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Australia
Hillside Project

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 Location:
12 Km S from Ardrossan, South Australia, Australia

  Project Contacts:
68 St Vincent Highway
Pine Point
South Australia, Australia
5571
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life11 years (as of Jan 1, 2022)
Hillside is fully permitted with key approvals in place.
Latest NewsRex Minerals Ltd.: 2022 Hillside Mineral Resource and Ore Reserve Statement     December 14, 2022


Owners

Source: p. 1
CompanyInterestOwnership
Rex Minerals Ltd. 100 % Indirect
The Hillside Copper-Gold project is 100% owned by Rex Minerals Ltd.

Contractors

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Deposit Type

  • IOCG


Summary:

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 estimat ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining method was based on open pit mining, utilising hydraulic excavators and trucks for primary haulage, with drill and blast practices for rock breakage and wall control. Ramps were designed for exiting and entering the pit carrying two-way traffic, to achieve production requirements.

Previous haul road design widths of 35m have been increased to 40m as part of future-proofing production rates.

Open pit mining dimensions (minimum Selective Mining Unit (SMU)) are 3m x 3m x 5m. Mining dilution was added by creating an SMU and then adding 0.25m edge dilution. Overall dilution is approximately 5% to the Mineral Resource.

mine schedule. A minimum mining width of 35m was applied.

The Stage One Mine Plan open pit is value optimised and is designed in five phases. Rock movement is scheduled to ensure adequate operating area and access to ore.

After an initial pre-strip of 54Mt, the strip ratio for the operating life is 6.9:1 (waste tonnes : ore tonnes).

Peak total rock haulage is approximately 65Mtpa. Almost 90% of all material (ore and waste) will be mined with 550t hydraulic backhoe excavators, coupled with a fleet of ultra-class (296t) trucks, using the double-benching method. Narrower ore zones will be mined with 250t backhoe excavators to minimise dilution and improve ore recovery. Peak material movement is achieved with a manageable maximum of 17 trucks. The Project has a typical support fleet which includ ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

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

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual mining rate  ......  Subscription required
* According to 2022 study.
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Reserves at December 14, 2022:
Copper Resources reported above a 0.2% cut-off.

CategoryTonnage CommodityGradeContained Metal
Proven 61 Mt Copper 0.5 % 301 kt
Proven 61 Mt Gold 0.16 g/t 307 koz
Probable 125 Mt Copper 0.55 % 688 kt
Probable 125 Mt Gold 0.13 g/t 527 koz
Proven & Probable 186 Mt Copper 0.53 % 989 kt
Proven & Probable 186 Mt Gold 0.14 g/t 834 koz
Total Resource 337 Mt Copper 0.56 % 1,897 kt
Total Resource 337 Mt Gold 0.14 g/t 1,528 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Copper USD  ......  Subscription required *†
C1 cash costs Copper USD  ......  Subscription required *†
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2022
OP mining costs ($/t mined) AUD 2.08 *
OP mining costs ($/t milled) AUD  ......  Subscription required
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2022 study.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Closure costs $M AUD  ......  Subscription required
Total OpEx $M AUD  ......  Subscription required
Royalty payments $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 4.88% $M AUD  ......  Subscription required
After-tax NPV @ 4.88% $M AUD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of December 14, 2022:
HME TypeSizeQuantity
Backhoe 550 t
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 25, 2023
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required 2022
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Feasibility Study Report 2022
Press Release 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2020
Subscription required - Subscription is required.

News:

NewsDate
Rex Minerals Ltd.: 2022 Hillside Mineral Resource and Ore Reserve Statement December 14, 2022
Rex commits to next phase of Hillside Copper-Gold Project December 14, 2022

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