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Chile
Lomas Bayas Mine

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 Location:
92 km E from Antofagasta, Chile

  Regional Office:
General Borgoño 934, oficina 502
Antofagasta
Chile
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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
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2029
Lomas Bayas mine is open pit copper mine. Lomas Baya are part of the fourth largest copper producer in the world.


Owners

Source: p. 10
CompanyInterestOwnership
Glencore plc. 100 % Indirect
Compania Minera Lomas Bayas S.A. (operator) 100 % Direct
Lomas Bayas Mining Company, 100% owned by Glencore.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Breccia pipe / Stockwork
  • Porphyry


Summary:

Lomas Bayas is a low grade Cu-Mo deposit resulting from the intrusion of several porphyry and breccia systems that were later exposed to leaching and subsequent supergene enrichment and in situ oxidation. Green copper oxides, copper sulphates in various forms and less partially mixed ores are the main source of ore for the existing SX/EW operation. The copper oxidessulphate mineralisation is the basis of the Lomas Bayas Ore Reserves (Lomas Bayas I).

The deposit is located in a structural framework formed by three sets of faults along an ENE bend in the Tertiary strike-slip San Cristóbal Fault system. The deposit area is mainly underlain by granodiorite that has been intruded by a cluster of small granodiorite and/or granite to dacite porphyry bodies of the Lomas Porphyry. Later events, focused by the structural framework, include the emplacement of breccia pipes and zones as well as hydrothermal alteration and copper mineralisation.

The deposit area is characterised by a structural regime, the main structural elements of which are NNE, NW, north-south and WNW-trending high-angle faults and fractures, as well as west to SW-dipping, low-angle faults and fractures that occur to the north of the ENE-trending South Fault Zone.

Both primary and supergene mineralisation occurs at Lomas Bayas. The upper parts of the orebody are generally oxidised, with a few zones of mixed oxide-sulphide, and it is principally exploited as a heap-leach operation. C ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Lomas Bayas open cut operations are located in the centre of the Atacama Desert copper belt approximately 115 km to the northeast of the town of Antofagasta in Chile.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Copper kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required737880
All production numbers are expressed as cathode.
Subscription required - Subscription is required.


Reserves at December 31, 2022:

CategoryOreTypeTonnage CommodityGrade
Proven & Probable Oxide 294 Mt Copper 0.3 %
Measured & Indicated Sulphide 685 Mt Copper 0.34 %
Measured & Indicated Oxide 756 Mt Copper 0.27 %
Inferred Sulphide 620 Mt Copper 0.27 %
Inferred Oxide 90 Mt Copper 0.21 %

Financials:

Units20212020
Operating Income M USD  ......  Subscription required  ......  Subscription required
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Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Drill ....................... Subscription required ....................... Subscription required May 25, 2023
Truck (haul) ....................... Subscription required 320 tons ....................... Subscription required Mar 24, 2023
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Sustainability Report 2016
Other 2015
Press Release 2015
Annual Report 2014
Corporate Presentation 2012
Annual Report 1998
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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