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Heemskirk Project

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Categories

Summary

Mine TypeUnderground
Study CompletedPreliminary Economic Assessment
Study in ProgressPrefeasibility
Commodities
  • Tin
  • Copper
  • Lead
  • Zinc
Mining Method
  • Longhole stoping
  • Bench stoping
  • Drift & Fill
Backfill type ... Lock
Mine Life... Lock
SnapshotThe Heemskirk project is described as the third highest-grade undeveloped tin project globally and top three in the development queue.

The current development studies focus on the Queen Hill and Severn deposits.

Pre-feasibility activities are underway to evaluate potential project optimisations aimed at increasing tin output relative to the 2024 Scoping Study. These initiatives include resource and exploration drilling to upgrade and expand mineral resource classifications, together with ore-sorting test work designed to improve mill feed head grades and overall tin recoveries.

Owners

SourceSource
CompanyInterestOwnership
Stellar Resources Ltd. 100 % Indirect
The Heemskirk Tin Project is 100% owned by Stellar Resources Limited.

Contractors

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Deposit type

  • Intrusion related
  • Replacement
  • Stratabound

Summary:

The Heemskirk Tin Project consists of the Queen Hill and Severn tin deposits (two of the four Heemskirk deposits).

The Heemskirk Tin deposits are granite related cassiterite and base metal stockwork and replacement style mineralisation hosted in older sediments and volcaniclastics of the Zeehan Sub Basin, Western Tasmania. Mineralisation is generally stratabound.

Mineralisation in all the Heemskirk Tin Deposits remains open down dip and down plunge, with Stellar drilling at Heemskirk to extend mineralisation and further improve the geological model.

Numerous Pb-Zn-Ag fissure lodes are associated with the periphery of the mineralizing system. Mineralisation is essentially stratabound controlled by northeast plunging fold structures associated with northwest trending faults. Tin is believed to be sourced from a granite intrusion located over 1km from surface below the deposit.

Dimensions
Severn deposit is a north trending moderate to steeply east dipping and north plunging stratabound deposit. Comprised of 3 main lenses of mineralisation in a broader sulphide halo. Strike extending north over 500m, width 3-50m and down dip extent over 700m. There are some mineralized intersections below the 3 main zones which have not been included in the MRE as they have only been intersected in a few holes.

Queen Hill is a north trending moderate to steeply east dipping and north plunging stratabound deposit. Comprised of multiple mineralised structures in a broader sulphide halo. Strike extending north over 450m, width 2-30m and down plunge extent over 500m. Fracture and stratabound basemetal veining increasing towards the top of the deposit.

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

CommodityUnitsLOM
Tin t 22,818 *
All production numbers are expressed as metal in concentrate. * According to 2024 study.

Operational metrics

Metrics
Annual ore mining rate  ....  Subscribe
Annual processing rate  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
Tonnes processed, LOM  ....  Subscribe
* According to 2024 study.

Production Costs

CommodityUnitsAverage
All-in sustaining costs (AISC) Tin USD  ....  Subscribe
Assumed price Tin USD  ....  Subscribe
* According to 2024 study / presentation.

Operating Costs

CurrencyAverage
UG mining costs ($/t milled) AUD  ....  Subscribe
Processing costs ($/t milled) AUD  ....  Subscribe
* According to 2024 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Working capital $M AUD  ......  Subscribe
UG OpEx $M AUD  ......  Subscribe
Processing OpEx $M AUD 169
Refining and transportation $M AUD  ......  Subscribe
Royalty payments $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
Operating margin, %  ......  Subscribe
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 8% $M AUD  ......  Subscribe
After-tax NPV @ 8% $M AUD  ......  Subscribe
Pre-tax IRR, %  ......  Subscribe
After-tax IRR, %  ......  Subscribe
Pre-tax payback period, years  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 21, 2026
....................... Subscription required ....................... Subscription required Subscription required Jan 21, 2026

Workforce

Aerial view:

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