Overview
Stage | Production |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Longitudinal open stoping
- Sub-level stoping
- Avoca
- Unconsolidated rockfill
|
Production Start | ... |
Mine Life | 2029 |
El Limón currently operates six mines and has all required infrastructure necessary for a mining complex including:
• Three underground mines: Santa Pancha 1, Panteón, and Atravesada. • Three open pit mines: Limón Norte, Pozo Bono/Sur, and Tigra. • A conventional processing plant with agitated cyanide leaching and carbon adsorption.
During 2024, Calibre Mining plans to maintain an exploration activity at El Limon with 4 to 5 exploration drills active throughout the year. |
Latest News | Calibre Announces Closing of C$115 Million Financing April 16, 2024 |
Source:
p. 7
The El Limon Complex is held 100% by Calibre, through its Triton Minera S.A. subsidiary.
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 locall ........
Mining Methods
- Truck & Shovel / Loader
- Longitudinal open stoping
- Sub-level stoping
- Avoca
- Unconsolidated rockfill
Summary:
El Limón currently operates six mines and has all required infrastructure necessary for a mining complex including:
• Three underground mines: Santa Pancha 1, Panteón, and Atravesada(Commercial production at Atravesada was achieved in Q3 2023).
• Three open pit mines: Limón Norte(Stripping at Limon Norte started in May 2023), Pozo Bono/Sur, and Tigra.
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 ........
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Flow Sheet:
Summary:
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Source:
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Reserves at December 31, 2023:
Open pit Mineral Resources are reported within an optimized pit shell above cut-off grades ranging from 1.00 g/t Au to 1.13 g/t Au. Underground Mineral Resource are reported within mineralization wireframes at a block cut-off grade of 2.25 g/t Au, where grade, continuity, and thickness were used to demonstrate Reasonable Prospects for Eventual Economic Extraction, or within resource panels generated at cut-off grades from 2.00 g/t Au to 3.03 g/t Au.
Open pit (OP) Mineral Reserves are estimated at cut-off grades ranging from 1.15 g/t Au to 1.20 g/t Au. Underground (UG) Mineral Reserves are estimated at fully costed cut-off grades ranging from 2.30 g/t Au to 3.36 g/t Au, and incremental cut-off grades ranging from 1.92 g/t Au to 2.91 g/t Au.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
3,377 kt
|
Gold
|
5.89 g/t
|
639 koz
|
Probable
|
3,377 kt
|
Silver
|
5.43 g/t
|
589 koz
|
Indicated
|
12,861 kt
|
Gold
|
3.05 g/t
|
1,259 koz
|
Indicated
|
12,861 kt
|
Silver
|
1.91 g/t
|
791 koz
|
Inferred
|
1,566 kt
|
Gold
|
4.46 g/t
|
224 koz
|
Inferred
|
1,566 kt
|
Silver
|
3.54 g/t
|
177 koz
|
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