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Mexico
San Martin Mine (IMMSA Operation)

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 Location:
11 km NW from Sombrerete, Zacatecas, Mexico

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

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Copper
  • Silver
  • Lead
Mining Method
  • Mechanized Cut & Fill
  • Hydraulic backfill
Production Start...


Owners

Source: p. 3, 67
CompanyInterestOwnership
Grupo Mexico S.A. de C.V. 88.87 % Indirect
Ownership Tree
Industrial Minera Mexico, S.A. de C.V. (together with its subsidiaries, the “IMMSA unit”) operates five underground mines that produce zinc, lead, copper, silver and gold, a coal mine and a zinc refinery.

IMMSA’s principal mining facilities include Charcas, Santa Barbara, San Martin, Santa Eulalia and Taxco.

Contractors

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Deposit Type

  • Skarn
  • Vein / narrow vein


Summary:

The Zn-Pb-Cu (- Ag ± Au) San Martín deposit in northwestern Zacatecas is one of the most economically important and largest skarns in México. Mineral associations in this deposit belong to the sulfide skarn type (with rather "classical" prograde and retrograde zones) and contain peripheral sub-epithermal to epithermal veins.

The San Martín skarn deposit was formed by a hydrothermal system associated with intrusion of the 46-m.y.-old Cerro de la Gloria quartz monzonite stock into the middle Cretaceous Cuesta del Cura limestone. The deposit is exploited by two major mines. The San Martín mine extracts Cu-Zn-Ag ore from veins and replacement bodies hosted by skarn, and the Sabinas mine extracts Zn-Pb-Ag (+ or - Au) ore from veins hosted by skarn and recrystallized limestone.

The vein system represents a series of intrusion-related fractures that roughly parallel the intrusive contact and that served as major conduits for the ore-forming fluids. Formation of both the vein system and sulfide-hosting in skarn probably was aided by volume loss during metasomatism. Other retrograde phases include wollastonite, vesuvianite, epidote, and chlorite; fluorite and calcite are common, and minor quartz is also present.

In the area of San Martín the Cretaceous Cuesta del Cura and Indidura Formations consist of limestones with thin interbeds of flint and shale. It has been observed in the lower levels of the San Martín mine, as well as in deep diamond holes o ........


Mining Methods

  • Mechanized Cut & Fill
  • Hydraulic backfill


Summary:

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.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:
San Martin restarted operations during the second quarter of 2019.

CommodityProductUnits202120202019
Zinc Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate M oz  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate t  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Tonnes milled  ......  Subscription required  ......  Subscription required653.7 kt
Annual milling capacity  ......  Subscription required  ......  Subscription required1,606 kt1,606 kt1,606 kt1,606 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required4,400 t
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Reserves at December 31, 2021:
The NSR values is “above/below” a cut-off grade the operating unit cost of US$57.59/t.

CategoryTonnage CommodityGradeContained Metal
Indicated 11,728 kt Zinc 2.65 % 310.9 kt
Indicated 11,728 kt Copper 0.62 % 73.2 kt
Indicated 11,728 kt Silver 97 g/t 36,647 koz
Indicated 11,728 kt Lead 0.55 % 64.2 kt
Inferred 8,369 kt Zinc 2.18 % 182.7 kt
Inferred 8,369 kt Copper 0.53 % 44.3 kt
Inferred 8,369 kt Silver 107 g/t 28,716 koz
Inferred 8,369 kt Lead 0.61 % 51.2 kt

Financials:

Units202120202019201820172016
Book Value M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.4   28.2   25.2  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2013:
HME TypeQuantity
Scoop Tram ....................... Subscription required
Truck (haul) ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required Subscription required 2021
Subscription required 2013

Corporate Filings & Presentations:

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

Subscription required - Subscription is required.

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