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Bolivia
San Bartolomé Mine

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 Location:
3 km S from Potosi, Bolivia

  Address:
Planta Plahipo Km.3 Carretera Tarija
Potosi
Bolivia
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Fax(591-2) 6231584
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Silver
  • Tin
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2025
At San Bartolomé, Andean produces silver primarily through contracts with the state-owned mining company, Corporación Minera de Bolivia (“COMIBOL”).

Andean also maintains various agreements to purchase oxidized, precious metal-bearing material from local miners based on market rates for processing at the San Bartolomé plant.

Material processing takes place at the Company’s San Bartolomé plant, which is the only largescale commercial oxide plant in Bolivia. The San Bartolomé plant produces silver doré bars.


Owners

Source: p. 10
CompanyInterestOwnership
Empresa Minera Manquiri S.A. (operator) 100 % Direct
Andean Precious Metals Corp. 100 % Indirect
The Company owns a 100% interest in, through direct and indirect interests, Empresa Minera Manquiri S.A. ("Manquiri") which is the operator of the San Bartolomé mine and processing facility, near Potosì, Bolivia. The Company is engaged in the exploration, exploitation, treatment, refining and commercialization of doré containing silver and gold, which it extracts from its own mining rights and though purchased third-party material.

Andean extracts material in partnership with the state-owned mining company, COMIBOL. Pursuant to a production agreement, the Company currently pays production royalties to COMIBOL in return for the rights to mine, transport and process mineralized pallacos from the Santa Rita, Huacajchi and Antuco sectors.

Contractors

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Deposit Type

  • Tailings
  • Vein / narrow vein
  • Breccia pipe / Stockwork
  • Alluvial / Placer


Summary:

The mineral deposits at San Bartolomé are alluvial and colluvial, surficial accumulations of silver- and tinbearing unconsolidated material, which were derived from erosion of Cerro Rico, a prominent +4,700 meter elevation mountain, and accumulated down-slope filling depressions, gullies and low-gradient areas. Locally they are called “pallacos” which also includes reworked Sn-bearing gravel deposits called “sucus” and “troceras”. Mineral deposits at Tatasi-Portugalete are man-made, dumps adjacent to underground mine portals of ancient and current mines.

San Bartolomé
The mineral deposits at Cerro Rico are the source of the San Bartolomé pallacos and are high sulfidation epithermal in character, composed of veins, stockworks, hydrothermal breccias and irregular bodies, hosted in a very altered resurgent dome of dacitic- to rhyodacitic-composition porphyritic intrusion emplaced in Middle Miocene time (approx. 14 mya). The pallacos were derived from the erosion of the Cerro Rico hydrothermal ore deposit and were emplaced around the mountain crest by recent geologic processes. These deposits consist of an unsorted mixture of cobbles and boulders in a sandy clay matrix, accumulated down slope by colluvial and alluvial processes, filling depressions, gullies and low-gradient areas. They cover an area of over 5 km2 in size. Geologically, the true thicknesses of the pallacos range from <1 m to nearly 75 m. The deposits have been grouped into three areas named Antuco ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Ore is mined from the Company’s permitted mineral reserve areas:
- The San Bartolomé mine (“pallacos”).
- Dump areas at Tatasi-Portugalete and El Asiento.

The project utilizes conventional surface mining methods to extract colluvial, and alluvial materials mine dumps, oxide and sulfide tailings and other materials named pallacos and sucus and troceras (collectively, the “pallacos”), which have been identified in the Huacajchi, Santa Rita, Diablo (Norte and Sureste areas – now referred to as Antuco) - Pallacos Areas.

An exclusive mineral purchase contract is in place between Manquiri and RALP Compañía Minera, S.R.L., a private, Bolivian mining company (“RALP”). The contractual rights held by Manquiri are for processing of 108,000 tonnes of silver- and gold-bearing material being mined by RALP.

The current mine plan is designed with 5 m benches and 2 m berms. Additional 5 m wide safety berms were included in the design when the slope height exceeds 25 m.

Dump areas at Tatasi-Portugalete and El Asiento will be fully reclaimed in 2 m slices in a top-down sequence. If internal operational slopes are required, the angle of repose of 37° will be considered.

The mining strategy adopted by Manquiri is a mixed between an owner operation and contracted:
• In the pallacos areas Manquiri operates the loading with owned excavators of 2.4 / 2.6 m3 and auxiliary operations (bulldozers and motor graders) and the hauling o ........


Crushing and Grinding
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Processing

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Summary:

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Production:
At Cachi Laguna, Andean has a contract with RALP, a privately held Bolivian company, to purchase and transport a fixed number of tonnes of gold and silver bearing material to the San Bartolomé plant for processing. This production material is expected to be fully depleted during Q2 2023.

CommodityUnits2023202220212020201920182017
Silver Equivalent koz  ......  Subscription required ^
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required1,110,353 t1,137,868 t1,509,708 tons
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2022:
Pallacos mineral resources are reported using the following Ag cut-off Grades: Antuco: 62.9 g/t Ag, Huacajchi: 58.1 g/t Ag and Santa Rita: 61.5 g/t Ag.

A nominal cut-off of US$25/t has been used for reporting the Tailings mineral resource.

A nominal cut-off of US$25.00 per tonne has been used for reporting the mineral resources at the Stockpiles.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured & Indicated 2.319 Mt Silver 91 g/t 6.77 M oz
Measured & Indicated Stockpiles 10.148 Mt Silver 50 g/t 16.2 M oz
Measured & Indicated Stockpiles 10.148 Mt Tin 0.12 % 11.93 kt
Inferred 0.347 Mt Silver 97 g/t 1.09 M oz
Inferred Stockpiles 1.505 Mt Silver 48 g/t 2.3 M oz
Inferred Tailings 18.11 Mt Silver 43 g/t 25.09 M oz
Inferred Stockpiles 1.505 Mt Tin 0.09 % 1.33 kt
Inferred Tailings 18.11 Mt Tin 0.16 % 28.9 kt

Commodity Production Costs:

CommodityUnits202320222021202020192017
Total cash costs (sold) Silver USD 17.4 / oz  
Total cash costs (sold) Silver Equivalent USD
Total cash costs (sold) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (sold) Silver USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2023202220212020201920172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.6  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 73.1   93.9  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -12.2   18  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 29.4  
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Water Supply
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Heavy Mobile Equipment as of February 18, 2015:
HME TypeModelQuantity
Backhoe ....................... Subscription required ....................... Subscription required
Compactor ....................... Subscription required ....................... Subscription required
Dozer ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Financial Review 2022
Management Discussion & Analysis 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
Press Release 2018
Press Release 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Press Release 2016
Year-end Mineral Reserves 2016
Technical Report 2015
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