Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ...  |
Mine Life | 1.5 years (as of Jan 1, 2021) |
Source:
p. 278
Noche Buena is operated by Minera Penmont S. de R.L. de C.V (Minera Penmont) as a subsidiary of Fresnillo Plc (Fresnillo). Fresnillo is the 100 percent owner.
Contractors
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Deposit Type
- Vein / narrow vein
- Hydrothermal
Summary:
Noche Buena is located in the Herradura district, 23 kilometres from the Herradura mine.
Gold rich veins are restricted to the Proterozoic rocks which consist of biotite-feldspar-quartz and quartz-feldspar gneisses of sedimentary and plutonic origin. The hydrothermal system is structurally controlled and the higher grade mineralization occurs in quartz-sulfide veins filling tensional fractures. Quartz-sericite-albite alteration is widespread in the core of the deposit and grades to propylitic in the outer parts where the gneisses are more biotite rich.
Summary:
Noche Buena is an open pit gold mine which developed by conventional truck and shovel method with preliminary drilling and blasting operations. DM 45 Drilling machines are utilized for drilling blast holes, Cat 992 wheel loaders and Cat 390 Excavators for loading ore and waste to Cat 777 and Cat 775 haulage trucks.
Flow Sheet:
Summary:

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Production:
Commodity | Units | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
Gold
|
oz
| ......  | ......  | ......  | 167,208 | 172,282 | 182,280 |
Silver
|
oz
| ......  | ......  | ......  | ......  | ......  | ......  |
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Operational Metrics:
Metrics | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
Total tonnes mined
| ......  | ......  | 48,621 kt | 80,305 kt | 85,233 kt | 81,423 kt |
Ore tonnes mined
| ......  | ......  | 12,167 kt | 18,196 kt | 17,821 kt | 17,432 kt |
Tonnes processed
| ......  | ......  | 12,166,900 t | 18,195,744 t | 17,820,817 t | 17,431,718 t |
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Reserves at May 31, 2021:
Mineral reserve cut-off grade is 0.2 g/t Au.
Mineral resource cut-off grade is 0.2 g/t Au.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
13,647 kt
|
Gold
|
0.49 g/t
|
214 koz
|
Probable
|
80 kt
|
Gold
|
0.54 g/t
|
1 koz
|
Proven & Probable
|
13,727 kt
|
Gold
|
0.49 g/t
|
216 koz
|
Measured
|
18,125 kt
|
Gold
|
0.49 g/t
|
284 koz
|
Indicated
|
2,404 kt
|
Gold
|
0.6 g/t
|
46 koz
|
Measured & Indicated
|
20,529 kt
|
Gold
|
0.5 g/t
|
331 koz
|
Inferred
|
1,678 kt
|
Gold
|
0.74 g/t
|
40 koz
|
Corporate Filings & Presentations:
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