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Mexico
El Castillo Mine (El Castillo Complex)

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 Location:
8 km W from José María Patoni, Durango, Mexico
  Address:
Carr. San Juan Coneto de Comonfort Km. 12
San Juan del Río
Durango, Mexico
34480
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageResidual leach
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2023
Mining operations at El Castillo were suspended in December 2022 and the mine is now transitioning into a reclamation phase.

An Asset Retirement Obligation ("ARO") was prepared by Argonaut in January 2023 to define the closure liabilities associated with the El Castillo Mine. The ARO includes descriptions of the closure and reclamation approaches, unit areas, and general unit rates. The total costs for closure and reclamation of the site (including a 10% contingency) were estimated at US $10,881,216.

Owners

Source: p. 40
CompanyInterestOwnership
Argonaut Gold Inc. 100 % Indirect
Minera Real del Oro S.A. de C.V. (operator) 100 % Direct
The El Castillo mine is owned and operated by Minera Real del Oro, S.A. de C.V., which is a subsidiary of Argonaut Gold Inc.

Contractors

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Deposit Type

  • Porphyry
  • Intrusion related
  • Epithermal

Summary:

Deposit Type
El Castillo is interpreted to be a porphyry-style gold system related to Eocene granodiorite– diorite porphyries that intrude Cretaceous clastic and carbonate sediments in an extensional tectonic setting. Gold mineralization occurs throughout the magmatic-hydrothermal system in space and time and is related to sulphide mineralization spatially associated with early potassic development and genetically related to an overprint of phyllic alteration. Supergene alteration, formed as a product of acid leaching, has resulted in argillic-quartz alteration assemblages within the oxide zone of the deposit. The main gold event is believed to be associated with magmatic hydrothermal fluids corresponding to phyllic alteration.

The El Castillo gold system is similar to that found at Andacollo, Chile (Reyes, 1991 and Oyarzun, et al., 1996). Andacollo is a Cretaceous diorite to granodiorite porphyry copper-gold system with central porphyry copper-gold mineralization related to a classic porphyry alteration assemblage and a distal sediment-hosted (manto) low sulphidation and epithermal-level gold satellite system. Fluid inclusion work by Oyarzun et al. (1996) indicates that the manto epithermal gold deposits may in fact be related to another intrusive that has not been recognized at the surface due to high temperature fluid inclusions (about 365ºC) that are found about 5 km from the porphyry centre.

Supergene oxidation of shallow (<200 m) pyrite-gold m ........

Mining Methods

  • Truck & Shovel / Loader

Summary:

In the fourth quarter of 2022, the El Castillo mine ceased mining operations and is now in residual leaching.

Crushing and Grinding

Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold Equivalent koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required4860
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Stripping / waste ratio  ......  Subscription required  ......  Subscription required1.11 1.49 1.4 1.28
Ore tonnes mined  ......  Subscription required  ......  Subscription required8,608 kt8,914 kt8,801 kt8,140 kt
Waste  ......  Subscription required  ......  Subscription required9,531 kt13,293 kt12,303 kt10,407 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required18,139 kt22,207 kt21,104 kt18,547 kt
Tonnes processed  ......  Subscription required  ......  Subscription required8,760 kt8,867 kt8,840 kt8,164 kt
Daily mining rate  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Indicated 23.5 Mt Gold 0.31 g/t 232 koz
Inferred 2.5 Mt Gold 0.33 g/t 26 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,016 / oz†   918 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units2022
OP mining costs ($/t milled) USD 4.58  
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
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Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 16.7   35.3  
Sustaining costs M USD  ......  Subscription required
Revenue M USD
Operating Income M USD
Gross profit M USD
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Water Supply
Source: Subscription required

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Heavy Mobile Equipment as of October 1, 2021:
HME TypeModelSizeQuantity
Drill ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Truck (haul) 100 t ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 23, 2023
....................... Subscription required ....................... Subscription required Subscription required May 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 5, 2023
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Annual Information Form 2022
Annual Report 2022
Corporate Presentation 2022
Financial Review 2022
Management Discussion & Analysis 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Press Release 2017
Press Release 2017
Annual Information Form 2016
Financial Review 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Financial Review 2015
Management Discussion & Analysis 2015
Annual Information Form 2014
Financial Review 2014
Management Discussion & Analysis 2013
Technical Report 2011
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