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Nicaragua
La Libertad Complex (Pavon Mine)

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 Location:
4 km NW from La Libertad, Nicaragua

  Regional Office:
Residencial Las Colinas, Kinder Montessori 1 C. al E, 1 C. al N, 80 mts al E, #273
Managua
Nicaragua
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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 & Underground
Commodities
  • Gold
  • Silver
Mining Method
  • Longitudinal open stoping
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
  • Avoca
  • Cemented backfill
Production Start...
Mine Life2028
The La Libertad Complex consists of two operating mine sites, La Libertad and Pavón, delivering mill feed to the 6,200 tpd La Libertad processing plant and the Eastern Borosi Project, an early development stage project.

At the La Libertad Complex, Calibre has two open pit mines currently in operation, three that are planned to be developed within the next two years.

The La Libertad Complex operation includes two underground mines, the currently operating Jabalí West mine at Libertad and the early development stage Riscos de Oro mine at the EBP.


Owners

Source: p. 4
CompanyInterestOwnership
Calibre Mining Corp. 100 % Indirect
The La Libertad Complex is held 100% by Calibre, through its Desarrollo Minero de Nicaragua, S. A. (DESMINIC) subsidiary.

Contractors

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Deposit Type

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


Summary:

The epithermal gold-silver deposits at La Libertad and Pavón can be assigned to the low sulphidation subclass of deposits.

La Libertad Mine
Gold mineralization at La Libertad is contained within multiple vein systems emplaced along zones of extensional dilation within the district scale fault network described above. The most productive vein systems in the district to date include the northeast trending Mojón – Crimea, Santa María – Esmeralda, San Francisco – Los Angeles, San Juan – Mestiza systems, and the east-west trending Jabalí and Santo Domingo vein systems. The following provides a generalized description of mineralization in the Jabalí and Mojon – Crimea vein systems which have been the principal sources of production at La Libertad during the past 15 years.

The Jabalí vein system occurs along an east-west trending fault zone that has been traced on surface over a distance of more than six kilometres. To date, exploration drilling has tested more than 3,950 m of the Jabalí vein system. The vein system dips to the north, varying from 60° to 80° north. Mineral Resources have been developed in the near surface Jabalí Antena open pit and Jabalí West underground mines, which are the primary sources of current production at La Libertad.

Gold mineralization occurs primarily as electrum in association with pyrite and lesser sphalerite within massive to banded quartz veins, vein stockworks and localized breccias developed along the east-we ........


Mining Methods

  • Longitudinal open stoping
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
  • Avoca
  • Cemented backfill


Summary:

Open Pit Operations
At the La Libertad Complex, Calibre has two open pit mines currently in operation, three that are planned to be developed within the next two years. Jabalí Antena and Rosario are situated at La Libertad, Pavón Norte and Pavón Central are located at Pavón, EBP-GV is situated at the EBP. Mill feed material from Pavón and EBP is trucked to the La Libertad processing plant.

La Libertad Mine - Jabalí Antena
Jabalí Antena is an existing open pit gold mine. Mining at Jabalí Antena is carried out using a conventional open pit truck and shovel mining methods with a total production schedule of 145,000 t of ore and 0.9 Mt of waste to be mined in 2022 and 2023 for Phase 2 (East Extension). The open pit has been designed in two phases, with Phase 1 already completed in 2020, and mining of Phase 2 (East Extension) scheduled to commence in H2 2022 and completed by the end of 2023. In compliance with a local community permitting requirement, the East Extension pit limit has been constrained and only weathered material is scheduled to be mined, excluding drilling and blasting hard rock material on the west side of the pit.

The Jabalí Antena pit design criteria were based on a conventional surface mine operation 5.0 m3 backhoe excavators, and haulage by a fleet of 40 t capacity trucks. Jabalí Antena is operated by a mining contractor. A ramp width of 10.0 m has been selected for the operation of 40 t trucks.

Design ........


Crushing and Grinding
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Processing

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Summary:

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Production:
On October 15, 2019, Calibre acquired B2Gold’s interest in the El Limon and La Libertad gold mines, the Pavon gold project and additional mineral concessions in Nicaragua (collectively, the “Nicaragua Assets”).

CommodityUnits202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required80,96382,337132,431
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202120202019201820172016
Tonnes milled  ......  Subscription required  ......  Subscription required2,139,104 t2,250,687 t2,161,917 t2,277,795 t
Daily milling capacity  ......  Subscription required  ......  Subscription required6,250 t
Annual milling capacity  ......  Subscription required  ......  Subscription required2.25 Mt
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Resources are estimated at gold cut-off grades from 0.69 g/t to 3.59 g/t, except at Blag and East Dome, which are estimated at a gold equivalent (AuEq) cut-off grade of 2.00 g/t, and La Luna OP which is estimated at a gold equivalent (AuEq) cut-off grade of 0.42 g/t.

Underground Mineral Reserves are estimated at fully costed and incremental cut-off grades of 2.75 g/t Au and 1.95 g/t Au, respectively, for Jabalí West and 3.42 g/t Au and 2.41 g/t Au for Riscos de Oro.

Open pit Mineral Reserves are estimated at a cut-off grade of 0.79 g/t Au for Jabalí Antena 0.74 g/t Au for Rosario, and 1.27 g/t Au for Pavón Norte and Pavón Central, and 1.81 g/t Au for the EBP.

CategoryTonnage CommodityGradeContained Metal
Probable 3,173 kt Gold 4.75 g/t 485 koz
Probable 3,173 kt Silver 26 g/t 2,650 koz
Measured 168 kt Gold 4.32 g/t 23 koz
Measured 168 kt Silver 13 g/t 71 koz
Indicated 3,950 kt Gold 4.79 g/t 608 koz
Indicated 3,950 kt Silver 30.8 g/t 3,914 koz
Measured & Indicated 4,118 kt Gold 4.77 g/t 631 koz
Measured & Indicated 4,118 kt Silver 30.1 g/t 3,985 koz
Inferred 6,327 kt Gold 3.57 g/t 726 koz
Inferred 6,327 kt Silver 40.9 g/t 8,300 koz

Commodity Production Costs:

CommodityUnits20202019201820172016
Cash costs Gold USD  ......  Subscription required† 934 / oz†   836 / oz†   659 / oz†  
Cash costs (sold) Gold USD  ......  Subscription required†
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
Total cash costs Gold USD 960 / oz†   863 / oz†   685 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD 1,192 / oz†   1,106 / oz†   904 / oz†  
† Net of By-Product.

Operating Costs:

Units202120162015
OP mining costs ($/t mined) USD 2.9522.1
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 16.1   23.8   18.5  
Revenue M USD  ......  Subscription required  ......  Subscription required 105.2   104.8   163.7  
Operating Income M USD  ......  Subscription required


Water Supply

Process water supply totalling 1,450 gallons per minute (gpm) from a variety of sources on the site.


Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
Backhoe 5 cu. m Leased
Backhoe ....................... Subscription required ....................... Subscription required Leased
Dozer (crawler) ....................... Subscription required Leased
Dozer (crawler) ....................... Subscription required Leased
Dozer (crawler) ....................... Subscription required Leased
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required Leased
Excavator ....................... Subscription required ....................... Subscription required Leased
Grader ....................... Subscription required Leased
Jumbo ....................... Subscription required ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Leased
Rock bolter ....................... Subscription required ....................... Subscription required Leased
Rock bolter ....................... Subscription required ....................... Subscription required Leased
Shotcreter ....................... Subscription required ....................... Subscription required Leased
Truck (dump) ....................... Subscription required ....................... Subscription required Leased
Truck (dump) ....................... Subscription required ....................... Subscription required Leased
Truck (haul) ....................... Subscription required 40 t Leased
Truck (underground) ....................... Subscription required ....................... Subscription required Leased
Truck (underground) ....................... Subscription required ....................... Subscription required Leased
Truck (water) ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 13, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Press Release 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Annual Information Form 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Management Discussion & Analysis 2015
Technical Report 2015
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