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Argentina
Alumbrera Mine (Minera Agua Rica Alumbrera (MARA) Project)

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 Location:
NE 55 from Belen, Argentina

  Address:
4751 Distrito de Hualfín
Belén
Argentina
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeOpen Pit
Commodities
  • Gold
  • Copper
  • Molybdenum
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Open pit mining completed in Q3 2018. The Alumbrera mine is currently not operating as a production mine as of December 31, 2019.

On December 17, 2020, the integration of the Agua Rica Project with the Alumbrera Mine and Alumbrera plant and infrastructure (the “MARA Project”) was completed and the parties (Newmont, Glencore, and Yamana) entered into a Joint Venture Agreement ("MARA JV Agreement") under which all parties fully contributed their ownership interest in Agua Rica and Alumbrera in exchange for ownership interest in MARA.

Yamana is the operator of the joint venture and it will continue to oversee engagement with local, provincial and national stakeholders, completion of the feasibility study and environmental impact assessment for the MARA project, and generally lead the project to development and operation.

The parties now are advancing a Feasibility Study and Environmental Impact Assessment (“EIA”), both expected to be completed by 2022.


Owners

Source: p. 6,8
CompanyInterestOwnership
Newmont Corp. 18.75 % Indirect
Glencore plc. 25 % Indirect
Yamana Gold Inc. (operator) 56.25 % Indirect
In March 2019, Newmont, Glencore, and Yamana entered into an Integration Agreement to combine the Agua Rica project, wholly owned by Yamana, with Alumbrera to form a new entity, Minera Agua Rica Alumbrera Limited ("MARA"). On December 17, 2020, the Integration Agreement was executed and the parties entered into a Joint Venture Agreement ("MARA JV Agreement") under which all parties fully contributed their ownership interest in Agua Rica and Alumbrera in exchange for ownership interest in MARA.

Yamana holds a controlling ownership interest in the MARA Project at 56.25%. Glencore holds a 25.00% interest and Newmont holds an 18.75% interest. Yamana is the operator of the joint venture.

Contractors

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Deposit Type

  • Porphyry


Summary:

The Bajo de la Alumbrera porphyry Cu-Au deposit, Argentina, is in the eastern Andes, near the north edge of a region of reverse fault-bound basement uplifts that overlie a low-angle segment of the subduction zone.

The deposit is centered on a closely spaced cluster of small felsic porphyry stocks and dikes, emplaced into andesites during seven phases of intrusion. Dikes of several phases define a radial pattern. Most of the porphyries are very similar to one another, with phenocrysts of plagioclase, hornblende, biotite, and quartz, in a matrix of fine grained quartz, K-feldspar, and minor plagioclase, biotite, and magnetite. Individual porphyries are distinguished mainly on the basis of intrusive contact relationships.

Highest Cu-Au grades are associated with abundant quartz veins, secondary K-feldspar, ±magnetite, ±biotite, ±anhydrite, in the earliest porphyry (P2), and adjacent andesite. P2-related mineralization is truncated by porphyries of the second phase of ore-related intrusions (Early P3 and Quartz-eye porphyry), which contain similar but generally less intense mineralization and alteration. Porphyries of the next phase (Late P3) truncate mineralization associated with earlier phases and are weakly mineralized with Cu-Au, sparse quartz veins, and secondary biotite. The still later Northwest porphyries truncate most Cu-Au, quartz veins, and potassic alteration, and themselves contain only traces of such mineralization and partially biotitized h ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Open pit mining completed in Q3 2018.

Standard truck and shovel mining techniques operations are employed in the open pit mine, utilizing 42 cubic metre shovels and 220 tonne haul trucks to move both ore and waste. Mining is carried out on 17-metre benches, with 2-metre sub-drill, which suit the size of the equipment necessary for the production rate.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits20182017201620152014
Gold Metal in conc./ doré koz 120188256196317
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in conc./ doré koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Operational Metrics:

Metrics20162015
Ore tonnes mined 33,512 kt37,939 kt
Waste 25,275 kt45,651 kt
Tonnes milled 34,664 kt33,069 kt
Stripping / waste ratio 0.8 1.2

Reserves at December 31, 2019:

CategoryOreTypeTonnage CommodityGrade
Proven In-Situ (UG) 67 Mt Gold 0.39 g/t
Proven In-Situ (UG) 67 Mt Copper 0.4 %
Proven In-Situ (UG) 67 Mt Molybdenum 0.013 %
Probable In-Situ (UG) 2 Mt Gold 0.38 g/t
Probable In-Situ (UG) 2 Mt Copper 0.38 %
Probable In-Situ (UG) 2 Mt Molybdenum 0.014 %
Proven & Probable In-Situ (UG) 69 Mt Gold 0.39 g/t
Proven & Probable In-Situ (UG) 69 Mt Copper 0.4 %
Proven & Probable In-Situ (UG) 69 Mt Molybdenum 0.013 %
Measured In-Situ (OP) 5 Mt Gold 0.77 g/t
Measured In-Situ (UG) 117 Mt Gold 0.35 g/t
Measured Total 122 Mt Gold 0.37 g/t
Measured In-Situ (OP) 5 Mt Copper 0.22 %
Measured In-Situ (UG) 117 Mt Copper 0.38 %
Measured Total 122 Mt Copper 0.37 %
Measured In-Situ (UG) 117 Mt Molybdenum 0.014 %
Indicated In-Situ (OP) 12 Mt Gold 0.61 g/t
Indicated In-Situ (UG) 6 Mt Gold 0.32 g/t
Indicated Total 18 Mt Gold 0.51 g/t
Indicated In-Situ (OP) 12 Mt Copper 0.2 %
Indicated In-Situ (UG) 6 Mt Copper 0.35 %
Indicated Total 18 Mt Copper 0.25 %
Indicated In-Situ (UG) 6 Mt Molybdenum 0.013 %
Measured & Indicated In-Situ (OP) 16 Mt Gold 0.66 g/t
Measured & Indicated In-Situ (UG) 123 Mt Gold 0.35 g/t
Measured & Indicated Total 139 Mt Gold 0.39 g/t
Measured & Indicated In-Situ (OP) 16 Mt Copper 0.2 %
Measured & Indicated In-Situ (UG) 123 Mt Copper 0.37 %
Measured & Indicated Total 139 Mt Copper 0.35 %
Measured & Indicated In-Situ (UG) 123 Mt Molybdenum 0.014 %
Inferred In-Situ (OP) 6 Mt Gold 0.48 g/t
Inferred In-Situ (UG) 1 Mt Gold 0.28 g/t
Inferred Total 7 Mt Gold 0.45 g/t
Inferred In-Situ (OP) 6 Mt Copper 0.2 %
Inferred In-Situ (UG) 1 Mt Copper 0.29 %
Inferred Total 7 Mt Copper 0.21 %
Inferred In-Situ (UG) 1 Mt Molybdenum 0.014 %

Commodity Production Costs:

CommodityUnits20162015
Total cash costs Gold USD 723 / oz   954 / oz  
Total cash costs Gold USD 509 / oz†   1,264 / oz†  
All-in sustaining costs (AISC) Gold USD 603 / oz†   1,670 / oz†  
† Net of By-Product.

Operating Costs:

Units2015
OP mining costs ($/t mined) USD 3
OP mining costs ($/t milled) USD  ......  Subscription required
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Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2021
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2008

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Annual Report 2018
Corporate Presentation 2018
Other 2018
Press Release 2018
Annual Report 2017
Financial Review 2017
Annual Report 2016
Annual Report 2016
Annual Report 2016
Annual Report 2015
Annual Report 2015
Annual Report 2015
Annual Report 2015
Corporate Presentation 2015
Annual Information Form 2008
Other 2003
Year-end Mineral Reserves 2003
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