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Mexico
IMMSA Operation (Charcas Mine, San Martin Mine, Santa Barbara Mine, Santa Eulalia Mine, Taxco Mine)

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 Location:
11 km NW from Sombrerete, Mexico

  Address:
Campos Elíseos N° 400 Colonia Lomas de Chapultepec Delegación Miguel Hidalgo
Mexico city
Mexico, Mexico
11000
Phone  ...  Subscription required
Fax(5255)-1103-5567
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
  • Gold
Mining Method
  • Mechanized Cut & Fill
  • Cut & Fill
  • Longhole stoping
  • Shrinkage stoping
  • Longhole open stoping
  • Bench stoping
  • Room-and-pillar
  • Backfill
  • Hydraulic backfill
Production Start...
IMMSA unit (underground mining poly-metallic division) operates five underground mining complexes situated in central and northern Mexico and produces zinc, lead, copper, silver and gold.

IMMSA’s principal mining facilities are Charcas, Santa Barbara, San Martin, Santa Eulalia (temporary suspended), and Taxco (on strike since July 2007).


Owners

Source: p. 4
CompanyInterestOwnership
Grupo Mexico, S.A.B. de C.V. 88.87 % Indirect
Ownership Tree
In April 2005, we acquired Minera Mexico, from Americas Mining Corporation (“AMC”), a subsidiary of Grupo Mexico, our controlling stockholder. Minera Mexico is a holding company and all of its operations are conducted through subsidiaries that are grouped into three units: the La Caridad unit, the Buenavista unit, the IMMSA unit. Southern Copper Corp owns 99.96% of Minera Mexico.

Contractors

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Deposit Type

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


Summary:

IMMSA unit includes Charcas, Santa Barbara, San Martin, Santa Eulalia and Taxco. Charcas The Charcas mining district is in the east-central part of the central mesa of Mexico, which is part of the larger metallogenic province of Sierra Madre. The mineral deposits found within the Charcas mining district are tertiary polymetallic skarn (silver, lead, zinc and copper) deposits hosted in carbonate rocks of the Jurassic-Cretaceous periods and in shales and sandstones of the Late Triassic. In the carbonate rocks, veins and mantos form the predominant mineralization, while less mineralized fractures tend to occur within the shales and sandstones. The varied style of mineralization largely corresponds to the lithological variety of units that serve as host rocks. The Charcas intrusive complex (“CIC”) was emplaced in Triassic to upper Cretaceous sedimentary rocks. Some dikes from the CIC have developed metamorphic halos with related polymetallic mineralization. There are two recognized stages of mineralization. In the first stage, the mineralization is enriched in silver, lead, and zinc and characterized with calcite and small quantities of quartz and chalcopyrite (CuFeS) present. In the second stage, the mineralization is copper and silver rich with lesser amounts of chalcopyrite. The mineralization also includes lead ore with associated silver, plus pyrite and only minor amounts of sphalerite (ZnS). The mineralization occurs as replacement sulfides in carbonate rocks and as filli ........


Mining Methods

  • Mechanized Cut & Fill
  • Cut & Fill
  • Longhole stoping
  • Shrinkage stoping
  • Longhole open stoping
  • Bench stoping
  • Room-and-pillar
  • Backfill
  • Hydraulic backfill


Summary:

IMMSA unit includes Charcas, Santa Barbara, San Martin, Santa Eulalia and Taxco.

Charcas
The Charcas complex includes three underground mines: San Bartolo, Rey-Reina and LaAurora.

Charcas is exploited underground by room and pillar with hydraulic cut and fill. The crushed ore is transported to the surface for processing in the flotation plant.

Mining is completed using a mechanized cut-and-fill mining method with rockfill. Ramps and levels are developed to provide access to the ore. Attack ramps are then driven to access each cut. The ramps and level development are performed using jumbos.

San Martin
Mining is completed using a mechanized Cut and Fill mining method with rockfill and with tailings (hydraulic) and dry tailings. Ramps and levels are developed to provide access to the ore. Attack ramps are then driven to access each cut. The ramps and level development are performed using jumbos. San Martín has been testing the long hole stopping mining methodology after the operation resuming.

Santa Barbara
Santa Barbara includes three main underground mines (San Diego, Segovedad and Tecolotes). The mining operations at Santa Barbara are more diverse and complex than any of the other mines in Companys Mexican operations, with veins that aggregate approximately 21 kilometers in length.

Due to the variable characteristics of the ore bodies, four types of mining methods are used: shrinkage stoping, lo ........


Crushing and Grinding

Santa Barbara
The Santa Barbara concentrator plant includes the following equipment:
• Six primary jaw crushers,
• one secondary crusher,
• two tertiary crushers,
• three mills, and
• three flotation circuits.


Processing

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Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Zinc Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required716974
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required135129140
Lead Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required4,242 kt3,911 kt3,277 kt2,871 kt
Tonnes milled  ......  Subscription required  ......  Subscription required4,242 kt3,911 kt3,277 kt2,871 kt
Subscription required - Subscription is required.

Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Indicated 41.1 Mt Zinc 2.97 % 2,689 M lbs
Indicated 41.1 Mt Lead 1.27 % 1,153 M lbs
Indicated 41.1 Mt Copper 0.55 % 497.6 M lbs
Indicated 41.1 Mt Silver 96 g/t 126,819 koz
Indicated 23.5 Mt Gold 0.28 g/t 210 koz
Inferred 44.3 Mt Zinc 3.15 % 3,079 M lbs
Inferred 44.3 Mt Lead 1.31 % 1,282 M lbs
Inferred 44.3 Mt Copper 0.54 % 527.3 M lbs
Inferred 44.3 Mt Silver 101.5 g/t 144,580 koz
Inferred 19.7 Mt Gold 0.17 g/t 107 koz

Financials:

Units2022202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 60   36.5   35.8  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 89.3   73.8   56.8  
Book Value M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 448.3   433.8   448.7  
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Water Supply
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 18, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Form 10-K 2022
Technical Report 2022
Technical Report 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Form 10-K 2018
Form 10-K 2017
Form 10-K 2016
Form 10-K 2015
Form 10-K 2013
Subscription required - Subscription is required.

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