Maiden Ore Reserve – Wonawinta Silver Mine

Manuka Resources Limited (“Manuka” or the “Company”) is pleased to announce a Maiden Ore Reserve (under its ownership) of the Wonawinta Silver Mine (“Wonawinta” or the “Project”), located 80km due south of Cobar in New South Wales (Figure 1). The Ore Reserve and associated Implementation Plan provides the Company with a clear production pipeline and pathway toward a dual precious metals revenue stream from two operating assets in the Cobar basin, namely Mt Boppy Gold Mine and Wonawinta.

Highlights

• The Wonawinta Silver Mine and Processing plant is a highly strategic asset located within the prolific Cobar Basin, NSW, and owned 100% by Manuka Resources Limited.
• Wonawinta is the only primary silver Reserve in Australia with all mining approvals current and intact, and process plant fully constructed - Wonawinta was producing silver for Manuka as recently as late 2022.
• Ore Reserve of 4.8Mt¹ at 53.8g/t Ag containing 8.4Moz of silver comprising:
  • Proved Ore Reserves of 0.8Mt at 50.8g/t Ag; and
  • Probable Ore Reserves of 4.1Mt at 54.3g/t Ag.
• Ore Reserve is based solely on shallow (<40m deep) oxide material.
• Total Wonawinta Resource comprises 38.3Mt at 41.3g/t Ag for 51Moz of silver (ASX release 1 April 2021).
• The Ore Reserve and associated Implementation Plan will be used to assess the potential to take Wonawinta out of active care & maintenance and recommence silver production.
• Manuka is currently focused on the restart of a high-margin operation at its 100% owned Mt Boppy Gold Project located 50km east of Cobar and progressing approvals for its world-class vanadium rich irons sand project located in the Southern Taranaki Bight, New Zealand.

Manuka’s Executive Chairman, Dennis Karp, commented:

“Manuka’s Maiden Silver Ore Reserve and the preparation of an Implementation Plan for Wonawinta represents a major milestone for the Company and supports a potential of restarting silver mining and processing operations in the future. Our process plant at Wonawinta has been kept in excellent condition and on active care & maintenance since the processing of gold from stockpiles hauled from Mt Boppy, ceased in February 2024 and therefore stands ready to come back online at short notice.

The prospect of restarting Wonawinta provides the Company with excellent optionality on silver and the potential to take advantage of the very buoyant precious metals prices and broader strategic opportunities within the Cobar Basin. We look forward to providing further updates to the market as our strategy progresses.

Summary

Wonawinta was built by Cobar Consolidated Resources (“CCR”) in 2011 and acquired by Manuka in 2016. The Project comprises a granted mining lease, existing open pits mines, an existing 1Mtpa CIL process plant and associated infrastructure including approved tailings dams and accommodation facilities (Figures 2 – 4). Whilst limited silver production was undertaken by Manuka in 2022, the Wonawinta plant has primarily, and as recently as December 2023, been used by Manuka to produce gold doré from ore hauled from the Mt Boppy gold mine.

Figure 1: Location of Manuka’s Wonawinta and Mt Boppy Projects within the Cobar basin.

Figure 2: Overview of the Wonawinta Mine Site.

Figure 3: Existing Manuka Open Pit

Figure 4: The existing Wonawinta CIL Processing Plant

The current Implementation Plan proposes the mining and processing of 4.8Mt of Ore at a grade of 54g/t Ag over 4.5 years for the recovery of 5.8Moz of silver. Capital Costs for taking the mine out of care & maintenance and recommence production are estimated to be A$3.7M plus A$12.4M in pre-strip mining. Based on the current silver forward curve and an All-In Sustaining Cost of A$40.51/oz, the mine plan would deliver operating cash flows of ~A$100M based on the Ore Reserve alone.

As the price and demand outlook for silver continues to develop, Manuka will continue to refine its economic model for the Project and look to further optimise the mining schedule and reduce pre-production mining costs ahead of a decision to commence the restart of operations.

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