Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
|
| Processing |
- Flotation
- Leaching plant / circuit
|
| Mine Life | 3.4 years (as of Jan 1, 2020) |
Source:
p. 62,256
Deposit Type
- Epithermal
- Vein / narrow vein
Summary:
The La Ciénega gold-silver veins are low-sulfidation, epithermal-type deposits related to a rhyolitic flow-dome complex. Ore deposits in the La Ciénega district consist of a series of subparallel, northwest– southeast-trending veins which are hosted in andesitic and rhyolitic rocks that belong to the Tertiary-age Upper and Lower Volcanic sequences. The veins are vertical to steeply dipping structures which consist of quartz, generally containing gold-silver and less than 10 percent combined lead, zinc, and copper sul-fide, and sulfosalt minerals. Supergene enrichment is present in the upper parts of the known ore shoots.
Summary:
Ciénega is a gold-silver mine located near the small community of Nuestra Señora de la Ciénega. Long-hole drilling mining method is utilized at Ciénega.
Production:
| Commodity | Product | Units | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 |
|
Gold
|
Metal
|
oz
| ......  | ...... | 66,869 | 71,947 | 72,851 | 85,662 | 108,211 |
|
Silver
|
Metal
|
oz
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
|
Zinc
|
Metal
|
t
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
|
Zinc
|
Concentrate
|
kt
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
|
Lead
|
Metal
|
t
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
|
Lead
|
Concentrate
|
kt
| ...... | ...... | ...... | ...... | ...... | ...... | ...... |
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Operational Metrics:
| Metrics | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2013 |
|
Tonnes milled
| ...... | 1,329 kt | 1,324 kt | 1,302 kt | 1,275 kt | 1,329 kt | 1,242 kt |
|
Daily milling capacity
| ...... | 4 kt | 4 kt | 4 kt | 4 kt | 4 kt | |
|
Annual milling capacity
| ...... | 1,340 kt | 1,340 kt | 1,340 kt | 1,340 kt | 1,340 kt | |
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Reserves at December 31, 2020:
The cut-off grades for the Ciénega reserve vary between 186 and 411 g/t AgEq.
The cut-off grade for Ciénega’s mineral resources varies between 181 and 288 g/t AgEq.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Probable
|
4,523 kt
|
Gold
|
2.36 g/t
|
343 koz
|
|
Probable
|
4,523 kt
|
Silver
|
232 g/t
|
33,710 koz
|
|
Probable
|
4,523 kt
|
Zinc
|
1.65 %
|
75 kt
|
|
Probable
|
4,523 kt
|
Lead
|
1.11 %
|
50 kt
|
|
Measured
|
4,482 kt
|
Gold
|
4.7 g/t
|
678 koz
|
|
Measured
|
4,482 kt
|
Silver
|
198 g/t
|
28,481 koz
|
|
Measured
|
4,482 kt
|
Zinc
|
2.01 %
|
90 kt
|
|
Measured
|
4,482 kt
|
Lead
|
1.4 %
|
63 kt
|
|
Indicated
|
6,047 kt
|
Gold
|
2.31 g/t
|
448 koz
|
|
Indicated
|
6,047 kt
|
Silver
|
228 g/t
|
44,346 koz
|
|
Indicated
|
6,047 kt
|
Zinc
|
1.75 %
|
106 kt
|
|
Indicated
|
6,047 kt
|
Lead
|
1.11 %
|
67 kt
|
|
Measured & Indicated
|
10,529 kt
|
Gold
|
3.33 g/t
|
1,126 koz
|
|
Measured & Indicated
|
10,529 kt
|
Silver
|
215 g/t
|
72,828 koz
|
|
Measured & Indicated
|
10,529 kt
|
Zinc
|
1.86 %
|
196 kt
|
|
Measured & Indicated
|
10,529 kt
|
Lead
|
1.23 %
|
129 kt
|
|
Inferred
|
11,872 kt
|
Gold
|
1.68 g/t
|
640 koz
|
|
Inferred
|
11,872 kt
|
Silver
|
206 g/t
|
78,805 koz
|
|
Inferred
|
11,872 kt
|
Zinc
|
1.07 %
|
128 kt
|
|
Inferred
|
11,872 kt
|
Lead
|
0.65 %
|
77 kt
|
Corporate Filings & Presentations:
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Aerial view:
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