Red Hill Minerals Drills Two Targets at Broken Hill Chasing Copper-Gold and Lead-Zinc
Key Takeaways
- Red Hill Minerals has commenced a 1,700-metre diamond drilling program at its Broken Hill Project, targeting two separate mineralisation styles across the Curnamona Joint Venture tenure.
- The Furiosa target is a completely untested copper-gold system supported by an AMT conductor coincident with an interpreted fault structure — nearby historical drilling at Polygonum returned 2.6m at 5.13% copper and 4.4 g/t gold.
- The Dementus follow-up hole (26DMDD001) will drill to 1,000 metres at a new location 540 metres south of the 2025 maiden hole, identified through post-drilling downhole EM, gravity, and AMT surveys.
- The 2025 Dementus maiden hole intersected 152.6m at 0.2% zinc and 1.3 g/t silver plus 91.1m at 0.1% lead and 0.3 g/t silver, with textures consistent with a Broken Hill Type mineralising system.
- Drilling completion is expected in late November 2026, with downhole electromagnetic surveys and assay results to follow — no new assay data is disclosed in this announcement.
Drills turn at Broken Hill as Red Hill targets copper-gold and lead-zinc-silver
Red Hill Minerals (ASX: RHI) has commenced a 1,700-metre diamond drilling program at its Broken Hill Project in New South Wales, testing two distinct targets across the Curnamona Joint Venture tenure. The two-hole program will drill the Furiosa copper-gold target and the Dementus lead-zinc-silver target, with completion expected in late November 2026.
Michael Wall, Chief Executive Officer
“Furiosa is an exciting, previously untested copper-gold target where we will test for mineralisation along a highly prospective fault structure. We also look forward to follow-up drilling at Dementus, where last year’s drilling intersected a 250-metre downhole interval containing anomalous lead and textures characteristic of a prospective BHT lode. Our team has since completed extensive gravity and AMT surveys to refine the follow-up drillhole location, and we are pleased to be back on the ground drilling.”
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Two targets, two stories
Furiosa — a fresh copper-gold test
Furiosa is a previously untested copper-gold target, identified through interpretation of bedrock geology, historical drilling data, and the company’s updated geophysical datasets.
Key characteristics of the target:
- A distinct break in magnetic data within a regional antiform supports the interpretation of a fault structure that may have focused mineralising fluids adjacent to reactive lithologies
- Audio-magnetotelluric (AMT) data highlights a conductor coincident with this interpreted fault, supporting the potential for a deep-seated mineralising structure
- A single drillhole to approximately 700 metres will test a magnetic low interpreted as reflecting demagnetisation associated with the fault
For geological context, historical drilling at the nearby Polygonum Target (drillhole DD95SR1), situated along strike adjacent to the interpreted fault, returned narrow, high-grade copper-gold intersections:
- 2.6m at 5.13% Cu, 4 g/t Ag, 4.4 g/t Au from 337.6m
- 0.8m at 1.87% Cu, 8 g/t Ag, 3.4 g/t Au from 504.1m
These results are from the Polygonum Target and are referenced as geological context for the Furiosa program, not as Furiosa intercepts.
Dementus — following up a 250m mineralised zone
Dementus lies under cover on the Mundi Mundi Plains within a potential graben structure interpreted from gravity and magnetic data. Red Hill completed its maiden drillhole, 25DMDD001, to a total depth of 958 metres in November 2025, intersecting over 250 metres of a prospective stratigraphic package with features consistent with a Broken Hill Type (BHT) mineralising system.
Assay results from 25DMDD001 included:
- 91.1m at 0.1% lead and 0.3 g/t Ag from 328m
- 152.6m at 0.2% zinc and 1.3 g/t Ag from 658m
Following that maiden hole, Red Hill conducted downhole electromagnetic surveying, high-resolution gravity surveying, and AMT surveying. This work identified a new target approximately 540 metres south of 25DMDD001. The new drillhole, 26DMDD001, is planned to 1,000 metres to test this refined location. Both holes will be PVC-cased to enable downhole electromagnetic surveys post-drilling.
What is Broken Hill Type mineralisation and why does it matter?
Broken Hill Type (BHT) mineralisation refers to a specific style of lead-zinc-silver ore deposit that forms in ancient metamorphic sequences. The Broken Hill deposit itself is one of the largest base metal deposits ever discovered, making BHT an exploration analogue of genuine global significance.
Key characteristics of BHT mineralisation include:
- Stratiform, layer-parallel geometry: Ore bodies follow the original sedimentary layering rather than cutting across it
- Galena-dominant sulphide assemblages: Lead sulphide (galena) is typically the primary ore mineral, accompanied by zinc sulphide (sphalerite) and silver
- Stratigraphic control: Mineralisation is linked to specific rock units (in this case, equivalents of Broken Hill Group units within the Willyama Supergroup)
- Broad widths: BHT systems can produce very wide mineralised intervals, as seen in the 2025 Dementus results
The Dementus target displayed several of these hallmarks in 25DMDD001, including layer-parallel galena-dominated sulphide assemblages and classic BHT textures, which underpins the rationale for follow-up drilling.
Furiosa represents a contrasting exploration style: a fault-controlled, fluid-focused copper-gold system where mineralising fluids are interpreted to have been channelled along a structural corridor. Both styles of mineralisation occur within the 860km² project area, reflecting the diversity of the tenure’s exploration potential.
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Project context and what comes next
The Broken Hill Project covers 860 square kilometres in New South Wales, approximately 30 kilometres northwest of Broken Hill township, adjacent to the South Australian border. The largely under-explored tenure is covered by thick sedimentary sequences but is interpreted to have significant potential for Tier 1 base metal and copper-gold systems within the Willyama Supergroup.
The table below summarises the two drillholes in the current program:
| Target Name | Commodity Focus | Planned Depth | Key Rationale |
|---|---|---|---|
| Furiosa | Copper-Gold | ~700m | Previously untested fault-controlled target; AMT conductor coincident with interpreted fault structure |
| Dementus | Lead-Zinc-Silver (BHT) | ~1,000m | Follow-up to broad 2025 BHT intercepts; new target ~540m south of maiden hole identified via gravity and AMT surveys |
No new assay results are disclosed in this announcement. The program is at commencement stage, and investors should note that outcomes remain subject to drilling and laboratory analysis. Anticipated near-term milestones include:
- Drilling completion expected in late November 2026
- Downhole electromagnetic surveys upon completion (both holes PVC-cased in preparation)
- Assay results to follow drilling completion
- Further geological interpretation informed by geophysics datasets
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