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Nicaragua
El Limon Complex

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 Location:
38 km NE from Leon, 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
  • Avoca
  • Backfill
Production Start...
Mine Life2029
The active El Limón mining units include Santa Pancha 1 UG, Panteón UG, Veta Nueva UG, and the Limón Central OP. Panteón is still under development.
Latest NewsCalibre Continues to Expand the New High-Grade Gold Discovery at Panteon North & Along the Multi-Kilometre VTEM Gold Corridor...     March 21, 2023


Owners

Source: p. 4
CompanyInterestOwnership
Calibre Mining Corp. 100 % Indirect

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

According to Pearson and Speirs (2009), El Limón’s vein system is classified as a low sulphidation epithermal system. Gold mineralization in the Limón district is structurally controlled and forms veins that occupy pre-existing fault structures and extensional openings formed during mineralization. The veins are quartz dominant with lesser and variable quantities of calcite, and minor adularia. Pyrite is the predominant sulphide, but with a content of less than one percent. Trace amounts of chalcopyrite, sphalerite, arsenopyrite, altaite, gold tellurides, and native gold are also reported to occur. Gold is present in both banded quartz and silicified breccias that form the veins. Gold is very fine grained within the quartz vein and is relatively uniformly distributed throughout the higher grade parts of the veins. Only once has visible gold been reported on the Project concession. The productive vein systems are approximately one to two kilometres long, with vein widths from less than one metre up to 25 m. Individual mineralized shoots within the veins range from 60 m to 450 m long horizontally, and from 40 m to 290 m vertically. Strike orientations vary from north-northwest through northeast to east-west, and dips are from 40° to nearly vertical. All economic gold mineralization discovered and mined to date lies within 400 m of surface. The productive and prospective elevations within the vein systems vary across the district. Post-mineral faults locally disrupt and offset ........


Mining Methods

  • Longitudinal open stoping
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Avoca
  • Backfill


Summary:

The active El Limón mining units include Santa Pancha 1 UG, Panteón UG, Veta Nueva UG, and the Limón Central OP.

El Limón’s underground mines are trackless mechanized operations that have ramp access. The deposits being mined consist of narrow steeply dipping veins, and ore is mined with longitudinal sublevel stoping type mining methods. Santa Pancha 1 and Veta Nueva are producing mines, while Panteón is still at the development stage. Santa Pancha 1 is an old mine redeveloped as a trackless operation and has been in production since 2015. Panteón is a former producing mine that was idle for almost two decades until Calibre initiated a project to mine several of its remaining zones. Veta Nueva is a new mine that began producing ore in 2019.

The Limón Central OP is a conventional open pit mine with six metre bench heights, using drilling and blasting for rock breakage, and excavators and trucks for materials handling.

Underground Mining
El Limón has two underground mines, Santa Pancha 1 and Veta Nueva, that are in production and a third, Panteón, that is presently under development. All the underground mines are mechanized and use sublevel-stoping type mining methods.

Santa Pancha 1
The mining method applied at Santa Pancha 1 is uphole sublevel retreat stoping with no backfill. It involves dividing the vein into sublevels and mining the horizons of ore between veins as lifts in a topdown sequence. Longholes are drilled as u ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

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 required49,62942,77645,483
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required482,053 t447,961 t458,419 t467,404 t
Daily milling rate  ......  Subscription required  ......  Subscription required
Annual milling capacity  ......  Subscription required  ......  Subscription required500,000 t
Waste  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Underground (UG) Mineral Resources are reported at cut-off grades of 2.19 g/t Au for Limón Central, Norte and Tigra UG, 2.82 g/t Au for Santa Pancha 1 and 2 UG, 2.72 g/t Au for Panteon UG, 2.00 for Veta Nueva UG, and 2.15 g/t Au for Atravesada UG.

Open Pit (OP) Mineral Resources are estimated at cut-off grades of 1.00 g/t Au for the Limón open pits and 0.00 g/t Au for Stockpile and Tailings.

Underground Mineral Reserves are estimated at cut-off grades of 3.01 g/t Au for Santa Pancha 1 UG, 2.90 g/t Au for Panteon UG, 2.13 g/t Au for Veta Nueva UG, and 2.30 g/t Au for Atravesada UG.

Open pit Mineral Reserves are estimated at cut-off grades of 1.07 g/t Au for Pozo Bono/Limón Sur OP, 1.05 g/t Au for Limón Central OP, 1.11 g/t Au for Limón Norte OP, 1.10 g/t Au for Tigra OP.

CategoryTonnage CommodityGradeContained Metal
Probable 3,678 kt Gold 4.47 g/t 529 koz
Probable 3,678 kt Silver 2.7 g/t 320 koz
Indicated 13,567 kt Gold 2.69 g/t 1,175 koz
Indicated 13,567 kt Silver 1.2 g/t 549 koz
Inferred 1,366 kt Gold 4.05 g/t 177 koz
Inferred 1,366 kt Silver 2.9 g/t 125 koz

Commodity Production Costs:

CommodityUnits20202019201820172016
Cash costs Gold USD  ......  Subscription required† 926 / oz†   954 / oz†   781 / oz†  
Cash costs (sold) Gold USD  ......  Subscription required†
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
Total cash costs Gold USD 1,009 / oz†   1,020 / oz†   862 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD 1,466 / oz†   1,469 / oz†   1,189 / oz†  
† Net of By-Product.

Operating Costs:

Units2015
Combined mining costs ($/t mined) USD 37.7
Processing costs ($/t milled) USD  ......  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 22   16   7.7  
Revenue M USD  ......  Subscription required  ......  Subscription required 68.5   49.6   56.4  
Operating Income M USD  ......  Subscription required


Water Supply

Water supply for exploration and operation activities is taken from three groundwater supply wells and six surface water withdrawal locations authorized by the National Water Authority (Autoridad Nacional del Agua [ANA]). The well located in the Santa Pancha site provides water for underground drilling. The two wells located in El Limón site are used for irrigation of the San José garden centre and for ore processing, respectively. Surface water withdrawal is used for exploration drilling, underground drilling, and ore processing.

Water from the TSF is reclaimed directly to the process plant. Two TSF barge pumps control the volume of supernatant water stored in the tailings pond. Seepage from the TSF is collected and either pumped back to the tailings pond or released to the environment if it meets water quality standards.


Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantity
Concrete sprayer ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required 3.5 cu. m ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required
Rock bolter ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 36 cu. m ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

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 Dec 21, 2022
Subscription required - Subscription is required.


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
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Press Release 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Management Discussion & Analysis 2015
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News:

NewsDate
Calibre Continues to Expand the New High-Grade Gold Discovery at Panteon North & Along the Multi-Kilometre VTEM Gold Corridor... March 21, 2023
Calibre Presents a Golden Opportunity: Breaking Records With Gold Production and Revenue in 2022; Gaining Momentum in 2023 With 20% Production Growth to 250,000 to 275,000 Ounces February 22, 2023
Calibre Increases Nicaraguan Mineral Reserve Grade by 16% and Nevada Mineral Reserves Grow by 23%, Net of Production Depletion February 14, 2023

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