Overview
| Stage | Permitting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 5 years (as of Jan 1, 2018) |
The La Fortuna open pit gold project has a robust and positive preliminary economic assessment (PEA) completed and the main Federal permits in hand.
As of June 30, 2023, the La Fortuna project is in development and it is awaiting a construction decision, if deemed appropriate by management. Development of the La Fortuna project would follow only if additional favorable results, regulatory approval, and financing are obtained. |
Source:
p. 11
On May 4, 2016, the Company announced the completion of the acquisition, by its subsidiary Minera Alamos de Sonora S.A. de C.V., of 100% of the mineral claims known as the “La Fortuna” gold project.
Contractors
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Deposit Type
- Intrusion related
- Breccia pipe / Stockwork
- Porphyry
- Epithermal
Summary:
Deposit Types
Known mineralization within the La Fortuna Project area is spatially associated with calc-alkaline intrusions, with different zones exhibiting a combination of geological characteristics and gold-silver grades of both porphyry and epithermal mineralization styles. Collectively the zones at La Fortuna may be best characterized as intrusion- related ‘transitional’ deposits. They consist mainly of a hydrothermally altered breccia “pipe”, tabular in shape, similar in nature to other quartz-sulphide gold ± copper ± silver epithermal breccia deposits.
Mineralization
The Project area hosts numerous historic adits, and gold-silver showings including the historic La Fortuna Mine (and extensions) and the Ramada, PN, and Cerro Pelon zones to name a few.
Mineralization in the La Fortuna Mine area appears to be spatially associated with a series of parallel fault structures (approximately 1.5–2 km apart) and related to tourmalinized quartz monzonite breccia bodies which are located along the periphery or flanks of a north-northwest striking, west dipping, tabular quartz monzonite intrusive that appears to be approximately 60 m wide and forms a prominent topographic ridge prominent in the mine area. These fault structures and tourmaline breccia bodies have been the source of significant historical mining activity within the Project area.
La Fortuna Mine
The La Fortuna deposit is hosted within a tabular mineralized body that i ........
Summary:
Mineralization at La Fortuna extends close to surface and is amenable to conventional open pit methods utilizing front-end loaders and trucks. Pit bench heights are assumed to be 5 m in order to provide good ore/waste selectivity, although the use of larger bench heights in zones consisting predominantly of waste should be considered as part of future optimization studies.
Overall average pit slopes with the benches/ramps in place are approximately 43° for three sides and 41° overall for the north wall. Rock competency is reasonable and higher pit slopes may be considered once the appropriate geotechnical information is available.
Mineralized and waste material will be hauled using 25-t trucks approximately 500 m (maximum) to the mineralized stockpile and waste dump locations near the mine. Crushed stockpile material is then transported to the plant processing facilities located at a distance of less than 1.5 km from the mine.
Mining Equipment
Minera Alamos will employ a mining contractor; the contractor will select the final equipment. Dump trucks in the 25-t range will be loaded with two front-end loaders in the 5–6 m3 range.
Drill and Blast
Standard drill and blast techniques will be used. Blast holes will have a diameter in the 90 mm to 100 mm range.
Load and Haul
Ore will be hauled to the feeder at the processing plant and waste rock to piles adjacent to the pit. In both cases, the haulage di ........
Source:
- subscription is required.
Flow Sheet:
Summary:
- subscription is required.
Projected Production:
| Commodity | Product | Units | Avg. Annual | LOM |
|
Gold
|
Concentrate
|
kt
| | 0.7 |
|
Gold
|
Metal in concentrate
|
koz
| 43 | 213 |
|
Silver
|
Metal in concentrate
|
oz
| ...... | ...... |
|
Copper
|
Metal in concentrate
|
t
| ...... | ...... |
|
Copper
|
Concentrate
|
kt
| | ...... |
|
Gold Equivalent
|
Metal in concentrate
|
oz
| ...... | |
Operational Metrics:
| Metrics | |
|
Daily processing rate
| 1,100 t * |
|
Tonnes milled
| 1,998,356 t * |
|
Waste tonnes, LOM
| 12,863,948 t * |
|
Ore tonnes mined, LOM
| 2,867,303 t * |
|
Total tonnes mined, LOM
| 15,731,200 t * |
* According to 2018 study.
Reserves at December 20, 2018:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
1,755,375 t
|
Gold
|
2.96 g/t
|
167,000 oz
|
|
Measured
|
1,755,375 t
|
Silver
|
17.5 g/t
|
987,800 oz
|
|
Measured
|
1,755,375 t
|
Copper
|
0.23 %
|
4,000 t
|
|
Indicated
|
1,714,336 t
|
Gold
|
2.59 g/t
|
142,800 oz
|
|
Indicated
|
1,714,336 t
|
Silver
|
15.5 g/t
|
854,400 oz
|
|
Indicated
|
1,714,336 t
|
Copper
|
0.21 %
|
3,600 t
|
|
Measured & Indicated
|
3,469,711 t
|
Gold
|
2.78 g/t
|
309,800 oz
|
|
Measured & Indicated
|
3,469,711 t
|
Silver
|
16.51 g/t
|
1,842,200 oz
|
|
Measured & Indicated
|
3,469,711 t
|
Copper
|
0.22 %
|
7,600 t
|
|
Inferred
|
156,322 t
|
Gold
|
1.72 g/t
|
8,600 oz
|
|
Inferred
|
156,322 t
|
Silver
|
8.51 g/t
|
42,700 oz
|
|
Inferred
|
156,322 t
|
Copper
|
0.09 %
|
100 t
|
Source:
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Corporate Filings & Presentations:
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