Overview
| Status | Care and Maintenance |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
|
| Processing |
|
| Mine Life | 12 years (as of Jan 1, 2013) |
On 13 February 2019, Hochschild announced the decision to place the mine on care and maintenance due to the volatile silver price and current geological conditions. |
Source:
p. 27, 100
| Company | Interest | Ownership |
|
Hochschild Mining Plc.
|
100 %
|
Indirect
|
|
Compañía Minera Arcata S.A.
(operator)
|
100 %
|
Direct
|
Hochschild Mining Plc. indirectly owns 100% interest in the Arcata mine through it's wholly owned subsidiary Compañía Minera Arcata S.A.
Deposit Type
- Epithermal
- Vein / narrow vein
Summary:
The Arcata mine is conformed by vein systems where the epithermal vein deposits are of an intermediate sulphidation type with predominant silver values and variable quantities of gold and base metals. The main structures at Arcata are Mariana NE, Blanca, Amparo, Ramal Leslie, Alexia and Marion. The known structures at Arcata extend over 29 kilometres.
Summary:
The veins are mined by conventional and mechanised (trackless) cut-and-fill breast or overhand stoping methods utilising timber support.
Source:
Summary:
The plant at Arcata currently produces silver/gold bulk concentrate by flotation. Concentrate from the plant at Arcata is transported to the Ares plant, approximately 50 kilometres away, where it is processed into dore.
Recoveries & Grades:
| Commodity | Parameter | 2018 | 2017 | 2016 | 2015 | 2014 |
|
Silver
|
Head Grade, g/t
| 321 | 308 | 337 | 323 | 286 |
|
Gold
|
Head Grade, g/t
| 0.99 | 1.07 | 1.24 | 0.99 | 0.85 |
Reserves at December 31, 2018:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
834,000 t
|
Silver
|
438 g/t
|
11.7 M oz
|
|
Measured
|
834,000 t
|
Gold
|
1.35 g/t
|
36.1 koz
|
|
Measured
|
834,000 t
|
Silver Equivalent
|
547 g/t
|
14.7 M oz
|
|
Indicated
|
1,304,000 t
|
Silver
|
411 g/t
|
17.2 M oz
|
|
Indicated
|
1,304,000 t
|
Gold
|
1.36 g/t
|
56.9 koz
|
|
Indicated
|
1,304,000 t
|
Silver Equivalent
|
521 g/t
|
21.8 M oz
|
|
Measured & Indicated
|
2,138,000 t
|
Silver
|
421 g/t
|
29 M oz
|
|
Measured & Indicated
|
2,138,000 t
|
Gold
|
1.35 g/t
|
93 koz
|
|
Measured & Indicated
|
2,138,000 t
|
Silver Equivalent
|
531 g/t
|
36.5 M oz
|
|
Inferred
|
3,533,000 t
|
Silver
|
371 g/t
|
42.1 M oz
|
|
Inferred
|
3,533,000 t
|
Gold
|
1.26 g/t
|
142.6 koz
|
|
Inferred
|
3,533,000 t
|
Silver Equivalent
|
472 g/t
|
53.6 M oz
|
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