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Australia

Port Gregory Project

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Categories

Summary

Mine TypeOpen Pit
Study CompletedPreliminary Economic Assessment
Study in ProgressPrefeasibility
StagePermitting
Commodities
  • Heavy Minerals
  • Garnet
  • Ilmenite
  • Zircon
  • Rutile
Mining Method
  • Dry mining
Mine Life... Lock
SnapshotOn 12 Sep 2022, Heavy Minerals Limited announced the results of the Port Gregory Scoping Study and Preliminary Economic Assessment.

Metallurgy results for the Port Gregory Garnet Project highlight that the potential products produced could be marketed as blasting grade products and water jet cutting products. The ilmenite stream has the potential to also add revenue to the project as a valuable by-product.

On 10 July 2023, Heavy Minerals updated the Mineral Resource estimate for the Port Gregory Garnet Project, increasing it by 23%.

As of the end of 2025, Pre-Feasibility Study (PFS) work for the Port Gregory Garnet Project was ongoing, and the PFS was near completion.

On 23 Oct 2023, Heavy Minerals announced the commencement of permitting activities for the Port Gregory project. The Company has received all documentation for the Mining Lease Application for Port Gregory which it intends to lodge in Q1 2026.

Owners

SourceSource
CompanyInterestOwnership
Heavy Minerals Ltd. 100 % Indirect
The Port Gregory Project is 100% owned by Heavy Minerals Limited.

Deposit type

  • Mineral sands

Summary:

The deposit style is a combination of dunal and fluvial / marine sediments. Heavy mineral accumulations are preserved throughout the stratigraphic sequence.

The local geology is dominated by dunal accumulations of grey to brown to white sand and Limesand. These sediments are thought to be Quaternary in age and overlay Silurian aged Tumblagooda Sandstone which is composed of a Red-bed sequence of sandstone; siltstone; and minor conglomerate. They locally appear to have been deposited in an embayment eroded into the Tumblagooda Sandstone.

The Limesand has been partially indurated with carbonate cementation and sandy limestone is locally developed. The older the formation the more induration appears to be developed.

Dimensions
The Mineral Resource field for the Project is approximately 5 km in length (at the longest point) and approximately 3 km wide (at the widest point). Depth of the Mineral Resource typically ranges from 10 m to 60 m depth dictated by the morphology of the project region and limestone basement.

Reserves

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Mining Methods

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Heavy Mobile Equipment

Fleet data has not been reported.

Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Commodity Production

The production profile of the Port Gregory Garnet Mine demonstrates annual production of 71 kt of Blasting grade garnet and 70 kt of Water Jet grade garnet.

Assumed Prices:
• Bulk Garnet – 20/40 is 752$/t;
• Bulk Garnet – 30/60 is 714$/t;
• Bulk Garnet 80 – WJ80 is 714$/t;
• Bulk Garnet 12 – WJ120 is 785$/t.
CommodityUnitsAvg. Annual
Garnet kt 141 *
Ilmenite kt 6 *
All production numbers are expressed as mineral. * According to 2022 study.

Operational metrics

Metrics
Annual ore mining rate  ....  Subscribe
Annual production capacity  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
* According to 2022 study.

Production Costs

CommodityAverage
Cash costs Heavy Minerals  ....  Subscribe
Assumed price Ilmenite  ....  Subscribe
* According to 2022 study / presentation.

Operating Costs

CurrencyAverage
Total operating costs ($/t milled) AUD  ....  Subscribe
* According to 2022 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Total OpEx $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
After-tax Cash Flow (LOM) $M AUD  ......  Subscribe
$M AUD  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Aerial view:

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