Hillside Project

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Mine TypeOpen Pit
  • Copper
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotHillside Copper-Gold Project is the fourth-largest Copper Ore Reserve in Australia.

Rex Minerals Ltd. (Company) is progressing with its Operational Readiness plans for Hillside, advancing EPCM definition phase engineering and development of major contracts with key contractors for processing, mining and associated infrastructure requirements. This includes building of the owner and partner teams consistent with the Operational Readiness schedule and plan. Key regulatory approvals are now in place to allow commencement of development and mining operations including lodging and approval of the $34.2 million rehabilitation bond.


Rex Minerals Ltd. 100 % Indirect
The Hillside Copper-Gold project is 100% owned by Rex Minerals Ltd.



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Deposit type

  • IOCG


Hillside is an Iron-Oxide-Copper-Gold (IOCG) style deposit, located within the Moonta Subdomain of the Olympic Dam Cu-Au Province on the eastern Gawler Craton of South Australia.

The geological framework at Hillside is dominated by due north trending faulting and geological contacts. These dominant trends are disrupted by a number of north-west and north-east striking faults which appear to have an influence on the host rocks, alteration and the copper-gold mineralisation.

Copper-gold mineralisation is hosted by a sequence of intensely altered skarns and metasediments. The primary copper zones comprise parallel, steeply-dipping structures of massive, disseminated and dispersed sulphide dominated by chalcopyrite with subordinate bornite and chalcocite.

Secondary (oxide) copper exhibits flat lying to steeply dipping orientations immediately above primary copper mineralisation dominated by malachite with subordinate azurite, cuprite, atacamite, chrysocolla, copper in chlorite and native copper.

Mineralisation which predominantly strikes north-south has so far been observed over the area of 2.3km north-south length and a 900m west-east width. At least four structures with individual coppermineralised strike lengths of +2.0km have been defined to date. Copper mineralisation within all structures remains open along strike and at depth, and has been observed from as shallow as 5m below surface to 710m below surface with true widths estimated to be in the order of 1 to 130m with an average true ore domain thickness of 27m.

Primary mineralisation zones within the Hillside deposit are sub-parallel to the lithostratigraphic architecture.

Primary Hillside mineralisation strikes approximately north-south and has variable steep dips (70 to 80 degrees) to the west and occasionally east. Leprena mineralisation strikes approximately east-west and dips (60 – 70 degrees) to the north.

Secondary mineralisation strikes approximately north-south and tends to be steeply dipping immediately above primary mineralisation and in zones grading to flat lying to shallow dipping dispersion zones (on average 10 to 30 degrees).

Mineralisation has so far been observed from 6173130N to 6175500N, 763150E to 764000E and 60RL to -710RL. Approximately 90% - 95% of the total target size (at surface) has been tested and the deposit remains open towards the north and south and at depth.



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Mining Methods


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Crushers and Mills


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CommodityProductUnitsAvg. Annual
Copper Payable metal kt 42
Copper Concentrate kt 151
Gold Payable metal koz 30

Operational metrics

Annual mining rate  ....  Subscribe
Annual processing capacity  ....  Subscribe
Stripping / waste ratio  ....  Subscribe
* According to 2022 study.

Production Costs

All-in sustaining costs (AISC) Copper USD  ....  Subscribe
C1 cash costs Copper USD  ....  Subscribe
Assumed price Copper USD  ....  Subscribe
Assumed price Gold USD  ....  Subscribe
* According to 2022 study / presentation.
** Net of By-Product.

Operating Costs

OP mining costs ($/t mined) AUD 2.08 *  
OP mining costs ($/t milled) AUD  ....  Subscribe
Processing costs ($/t milled) AUD  ....  Subscribe
G&A ($/t milled) AUD  ....  Subscribe
Total operating costs ($/t milled) AUD  ....  Subscribe
* According to 2022 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Sustaining CapEx $M AUD  ......  Subscribe
Closure costs $M AUD  ......  Subscribe
Total OpEx $M AUD  ......  Subscribe
Royalty payments $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 4.88% $M AUD  ......  Subscribe
After-tax NPV @ 4.88% $M AUD  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Heavy Mobile Equipment


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Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 30, 2023
....................... Subscription required ....................... Subscription required Subscription required May 30, 2023

Total WorkforceYear
...... Subscription required 2022


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