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Mexico
Herradura Mine

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 Location:
81 km NW from Caborca, Sonora, Mexico

  Regional Office:
Callejón Sin Nombre No. 209 Oeste, Col. Centro
Caborca
Sonora, Mexico
83600
Phone  ...  Subscription required
Fax01-(637)-372-1935
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life11.8 years (as of Jan 1, 2021)
Herradura is one of Mexico’s largest open pit gold mines.


Owners

Source: p. 56,278
CompanyInterestOwnership
Fresnillo plc. 100 % Indirect
Minera Penmont, S. de R.L. de C.V (operator) 100 % Direct
La Herradura is operated by Penmont which is a wholly-owned subsidiary of Fresnillo.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Hydrothermal


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.


Mining Methods

  • Truck & Shovel / Loader


Summary:

La Herradura is an open pit gold mine with a heap leach pad, Merrill Crowe Plant, two pregnant solution ponds, three contingency ponds, and associated pipework.

La Herradura is developed via conventional truck and shovel method with preliminary drilling and blasting operations. Approximately 250 Cat haulage trucks are utilized for the haulage ore and waste.

In 2019 Fresnillo began rolling out dual fuel systems into our haulage fleet. This programme involved the installation of engines which are able to automatically switch between powering the trucks by diesel and by Liquefied Natural Gas (LNG), depending on the terrain. By the end of 2021, the entire 785 and 793 haulage fleet had been converted.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2021202020192018201720162015
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required474,168473,638520,366398,866
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required124,486 kt124,024 kt130,025 kt118,841 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required22,926 kt22,157 kt26,027 kt25,159 kt
Tonnes processed  ......  Subscription required  ......  Subscription required22,926,542 t22,156,792 t26,027,466 t25,158,600 t
Subscription required - Subscription is required.

Reserves at May 31, 2021:
Ore Reserves that are attributed to the heap leach are reported at cut-off grades of 0.21 g/t Au for oxide ore and 0.22 g/t Au for transition and sulphide ore. Oxide material above 0.83 g/t Au and transitional and sulfide material above 0.44 g/t Au are attributed to the mill.

Mineral Resources are reported at various cut-offs dependent on material types and grade. Oxide material above 0.20 g/t Au and below 0.72 g/t Au reports to the heap leach; transitional and sulfide material above 0.20 g/t and below 0.40 g/t Au reports to the heap leach; oxide material above 0.72 g/t Au reports to the mill; transitional and sulfide material above 0.40 g/t Au reports to the mill.

CategoryTonnage CommodityGradeContained Metal
Proven 216,616 kt Gold 0.74 g/t 5,127 koz
Probable 23,985 kt Gold 0.66 g/t 511 koz
Proven & Probable 240,601 kt Gold 0.73 g/t 5,638 koz
Measured 272,932 kt Gold 0.73 g/t 6,375 koz
Indicated 45,253 kt Gold 0.7 g/t 1,021 koz
Measured & Indicated 318,185 kt Gold 0.72 g/t 7,396 koz
Inferred 10,529 kt Gold 0.59 g/t 201 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 504 / oz†   492.9 / oz†   470.72 / oz†  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 806.73 / oz†   807.66 / oz†   731.69 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 21.718.318.113.287.78.7

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 116   153.2   78.8  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 608.2   606.8   656.1  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 323   355.6   369.9  
EBITDA M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of March 23, 2022:
HME TypeModelQuantity
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Other 2018
Annual Report 2017
Annual Report 2016
Annual Report 2015
Corporate Presentation 2015
Annual Report 2014
Other 2014
Year-end Mineral Reserves 2014
Other 2009
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