining method continues to be longhole stoping, however some cost savings and production efficiencies were identified with waste rock fill over pastefill. Waste rock is now considered as the primary backfill and in the wider stopes where more than one longitudinal pass is required, cemented rock fill will be utilized.

The mine access is via twin declines to the top of the mineralization. The access route then splits into three internal ramp systems on 20 m sub-level spacing, with central accesses to the vein as well as footwall drives 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 (retreat) with rock fill placed within 20 m of the retreating face.

In the lower levels of the mine, 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 minimize fill dilution into the hangingwall stope.


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation

Flow Sheet: Subscription required

Summary:

The processing plant will have a nominal capacity of 4,000 tpd and consists of comminution circuit, with underground primary crushing, secondary crushing and milling on surface, followed by sequential flotation to produce a silver-rich lead concentrate, followed by a zinc concentrate and a gold-containing pyrite concentrate.

Mineralized material transport
The underground crusher will process the run- of-mine (ROM) material by using a primary jaw crusher to reduce the material from a nominal 500 mm to a 100% passing size (P100) of 178 mm (P80 of 87 mm). The mineralized material will then be transported by means of a conveyor belt discharging directly onto the mill stockpile.

Mineralized material stockpile
The main objective of the mineralized material stock pile is to maintain continuity of the operation of the processing plant and to allow blending of different mineralized material grades, if required, and a consistent sizing of material. The stockpile a ........

CommodityParameter
Subscription required - Subscription is required.

Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Silver M oz 12183
Gold koz  ......  Subscription required  ......  Subscription required
Lead M lbs  ......  Subscription required  ......  Subscription required
Zinc M lbs  ......  Subscription required  ......  Subscription required
All production numbers are expressed as payable metal.


Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Probable 16,218 kt Silver 296 g/t 153,571 koz
Probable 16,218 kt Gold 1.5 g/t 782 koz
Probable 16,218 kt Lead 2.2 % 357 kt
Probable 16,218 kt Zinc 3.7 % 600 kt
Indicated 14,675 kt Silver 363 g/t 171,486 koz
Indicated 14,675 kt Gold 1.92 g/t 904 koz
Indicated 14,675 kt Lead 2.69 % 395 kt
Indicated 14,675 kt Zinc 4.62 % 677 kt
Inferred 15,634 kt Silver 206 g/t 103,539 koz
Inferred 15,634 kt Gold 1.14 g/t 573 koz
Inferred 15,634 kt Lead 2.4 % 375 kt
Inferred 15,634 kt Zinc 4.81 % 752 kt


Proposed Heavy Mobile Equipment as of January 19, 2018:
HME TypeSizeQuantity
Cable bolter 6
....................... Subscription required 4
....................... Subscription required 9
....................... Subscription required ....................... Subscription required 13
....................... Subscription required ....................... Subscription required 10
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 30, 2020
....................... Subscription required ....................... Subscription required Subscription required Jun 30, 2020
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
Preliminary Economic Assessment 2017
Press Release 2017
Technical Report 2014
Preliminary Economic Assessment 2012
Subscription required - Subscription is required.

News:

NewsDate
MAG Silver Announces First Production From Juanicipio October 21, 2020
MAG Silver Completes US$50M ATM September 8, 2020
MAG Silver Reports Second Quarter Financial Results August 12, 2020
MAG Silver Announces US$50M At-The-Market Offering June 30, 2020
MAG Silver Announces Closing of $60 Million Private Placement April 30, 2020
MAG Silver Announces a $60 Million Private Placement April 27, 2020
MAG Announces Valdecañas 2019 Infill Drilling Results and Discovery of Two New Veins March 3, 2020
Fresnillo plc: Juanicipio Project Update February 24, 2020
MAG Silver Corp.; Fresnillo plc: Juanicipio Development Receives Joint Approval April 11, 2019
MAG Silver and Fresnillo plc Announce PEA Results for Juanicipio JV Project November 8, 2017

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.