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Argentina
Lindero Mine

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 Location:
238 km W from Salta, Argentina

  Address:
Piso 2 Av. Reyes Católicos # 1224
Salta
Argentina
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  • Overview
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  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life12 years (as of Jan 1, 2021)


Owners

Source: p. 14, 15, 52
CompanyInterestOwnership
Fortuna Silver Mines Inc. 100 % Indirect
Mansfield Minera S.A. (operator) 100 % Direct
Fortuna Silver Mines operates the open pit Lindero gold mine in northern Argentina. Mansfield Minera S.A. is the principal subsidiary of Fortuna Silver. Mansfield Minera S.A. – operates the Lindero gold mine.

Contractors

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Deposit Type

  • Porphyry
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

The Lindero Project contains two known porphyry gold-copper deposits. The Lindero Deposit is the focus of the Feasibility Study and the Lindero Technical Report; whereas the Arizaro Deposit, located 3.2 km southeast of the Lindero Deposit, is described only in terms of exploration conducted to date.

In the Central Andes, the altiplano or puna is a high plateau of more subdued relief between the Eastern Cordillera, a rugged region usually rising to between 3 km and 4.5 km, and the Western Cordillera, which is a high spine of mountains that may reach as much as 5 km in height. The Arizaro Volcanic Complex consists of two superimposed concentric volcanic centers, the Arizaro and the Lindero cones, located in the Archibarca volcanic arc at the southern margin of the Salar de Arizaro basin. Basement rocks crop out to the north of the Lindero Deposit, and consist of coarse- grained Ordovician granites uncomformably overlain by Early Tertiary red bed sandstones. The Lindero– Arizaro complex, a series of diorite to monzonite porphyritic stocks, intrudes these units.

Mineralized zones at the Lindero Deposit form a semi-circular shape about 600 m in diameter which extends to a depth of 600 m, consisting of four different zones at the surface. The distribution of gold–copper mineralization at Lindero shows a strong relationship to lithology, stockwork veinlets, and alteration assemblages. Gold values average 0.70 g/t Au and copper values are typically about 0.11 % ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining Methods
The Lindero Deposit is suitable for open pit mining methods. Gold grade distribution and the results of the mineral processing testing indicate that ore from Lindero can be processed by conventional heap leaching methods.

The Lindero Project has been planned as an open pit truck and wheel loader operation. The truck and wheel loader method provide reasonable cost benefits and selectivity for this type of deposit. Only open pit mining methods are considered for mining at Lindero.

Pit designs
Detailed pit design was completed, including an ultimate pit and five internal phased pits. The ultimate pit was designed to allow mining of mill feed material identified by NPVS optimization while providing safe access for people and equipment. Internal pits or phases within the ultimate pits were designed to enhance the Project economics by providing higher-value material to the leach pad earlier in the mine life

Bench height
Pit designs were developed based on 8 m benches for mining. This corresponds to the resource model block heights, and Fortuna believes this to be reasonable with respect to dilution and equipment anticipated to be used in mining.

Feb. 20, 2019
All mine equipment required for the start of operations has arrived and has been assembled on site including; six 100 ton trucks, two 17 cubic yard wheel loaders, one 5 cubic yard crawler excavator, two 449 HP dozers, two 250 HP motor ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits202220212020Avg. Annual (Projected)LOM (Projected)
Gold Total oz  ......  Subscription required ^  ......  Subscription required
Gold Metal in doré oz  ......  Subscription required  ......  Subscription required1,149,900
Gold Payable metal oz 96,0001,148,800
^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Stripping / waste ratio  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily processing rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Reserves at December 31, 2021:
Mineral Reserves for the Lindero Mine are reported based on open pit mining within a designed pit shell based on variable gold cut-off grades and gold recoveries by metallurgical type. Met type 1 cut-off 0.26 g/t Au, recovery 75.4%; Met type 2 cutoff 0.25 g/t Au, recovery 78.2%; Met type 3 cut-off 0.25 g/t Au, recovery 78.5%; and Met type 4 cut-off 0.28 g/t Au, recovery 68.5%.
Mineral Resources are reported within the same conceptual pit shell above a 0.2 g/t Au cut-off grade based on the same parameters used for Mineral Reserves and a 15% upside in metal prices.

CategoryTonnage CommodityGradeContained Metal
Proven 25,786 kt Gold 0.66 g/t 546 koz
Probable 62,821 kt Gold 0.53 g/t 1,068 koz
Proven & Probable 88,607 kt Gold 0.57 g/t 1,614 koz
Measured 1,723 kt Gold 0.5 g/t 28 koz
Indicated 31,552 kt Gold 0.38 g/t 387 koz
Measured & Indicated 33,275 kt Gold 0.39 g/t 415 koz
Inferred 27,052 kt Gold 0.43 g/t 373 koz

Commodity Production Costs:

CommodityUnits202220212020
Cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†
Cash costs Gold USD  ......  Subscription required†
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†
All-in costs Gold USD  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 27.5  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -4.1  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.3  
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Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of December 31, 2018:
HME TypeSizeQuantity
Dozer 449 HP ....................... Subscription required
Drill (blasthole) 800 HP ....................... Subscription required
Excavator 5 cu. yd ....................... Subscription required
Grader 250 HP ....................... Subscription required
Loader 17 cu. m ....................... Subscription required
Truck (haul) 100 tons ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2017
Feasibility Study Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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