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Bolivia
San Cristobal Mine

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 Location:
9 km NW from San Cristobal, Bolivia

  Regional Office:
Street Tarija No 12 - Former Banco Bisa
Potosí
Bolivia
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Fax(591-2)-2612-0486
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Silver
  • Lead
  • Zinc
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2030
San Cristobal is a silver-lead-zinc open pit sulphide mine and the biggest silver mine in Bolivia, with an approximate mine life of 7 years.

There is also an oxide silver development project with the potential to extend the operational life through 2040, once the necessary implementations are carried out for the start-up of the new project.


Owners

Source: p. 1
CompanyInterestOwnership
San Cristobal Mining Inc. 100 % Indirect
On February 13, 2023, San Cristobal Mining Inc.completed the acquisition of Minera San Cristóbal S.A. and all of its associated assets from Sumitomo Corporation.

Contractors

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Deposit Type

  • Epithermal


Summary:

The San Cristobal volcanic-intrusive center is unconformable on steeply dipping Eocene-Oligocene Potoco Formation red bed sediments, and lies on the NNE-trending San Cristobal Fault, a major, east-verging thrust. The center a volcano about 12 km in diameter with a low relief of up to 400 m, with flow lobes extending outwards, and a summit depression rimmed by domes.

The central depression is about 4 km in diameter and is filled by up to 300 m thickness of volcaniclasticlacustrine sediments.

The mineralized volcaniclastic-lacustrine sediments fill in a central depression, which is either a graben or a caldera, above welded and non welded lithic-crystal tuffs. The central depression is surrounded by early domes, and the sediments are cut by late rhyodacite domes.

Mineralization is epigenetic and post-dates the late rhyodacite domes. Mineralization is preferentially developed in steep fractures in the peripheral domes, and as disseminations and replacement in the lower parts of the volcaniclastic-lacustrine sediments.

Mineralization in the domes/stocks occurs in irregular open space fractures which may form narrow hydrothermal breccias where there are multiple, intersecting fractures. Mineralization is open space fracture- and breccia-fill and is sulfide-rich, coarse grained and often euhedral, comprising pyrite, Fe-rich sphalerite and galena. The galena is argentiferous and is accompanied by acanthine and native silver. This main st ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The San Cristobal Mine is the largest open-pit mining operation in Bolivian history.

The mining process begins with the drilling of “blast holes” in a grid of 7 by 10 meters, depending on the exact type of rock being extracted from a given location.

This activity is conducted using modern drilling equipment, capable of penetrating the rock and performing at speeds of approximately 1 meter per minute.

MSC uses a system of “silent blasts” to break off rocks in the target area of the open pit, which means a minimum of explosives is used to break the rock without propelling it over a long distance.

The explosives used in this procedure are known as ANFO, a mixture of ammonium nitrate and either diesel fuel or used oil. Blasts are generally performed at noon and follow a strict security protocol that involves isolating the area by closing access roads for a radius of 500 meters in all directions. After the blast, the explosion of all active charges is carefully verified to confirm that no non-blasted charges remain.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Silver Metal in concentrate M oz  ......  Subscription required  ......  Subscription required
Zinc-Silver Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead-Silver Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020
Daily processing capacity  ......  Subscription required52,000 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required10.9 Mt
Total tonnes mined  ......  Subscription required  ......  Subscription required36.6 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required13.8 Mt
Daily mining rate  ......  Subscription required  ......  Subscription required150,000 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required52,000 t
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Reserves at :


Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 9.6   10.9   7.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 843.6   893   567  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 21   221   -88  
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Water Supply
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Heavy Mobile Equipment as of December 31, 2020:
HME TypeModelQuantity
Compactor ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Shovel ....................... Subscription required ....................... Subscription required
Shovel ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Other 2023
Other 2023
Press Release 2023
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Sustainability Report 2018
Sustainability Report 2017
Sustainability Report 2016
Sustainability Report 2015
Sustainability Report 2015
Project Description 2014
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