Overview
Stage | Construction |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Post Pillar Cut & Fill
- Overhand Cut & Fill
- Undefined backfill
|
Production Start | ... |
Mine Life | 5 years (as of Jan 1, 2019) |
EC120 Project means the combined operation at El Cajón and Zone 120 silver-copper deposits which are part of Cosalá Operations.
In 2024 the Americas Gold and Silver plans to accelerate development into the Zone 120 and El Cajon orebodies to allow for sufficient operating faces to begin commercial production from EC120 in Q4 2024.
In late 2023 mining began in the Zone 120 deposit. The El Cajón mine is currently on care and maintenance. |
Latest News | Americas Gold and Silver Corporation Provides Q1-2024 Production Results; Appoints Jim Currie as Chief Operating Officer May 1, 2024 |
Source:
p. 8,33
The Cosalá Operations is 100% owned and operated by Americas’ wholly-owned subsidiaries, Platte River Gold Inc., Minera Platter River Gold S.A. de R.L. de C.V. and Minera Cosalá S.A. de C.V.
Contractors
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Summary:
Zone 120 in the eastern portion of the San Rafael deposit contains silver-copper mineralization within garnet-pyroxene-calcite skarn. The strong metasomatic alteration and the close spatial relationship with a large dioritic intrusion suggest that Zone 120 represents a proximal skarn deposit. El Cajón is a proximal silver-copper skarn related to an adjacent nearly cylindrical diorite intrusive body. Mineralization at El Cajón is replacement type and occurs as horizons in recrystallized limestone which are connected by mineralized zones localized by steeply dipping contacts, faults and fractures.
Zone 120 occurs not as a single horizon, but as multiple bedding- and intrusive-contact-related mineralized horizons. As currently defined, the Zone 120 mineralization occurs within a rock volume that is approximately 600m long, 250m wide and extends to a depth of about 350m below the surface. It strikes in a direction of 330°, and below the massive sulphide, the bedding-related mineralization dips steeply to the northeast at approximately 50°. The Zone 120 mineralization is interpreted to occur along near-vertical contacts between diorite and skarn-altered lime rich volcarenites in the lower parts, and in quartz-sericite-pyrite-altered volc-arenites in the upper portions. The quartz altered material is now referred to as hornfels, differing from earlier interpretations. Hornfels seems to be developed in carbonate poor rocks whereas the more highly mineralized skarn is deve ........
Mining Methods
- Post Pillar Cut & Fill
- Overhand Cut & Fill
- Undefined backfill
Summary:
The EC120 project is a part of Cosalá operations. EC120 includes both El Cajón Mine and Zone 120 deposits.
In 2024 the Americas Gold and Silver plans to accelerate development into the Zone 120 and El Cajon orebodies to allow for sufficient operating faces to begin commercial production from EC120 in Q4 2024. The LOM production plan for EC120 is not materially different from that presented in the May 2019.
In late 2023 mining began in the Zone 120 deposit and approximately 25,000t were extracted, this initial production proved continuity of mineralization and confirmed silver and copper grades versus the block model. Due to the proximity of this initial production to the San Rafael deposit there were higher than expected lead and zinc grades however this is not expected to present any major challenges with the project’s future economic viability.
As of 2023, the El Cajón mine is currently on care and maintenance.
2019
The EC120 Project considers underground mining at both the El Cajón and Zone 120 deposits. These deposits are located approximately 1.5km from each other on surface and limited portions of the Mineral Resources underground, are as close as 600m.
The El Cajón underground mine is accessed by an existing decline that portals at surface near the El Cajón administration building. The Zone 120 underground mine will be accessed from the existing development at the San Rafael mine, which is accessed by an exis ........
Flow Sheet:
Summary:
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Projected Production:
Commodity | Product | Units | Avg. Annual | LOM |
Silver
|
Payable metal
|
koz
| | 12,023 |
Silver
|
Metal in concentrate
|
koz
| 2,500 | 12,524 |
Copper
|
Payable metal
|
M lbs
| | ...... |
Copper
|
Metal in concentrate
|
M lbs
| ...... | ...... |
Copper
|
Concentrate
|
kt
| | ...... |
Silver Equivalent
|
Payable metal
|
koz
| | ...... |
Operational Metrics:
Metrics | |
Ore tonnes mined, LOM
| 2,877 kt * |
Tonnes milled, LOM
| 2,877 kt * |
* According to 2019 study.
Reserves at December 31, 2023:
Mineral Reserves and Mineral Resources are estimated at a net smelter return ("NSR") cut-off value of $45/tonne.
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
2,829 kt
|
Silver
|
163 g/t
|
14,818 koz
|
Probable
|
2,829 kt
|
Copper
|
0.42 %
|
27 M lbs
|
Indicated
|
1,769 kt
|
Silver
|
117 g/t
|
6,657 koz
|
Indicated
|
1,769 kt
|
Copper
|
0.31 %
|
11.9 M lbs
|
Inferred
|
630 kt
|
Silver
|
101 g/t
|
2,050 koz
|
Inferred
|
630 kt
|
Copper
|
0.22 %
|
3.1 M lbs
|
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