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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
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2022
Silver ounces are produced from the Company’s permitted mineral reserve areas, as well as from purchased third-party ore materials.

Production from purchased sources of mill feed (“compras”) has been a source of important cash flow. This should continue as long as metallurgy and production (including tailings) capacity is favorable.


Owners

Source: p. 3,6
CompanyInterestOwnership
Empresa Minera Manquiri S.A. (operator) Indirect
Andean Precious Metals Corp. Indirect
The Bolivian national mining company, Corporación Minera de Bolivia (COMIBOL), is the underlying owner of all the mining rights relating to San Bartolomé.

Andean Precious Metals Corp. owns a 100% interest in Empresa Minera Manquiri S.A. ("Manquiri"), which operates the San Bartolomé mine and processing facility through contracts with the state-owned mining company, Corporación Minera de Bolivia (“COMIBOL”).

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

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2022202120202019201820172016
Silver koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required2,6374,2705,469
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required1,110,353 t1,137,868 t1,509,708 tons1,666,787 tons
Daily milling rate  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2021:
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 $US25 has been used for reporting the mineral resources at the Fines Disposal Facility (FDF).

No Mineral Reserves are stated in the technical report. The technical work needed to state mineral reserves for the updated mineral resources presented herein is under way at the time of this disclosure.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Tailings 183 kt Silver 323 g/t 1.9 M oz
Measured Oxide 1,078 kt Silver 91.2 g/t 3.16 M oz
Indicated Tailings 10,227 kt Silver 51.8 g/t 17.02 M oz
Indicated Oxide 1,985 kt Silver 85.5 g/t 5.46 M oz
Indicated Tailings 10,148 kt Tin 0.12 % 11.93 kt
Inferred Tailings 1,521 kt Silver 49.9 g/t 2.44 M oz
Inferred Oxide 463 kt Silver 91.4 g/t 1.36 M oz
Inferred Tailings 1,505 kt Tin 0.09 % 1.33 kt

Commodity Production Costs:

CommodityUnits202220212020201920172016
Total cash costs (sold) Silver USD 17.4 / oz  
Total cash costs (sold) Silver Equivalent USD 13.7 / oz  
Total cash costs (sold) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (sold) Silver USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units20212020201920172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.6  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 73.1   93.9  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -12.2   18  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 29.4  
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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 Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
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Staff:

EmployeesYear
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... 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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