Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
- Heap leach
- Leaching plant
- Merrill–Crowe
- Cyanide (reagent)
|
| Mine Life | 12 years (as of Jan 1, 2017) |
Herradura is one of Mexico’s largest open pit gold mines. |
Deposit Type
- Vein / narrow vein
- Orogenic
Summary:
La Herradura deposit is located in the Sonora state in northwestern Mexico, approximately 80 km northwest of the town of Caborca.
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.
Processing Technologies
- Heap leach
- Leaching plant
- Merrill–Crowe
- Cyanide (reagent)
Summary:
Herradura is open pit mine, heap leach and Merrill Crowe plants; dynamic leaching plant (DLP).
Recoveries & Grades:
| Commodity | Parameter | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|
Gold
|
Head Grade, g/t
| 0.68 | 0.71 | 0.73 | 0.72 | 0.61 | 0.57 |
|
Silver
|
Head Grade, g/t
| ......  | ...... | ...... | ...... | ...... | ...... |
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Production:
| Commodity | Units | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|
Gold
|
oz
| ...... | ...... | 398,866 | 265,564 | 264,562 | 314,547 |
|
Silver
|
oz
| ...... | ...... | ...... | ...... | ...... | ...... |
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Operational Metrics:
| Metrics | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 |
|
Total tonnes mined
| ...... | 118,841 kt | 117,033 kt | 129,797 kt | | | |
|
Ore tonnes mined
| ...... | 25,159 kt | 22,875 kt | 22,305 kt | | | |
|
Tonnes processed
| ...... | 25,158,600 t of ore | 22,875,421 t of ore | 22,305,133 t of ore | 14,363,315 t of ore | 24,641,053 t of ore | 21,020,356 t of ore |
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Reserves at December 31, 2017:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
179,608 kt
|
Gold
|
0.8 g/t
|
4,616 koz
|
|
Probable
|
126,022 kt
|
Gold
|
0.77 g/t
|
3,117 koz
|
|
Proven & Probable
|
305,630 kt
|
Gold
|
0.79 g/t
|
7,733 koz
|
|
Measured
|
216,458 kt
|
Gold
|
0.8 g/t
|
5,567 koz
|
|
Indicated
|
163,586 kt
|
Gold
|
0.79 g/t
|
4,129 koz
|
|
Measured & Indicated
|
380,044 kt
|
Gold
|
0.79 g/t
|
9,695 koz
|
|
Inferred
|
20,115 kt
|
Gold
|
0.97 g/t
|
629 koz
|
Commodity Production Costs:
| | Commodity | Units | 2017 | 2016 | 2015 | 2014 |
|
Cash costs
|
Gold
|
USD
|
......  †
|
...... †
|
473 / oz†
|
465 / oz†
|
|
All-in sustaining costs (AISC)
|
Gold
|
USD
|
...... †
|
...... †
|
888 / oz†
|
862 / oz†
|
† Net of By-Product.
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Operating Costs:
| | Units | 2017 | 2016 | 2015 | 2014 | 2013 |
|
OP mining costs ($/t milled)
|
USD
| 8 | 7.7 | 8.7 | 9.3 | 8.4 |
Financials:
| | Units | 2017 | 2016 | 2015 | 2014 |
|
Capital expenditures
|
M USD
| ......  | ...... |
119.7
|
63.1
|
|
Revenue
|
M USD
| ...... | ...... |
445.1
|
342.7
|
|
Gross profit
|
M USD
| ...... | ...... |
163.3
|
136.2
|
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Corporate Filings & Presentations:
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