Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
- ROM/dump leach
- Merrill–Crowe
- Cyanide (reagent)
|
| Mine Life | 1.9 years (as of Jan 1, 2019) |
Source:
p. 4
Noche Buena is operated by Minera Penmont S de R.L. de C.V. (Penmont) as a subsidiary of Fresnillo plc. Fresnillo is the 100 percent owner.
Summary:
Noche Buena is an open pit mine.
Processing Technologies
- ROM/dump leach
- Merrill–Crowe
- Cyanide (reagent)
Source:
Summary:
Facilities consist of waste rock stockpiles, a heap leach pad, process ponds, a Merrill-Crowe plant, and various support facilities. Run-of-mine ore is placed on the heap leach pad for leaching via drip emitters after adding lime to each truckload. There are four ponds: pregnant pond, intermediate pond, and two contingency ponds.
Noche Buena receives solid cyanide via isotankers with flobins stored in a warehouse as a backup supply. There is an offload facility for the isotankers as well as an adjacent flobin mixing facility. Five tanks are used for receiving, mixing, and distributing the reagent-grade cyanide: dissolution (for isotankers), dilution, preparation (for flobins), storage, and dosification.
The Merrill-Crowe plant consists of a clarification cone, clarifiers, deoxygenation towers, a zinc cone, filter presses, and a sedimentation pond (for clarifier wash water). A refinery is also located onsite.
Recoveries & Grades:
| Commodity | Parameter | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|
Gold
|
Head Grade, g/t
| 0.52 | 0.52 | 0.51 | 0.5 | 0.51 | 0.54 | 0.51 |
|
Silver
|
Head Grade, g/t
| 0.1 | 0.1 | 0.1 | 0.2 | 0.4 | 0.2 | 0.4 |
Production:
| Commodity | Units | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|
Gold
|
oz
| ...... | 172,282 | 182,280 | 158,179 | 129,242 | 108,729 | 65,518 |
|
Silver
|
oz
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
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Operational Metrics:
| Metrics | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|
Total tonnes mined
| ...... | ...... | 81,423 kt | 82,373 kt | 92,593 kt | | |
|
Ore tonnes mined
| ...... | ...... | 17,432 kt | 17,400 kt | 15,607 kt | | |
|
Tonnes processed
| ...... | ...... | 17,431,718 t | 17,399,931 t | 15,607,230 t | 12,283,709 t | 8,447,301 t |
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Reserves at December 31, 2018:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
22,651 kt
|
Gold
|
0.53 g/t
|
389 koz
|
|
Probable
|
11,262 kt
|
Gold
|
0.52 g/t
|
188 koz
|
|
Proven & Probable
|
33,914 kt
|
Gold
|
0.53 g/t
|
577 koz
|
|
Measured
|
22,651 kt
|
Gold
|
0.53 g/t
|
389 koz
|
|
Indicated
|
11,262 kt
|
Gold
|
0.52 g/t
|
188 koz
|
|
Measured & Indicated
|
33,914 kt
|
Gold
|
0.53 g/t
|
577 koz
|
|
Inferred
|
886 kt
|
Gold
|
0.52 g/t
|
15 koz
|
Corporate Filings & Presentations:
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