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Australia

Prominent Hill Operation

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Australia

Prominent Hill Operation

Location: 111 km SE from Coober Pedy, South Australia, Australia

Regional Office:

10 Franklin St
Adelaide
South Australia, Australia
5000

Contacts:

Additional Resources for Suppliers & Investors

Categories

Summary

Mine TypeUnderground
StatusActive
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Sub-level open stoping (SLOS)
Backfill type ... Lock
Production Start... Lock
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SnapshotProminent Hill Operation produces one of the highest grades of copper concentrate in the world.

Prominent Hill was first developed as an open-pit mine, however, mining activities are currently principally underground. Ore at Prominent Hill is collected from the Ankata and Malu underground open stoping mine areas.

Wira Shaft Expansion works advanced and as of 2024, the shaft sink is approximately 35 percent complete at a current depth of approximately 450 meters. It is expected to be fully operational by the end of 2025.
Related AssetsAnkata/Malu (UG) Mine, Malu (OP) Mine

Owners

SourceSource
CompanyInterestOwnershipInvestor's Info
BHP Group Ltd. 100 % Indirect
BHP Group Ltd. has 100% interest in the Prominent Hill Operation through its wholly owned subsidiary OZ Minerals Prominent Hill Operations Pty Ltd.

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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SourceSource

Deposit type

  • Breccia pipe / Stockwork
  • IOCG

Summary:

The Prominent Hill iron oxide copper gold (IOCG) deposit is located in the northeastern portion of the Archaean to Mesoproterozoic Gawler Craton, South Australia. Copper-gold-silver mineralisation at Prominent Hill is mostly hosted within hematitematrix breccia containing fragments of sandstone, siltstone, dolostone, and mafic to intermediate volcanic rocks. Copper mineralisation occurs as disseminations of chalcocite, bornite and chalcopyrite in the matrix of the breccia.

Mineralisation generally has a tabular geometry. Most but not all copper mineralisation is hosted in hematite breccia. Gold mineralisation is commonly coincident with copper mineralisation, but some zones of gold-only mineralisation do exist. Copper grades generally show better spatial continuity within hematite breccia than within other rock types. Barren dykes cross cut the mineralisation. Barren covering sediments overlie the mineralised basement rocks.

The current maximum extent of the reported Mineral Resource is 2,600m (east-west) by 1,400m (vertical). Multiple lenses exist within a mineralised zone having a plan width (across strike) of approximately 300-400m. Only a subset of this mineralised zone has sufficient continuity of grade to have been reported as a Mineral Resource. The upper and lower limits of the reported Mineral Resource are 100m and 1,462m respectively below the pre-mining topographic surface.

Reserves

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Mining Methods

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Heavy Mobile Equipment

Fleet data has not been reported.

Comminution

Crushers and Mills

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Processing

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Commodity Production

The production for 2023 includes Estimated data for the period from January 1, 2023, to June 30, 2023. Because of the acquisition of OZL by BHP on 2 May 2023, OZL reported production only for the first quarter of 2023:
• Ore tonnes mined: 1,200,155 t;
• Tonnes milled: 1,800,931 t;
• Copper concentrate: 25,107 t;
• Copper metal in concentrate: 13,075 t;
• Gold metal in concentrate: 24,215 oz;
• Silver metal in concentrate: 82,399 oz.

BHP reported production for two months – May and June 2023:
• Ore tonnes mined: 661 kt;
• Tonnes milled: 1,228 kt;
• Copper concentrate: 16.3 kt;
• Copper payable metal: 8.2 kt;
• Payable gold concentrate: 17,432 oz;
• Payable silver concentrate: 44 koz.

Further, unlike OZL, BHP changed its financial year for future reporting to run from July 1 to June 30.

In 2025, after depleting the remaining open-pit gold, copper and marginal stockpiles, the processing plant will be fed from underground sources only.
CommodityProductUnits202420232022202120202019201820172016
Copper Metal in concentrate M lbs  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe226243247258
Copper Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe234260
Gold Metal in concentrate koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe123131127118
Silver Metal in concentrate koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe630703

Operational metrics

Metrics202420222021202020192018201720162015
Annual milling capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe10 Mt10 Mt
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe3,365,932 t5,132,570 t16,963,931 t17,135,805 t
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe9,807,885 t9,830,063 t9.5 Mt10.6 Mt
Waste  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe951,444 t1,443,016 t
Total tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe4,317,376 t6,575,586 t25,272,373 t44,948,296 t

Production Costs

CommodityUnits202220212020201920182017
Credits (by-product) Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe -0.79 / lb   -0.71 / lb  
Total cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 0.76 / lb **   0.95 / lb **  
All-in sustaining costs (AISC) Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 0.99 / lb **   1.14 / lb **   1.2 / lb **  
C1 cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 0.56 / lb **   0.73 / lb **   0.83 / lb **  
** Net of By-Product.

Mine Financials

Units202220212020201920182017
Capital expenditures M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 105.8   77.4   53.6  
Revenue M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 1,041   1,066   1,023  
EBIT M AUD 367.4  
EBITDA M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe 587.4   618.2   583.1  

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 2, 2024
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Workforce

EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2021
...... Subscription required ...... Subscription required ...... Subscription required 2020
...... Subscription required 2018
...... Subscription required 2017
...... Subscription required 2016

Aerial view:

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