Heavy Rare EARTHS Ltd
Heavy Rare Earths Clears Final Hurdle Before Maiden Drill at South Australia's Largest Tin Prospect
The Heavy Rare Earths South Ridge tin drill program at Prospect Hill has reached a landmark moment, with Heavy Rare Earths Limited (ASX: HRE) securing heritage clearance from the Traditional Owners of the land, the Dieri Aboriginal Corporation. This clearance marks the last major milestone before the company launches its maiden 25-hole, 2,500-metre drill program at the South Ridge Tin Prospect within the Prospect Hill Project in South Australia.
The clearance removes a critical gating item for the program, which is designed to test a series of high-grade historic tin intersections — including a standout result of 3 metres at 4.85% tin (Sn) — and potentially define a maiden resource estimate (MRE) at what the company describes as South Australia's largest tin prospect.
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Heritage Clearance: The Final Green Light
The heritage survey was conducted during May 2026 and attended by Heavy Rare Earths' Exploration Manager, Joseph Ogierman, a qualified anthropologist, and representatives of the Dieri Aboriginal Corporation. The on-ground inspection covered the planned drill hole locations across the Prospect Hill Project, and the Dieri subsequently confirmed their satisfaction with the findings.
What made this survey particularly notable was the logistical challenge involved in completing it. South Australia experienced extraordinary rainfall in Q1 2026 — more than double the average annual total within just two months — rendering standard road access unsafe. To ensure the survey proceeded without further delay, Heavy Rare Earths deployed a helicopter to transport the team to site, demonstrating a clear commitment to keeping the program on schedule.
"The experience was another example of the respectful and successful collaboration with the Dieri at Prospect Hill following original clearance for a survey completed in 2017."
— Heavy Rare Earths
This is not the first time Heavy Rare Earths and the Dieri have worked together at Prospect Hill. The relationship dates back to an earlier clearance process in 2017, and the smooth completion of the May 2026 survey reflects the strength of that ongoing partnership.
What's Already in Place — and What Comes Next?
With heritage clearance now secured, Heavy Rare Earths has several other workstreams either completed or actively progressing:
| Milestone | Status |
|---|---|
| Heritage clearance from Dieri Aboriginal Corporation | Complete |
| Program for Environment Protection and Rehabilitation (PEPR) submitted to SA's Department for Energy and Mining (DEM) | Submitted / Pending Approval |
| South Australian drilling contractor engaged | Confirmed |
| Road access and remediation | In Progress |
| Maiden 25-hole, 2,500m drill program commencement | Pending access conditions and all approvals |
The PEPR submission to the Department for Energy and Mining is a standard regulatory requirement for drilling activities in South Australia. Furthermore, the company is working in parallel with local contractors to remediate roads damaged by the record rainfall to allow safe transport of drilling equipment to site.
Drilling is set to commence once access conditions are confirmed safe and all approvals are in hand.
Understanding the Opportunity: What the Historic Data Shows
The South Ridge prospect comes with a meaningful body of historical data that has motivated Heavy Rare Earths to prioritise this drill program. Among the most significant historic intersections on record:
- 3 metres at 4.85% tin (Sn) — a high-grade result that stands out in the context of global tin exploration benchmarks
- Multiple additional high-grade intersections across the prospect area
The upcoming 25-hole program is designed to systematically test these historic results and build the geological understanding needed to potentially support a maiden JORC-compliant resource estimate.
The project sits within the Curnamona Province of eastern South Australia, a well-regarded geological region known for hosting uranium and critical mineral deposits.
What Is a Maiden Resource Estimate — and Why Does It Matter?
A Maiden Resource Estimate (MRE) refers to the first formal, JORC Code-compliant estimate of the quantity and grade of a mineral resource at a given project. It represents the transition from exploration-stage drilling to a quantified inventory of in-ground material.
For investors, an MRE is a significant de-risking milestone. It:
- Provides an independently verified tonnage and grade figure that the market can assess and value
- Opens the door to scoping studies, feasibility work, and potential development pathways
- Materially increases a project's profile with potential partners, acquirers, or financiers
At South Ridge, Heavy Rare Earths is targeting this outcome from its maiden drill program — meaning the upcoming holes are not simply exploratory; they are specifically designed to generate data that could directly feed into a resource calculation.
Understanding Tin in the Critical Minerals Context
Tin is classified as a critical mineral in multiple jurisdictions due to its essential role in electronics manufacturing, soldering, and emerging energy storage technologies. Despite increasing demand, global tin supply has remained relatively constrained, with most production concentrated in a handful of countries.
The mineral's unique properties make it irreplaceable in many applications. Electronic devices rely on tin-based solder to create reliable electrical connections, whilst the automotive sector increasingly requires tin for electric vehicle components. Energy storage systems, particularly large-scale battery installations, use tin in various components to enhance performance and longevity.
From a geological perspective, tin typically occurs in cassiterite (tin oxide) deposits, often associated with granite intrusions and pegmatites. These deposits can form high-grade concentrations when geological conditions align, which consequently explains the significance of the historic 4.85% tin intersection at South Ridge.
Key Terms to Know
- Sn: The chemical symbol for tin
- MRE (Maiden Resource Estimate): The first JORC Code-compliant estimate of a mineral resource at a project
- JORC Code: The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves — the industry standard for resource reporting in Australia
- PEPR: Program for Environment Protection and Rehabilitation — a regulatory submission required before drilling commences in South Australia
- Curnamona Province: A geological region spanning parts of South Australia and New South Wales, known for hosting significant mineral systems
South Australia's Largest Tin Prospect: The Scale of the Target
The framing of South Ridge as South Australia's largest tin prospect is a notable differentiator for Heavy Rare Earths. Tin exploration is a relatively niche area on the ASX, which means well-positioned projects can attract disproportionate attention as programs mature.
The Prospect Hill Project's location within the Curnamona Province — a region Heavy Rare Earths describes as uranium- and critical minerals-rich — adds further strategic context. The company's broader portfolio spans both the Curnamona Province in South Australia and the Mid-West region of Western Australia, giving Heavy Rare Earths exposure to multiple commodity themes within a single exploration vehicle.
The geological setting at Prospect Hill is described by the company as being within an area known for hosting significant mineral systems. Historic exploration work has identified multiple high-grade tin intersections across the prospect area, with the 3 metres at 4.85% tin intersection representing one of several encouraging results that have guided the planning of the upcoming drill program.
Upcoming Catalysts to Watch
With heritage clearance now in hand, the path forward is relatively clear. Investors should, however, watch for the following near-term developments:
- PEPR Approval from South Australia's Department for Energy and Mining — the final regulatory step before drilling commences
- Road access confirmation — local contractors are actively remediating weather-damaged roads
- Drill program commencement — the 25-hole, 2,500-metre program will begin once access and approvals align
- Assay results from the maiden drill program — early results could indicate whether a maiden resource estimate is achievable
- Maiden Resource Estimate — the strategic endpoint of the current drill program if results are consistent with historic data
The timing of these catalysts depends largely on weather-related road conditions and the regulatory approval process. Heavy Rare Earths has indicated that a South Australian drilling contractor has been engaged, suggesting the operational framework is in place pending final approvals and safe site access.
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Why Investors Should Keep Heavy Rare Earths on Their Radar
Heavy Rare Earths has methodically worked through the key pre-drill requirements at South Ridge — community consultation, environmental submissions, contractor engagement — and is now positioned to commence drilling as soon as weather-related access constraints are resolved.
The combination of a high-grade historic dataset, a clearly defined 25-hole drill plan, and a project described as South Australia's largest tin prospect gives the upcoming program meaningful news-flow potential. If drilling confirms and extends the historic high-grade intersections, the pathway toward a maiden resource estimate becomes tangible — and with it, a potential step-change in how the market values the asset.
The company's collaborative relationship with the Dieri Aboriginal Corporation, demonstrated across multiple engagements stretching back to 2017, also reflects a measured and respectful approach to project development that reduces social licence risk going forward.
From an investment perspective, Heavy Rare Earths represents exposure to both tin exploration and the broader critical minerals theme. The company's portfolio spans uranium and critical minerals projects across two Australian states, providing diversification within the resource exploration sector.
The technical competence demonstrated through the systematic approach to the Heavy Rare Earths South Ridge tin drill program — from heritage clearance through to environmental approvals and contractor engagement — suggests a management team focused on operational execution rather than promotional activity.
Investment Thesis Summary
Heavy Rare Earths (ASX: HRE) has secured heritage clearance for its maiden drill program at South Ridge — South Australia's largest tin prospect — with a 25-hole, 2,500-metre program targeting high-grade historic intersections including 3 metres at 4.85% tin. With environmental submissions lodged, a contractor engaged, and road remediation underway, the company is positioned for a drill campaign that could define a maiden resource estimate and mark a meaningful inflection point for the project.
Ready to Learn More About Heavy Rare Earths and the South Ridge Tin Prospect?
With heritage clearance secured and a maiden 25-hole, 2,500-metre drill program locked and loaded at South Australia's largest tin prospect, Heavy Rare Earths (ASX: HRE) is approaching a potentially defining moment in the company's development. For investors seeking exposure to a high-grade tin exploration story with near-term catalysts and a clear pathway to a maiden resource estimate, head to the Heavy Rare Earths investor page to find out more about the company and its projects.
