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Chile
Maricunga (Refugio) Mine

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 Location:
103 km E from Copiapo, Chile

  Regional Office:
Avenida Los Carrera 6651
Copiapo
Chile
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageReclamation
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2020
In 2020, a new and final extension of the closure plan until 2023 was approved. Kinross estimates the net present value of future cash outflows for site reclamation and remediation costs at Maricunga under IFRS as at December 31, 2021, at approximately $74.9 million.


Owners

Source: p. 65
CompanyInterestOwnership
Kinross Gold Corp. 100 % Indirect
Compania Minera Maricunga S.A. (operator) 100 % Direct
The Maricunga heap leach mine, formerly known as the Refugio mine, is owned and operated by CMM.

Contractors

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Deposit Type

  • Porphyry
  • Breccia pipe / Stockwork


Summary:

Gold mineralization at Maricunga has been interpreted to be porphyry style gold systems.

The Verde and Pancho gold deposits at Maricunga occur in the Maricunga Gold Belt of the high Andes in northern Chile.

The Maricunga volcanic-intrusive complex is exposed over an area of 12 km2 and consists of andesitic to dacitic domes, flows, and breccias that are intruded by subvolcanic porphyries and breccias (Muntean 1998).

At Verde West, gold mineralization is centered about an elliptical porphyry plug measuring 175 by 100 m and oriented at N30°W. At Verde East, the porphyry plug measures 130 by 80 m and is oriented at N35°E. The porphyries occur within a sequence of intermediate tuffs, porphyries and breccias that are the host rocks to the gold mineralization. Lithological interpretation at Verde has identified six major lithologic units. These are:

• Post mineral intrusives (barren);
• Mineralized post mineral intrusives;
• Verde breccia;
• Dacite porphyry;
• Dacite tuffs;
• Laguna tuff (barren).

The most favourable ore hosts are the Verde Breccia and Dacite Porphyry units. The dacite porphyry is a volcanic to hypabyssal intrusive rock with 20% to 40% plagioclase phenocrysts in a fine-grained matrix. It contains phenocrysts of biotite, hornblende, and sparse quartz. The unit is the best host for stockwork veining, with some portions containing up to 20% quartz-magnetite ± pyrite veinlets.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Maricunga is an open pit mine. The ore is transported by haul truck to the three-stage crusher and then to the heap leach pad.


Crushing and Grinding

The Maricunga gold recovery process consists of a single-line primary crushing, fine crushing (secondary and tertiary).

The plant can process 48,000 tonnes per day of dry Maricunga ore. The crushing plant product is approximately 80% passing 12 millimetres.


Processing

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Summary:

- subscription is required.


Production:
As a result of the suspension of mining and crushing activities at Maricunga, there was no new ore mined and processed in both 2020 and 2019. Production continued through 2019 as ounces continued to be recovered from the heap leach pads until the fourth quarter of 2019 when production activities transitioned to care and maintenance.

CommodityUnits202020192018201720162015
Gold Equivalent oz  ......  Subscription required  ......  Subscription required60,06691,127175,532212,155
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2016201520142013
Ore tonnes mined 6,059 kt12,261 kt16,900 kt18,236 kt
Tonnes processed 6,508 kt12,790 kt16,018 kt15,058 kt
Daily milling capacity 48,000 kt40,000 t
Annual milling capacity 14 Mt

Reserves at December 31, 2020:

CategoryTonnage CommodityGradeContained Metal
Measured 35,555 kt Gold 0.8 g/t 905 koz
Indicated 312,171 kt Gold 0.6 g/t 6,166 koz
Measured & Indicated 347,726 kt Gold 0.6 g/t 7,071 koz
Inferred 153,276 kt Gold 0.6 g/t 2,782 koz

Commodity Production Costs:

CommodityUnits20202019201820172016
Cash costs (sold) Gold Equivalent USD  ......  Subscription required  ......  Subscription required 730 / oz   482 / oz   827 / oz  

Financials:

Units20202019201820172016
Capital expenditures M USD 1.5   5.1  
Revenue M USD  ......  Subscription required  ......  Subscription required 113.6   52   219.4  
Operating Income M USD  ......  Subscription required  ......  Subscription required 45.1   21.3   -150.6  
Gross profit M USD  ......  Subscription required 43.9   27.5   -99.8  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 8, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Other 2016
Annual Information Form 2015
Annual Report 2015
Press Release 2015
Annual Report 2014
Press Release 2014
Technical Report 2007
Subscription required - Subscription is required.

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