Resolution Minerals Precious Metals Discovery Yields Exceptional Antimony Grades

Resolution Minerals Uncovers Exceptional High-Grade Antimony and Precious Metals at Horse Heaven Project

Resolution Minerals (ASX: RML) has reported exceptional rockchip and soil sampling results from its Antimony Ridge Target within the Horse Heaven Gold-Antimony-Silver-Tungsten Project in Idaho, USA. The latest findings reinforce the project's potential to become a significant antimony and precious metals discovery in a key strategic location.

Record-Breaking Antimony-Silver-Gold Grades Discovered at Antimony Ridge

The company's recent surface sampling program has delivered the highest grades recorded at Horse Heaven to date, with truly exceptional results:

• Grab sample 730253: 49.8% antimony (Sb), 1,420 g/t silver (Ag), and 3.12 g/t gold (Au)
• Grab sample 730255: 10.35% Sb, 68.5 g/t Ag, and 4.43 g/t Au

These rockchip samples, containing massive stibnite (an antimony sulphide mineral), were collected from a historical antimony mine at the Antimony Ridge Target as part of a comprehensive historical data verification program.

Additionally, soil sampling has revealed impressive peak results:

• Sample 931406: 0.5% Sb
• Sample 931242: 0.9 g/t Au and 68 g/t Ag

Expanded Mineralisation Footprint Reveals District-Scale Potential

The extensive soil sampling program at Antimony Ridge has defined a much larger mineralised zone than previously known. The sampling has outlined a NE-SW trending zone of Sb-Ag-Au mineralisation spanning approximately 1,000m × 700m, with multiple parallel mineralised structures indicated.

This expanded footprint contains several key features:

• The mineralised corridor is substantially larger than previously identified
• The zone remains open-ended along strike in both directions
• Multiple parallel NE-SW trending mineralised structures form a broad corridor
• Previous trench rockchip sampling results (up to 5.9 g/t Au, 19% Sb, and 367 g/t Ag) are located centrally within this expanded zone
• Surface mineralisation is exposed along 500 meters of historical trenching

Understanding Antimony: A Critical Strategic Metal

Antimony is classified as a critical mineral by the United States and many other countries due to its essential applications and supply risks. It's primarily used in flame retardants, lead-acid batteries, and as a hardening agent in lead for ammunition and other applications.

What makes the Horse Heaven discovery particularly significant is the exceptional grade. As RML's Senior Strategic Advisor Steve Promnitz noted:

"Not all Antimony is equal. High grades around 50% Sb are truly rare – and usually reflect crystalline antimony, potentially available for direct shipping ore as an oxide. This is because high grade antimony requires limited processing – and is therefore sought after."

The United States currently has no domestic antimony production, making discoveries like Horse Heaven strategically important for reducing dependence on foreign sources.

Properties and Applications of Antimony

Antimony (chemical symbol Sb) is a silvery-white, brittle metalloid with several unique properties:

• Chemical properties: Antimony has atomic number 51 and typically exists in nature as antimony sulfide (stibnite, Sb₂S₃)
• Physical characteristics: Brittle and relatively soft with low thermal and electrical conductivity
• Primary uses:
  • Flame retardants: The largest application, particularly in plastics, textiles, and electronics
  • Lead-acid batteries: Improves charging characteristics and reduces maintenance requirements
  • Ammunition and other lead products: Hardens lead, improving strength and durability
  • Semiconductors: Used in infrared detectors and diodes
  • Medical applications: Antimony compounds are used to treat parasitic diseases

Approximately 80% of global antimony production comes from China, with significant contributions from Russia and Tajikistan. This concentration of supply has contributed to antimony being classified as a critical mineral by several countries, including the United States.

Promising Historical Drilling Results Support Exploration Model

Historical drilling at Antimony Ridge has intersected significant gold mineralisation, including:

• 1.0 g/t Au over 36.8m in hole GGR-12
• 0.79 g/t Au over 19.8m in hole GGR-16

Notably, these historical drill holes were not assayed for antimony and only partially assayed for silver, suggesting the potential for even more significant polymetallic mineralisation than previously recognised.

Strategic Location Adjacent to Major Development Project

The Horse Heaven Project is directly adjacent to Perpetua Resources' large Stibnite Gold Project, positioning Resolution in a proven mineralised district. This proximity to a major development project could provide infrastructure advantages and enhance the strategic value of Resolution's holdings.

Ongoing Exploration Progress and Next Steps

Resolution has made significant progress with its exploration program, reporting:

1. Completion of 6 core drill holes (4,967 feet/1,513 meters) at the Golden Gate target, with the 7th hole currently underway
2. The first two holes have been logged, split, and submitted for assaying
3. Planned follow-up work at Antimony Ridge includes:
   • Further rockchip sampling and mapping
   • Bulk sampling to help refine drill targets
   • Collection of representative samples for preliminary metallurgical testing
   • Application for permits to undertake Phase 1 drilling at Antimony Ridge

Why Investors Should Watch Resolution Minerals

Resolution Minerals has positioned itself to capitalise on the increasing demand for critical minerals like antimony, while also offering exposure to precious metals. The company's Horse Heaven project displays several compelling attributes:

1. Exceptional grades – The discovery of 49.8% antimony alongside significant gold and silver values represents world-class mineralisation
2. Expanding footprint – The recent soil sampling has dramatically increased the known mineralised area, with multiple parallel structures identified
3. Strategic location – Situated in Idaho, USA, adjacent to a major development project
4. Polymetallic potential – The combination of antimony, gold, silver, and tungsten offers diversified commodity exposure
5. Systematic exploration approach – Resolution is executing a methodical exploration program to build value
6. Critical mineral focus – Antimony's status as a critical mineral could enhance project economics and development potential

As CEO of U.S. Operations Craig Lindsay stated:

"We are very encouraged with the recent sampling program results from Antimony Ridge, which indicate that the mineralised target is larger than initially thought… Indeed, Horse Heaven is revealing itself to be a much larger opportunity as we conduct modern multi-disciplined exploration across the project area. It's potential as a very significant antimony, gold, silver and tungsten project is crystalising."

With pending drill results from the Golden Gate target and plans to begin drilling at Antimony Ridge, Resolution is poised to deliver a steady stream of news flow that could significantly impact valuation as the true scale of the Horse Heaven project continues to emerge.

Interested in Investing in a High-Grade Antimony and Precious Metals Project?

For detailed information about Resolution Minerals' exceptional discoveries at the Horse Heaven Project, including world-class antimony grades of up to 49.8% alongside significant gold and silver values, visit Resolution Minerals' website. Discover how this ASX-listed company is strategically positioned in Idaho, USA to capitalise on critical minerals demand with its expanding polymetallic project footprint and systematic exploration approach.