News

Petratherm Limited (ASX: PTR) has announced exceptional initial results from its April drilling campaign at the Rosewood heavy mineral sands (HMS) prospect, part of the Muckanippie Project in South Australia's northern Gawler Craton.

The first 10 holes returned some of the highest-grade heavy mineral intercepts to date, extending the mineralised zone a further 1.6km northwards. This marks a major advancement, pushing the confirmed mineralised corridor at Rosewood East to at least 3.6km in length, with mineralisation still open to the north.

Key intercepts include:

• 26m @ 17.2% HM from 7m, including 6m @ 36.4% HM (25RW002)

• 32m @ 11.1% HM from 10m, including 3m @ 22.7% HM (25RW003)

• 15m @ 11.5% HM from 6m, including 5m @ 20.9% HM (25RW004)

• 8m @ 13.1% HM from 6m, including 4m @ 20.5% HM at the northernmost hole (25RW010)

Importantly, these results build on previous success, further confirming widespread, shallow, high-grade mineralisation across a footprint now exceeding 15km².

Petratherm CEO, Peter Reid, noted:

“These results highlight the impressive scale and continuity of high-grade mineralisation at Rosewood. We look forward to the remaining 63 assays from Phase 2 and initiating the next phase of step-out drilling in coming weeks.”

Bulk sampling and metallurgical test work are underway to assess the project’s commercial potential, with initial product generation expected soon.

The Muckanippie Project is emerging as a standout HMS discovery, with Petratherm’s aggressive exploration strategy delivering strong early success in its search for titanium-rich heavy mineral sands.

Meeka Metals Limited (ASX: MEK) has delivered another set of strong drilling results from its Turnberry deposit within the Murchison Gold Project, WA. The company has intersected shallow, high-grade gold south of the existing Stage 1 Turnberry Central open pit, reinforcing the project's growth potential.

Key highlights from the recent RC drilling program include:

• 10m @ 5.20g/t Au from 37m, including 2m @ 23.23g/t Au (25TBRC009)

• 1m @ 15.83g/t Au from 61m

• 16m @ 1.39g/t Au from 34m, including 7m @ 2.25g/t Au

• 5m @ 2.68g/t Au from 55m, including 1m @ 10.33g/t Au

These results extend mineralisation 200m south of the current pit and highlight the potential to expand Meeka’s production plans. The new data will feed into an ongoing re-evaluation of the Stage 1 pit design, which may now extend beyond the originally planned ~2 years.

Drilling is continuing at Turnberry South, where a new ore zone was recently defined. The company remains on track to commission its processing plant in June 2025, with first gold production targeted shortly after.

Managing Director Tim Davidson commented, “It is apparent from the broad zones of shallow high-grade gold in this drilling that we have far more oxide gold than contemplated in the DFS. It highlights the opportunity to organically grow the production plan.”

Meeka’s Murchison Gold Project hosts a 1.2Moz resource and is fully permitted, with open pit mining underway and site infrastructure nearing completion.

Rox Resources Limited (ASX: RXL) has released a promising drilling update from its flagship Youanmi Gold Project in Western Australia, with recent results confirming the continuation of high-grade gold mineralisation across multiple deposits.

The recently completed 35,000-metre Step-up drilling program has delivered a series of strong assay results, with standout intercepts including:

• RXDD203: 11.90m @ 4.37g/t Au from 451.0m and 1.96m @ 17.13g/t Au from 471.9m (Youanmi Main)

• RXDD190: 6.73m @ 6.66g/t Au from 447.3m (Youanmi Main)

• RXRC569: 5.00m @ 5.33g/t Au from 53.0m (Interceptor)

• RXDD205: 14.77m @ 1.33g/t Au from 407.2m and 1.00m @ 9.92g/t Au from 434.0m (United North)

The program aimed to grow near-mine resources and upgrade inferred mineralisation in support of the upcoming Definitive Feasibility Study (DFS), which remains on track for release in July 2025.

Rox Resources Managing Director & CEO, Mr Phillip Wilding, stated:

“The Step-up drill program has been highly successful in increasing our understanding of the Youanmi ore system. These results affirm the high-grade nature of the deposit and support the case for advancing to development and production.”

Ongoing activities at Youanmi include:

• Two diamond rigs targeting extensions at Youanmi North, United North, Pollard and Prospect

• Progress on dewatering infrastructure to enable decline access to underground development

• Completion of metallurgical test work, with Albion Process™ testing underway

• Preparations for updated Mineral Resource Estimate (MRE) and environmental approvals

Rox continues to build momentum as it advances towards re-establishing mining operations at Youanmi, a historically high-grade gold producer with strong infrastructure already in place.

23 May 2025 | West Perth, WA – Great Boulder Resources (ASX:GBR) has confirmed a new gold discovery at Side Well South and extended the Eaglehawk deposit by another 200 metres, highlighting the growing potential of the company’s flagship Side Well Gold Project near Meekatharra.

Key RC intercepts from Side Well South include:

• 14m @ 1.64g/t Au from 83m, including 4m @ 3.59g/t Au (25SWRC001)

• 19m @ 0.84g/t Au from 28m, including 5m @ 2.01g/t Au (25SWRC003)

• 8m @ 1.68g/t Au from 107m (25SWRC004)

Assays from 16 additional RC holes are pending. Meanwhile, AC drilling at Eaglehawk returned:

• 8m @ 2.19g/t Au from 60m, including 4m @ 4.23g/t Au (25SWAC137)

These results confirm primary mineralisation beneath recent AC hits and highlight further expansion potential across multiple trends.

Managing Director Andrew Paterson commented:

“It’s really exciting to see immediate progress at Side Well South and the extension at Eaglehawk. We’ve now confirmed primary gold in multiple new zones, and we’re only just beginning to test the broader system.”

Next steps:

• Completion of Phase 2 AC drilling at Side Well South

• RC follow-up at Ironbark (recent 8m @ 9.07g/t Au intercept)

• Regional geophysics and heritage clearance for the northern Central Corridor

• Scoping study for Ironbark on track for delivery this quarter

Great Boulder has also published a revised Exploration Target for Side Well totalling up to 1.1Moz, based on defined prospects across Mulga Bill, Eaglehawk, Ironbark, Saltbush and Side Well South.

22 May 2025 | West Perth, WA – Kali Metals (ASX:KM1) has expanded its Marble Bar Gold Project in the Pilbara by 28.8km² following the acquisition of exploration licence E45/6389, bringing the project’s total landholding to approximately 96km².

The newly acquired tenement sits directly along strike and immediately north of Kali’s existing 9.5km gold-in-soil anomaly, where previous rock chip sampling returned grades of up to 4.0g/t gold. Kali believes the mineralised trend extends into the new area and intends to begin exploration immediately, with heritage approvals already in place.

Managing Director Paul Adams commented:

“This acquisition not only consolidates our landholding but also significantly strengthens the exploration potential at Marble Bar. With gold prices recently reaching record highs, we’re maintaining a clear focus on advancing this highly prospective area.”

Kali also announced it has recently completed its most extensive surface sampling program to date, collecting 299 rock chip samples across the project. Assay results are expected in the coming weeks.

Acquisition Terms:

• $20,000 cash and scrip consideration (3.5M shares)

• Two deferred share payments tied to JORC resource milestones:

  • 100,000oz and 250,000oz gold at 0.5g/t cut-off within four years

The Marble Bar Project is strategically located near Calidus Resources’ Warrawoona/Klondyke operations and forms part of Kali’s broader gold and lithium portfolio across Australia’s key mineral belts.

22 May 2025 | South Perth, WA – Astral Resources (ASX:AAR) has delivered outstanding metallurgical results from its Feysville Gold Project, with gold recoveries of up to 98.1% confirmed from initial testwork at the Kamperman and Rogan Josh deposits. The results support the inclusion of these satellite deposits in the upcoming Mandilla Pre-Feasibility Study (PFS).

Five composite samples from Kamperman and two from Rogan Josh underwent gravity and cyanide leach testing. Three Kamperman samples returned an average recovery of 98.1%, confirming free-milling characteristics. The remaining two, which contained elevated copper, recorded 87.9% but are expected to improve with higher cyanide concentrations in follow-up tests.

Key Results:

• Kamperman: 3 samples averaged 98.1% recovery; 2 samples averaged 87.9% (high copper impact)

• Rogan Josh: 2 samples averaged 91.5% recovery at an average head grade of 0.70g/t Au

• Low reagent consumption and rapid leach kinetics across both deposits

Managing Director Marc Ducler stated:

“These results clearly demonstrate that the simple, low-cost processing route proposed for Mandilla will also suit ore from Kamperman and Rogan Josh. This is a key step toward incorporating Feysville into the broader Mandilla mine plan.”

The combined Feysville resources now total 5Mt @ 1.2g/t Au for 196koz, strengthening Astral’s consolidated Mineral Resource base of 1.76Moz.

Additional assay results from RC and aircore drilling at Feysville are due later this quarter, alongside ongoing in-fill and extensional drilling at the nearby Iris and Hestia deposits.

21 May 2025 | Alstonville, NSW – Polymetals Resources (ASX:POL) has confirmed that redevelopment of its Endeavor Silver-Zinc Mine is progressing on schedule and within budget, with commissioning well underway and first cash flow expected in June.

Following the completion of major site works and infrastructure upgrades, the site has entered full commissioning. Crushed ore is being hoisted and stockpiled, with wet commissioning of the plant in progress and ore processing scheduled to begin next week.

Key highlights:

• First ore crushed and hoisted to surface

• Over 40,000 tonnes of ore stockpiled underground

• Site targeting 65,000t/month processing rate in H2 2025

• First mining of high-grade silver ore set for July 2025

Executive Chairman Dave Sproule said:

“We’re proud of the rapid, in-house development at Endeavor — a rarely achieved feat at this scale. First processing is imminent, and our shareholders are seeing real value for money.”

In parallel, diamond drilling continues at the Carpark prospect, targeting extensions of the Main Lode. Results will be released once the current program is completed.

Polymetals is aiming to become a long-term base and precious metal producer from the Cobar Basin, with the Endeavor restart marking a critical milestone in that journey.

21 May 2025 | West Perth, WA – Yandal Resources (ASX:YRL) has confirmed broad zones of gold mineralisation at the Siona Discovery, part of its Ironstone Well-Barwidgee Project in WA’s northern Goldfields, and is now preparing to launch a major 12,500m aircore drilling program at the nearby Caladan prospect.

Diamond drilling at Siona returned:

• 16.3m @ 0.5g/t Au from 322.2m (25IWBRD0003)

• 29.1m @ 0.4g/t Au from 282.9m (25IWBRD0010)

• 6.4m @ 1.5g/t Au from 103.5m, including

  • 0.4m @ 12.7g/t Au (25IWBDD0009)

• 116m @ 1.0g/t Au from 97m (24IWBRD0039 – RC + diamond tail)

These results build on the broad, low-grade halo with internal high-grade zones identified in earlier RC drilling. Geological modelling suggests gold mineralisation is controlled by deformation along and within the New England Granite intrusion.

Managing Director Chris Oorschot said:

“We’re now armed with a much clearer understanding of the Siona system. With the full extent of the granite under Yandal’s control, we’re shifting focus to testing new structural targets that could deliver larger-scale discoveries.”

Next steps:

• Caladan aircore drilling begins late May

• Follow-up aircore at Salusa and other New England Granite (NEG) targets

• Heritage surveys scheduled for late May / early June

• RC drilling to resume post-aircore to test deeper high-grade trends at Siona

Yandal sees the NEG as a regional-scale gold system, with visible gold, strong alteration, and favourable structural controls now confirmed through diamond drilling.

21 May 2025 | West Perth, WA – Rox Resources (ASX:RXL) has achieved a major milestone in its metallurgical test work, confirming gold recoveries of 91.6% to concentrate from samples at its flagship Youanmi Gold Project in WA’s Mid West.

Conducted as part of the Definitive Feasibility Study (DFS), bulk flotation tests also returned concentrate grades of 49.9g/t Au, with up to 62.6% additional gold recoverable from tailings via cyanide leach. Test work using the Albion Process™ is now underway to optimise overall recovery.

Key Results:

• 91.6% gold and 98.3% sulphur recovery to concentrate

• Tailings leach recovery: 35.8–62.6%, with low reagent use

• Albion Process™ to improve recovery from semi-refractory ores

• Final gold recoveries expected to exceed PFS assumptions

Managing Director Phillip Wilding commented:

“It’s exciting to see recoveries exceeding our Pre-Feasibility Study expectations. The Albion Process could deliver further upside while lowering processing costs, supporting a compelling case for development.”

The metallurgical program, which began in January, will feed directly into Rox’s DFS due in November 2025. The work covers the major ore lithologies that comprise over 95% of the planned plant feed and is key to optimising the process flowsheet.

Additional dewatering, approvals, and resource updates are progressing in parallel as Rox works toward a production decision.

21 May 2025 | Mt Hawthorn, WA – Tempest Minerals (ASX:TEM) has significantly expanded the surface footprint of its Sanity gold anomaly at the Yalgoo Project in Western Australia, following results from a tighter-spaced geochemical sampling program.

Soil sampling on a 100m x 100m grid returned up to 294ppb gold, outlining a stronger and more coherent anomaly adjacent to historical mine workings. The Sanity prospect continues to build as a compelling target for future drilling.

Key Highlights:

• Peak soil value: 294ppb Au, with a strong gold-silver geochemical correlation

• Rock chips nearby returned up to 7g/t gold, 0.2% copper, and >60% iron

• Geophysical data highlights a coincident magnetic anomaly and structural distortion

• Over 200 samples define a robust multi-element geochemical anomaly

Next Steps:

• Assess results within regional geological context

• Advance approvals and develop geological models

• Plan for drilling and further mapping, geophysics, and sampling

Managing Director Don Smith commented:

“The expansion of the Sanity anomaly adds weight to the prospectivity of the Yalgoo Project. This is a clear example of our data-driven approach delivering strong regional targets ready for drill testing.”

Tempest controls more than 1,000km² in the Yalgoo region, and Sanity joins a growing list of prospects alongside the 2024 Remorse magnetite discovery.