Who made the gains in June? Here are the top ASX resources winners

• Resolution Minerals the top mover among ASX resources stocks with US antimony buy
• Eclipse Minerals and Olympio Metals also make the podium
• Gold, copper and rare earths the hot commodities top 50 explorers are chasing

Gold, copper and rare earths resource stocks stole the spotlight in June, with the biggest individual gainer Resolution Minerals (ASX:RML) up a whopping 206%.

The precious metal player announced it was acquiring a drill-ready antimony, gold and tungsten project in the Stibnite mining district of Idaho – next to the largest known antimony resource in the USA.

The company’s new Horse Heaven project shares its eastern boundary with A$2bn market capped Perpetua Resources and its Stibnite gold-antimony project, which hosts a 4.8Moz gold reserve and a 148Mlb antimony reserve.

(Gold and antimony are often found together, with antimony often mined as a by-product.)

Horse Heaven has strong gold, antimony and silver mineralisation in two prospects, includes past-producing antimony and tungsten mines and has previously reported rock chip results of up to 5.99g/t gold, 367g/t silver and 19.15% antimony, with past drilling returning up to 1.459g/t gold.

RML said the brownfields project was a transformational acquisition, with the highly encouraging past results indicating large tonnage mining potential.

The company also said Horse Heaven complemented its recently acquired Australian gold-antimony-copper projects – Drake East antimony-gold project (NSW), Neardie antimony project (Qld) and Spur South gold-copper project (NSW) – to create a portfolio highly leveraged to gold and antimony.

Drilling is planned to begin in August.

Rare earths a very close second

Rare earths explorer Eclipse Metals (ASX:EPM) was a close second, reporting a 200% gain in June after announcing high-value, coarse-grained rare earths at its Grønnedal project in Greenland, as it seeks to position the company as a strategically important and globally significant source of REE.

A mineralogical study highlighted the presence of high-value rare earth minerals, including Synchysite, Bastnasite and Monazite – highly sought-after hosts of magnet rare earth elements (Nd, Pr, Dy, Tb).

It also returned significantly elevated niobium grades, ranging from <40ppm to 4670ppm, and yttrium values ranging from 39ppm to 777ppm.

Both elements are increasingly sought after for superconductors, defence alloys, and advanced electronics, further elevating Grønnedal’s importance within the global critical minerals ecosystem.

The company also reported the minerals were coarse and grain sized, with up to 54% liberation, supporting low-cost, conventional flotation pathways like those successfully applied at other globally recognised REE operations, including Mountain Pass (USA) and Mount Weld (Australia).

The next step is metallurgical and process design work, with the company confident of the project’s strong economics in a tier-1 location with deep-water access and no uranium permitting constraints.

Another goldie takes third place

And finally, Olympio Metals (ASX:OLY) took third place, up 161% for the month off the back of maiden drilling at its Bousquet gold project in Canada which saw visible gold observed in the very first drill hole.

Bousquet is in Quebec, Canada on the Cadillac Break, a regional structure associated with world-class gold mineralisation which has seen more than 110Moz of gold produced.

The visible gold was in the first hole of the maiden drill program at the Paquin prospect and returned numerous high-grade historical intercepts, including 9m at 16.96g/t Au.

The hole will be logged and sampled with priority and submitted for assay, with results expected to be available by mid-July.

“The Bousquet project is perfectly positioned for gold exploration success, having multi-million-ounce gold deposits to the east and west along the Cadillac Break with year-round access for drilling,” MD Sean Delaney said.

What commodities were the top gainers hunting in July?

Here are the top 50 ASX resources stocks for the month of July>>>

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Small Cap Standouts

GBM Resources (ASX:GBZ)

The company reported new and existing institutional and sophisticated investors supported a placement to the tune of $13 million, as it refocuses on unlocking the district-scale gold potential in Queensland’s Drummond Basin.

Firm commitments have been received by GBZ to raise A$13m in a two-tranche placement at 0.6c per share.

New major shareholder Ian Middlemas has subscribed for shares valued at A$1.2 million under the placement and will become non-executive chairman of GBM.

The placement forms part of a broader recapitalisation of GBM, which includes:

• Full repayment of Collins St Asset Management Pty Ltd’s Convertible Notes of $6.2 million;
• Termination of the proposed farm-in agreement over the Twin Hills gold project with Wise Walkers Ltd (WWL); and
• A board restructure.

At completion, GBM will be well-funded and debt free to undertake an accelerated exploration program across its 100%-owned Drummond Basin portfolio, including Twin Hills and Yandan projects, which collectively host JORC mineral resources of 1.84Moz of gold.

The recapitalisation has seen GBM reach an agreement with WWL to terminate the proposed Twin Hills farm-in agreement, reconsolidating full ownership of its highly prospective Twin Hills asset.

WWL has committed to subscribe for $2 million under the placement and will also convert the $2 million previously spent under the farm-In into equity, resulting in a 19.99% shareholding in GBM.

“With a strong debt-free balance sheet, GBM now has a great opportunity to deliver value to shareholders through an accelerated exploration program across Twin Hills and Yandan,” GBM’s executive director Andrew Krelle said.

“GBM’s exploration plan for the next 12 months is designed to expand the significant gold resource base at Twin Hills and Yandan by systematically exploring for epithermal gold mineralisation across GBM’s Drummond Basin projects.”

FMR Resources (ASX:FMR)

FMR has secured the right to earn a majority interest in a prospective copper-gold-molybdenite porphyry project in Chile, entering into a conditional binding term sheet giving it the right to earn up to a 60% interest in the project with a large porphyry target untested at depth.

It will joint venture into selected tenements within the Llahuin Project held by Southern Hemisphere Mining (ASX:SUH), which overlie the Southern Porphyry target.

With proven fertility along a ~6km corridor at Llahuin, including historical shallow copper porphyry mineralisation directly above the target, this delivers FMR drill-ready targets for Q4 2025.

The Southern Porphyry JV tenement package will complement the company’s Fairfield and Fintry projects in Canada, which are prospective for copper and rare earth elements.

Providing impetus for the acquisition and exploration plans, the company has received firm commitments for a $2.2m capital raising at 16c through a placement to existing and new sophisticated investors.

This has seen renowned resources investor and successful explorer Mark Creasy welcomed to the register as a major shareholder.

Creasy is a highly supportive shareholder with an enviable record of exploration discovery and value creation over multiple decades.

Black Canyon (ASX:BCA)

Australian manganese explorer and developer, Black Canyon has acquired 100% of Ndalamo Platinum, which holds key tenement applications south and north of the compamny’s Wandanya manganese discovery.

The tenement package adds a further 229km² to the company’s manganese portfolio in the eastern Pilbara, complementing the existing existing large tonnage shale hosted manganese discoveries within the Balfour Manganese Field (BMF).

“The acquisition includes two key applications for licenses immediately south and north of the Wandanya discovery where the prospective manganese enriched stratigraphic horizon continues to outcrop onto the southern Ndalamo tenement for a further 300m to 400m,” MD Brendan Cummins said.

“The Company has already mapped outcropping manganese mineralisation over 3km of strike at Wandanya and with the addition of the Ndalamo tenement to the south we can add a further 300m to 400m of strike which further enhances the scale potential of this manganese discovery.”

Plus, the company wrapped up 3000m of RC drilling during the month which aimed to follow up high-grade manganese assays from previous drilling and rock chip samples along 1.5km of the 3km of strike including:

• 5m at 31.1% manganese from surface, including 2m at 42% manganese,
• 6m at 29.6% manganese from surface, including 3m at 41.0% manganese; and
• 5m at 32.4% manganese from 3m, including 3m at 40.1% manganese.

Previously reported iron ore assays included 64.3%, 62.4%, 58.8%, 58.6%, 63.3%, 63.1 and 57.6%.

Assay results from the drill program are expected through July and August.

MTM Critical Metals (ASX:MTM)

The company fielded some strong antimony recoveries this month from US e-waste using its proprietary Flash Joule Heating technology.

A recovery of 98% of the critical mineral was achieved, and 3.13% antimony was extracted from printed circuit board feedstock, with the grade far exceeding that of typical mined ore.

Even China’s largest antimony deposits — which dominate global supply — average just 0.5% to 0.7% antimony, making e-waste a vastly richer and largely untapped alternative.

The material had been thermally pre-processed to strip out plastics and volatiles, producing a dense, metal-rich carbon-based residue.

MTM Critical Metals, which will be renamed Metallium and completed a recent $50m placement to accelerate its timeline to commercial operations, views the results as clear proof of the technical strength and strategic promise of its Flash Joule Heating technology for recovering critical metals from e-waste.

Flash Joule Heating works by passing an electric current through metal-bearing material, rapidly elevating its temperature to more than 3000 degrees kelvin.

This vaporises the target metals as chlorides in seconds and collects the vapours for refining.

“This result demonstrates the strong technical and commercial potential of our FJH process for recovering strategic metals from e-waste,” MTM managing director and CEO Michael Walshe said, adding:

“Achieving 98% recovery of antimony at over 3% grade, from domestic urban feedstock, is particularly significant given the US currently has no meaningful domestic Sb production.

“With antimony designated as a critical metal by both the DoD and DoE, these outcomes reinforce MTM’s ability to contribute to onshore supply solutions for high-priority metals. “Combined with our recently secured, pre-permitted demonstration site in Texas, we are well positioned to scale operations and advance commercial deployment.

“In parallel, the company is engaging with US government agencies, including the DoD and DoE, regarding potential funding to support domestic critical metal recovery.

“While early-stage and non-binding, these discussions reflect strong interest in scalable US-based refining technologies.

“The strategic role of antimony in defence, particularly in armour-piercing alloys and flame-retardant systems, was a consistent theme during recent meetings in Washington.”

Antimony is an essential metal for munitions, semiconductors, batteries and flame retardants, yet the US lacks meaningful domestic production and depends heavily on imports from China.

The company has locked in more than 1100 tonnes per year of e-waste feedstock under agreements with US suppliers, providing a strong foundation for commercial deployment.

Plus, MTM also announced an MoU in June with Meteoric Resources (ASX:MEI)  to collaborate on downstream rare earths processing of mixed rare earth carbonate from Meteoric’s Caldeira project in Brazil – proving its tech has applications across a range of minerals.

Sunrise Energy Metals (ASX:SRL)

SRL reported it had finalised a $6 million placement, launched a $1.5m share purchase plan with strong initial uptake and returned high-grade scandium assays returned from its flagship Syerston project in Central West NSW over the month.

More than half of the total 3574 assays have been received from 49 drill holes, indicating multiple new areas of continuous, high-grade mineralisation.

Significant intersections include:

• 7m at 884ppm Sc from 1m, including 3m at 1123ppm from 4m,
• 6m at 788ppm from 4m; and
• 13m at 743ppm from 6m.

Once complete and released, all results from the drilling will be incorporated into an update to the Syerston resource estimate, which will underpin a feasibility study update.

“Recent drill results have identified further zones of continuous, high-grade scandium mineralisation within our Sunrise Mining Lease and they remain open in multiple directions,” Sunrise Energy Metals managing director Sam Riggall said

”These zones will form the basis of an initial multi-decade mine plan for our Syerston Scandium Project Feasibility Study, targeting rapid, low-cost development and production options, supported by one of the largest and highest-grade scandium resources in the world.”

At Stockhead we tell it like it is. While Resolution Minerals and MTM Critical Metals are Stockhead advertisers, they did not sponsor this article.