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Mexico
Creston Mascota Mine (Pinos Altos)

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 Location:
222 km W from Chihuahua, Chihuahua, Mexico

  Regional Office:
Ave.Mirador #7724. Colinas del Valle
Chihuahua
Chihuahua, Mexico
31217
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageResidual leach
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2022
The Creston Mascota heap leach open pit mine operated as a satellite operation to the Pinos Altos mine from late 2010 until open pit ore was depleted during the third quarter of 2020.

Closure activities progressed on schedule and the Company continues to benefit from residual leaching production. Minor residual leaching is expected to continue under the progressive closure plan.


Owners

Source: p. 30, 235
CompanyInterestOwnership
Agnico Eagle Mines Ltd. 100 % Indirect
Agnico Eagle Mexico, S.A. de C.V. (operator) 100 % Direct
The Agnico Eagle's Pinos Altos mine, including the Creston Mascota deposit, is held through its indirect subsidiary, Agnico Eagle Mexico, S.A. de C.V.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

The Creston Mascota deposit is approximately 1,000 metres long and four to 40 metres wide, and extends from surface to more than 200 metres depth.

The host rocks at Creston-Mascota are the Frijolar Andesite and the Victoria Ignimbrite units. Generally shallowly west-dipping quartz-calcite veins and stockwork zones of mineralization associated with the Creston-Mascota deposit can be followed on the surface over a distance of 1000 metres north-south. The West Fault, first recognized during the 2008 drilling program at Creston-Mascota, is a sub-vertical, North-South striking feature against which the Creston-Mascota deposit terminates in the down-dip direction. It has been interpreted as a mainly post-mineral fault that offsets the Creston-Mascota deposit from its down-dip continuation, thought to be represented by mineralization observed at the Bravo mine/Carola prospect, located immediately southwest of Creston-Mascota. In the mineralized zone at Creston-Mascota, quartz-calcite veining is developed in the form of stockwork or as breccia (replacement and open space filling breccia sub-unit). In some locations, moderate stockwork veining, zones of silicification, and anomalous gold values also occur along the West Fault, whereas elsewhere, the West Fault consists only of nonmineralized clay gouge and breccia.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Creston Mascota mine is located approximately seven kilometres northwest of the Pinos Altos mine in northern Mexico. First mining activity commenced at the Creston Mascota deposit in 2010 and commercial production was achieved at the mine in March 2011. During 2017, the Bravo zone located south of the Creston Mascota facilities was added to the mine plan. Construction activities continued through 2018 and mining at the main Bravo zone began in the third quarter of 2018.

Creston Mascota open pit (the Bravo pit) mineral reserves were depleted in the third quarter of 2020.

Closure activitie is progressed on schedule and the Company continues to benefit from residual leaching production. Minor residual leaching is expected to continue under the progressive closure plan.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required40,18048,38447,296
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as payable metal.
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Operational Metrics:

Metrics202020192018201720162015
Tonnes processed  ......  Subscription required1,066,907 t1,422,411 t2,195,655 t2,119,245 t2,098,812 t
Daily processing rate  ......  Subscription required2,923 t3,896 t6,016 t5,790 t
Ore tonnes mined  ......  Subscription required1.1 Mt1.4 Mt2.1 Mt2 Mt
Daily ore mining rate  ......  Subscription required2,900 t3,896 t5,831 t5,520 t
Daily processing capacity  ......  Subscription required4,000 t4,000 t4,000 t4,000 t
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Reserves at December 31, 2019:
The 2019 proven and probable mineral reserve estimates set out in the table below at the Mina Bravo deposit at Creston Mascota are estimated based on a net smelter return cut-off value of the open pit ore of $12.53 per tonne. There are no mineral reserves in underground deposits.

Gold cut-off grades used for mineral resource estimates were fixed at 75% of the applicable mineral reserve cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 758 kt Gold 2.49 g/t 61 koz
Proven & Probable 758 kt Silver 63.05 g/t 1,537 koz
Measured & Indicated 988 kt Gold 0.75 g/t 24 koz
Measured & Indicated 988 kt Silver 7.88 g/t 250 koz
Inferred 281 kt Gold 1.1 g/t 10 koz
Inferred 281 kt Silver 5.05 g/t 46 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -120 / oz   -94 / oz   -72 / oz  
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 961 / oz   669 / oz   588 / oz  
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 928 / oz   651 / oz   578 / oz  
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 841 / oz†   575 / oz†   516 / oz†  
† Net of By-Product.
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Operating Costs:

Units202020192018201720162015
Total operating costs ($/t milled) USD 543327151312

Financials:

Units202120202019201820172016
Sustaining costs M USD 3.5   6.8   9.3  
Capital expenditures M USD 19.5   8.1   9.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 54.7   63.8   63  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -1.1   9.7   16.7  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 26, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Annual Report 2017
Press Release 2017
Annual Report 2016
Form 40-F 2016
Annual Report 2015
Annual Report 2014
Fact Sheet 2014
Technical Report 2008
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