WA Mining Weekly April 20-26

This Week’s Big Stories

The Potash Phoenix: Lake Way Assets Shifted to New SO4 Entity

A 45-tenement block totalling 54,165 hectares moved this week from Piper Preston Pty Ltd to SO4 Pty Ltd — the single largest administrative transfer to hit the Goldfields registry in recent memory. Industry veterans will recognise Piper Preston as the legacy operating shell of Salt Lake Potash, which collapsed into administration in October 2021 and stranded the near-complete Lake Way project. After roughly a year in purgatory, Sev.en Global Investments acquired the Lake Way project subsidiaries out of receivership in late 2022, and the ground is now being formally migrated to the newly minted SO4 Pty Ltd entity. The timing is deliberate: DMIRS registry records indicate SO4 achieved its first SOP production from the project in 2024, meaning the recapitalisation has moved from balance-sheet repair into operational reality. Stripping the legacy corporate shell away from the producing asset is textbook post-receivership hygiene — it cleans the title chain, simplifies future financing conversations, and draws a hard line under the insolvency era. With that housekeeping done, Sev.en’s focus shifts squarely to ramping Lake Way toward its stated target of up to 245,000 tonnes of sulphate of potash per annum. For anyone tracking Goldfields potash, the areas around L53/215, M53/123 and E53/2373 is the one to watch on the map as production momentum builds.

Greatland Feeds the Telfer Beast with Rio Tinto Ground

Greatland Paterson South Pty Ltd absorbed six tenements totalling 74,710 hectares from Rio Tinto Exploration this week, executing the next phase of a profound power shift in the Paterson Province. The transfer is the physical manifestation of the May 2023 farm-in agreement, under which Greatland committed $21.1 million to earn up to 75% of Rio’s under-explored regional tenure. But the strategic calculus has shifted materially since that deal was inked. Greatland is finalising a $475 million buyout of Newmont’s 70% stake in the Havieron deposit and 100% of the Telfer processing hub — a transaction that transforms the company from explorer to mill operator overnight. With Telfer entirely in-house, this Rio Tinto ground is no longer just a farm-in play; it is critical pipeline feed for a hungry, newly acquired processing beast. The Havieron deposit sits approximately 45 kilometres from the Telfer plant, and industry context suggests the Paterson South tenure is being positioned to explore for supplementary regional ore to maximise mill utilisation across multiple decades. Rio’s neglect of this ground is Greatland’s opportunity — pegging it now, before a Havieron production ramp validates the district, is the kind of optionality that looks cheap in hindsight. E45/5351 is the representative block to anchor on the map.

Delta’s Gascoyne Grab: Electrostate Absorbs ERL Tenure

Electrostate Malinda Pty Ltd swept up 15 tenements covering 155,000 hectares from ERL (Aust) Pty Ltd this week, the latest and largest consolidation move in Delta Lithium’s methodical Gascoyne land assembly. DMPE registry records confirm Electrostate Malinda as the wholly owned Delta subsidiary holding the flagship Yinnetharra Lithium Project, making this transfer a direct extension of the company’s core position. Delta has been deploying capital aggressively across the region, executing joint ventures with Voltaic Strategic Resources and Reach Resources and paying $4.5 million in upfront consideration to expand its footprint around the Malinda maiden resource. The ERL acquisition mirrors the logic of their earlier 15-licence Aston Project pickup — systematically eliminating junior fragmentation along the Leake Springs Metamorphics rather than leaving gaps that could complicate future resource definition or attract competing consolidators. The thesis is straightforward: in an emerging lithium district, whoever controls the stratigraphy controls the timeline. By hoovering up legacy tenure from holders like ERL before the Gascoyne gets a re-rating, Delta is betting that unified control of this metamorphic package will be the structural advantage that separates a world-class, long-life operation from a collection of disconnected drill plays. E09/2967 is the anchor tenement for mapping this position.

Contested Ground

6 New Applications in Yilgarn Mineral Field

Forrestania Resources Limited, Dianne Elizabeth Allen, and Jake Thomas Larsen lodged 6 new applications for mining tenements in the Yilgarn mineral field.

5 New Applications in East Murchison Mineral Field

Avenira Gold Pty Ltd, Yandal Resources Limited, and Westar Graphite Pty Ltd lodged 5 new applications for mining tenements in the East Murchison mineral field.

4 New Applications in North Coolgardie Mineral Field

Resource Mining Pty Ltd, Yerilla Nickel Pty Ltd, and Joseph Robert Bradley lodged 4 new applications for mining tenements in the North Coolgardie mineral field.

4 New Applications in Pilbara Mineral Field

Aventine Resources Pty Ltd and Greatland Exploration Pty Ltd lodged 4 new applications for mining tenements in the Pilbara mineral field.

Ground Set to Expire This Week

Live tenements expiring in the next 7 days with no renewal applied for:

Regis Resources expiring 4,900 ha at Mt. Margaret

Major holder Regis Resources Limited is letting 4,900 hectares in the Mt. Margaret mineral field expire on 2026-05-01.

Golden Mile Resources expiring 10,780 ha in Yalgoo

Mid-tier holder Golden Mile Resources Ltd is relinquishing 10,780 hectares in the Yalgoo M.F. on 2026-04-29.

Golden Mile Resources expiring 9,996 ha in Yalgoo

Mid-tier holder Golden Mile Resources Ltd is letting 9,996 hectares in the Yalgoo M.F. expire on 2026-04-29.

Medallion Metals expiring 4,900 ha in Phillips River

Mid-tier holder Medallion Metals Limited is dropping 4,900 hectares in the Phillips River M.F. on 2026-05-03.

Gascoyne Metals expiring 2,352 ha in Gascoyne

Mid-tier holder Gascoyne Metals Pty Ltd is letting 2,352 hectares in the Gascoyne M.F. expire on 2026-05-03.

Carnegie Gold expiring 2,156 ha at Kunanalling

Mid-tier holder Carnegie Gold Pty Ltd is relinquishing 2,156 hectares in the Kunanalling mineral field on 2026-05-01.

Image Resources expiring 2,156 ha in South West

Mid-tier holder Image Resources NL is letting 2,156 hectares in the South West M.F. expire on 2026-05-01.

Siberia Mining expiring 1,960 ha at Kunanalling

Mid-tier holder Siberia Mining Corporation Pty Ltd is dropping 1,960 hectares in the Kunanalling mineral field on 2026-04-28.

Image Resources expiring 1,176 ha in South West

Mid-tier holder Image Resources NL is relinquishing 1,176 hectares in the South West M.F. on 2026-04-28.

Halls Creek Mining expiring 1,176 ha in Kimberley

Mid-tier holder Halls Creek Mining Pty Ltd is letting 1,176 hectares in the Kimberley M.F. expire on 2026-05-05.

Disclaimer

Tenement expiry dates, applications, transfers, and status changes are based on currently available data and may not reflect real-time outcomes. There is often a 4–6 week delay for Department of Mines, Petroleum and Exploration to process, lodge, and gazette dealings, meaning ground referenced as “expiring”, “relinquished”, or “transferred” may already have been renewed, surrendered, amended, or otherwise dealt with but not yet publicly reflected.

This information is provided for general informational purposes only and does not constitute a definitive statement of tenement status, ownership, or availability. Coverage is not exhaustive. No guarantee is given that ground identified will become available, or as to the timing of any such availability. Users should verify all tenement details and dealings directly with official government sources before making any commercial or exploration decisions.

All commentary and interpretations are based on public data and are subject to change as new information becomes available.

Live spatial overlays highlighting tenement drops and upcoming compulsory or voluntary surrenders are available on NextMaps, derived from the MTO dealings feed and the DASC.