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Coburn Extension Project

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Mine TypeOpen Pit
StagePreliminary Economic Assessment
  • Heavy Minerals
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotThe purpose of the Scoping Study was to ascertain the financial benefits of a longer mine life by scheduling production targets from the JORC-compliant (2012) Indicated (7Mt @ 1.1% THM) and Inferred (702Mt @ 1.2% THM) Mineral Resources. The Mineral Resources lie north and directly adjacent to the current granted Mining and Retention Licences and are interpreted to represent the strike continuation of the same body of mineralisation currently defined by the DFS Ore Reserves.

The production targets are scheduled from year 23 when the current DFS Ore Reserves are depleted and additional feed is required. The Extension Case adds 15 years of production to the mine life (total 37.5 LOM).
Related AssetCoburn


Strandline Resources Ltd. 100 % Indirect

Deposit type

  • Mineral sands


Coburn is a world-scale mineral sands deposit, containing a rich zircon-titanium HM assemblage, with 20Mt of in-situ HM, low slimes, low oversize and strong geological continuity across and along strike.

Coburn’s Amy deposit was discovered in 2000 after prospectors identified that the ancient coastline at Coburn was an ideal trap-site for heavy mineral sands with its characteristic hook shape.

Mineralisation consists of an accumulation of mainly aeolian sands deposited over a Cretaceous basement of clays, clayey sands and limestone.

A total of 3 dune sequences containing heavy mineral are recognised across the project area.

The Amy South mineralisation has a strike length of approximately 27 km, a width up to 3 km and a maximum thickness of approximately 50 metres. Amy North adds a further 6km in strike length.

IHC Robbins issued (November-2018) JORC compliant Global Mineral Resource estimate of 1.6Bt HM at 1.2% THM (cut-off grade of 0.8%).

Measured-Indicated resources of 726Mt at 1.3% THM contained in the Amy South deposit (doesn’t include Amy North) have been evaluated as part of the DFS and updated Ore Reserve.

Amy South deposit comprises an exceptionally rich heavy mineral assemblage of 22% zircon, 12% rutile-leucoxene and 48% ilmenite.

Indicated-Inferred resources extending north and along strike of the Ore Reserve, totals 709Mt at 1.2% THM which have been evaluated in the Mine Life “Extension Case” Scoping Study.



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Mining Methods


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Crushers and Mills

Milling equipment has not been reported.



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Combined production numbers are reported under Coburn

Operational metrics

Annual ore mining rate  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
* According to 2020 study.

Production Costs

Commodity production costs have not been reported.

Project Costs

MetricsUnitsLOM Total
Total OpEx $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
EBITDA (LOM) $M AUD  ......  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 18, 2023


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