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Peru
Cuajone Mine

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 Location:
30 km NE from Moquegua, Peru

  Regional Office:
Av. Caminos del Inca 171 Urb. Chacarilla del Estanque Santiago de Surco
Lima
Peru
Phone  ...  Subscription required
Fax(511)-512-0492
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life48 years (as of Jan 1, 2021)
Latest NewsFerreyros helps Southern Peru Copper Corporation achieve new availability heights with Cat electric rope shovels at Cuajone     December 23, 2022


Owners

Source: p. 50,51
CompanyInterestOwnership
Grupo Mexico S.A. de C.V. 88.27 % Indirect
Ownership Tree
The Project is wholly owned by Southern Copper Corporation, Sucursal del Perú, which is a majority-owned, indirect subsidiary of Grupo Mexico S.A.B de CV.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Porphyry


Summary:

The Cuajone deposit is considered to be an example of a porphyry copper–molybdenum deposit.

The deposit is approximately 2,300 m long, 900 m wide, and averages 1000 m in thickness. Mineralization has been drill tested to a depth of 2,255 m. The deposit remains open at depth.

Mineralization and alteration at the Cuajone deposit is directly related to a multi-stage latite porphyry that intrudes basaltic andesites and the overlying 370 m of rhyolite porphyries of the Toquepala Group.

The first, pre-mineral intrusive in the mine area, situated approximately 1–2 km to the west of the deposit, was a north–south-elongated, 0.7 x 0.35 km, grey to grey-green holocrystalline to equigranular, medium grained, porphyritic diorite stock. This was followed by emplacement of three latite porphyry stages, producing a 2.5 x 0.7 km, northwest–southeast-elongated intrusive body. The latite multiphase intrusion hosts the mineralization.

The first magmatic pulse of the latite porphyry was concentrated in the southeastern part of the multiple intrusive mass and was responsible for the introduction of the bulk of the hypogene copper and molybdenite mineralization in the Cuajone orebody and the associated intense alteration of both the latite and surrounding Toquepala Group andesites and rhyolites. The intrusion is a porphyry with phenocrysts of quartz to 4 mm in diameter and laths of feldspar in a cryptocrystalline matrix. Alteration takes the form of a ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Cuajone Operations use conventional truck-and-shovel open pit mining methods.

The open pit mine has a circular conical shape with a diameter of approximately 3.0 km. Currently, the highest elevation of the pit walls is on the southeast wall at 3865 masl. The current bottom of the pit is at 2950 masl, while the depth of the final pit design will be at 2590 masl. Nine pit phases remain in the life-of-mine (LOM) plan, starting with phase 6 and ending with phase 10C.

Pit Design Criteria Summary:
Bench height - 15m;
Minimum mining width - 80m;
Ramp width - 40m;
Ramp gradient - 10%;
Geotechnical berm width - 30-40m;

Mining is conducted using two 12-hr shifts. The mining operations can be summarized as:
• Initial drilling and blasting;
• Loading, using shovels, of the blasted material into haul trucks;
• Transport of ore and waste, depending on destination to WRSFs, run-of-mine (ROM) leach deposit, leach crusher, and mill crusher.

The LOM plan assumes that all sulfide ore material goes directly to the mill crusher and all leachable material goes directly to the leach crusher. The point of transfer from mining to processing is at the point of the conveyors or delivery to the leach pad.

Three pit phases will be operational at any one time, to ensure that production rates can be met. A maximum mining capacity per phase of 80 Mt/a is assumed, with a maximum vertical advance rate of 10 benches per year.


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
Since 2019 stripping ratio obtained dividing waste by leachable material plus ore mined.

CommodityProductUnits2021202020192018201720162015
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required161158171178
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required661608656695
Molybdenum Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Molybdenum Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  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 required153,911 kt175,177 kt149,265 kt175,009 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required30,530 kt30,693 kt29,769 kt30,825 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required4.04 4.92 4.01 4.68
Tonnes milled  ......  Subscription required  ......  Subscription required29,056 kt29,575 kt29,751 kt30,681 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required90,000 t90,000 t90,000 t90,000 t
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Reserves at December 31, 2021:
Internal net smelter return cut-offs of US$9.147/t for concentrator, and an internal NSR cut-off of US$4.698/t for leaching process.

CategoryOreTypeTonnage CommodityGradeContained Metal
Probable ROM leach 22,006 kt Copper 0.497 % 240,999 k lbs
Probable Sulphide 1,333,559 kt Copper 0.492 % 14,452,169 k lbs
Probable Sulphide 1,333,559 kt Molybdenum 0.017 % 507,620 k lbs
Indicated Sulphide 282,338 kt Copper 0.47 % 2,943,603 k lbs
Indicated Sulphide 282,338 kt Molybdenum 0.02 % 105,843 k lbs
Inferred ROM leach 89 kt Copper 0.12 % 240 k lbs
Inferred Sulphide 601,363 kt Copper 0.32 % 4,286,113 k lbs
Inferred Sulphide 601,363 kt Molybdenum 0.01 % 144,217 k lbs

Financials:

Units202120202019201820172016
Book Value M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 704.3   453.5   473.8  
Subscription required - Subscription is required


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelQuantityStatus
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer (crawler) ....................... Subscription required ....................... Subscription required Existing
Dozer (crawler) ....................... Subscription required ....................... Subscription required Existing
Dozer (crawler) ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Grader ....................... Subscription required ....................... Subscription required Existing
Grader ....................... Subscription required ....................... Subscription required Existing
Loader ....................... Subscription required ....................... Subscription required Existing
Loader ....................... Subscription required ....................... Subscription required Existing
Loader ....................... Subscription required ....................... Subscription required Existing
Loader (FEL) ....................... Subscription required ....................... Subscription required Existing
Loader (FEL) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Shovel ....................... Subscription required ....................... Subscription required Existing
Shovel ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck (water) ....................... Subscription required ....................... Subscription required Existing
Truck (water) ....................... Subscription required ....................... Subscription required Existing
Truck (water) ....................... Subscription required ....................... Subscription required Existing
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Form 10-K 2018
Form 10-K 2017
Form 10-K 2016
Form 10-K 2015
Other 2014
Subscription required - Subscription is required.

News:

NewsDate
Ferreyros helps Southern Peru Copper Corporation achieve new availability heights with Cat electric rope shovels at Cuajone December 23, 2022

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