Resolution Minerals Targets Critical Antimony at Horse Heaven Project

Antimony Gold Rush: Resolution Minerals Set to Tap Critical Mineral Supply

Resolution Minerals (ASX:RML) has announced a strategic move to capitalise on surging antimony prices and increasing critical mineral demand with its acquisition of the drill-ready Horse Heaven Antimony-Gold-Tungsten Project in Idaho, USA.

Prime Location in America's Critical Mineral Heartland

Resolution's newly acquired Horse Heaven Project sits directly adjacent to Perpetua Resources' Stibnite Gold Mine (NASDAQ: PPTA, ~A$2 billion market cap), positioning the company in a proven geological setting. The strategic location in Idaho's historic Stibnite Mining District gives Resolution Minerals Horse Heaven Project exposure to two highly prospective mineralised corridors containing antimony, gold, silver, and tungsten.

The timing appears advantageous, with antimony, tungsten, and gold all trading at record high prices as China tightens its grip on critical mineral exports. Antimony, which is classified as a critical mineral in both the US and Australia, is essential for military applications, flame retardants, and battery technology.

Executive Director Aharon Zaetz highlighted the potential significance of the acquisition: "The Board considers that the acquisition of the Horse Heaven Project has the potential to be a transformative event for RML. As many governments around the world look to onshore their supply of critical minerals, such as antimony and tungsten, we have secured a commanding ground position with known antimony occurrences and next to what is likely to become the largest antimony producer in the USA."

Two Advanced Drill-Ready Targets

The project features two primary targets with impressive mineralisation already identified:

1. Antimony Ridge Fault Zone (ARFZ)

• 1.2km strike length with gold-antimony-silver-tungsten mineralisation
• Standout rock chip samples include:
  • 3.68g/t gold, 303g/t silver and 2.72% antimony over 4m
  • 4.65g/t gold, 70.5g/t silver and 19.15% antimony over 1m
  • 5.99g/t gold, 246g/t silver and 0.71% antimony over 1m

2. Golden Gate Fault Zone (GGFZ)

• 3.5km strike length hosting significant gold mineralisation
• Previous drilling returned impressive intercepts:
  • 85.34m @ 0.937g/t Au (including 38.10m @ 1.459g/t Au)
  • 105.16m @ 0.787g/t Au (including 51.82m @ 0.990g/t Au)
  • 30.48m @ 1.354g/t Au

Both targets feature historical, non-JORC gold resources that highlight the project's potential scale:

• Golden Gate Hill: 216,000 ounces gold (7.25M tons at 0.93g/t)
• Antimony Hill: 70,000 ounces gold (3.17M tons at 0.69g/t)

The Critical Importance of Antimony

Antimony is a strategic metal with limited global supply but essential applications. As a critical mineral, it's vital for:

• Defence: Used in ammunition, night-vision devices, and armour-piercing bullets
• Flame Retardants: Essential for fire safety in electronics, textiles, and plastics
• Battery Technology: Component in lead-acid batteries and emerging grid storage solutions

With China controlling approximately 60% of global antimony production and supply chains facing increasing geopolitical pressure, Western countries are actively seeking domestic sources of this strategic metal. The Stibnite Gold Mine, once reopened, will be the only domestically mined source of antimony in the U.S., making Resolution's neighbouring position potentially valuable.

Understanding Antimony as a Critical Mineral

Antimony (chemical symbol Sb) is a silvery-white, brittle metallic element that belongs to the nitrogen group of the periodic table. It exists primarily in two forms: metallic antimony and antimony trioxide, with the latter accounting for most commercial applications.

The metal's significance stems from its unique properties:

• Heat Resistance: Antimony compounds can withstand high temperatures
• Flame Retardation: They disrupt combustion chemistry, helping materials resist burning
• Electrical Properties: Used to enhance performance in certain battery and electronic applications
• Strengthening Effects: When alloyed with lead, antimony increases hardness and mechanical strength

Global production totals approximately 150,000-170,000 tonnes annually, with China producing roughly 60-70% of this amount. Other producing countries include Russia, Tajikistan, and Bolivia, though in significantly smaller quantities.

The US and Australian governments have both designated antimony as a critical mineral due to:

1. Limited Domestic Production: Virtually no antimony is currently mined in either country
2. Supply Concentration: Heavy reliance on a single supplier (China)
3. Limited Substitutability: Few viable alternatives exist for many applications
4. Strategic Applications: Essential for military and defence purposes

Price volatility has been notable, with antimony prices increasing significantly over the past decade due to China's export restrictions and growing demand. Prices have ranged from $5,000 to over $15,000 per tonne depending on market conditions and purity levels.

A Well-Funded Path Forward

Resolution has secured a $1.9 million placement to fund exploration on this promising new asset. The company's 2025 exploration program includes:

• Completion of 3D modelling of existing CSAMT data
• Up to 6,000m of core drilling at Golden Gate
• Additional soil surveys at Antimony Ridge
• Metallurgical testing on Golden Gate core samples and tungsten ore from historic dumps
• Permitting for enhanced drill programs at both Antimony Ridge and Golden Gate

Ideal Timing for Critical Mineral Exposure

Resolution's entry into U.S. critical minerals comes at an opportune time. Executive Director Zaetz noted: "RML's entry into US critical minerals comes at a terrific time, with the market attributing huge premiums to ASX-listed companies operating in the space over the last 8 weeks, such as Dateline Resources (DTR), Trigg Minerals (TMG) and Locksley Resources (LKY) which have all seen significant re-ratings in recent weeks."

Why Investors Should Watch Resolution Minerals

Resolution Minerals presents a compelling investment case for those seeking exposure to critical minerals and precious metals:

1. Prime Location: Adjacent to a billion-dollar antimony-gold project in a mining-friendly jurisdiction
2. Ready to Drill: Advanced targets with historical resources and impressive historical drill results
3. Critical Mineral Exposure: Direct exposure to antimony, a critical mineral with supply constraints
4. Growth Potential: Over 10-15km of additional potentially mineralised strike length to explore
5. Multiple Commodities: Exposure to gold, antimony, silver, and tungsten provides diversification
6. Favourable Political Climate: Operating in the U.S. with supportive pro-mining policies

With drilling planned to start in 2025 and multiple potential catalysts ahead, Resolution Minerals Horse Heaven Project offers investors exposure to a strategic asset in the increasingly important critical minerals sector.

"The Board considers that the acquisition of the Horse Heaven Project has the potential to be a transformative event for RML. As many governments around the world look to onshore their supply of critical minerals, such as antimony and tungsten, we have secured a commanding ground position with known antimony occurrences and next to what is likely to become the largest antimony producer in the USA." – Aharon Zaetz, Executive Director

With both gold and antimony reaching record prices in 2025, Resolution's timing may prove advantageous as it advances exploration on this strategic asset positioned directly adjacent to what will become America's only domestic antimony producer.

Ready to Profit from the Critical Minerals Rush?

Find out how Resolution Minerals is positioning itself at the forefront of the antimony and gold market with its strategically located Horse Heaven Project. With drill-ready targets, exposure to multiple in-demand commodities, and a prime location next to a billion-dollar antimony-gold project, RML offers a compelling investment opportunity in the critical minerals sector. Visit Resolution Minerals' website today to learn more about their exploration plans and how you could benefit from this potentially transformative acquisition.