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Mexico
Santa Eulalia Mine (IMMSA Operation)

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 Location:
24 km E from Chihuahua, Chihuahua, 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
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
Mining Method
  • Cut & Fill
Processing
  • Flotation


Owners

Source: p. 3, 47
CompanyInterestOwnership
Grupo Mexico S.A. de C.V. 88.91 % Indirect
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.

Deposit Type

  • Skarn


Summary:

The geologic setting of the Santa Eulalia district is similar to other high-temperature, carbonate-hosted Ag-Pb-Zn deposits of northern Mexico. The host rocks are Cretaceous limestones intruded by felsite and diabase dikes and sills.

Mineralization is associated in time and space with the felsite intrusions in two zones known as the East and West camps, which lie on opposite flanks of a broad, doubly plunging anticline. The felsites are texturally and compositionally indistinguishable and have identical REE patterns. West camp mineralization consists of massive sulfide mantos and chimneys with lesser mineralized breccias and skarn bodies. East camp mineralization consists of dike contact skarns with subordinate massive sulfide bodies. Structural controls on mineralization in both camps include reactivated fold-related fracturing and faulting as well as intrusive contacts. Host-rock lithology (specially secondarily enhanced permeability) controls ore distribution in the upper and peripheral parts of the district. Ten different ore types have been recognized in the district, but only the normal sulfides, silicates (calcic-iron skarns), and calc-silicate skarn ores were examined in this study. The ore mineralogy throughout the district is relatively simple, consisting of pyrrhotite, pyrite, sphalerite, and galena with minor amounts of calcite, quartz, fluorite, and in places calc-silicate gangue. Despite stark differences in trace metal contents and the amount and composition of the skarns in the two camps, the overall geologic character, fluid inclusion compositions, sulfur, oxygen and carbon isotope characteristics and alteration assemblages are similar enough to indicate that the ore fluids for both camps had a common origin.

West camp mineralization
Manto and chimney deposits are the most common types of mineralization in the West camp. The ore mineralogy consists of pyrrhotite, galena, sphalerite, and pyrite, replacing limestone with little alteration of the host rock. Skarn mineralization is more limited, present as either silicate or calc-silicate orebodies. Silicate orebodies consist of Ca-Fe silicates with Mn-rich compositions. The silicate orebodies are reported to have higher silver values than the manto ores. Ca-silicate orebodies consist of calcic skarn silicate minerals and an ore assemblage of galena, sphalerite, arsenopyrite, pyrite, and pyrrhotite. Trace amounts of chalcopyrite and pyrrhotite,
argentopyrite, polybasite, and stephanite are also reported as discrete minerals in the calc-silicate ores.

East camp mineralization
Mineralization in the East camp is controlled by structures related to the San Antonio graben and the contacts of a series of felsite dikes that follow and cut across the graben faults. Skarn mineralization dominates and calc-silicate mineralogy is bilaterally and symmetrically zoned outward from the dikes. The dikes are widely converted to calc- silicates. Most of the sulfides in the East camp occur within the skarn, but podiform sphalerite + pyrite ± pyrrhotite bodies (± galena) commonly occur between the skarns
and the enclosing limestone. Massive sulfide mantos composed of galena, sphalerite, and pyrrhotite, are texturally similar to the West camp ores and occur in contact with, and peripheral to, the skarns.


Mining Methods

  • Cut & Fill


Summary:


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

The flotation plant, at which lead and zinc concentrates are produced, has a capacity of 1,450 tons of ore per day. The lead concentrate is treated at a third party refinery, and the zinc concentrate is treated at our San Luis Potosi refinery.

Recoveries & Grades:

CommodityParameter20132012
Zinc Recovery Rate, %  ......  Subscription required  ......  Subscription required
Zinc Head Grade, % 7.645.95
Zinc Concentrate Grade, %  ......  Subscription required  ......  Subscription required
Lead Recovery Rate, %  ......  Subscription required  ......  Subscription required
Lead Head Grade, % 2.22.08
Lead Concentrate Grade, %  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityUnits201420132012
Zinc kt 183813
Lead kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as concentrate.

Operational Metrics:

Metrics2019201820172016201520142011
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required278.2 kt34.6 kt127.1 kt154.3 kt
Annual milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required547.5 kt547.5 kt547.5 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,450 t1,450 t1,450 t
Subscription required - Subscription is required.

Combined reserves/resources are reported under IMMSA Operation



Heavy Mobile Equipment as of December 31, 2013:
HME TypeQuantity
Scoop Tram 11
Truck (haul) 3

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:

EmployeesYear
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2018
Form 10-K 2017
Annual Report 2016
Form 10-K 2016
Annual Report 2015
Form 10-K 2015
Annual Report 2014
Form 10-K 2014
Form 10-K 2013
Other 2009
Other 2000
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Aerial view:

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