Brazil

Carajás East Operation

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Copper
  • Gold
Mining Method
  • Sub-level stoping
  • Bench stoping
Backfill type ... Lock
Production Start... Lock
Mine Life... Lock
SnapshotOZ Minerals' operations in Carajas – Pedra Branca mine and Antas Norte processing plant, and the Santa Lúcia project – are more than 10 km away from the Indigenous Lands.

Carajas Operation consist of mining ore containing copper and gold from the Pedra Branca underground mine and processing it at the processing facilities located at the Antas mine which support the Carajás East Hub in Brazil. The Carajás East Hub generates revenue from the sale of concentrate containing copper and gold to customers in Europe and Asia.

Mining of the Antas North open pit was completed in June 2021.

100% feeds of Pedra Branca material to the Antas mill have only occurred since June 2022.

The Santa Lúcia project is 100% owned by Vale and the Brazil National Economic Development Bank (BNDES) holds a right to participate in up to 50% of the economic results of the project.

OZ Minerals’ option to purchase the project from Vale was exercised in January 2023.
Related AssetsAntas (Antas North) Mine, Pedra Branca Mine

Owners

SourceSource
CompanyInterestOwnershipInvestor's Info
BHP Group Ltd. 100 % Indirect
OZ Minerals operates the Carajás East hub in Brazil.

On May 2, 2023, BHP announced the completion of the OZ Minerals acquisition and implementation of the scheme of arrangement for BHP Lonsdale Investments Pty Limited, a wholly owned subsidiary of BHP Group Limited, to acquire 100% of the shares in OZ Minerals Limited (OZL) (the Scheme). BHP Group Limited is now the ultimate parent company of OZL.

Contractors

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Deposit type

  • IOCG
  • Breccia pipe / Stockwork

Summary:

Pedra Branca iron oxide copper gold deposit is hosted within the Carajás Mineral Province which is located in the southern part of the Amazon Craton. Locally the craton is overlain by metavolcanic–sedimentary units of the Rio Novo Group and the 2.76 Ga Itacaiúnas Supergroup. The Itacaiúnas Supergroup hosts all the known Carajás iron oxide copper gold deposits and is thought to have been deposited in a marine rift environment. The Carajás Mineral Province represents one of the best endowed mineral districts in the world and contains the world’s largest known concentration of iron oxide copper gold deposits including the, Salobo, Igarapé Bahia, Alemão, Cristalino, Gameleira, Furnas, Alvo 118, Antas, Pedra Branca, Santa Lucia and Pantera deposits.

The Pedra Branca deposit consists of two distinct bodies, Pedra Branca East (PBE) and Pedra Branca West (PBW). Both exhibit typical IOCG features such as hydrothermal alteration types (sodic, calcic-sodic, calcic-ferric and potassic-ferric) and mineralisation style characterised by chalcopyrite + pyrrhotite ± pyrite in semi-massive levels, blebs, strings and disseminations.

Simplistically the geology of the PBE deposit is characterised by a series of strongly foliated to gneissic granitic composition footwall rocks to the north and a foliated diorite to granodioritic composition series of hanging wall rocks to the south. Between these two units a felsic mylonite shear zone is located which also hosts hydrothermal lithotypes dominated by actinolite and sulphide breccia. The mineralised breccia mapped at the contact of the hanging wall rocks usually has the highest grades of copper and is clearly delineated by an intense foliation of the hanging wall lithology.

The mineralised breccia includes mostly amphibole-magnetite fragments set in a sulphide-rich matrix displaying a chaotic fabric. Fragments vary from angular to sub-rounded in shape, interpreted to possibly be due to chemical erosion by the hydrothermal fluid. The matrix is mostly dominated by chalcopyrite and pyrrhotite, but also contains magnetite, apatite, and minor chlorite and ilmenite.

The actinolite domain is a pinkish rock bearing a foliated fabric dominated by actinolite, K-feldspar, apatite, tourmaline. Lenses of sulphide and magnetite occur within this domain in portion where the shearing was more penetrative.

At PBW, mineralisation is not as clearly constrained, and has been modelled as multiple lenses dipping approximately parallel to foliation. The main mineralised zone of interest at PBW is located towards the southern edge of the broader mineralised zone, near but not concordant with the boundary between the diorite and the gneiss.

Dimensions
The estimated Mineral Resource extends 1,700 metres along strike, with a 350 metres gap between the eastern and western lodes. Plan thickness varies between 130 metres in the west where there is a series of stacked vertical lenses to 20 metres in the east where the orebody presents as a single mineralised zone. Depth below surface to the upper limit of the Mineral Resource is 10-20 metres with the mineralisation extending vertically for 560 metres in the west and 815 metres in the East.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

CommodityProductUnits20232022202120202019
Copper Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe6,810
Gold Metal in concentrate oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe6,171
Copper Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe25
^ Guidance / Forecast.

Operational metrics

Metrics20232022202120202019
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe468,732 t
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe773,602 t
Annual processing capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Waste  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe4,849,538 t
Total tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
^ Guidance / Forecast.

Production Costs

CommodityUnits20232022202120202019
Credits (by-product) Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe -0.57 / lb  
Total cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 2.7 / lb **  
All-in sustaining costs (AISC) Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 2.95 / lb **  
C1 cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 2.35 / lb **  
^ Guidance / Forecast.
** Net of By-Product.

Financials

Units20232022202120202019
Capital expenditures (planned) M AUD  ....  Subscribe
Capital expenditures M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 9.9  
Revenue M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 66.2  
EBITDA M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 5  

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 26, 2023

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