Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
| Mine Life | 2029 |
The San Andres Mine is an open pit, heap-leach operation. Mining at San Andres is by conventional open pit methods. Gold is recovered through the ADR plant. |
Source:
p. 37
| Company | Interest | Ownership |
|
Aura Minerals Inc.
|
100 %
|
Indirect
|
|
Minerales de Occidente, S.A. de C.V
(operator)
|
100 %
|
Direct
|
The Mine’s surface and mineral rights are owned by Minerales de Occidente, S.A. de C.V. (“Minosa”), a wholly-owned indirect subsidiary of Aura existing under the laws of Honduras.
Contractors
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Deposit Type
- Vein / narrow vein
- Epithermal
Summary:
The gold deposits at the Mine are hosted within Tertiary-aged felsic volcanic flows, tuffs and agglomerates, thick inter-bedded silica breccias, primarily containing volcanic fragments and tuffaceous sandstones. These volcanic units occur on the south (hanging wall side) of the San Andres Fault. The fault strikes west-east and dips at 60° to 70° south and it marks the northern boundary of the Water Tank Hill and East Ledge pits. The fault forms the contact between the Permian phyllites (metasediments) to the north and the volcanic units on the south. Mineralisation within the phyllites is limited to the Buffa Zone where quartz carbonate veining proximal to the San Andres Fault. South of the Mine area, where there is no alteration, the volcanic and sedimentary rocks have a distinctive hematite brick red color but, in the Mine area, they have been bleached to light buff yellow and grey colors due to alteration. The younger volcanic and sedimentary units typically have a shallow to moderate southerly dip and thicken to the south of the Mine area.
Structurally, the Mine area is transected by a series of sub-parallel, west to northeast-striking faults that are typically steeply dipping to the south and by numerous north and northwest-striking normal faults and extension fractures. The most prominent fault of the 35 first set is the San Andres Fault. The San Andres Fault is parallel to, and coeval with, a major set of west to north-northeast trending strike-slip faults t ........
Summary:
Mining at San Andrés is by conventional open pit methods. Historical production rates for the years 2009 to 2013 averaged approximately 13,000 t of ore and 10,000 t of waste produced daily with generally continuous mining 24 hours a day for 360 days per year.
The San Andrés Mine is anticipating a material expansion in ore throughput from approximately 5Mtpa to 7Mtpa. This expansion was justified by the improved incremental economics with modest capital investment.
Mine production utilizes conventional drill and blasting methods with excavation on 6m high benches.
Source:
Source:
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Flow Sheet:
Summary:
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Production:
| Commodity | Units | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Gold Equivalent
|
koz
| ...... ^ | | | | | | |
|
Gold
|
oz
| | ...... | ...... | ...... | ...... | ...... | ...... |
All production numbers are expressed as metal in doré.
^ Guidance / Forecast.
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Operational Metrics:
| Metrics | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Daily processing capacity
| ...... | ...... | 20,000 t | 20,000 t | 20,000 t | 20,000 t |
|
Stripping / waste ratio
| ...... | ...... | 0.66 | 0.73 | 0.68 | 0.74 |
|
Ore tonnes mined
| ...... | ...... | 4,114,347 t | 5,178,049 t | 6,042,075 t | 6,693,329 t |
|
Waste
| ...... | ...... | 2,698,169 t | 3,766,406 t | 4,109,579 t | 4,983,524 t |
|
Total tonnes mined
| ...... | ...... | 6,812,515 t | 8,944,455 t | 10,151,653 t | 11,676,853 t |
|
Tonnes processed
| ...... | ...... | 4,005,297 t | 5,172,718 t | 6,065,192 t | 6,699,350 t |
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Reserves at December 31, 2022:
Mineral Reserves have been estimated at a cut-off grade of 0.23 g/t for oxide material and 0.30 g/t for mixed material, with dilution of 5% and mining recovery of 95%.
The Mineral Resource cut-off grade used was 0.20 g/t for oxide material and 0.27 g/t for mixed material.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
12,676 kt
|
Gold
|
0.46 g/t
|
189 koz
|
|
Probable
|
32,192 kt
|
Gold
|
0.48 g/t
|
492 koz
|
|
Proven & Probable
|
44,868 kt
|
Gold
|
0.47 g/t
|
681 koz
|
|
Measured
|
16,886 kt
|
Gold
|
0.49 g/t
|
263 koz
|
|
Indicated
|
54,975 kt
|
Gold
|
0.49 g/t
|
863 koz
|
|
Measured & Indicated
|
72,487 kt
|
Gold
|
0.49 g/t
|
1,134 koz
|
|
Inferred
|
5,871 kt
|
Gold
|
0.73 g/t
|
138 koz
|
Source:
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Corporate Filings & Presentations:
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