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Peru
Las Bambas Mine

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 Location:
73 km SW from Cusco, Peru

  Regional Office:
Av. El Derby 055, torre 3, piso 9 Surco
Lima
Peru
33
Phone+51-01-418-4444
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Sales
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusTemporary Suspension
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
On-Site Camp yes
Mine Life20 years (as of Jan 1, 2020)
Located in southern Peru, Las Bambas is one of the world's largest copper mines with world class high grade copper assets.

Due to safety concerns, Las Bambas will be unable to continue copper production as of 20 April 2022 (Peru time). MMG remains committed to working closely with the Government of Peru and the community members to deliver its commitments and to engage in transparent and constructive dialogue with the aim of reaching an enduring agreement.
Latest NewsMMG Ltd.: Las Bambas update     April 19, 2022


Owners

Source: p. 23
CompanyInterestOwnership
CITIC Metal Co. Ltd 15 % Indirect
Guoxin International Investment Co. Ltd 22.5 % Indirect
MMG Ltd. (operator) 62.5 % Indirect
Las Bambas is a joint venture project between the operator MMG (62.5%), a wholly owned subsidiary of Guoxin International Investment Co. Ltd (22.5%) and CITIC Metal Co. Ltd (15.0%).

Deposit Type

  • Skarn
  • Porphyry

Source: Source

Summary:

Las Bambas is located in a belt of Cu (Mo-Au) skarn deposits associated with porphyry type systems situated in south-eastern Peru. This metallogenic belt is controlled by the Andahuaylas-Yauri Batholith of Eocene- Oligocene age, which is emplaced in Mesozoic sedimentary units, with the Ferrobamba Formation (Lower-to-Upper Cretaceous) being of greatest mineralising importance.

The porphyry style mineralisation occurs in quartz-monzonite to granodiorite rocks. Hypogene copper sulphides are the main copper bearing minerals with minor occurrence of supergene copper oxides and carbonates near surface. The intrusive rocks of the batholith in contact with the Ferrobamba limestones gave rise to contact metamorphism and, in certain locations, skarn bodies with Cu (Mo-Au) mineralisation.


Mining Methods

  • Truck & Shovel / Loader

Source: p.37, 46, 50

Summary:

Mining of the Las Bambas deposits is undertaken by open pit method, which is expected to continue throughout the life of mine. Large scale mining equipment including 300 tonne trucks and 100 tonne electric face shovels are used for material movement.

The mining method selected for the Las Bambas operation is open cut mining, which enables bulk mining of these large low to moderate grade mineral deposits that are outcropping to sub-cropping. Three deposits, Ferrobamba, Chalcobamba and Sulfobamba are each mined in separate open pits. Mining is by way of conventional truck and shovel operation. This method and selected mining equipment are appropriate for these deposits.

In the pit, the minimum mining width is 70m; the Selective Mining Unit (SMU) has been set at 20m x 20m x 15m.


Crushing and Grinding


Processing

  • Flotation

Source: Source

Summary:

The metallurgical process is a conventional froth flotation concentrator and thickener to produce two separate Cu and Mo concentrates and is appropriate for the style of mineralization.

Metallurgical Copper concentration process comprises the following activities; Crushing, Grinding and Flotation, producing copper and molybdenum concentrates. Copper concentrates contain gold and silver as byproducts.

The ore is crushed and transported on a 5.5-kilometre overland conveyor to a conventional flotation plant where copper concentrate is produced, then to a molybdenum plant for further processing. Concentrate is then transported by truck and rail to the Port of Matarani in the Arequipa region, where it is shipped to customers worldwide.

Recoveries & Grades:

CommodityParameter20202019201820172016
Copper Head Grade, % 0.790.840.91.050.93
Copper Recovery Rate, % 8788.186.284.377.1
Copper Concentrate Grade, % 34.838.537.938.136
Molybdenum Concentrate Grade, % 47.54748.949.2
Molybdenum Recovery Rate, % 79.580.1

Production:

CommodityProductUnits202120202019201820172016
Copper Metal in concentrate t 310,000-330,000 ^311,020382,518385,299453,749330,227
Copper Concentrate kt 8939941,0181,192926
Molybdenum Metal in concentrate t 3,1671,7831,9611,431
Molybdenum Concentrate kt 6.73.842.9
Gold Payable metal oz 72,86091,439107,850129,724
Silver Payable metal oz 4,092,8724,581,7145,483,7966,350,308
^ Guidance / Forecast.

Operational Metrics:

Metrics20202019201820172016
Ore tonnes mined 57,999,845 t51,653,616 t57,439,971 t52,873,113 t46,910,080 t
Waste 137,484,467 t128,286,976 t115,709,415 t
Tonnes milled 45,184,395 t51,283,371 t49,443,867 t51,497,642 t46,502,808 t

Reserves at June 30, 2020:
The Mineral Reserves are reported above a range of cut-offs based on material type and ore body. Ferrobamba Primary Copper - 0.18% to 0.21% Cu cut-off grade based on rock type and recovery; Chalcobamba Primary Copper - 0.21% to 0.30% Cu cut-off grade based on rock type and recovery; Sulfobamba Primary Copper - 0.23% to 0.27% Cu cut-off grade based on rock type and recovery.

The Mineral Resources are reported above a range of cut-offs based on material type and ore body. The cut-off grades range from 0.16% Cu cut-off grade for hypogene material to 0.19% Cu for marble/calc-silicate hosted material and 0.17% Cu for breccia at Ferrobamba. Oxide material has been reported above a 1% Cu cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 867 Mt Copper 0.65 % 5,631 kt
Proven & Probable 867 Mt Molybdenum 191 ppm 165 kt
Proven & Probable 858 Mt Gold 0.05 g/t 1.3 M oz
Proven & Probable 867 Mt Silver 2.9 g/t 81 M oz
Total Resource 1,429 Mt Copper 0.63 % 8,982 kt
Total Resource 1,410 Mt Molybdenum 177 ppm 249 kt
Total Resource 1,410 Mt Gold 0.04 g/t 1.9 M oz
Total Resource 1,410 Mt Silver 2.91 g/t 132 M oz

Commodity Production Costs:

CommodityUnits202120202019201820172016
C1 cash costs Copper USD 1.15 / lb ^† 1 / lb† 0.99 / lb† 1.18 / lb† 0.99 / lb† 1.02 / lb†
^ Guidance / Forecast.
† Net of By-Product.

Financials:

Units20202019201820172016
Revenue M USD 2,079  2,013  2,579   2,937   1,224  
EBIT M USD 500.8  540.7  699.7   1,151   405.2  
EBITDA M USD 1,196  1,237  1,341   1,741   655  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
Drilling & Blasting Superintendent Derly Sandy Vizcarra Arias LinkedIn May 23, 2022
General Manager Edgardo Orderique LinkedIn May 30, 2021
Maintenance Manager Manuel Valverde LinkedIn May 30, 2021
Maintenance Superintendent Henry Rondon LinkedIn May 30, 2021
Mine Operations Superintendent Abdon Guillen Medina LinkedIn May 30, 2021
Operational Readiness Manager Eric Ruiz LinkedIn May 30, 2021
Plant Manager Edgar Canta LinkedIn May 23, 2022

Staff:

EmployeesContractorsTotal WorkforceYear
2,205 4,164 6,369 2020
1,792 3,999 5,791 2019
1,900 6,800 8,700 2018
1,726 6,568 8,294 2017
9,134 2016

Corporate Filings & Presentations:

DocumentYear
Annual Report 2020
Quarterly Report 2020
Sustainability Report 2020
Year-end Mineral Reserves 2020
Annual Report 2019
Quarterly Report 2019
Sustainability Report 2019
Year-end Mineral Reserves 2019
Quarterly Report 2018
Sustainability Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Corporate Presentation 2017
Quarterly Report 2017
Sustainability Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Other 2016
Sustainability Report 2016
Year-end Mineral Reserves 2016

News:

NewsDate
MMG Ltd.: Las Bambas update April 19, 2022
Las Bambas Receives Approval For Chalcobamba Development March 24, 2022
MMG Ltd.: Voluntary announcement Las Bambas update February 7, 2022
MMG's Las Bambas mine to restart copper output after Peru deal December 30, 2021
Peru protesters to clear Las Bambas road, but unclear if mine will restart December 22, 2021
MMG Ltd.: Las Bambas update December 16, 2021
MMG Limited: Voluntary announcement Las Bambas update December 3, 2021

Aerial view:

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