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Australia

Windarra Gold Project

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Australia

Windarra Gold Project

Location: 21 km NW from Laverton, Western Australia, Australia

Project Contacts:

Level 1 3 Ord Street
West Perth
Western Australia, Australia
6005

Contacts:

Additional Resources for Suppliers & Investors

Categories

Summary

Mine TypeTailings
Study CompletedFeasibility
Study in ProgressFeasibility Update
StagePermitting
Commodities
  • Gold
  • Silver
Mining Method
  • Hydraulic mining
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotThe Windarra Gold Tailings Project comprises the Windarra Gold Tailings Mineral Resource and the Lancefield Gold Tailings Mineral Resource.

On July 31, 2024, Poseidon Nickel Ltd. entered an agreement with Encore Minerals to develop the Windarra Gold and Nickel Tailings using proprietary Glycine Leaching Technology. Encore Minerals is responsible for the funding, development, operation, closure and rehabilitation of the Windarra tailings project.

Encore Minerals is progressing with feasibility studies based on using GLT and other patented technology to process the gold tailings at Windarra and Lancefield. Outcomes from these studies will support potential development of the project.

Next Steps
Encore Minerals is progressing with feasibility studies based on using GLT to process the gold tailings at Windarra and Lancefield. Outcomes from these studies will support potential development of the project.

Owners

SourceSource
CompanyInterestOwnership
Horizon Minerals Ltd. 100 % Indirect
Poseidon Nickel Limited has tenure over the Windarra Gold Tailings (North and South Dams), which are contained within the much larger Mining Lease M261SA, owned by Poseidon Nickel Limited.

Poseidon Nickel Limited (ASX: POS) (POS or Poseidon) and Horizon Minerals Limited (ASX: HRZ) (HRZ or Horizon) refer to the announcement on 10 February 2025 regarding the lodgement of orders of the Supreme Court of Western Australia with the Australian Securities and Investments Commission approving the proposed merger between Horizon and Poseidon by way of schemes of arrangement under the Corporations Act 2001 (Cth), whereby Horizon acquired 100% of the fully paid ordinary shares in Poseidon and 100% of the options in POS under the code “POSAAB”.

Contractors

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SourceSource

Deposit type

  • Tailings

Summary:

Between 1981 and 1994, approximately 5.1 Mt of gold ore was treated at an average head grade of 5.1 g/t gold producing over 700,000 ounces of gold at a recovery of 84.2%. The gold tailings were isolated from the nickel tailings and deposited initially in the South dam and then the North dam from 1988. The North dam contains approximately 80% of the gold tailings tonnage. A minor proportion of gold tailings was deposited on top of the Central dam to assist with capping the nickel tailings prior to rehabilitation of the Central dam.

Poseidon is considering development of the Windarra Gold Tailings Project, which comprises the Windarra Gold Tailings Mineral Resource contained within the North and South tailings dams (Windarra) and the Lancefield Gold Tailings Mineral Resource contained on License To Treat (LTT) tenement 700-3709 (Lancefield). The Mineral Resource comprises 4.75 Mt at the Windarra North and South dams at an average grade of 0.73 g/t gold and 1.21 Mt at Lancefield at an average grade of 1.27 g/t gold, all classified as Indicated resources. There is a total of approximately 161,000 ounces of gold contained within the Project Mineral Resource at Indicated classification. The Project also has access to an additional 0.38 Mt at an average grade of 1.20 g/t gold at Lancefield currently classified as an Inferred resource. With additional resource definition drilling it is considered likely this material would be reclassified to an Indicated resource also.

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

CommodityUnitsLOM
Gold oz 53,490
Silver oz 136,947
All production numbers are expressed as metal in doré.

Operational metrics

Metrics
Hourly processing rate  ....  Subscribe
Annual processing capacity  ....  Subscribe
* According to 2021 study.

Production Costs

CommodityAverage
All-in sustaining costs (AISC) Gold  ....  Subscribe
C1 cash costs Gold  ....  Subscribe
All-in costs Gold  ....  Subscribe
Assumed price Silver  ....  Subscribe
Assumed price Gold  ....  Subscribe
* According to 2021 study / presentation.

Operating Costs

CurrencyAverage
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 2021 study.

Project Costs

MetricsUnitsLOM Total
Closure costs $M AUD  ......  Subscribe
Total CapEx $M AUD  ......  Subscribe
OP OpEx $M AUD  ......  Subscribe
Processing OpEx $M AUD 45.6
G&A costs $M AUD 5.5
Total OpEx $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 8% $M AUD  ......  Subscribe
Pre-tax IRR, %  ......  Subscribe
Pre-tax payback period, years  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 11, 2024
....................... Subscription required ....................... Subscription required Subscription required Dec 9, 2024

Workforce

Aerial view:

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