Black Horse Mining Restarts Drilling at Mt Egerton to Test High-Grade Gold Zone
Key Takeaways
- Drilling has restarted at Mt Egerton after a weather delay, with a ~4,000m program of up to 10 holes planned over the coming months.
- The priority Sister Rose No1 Splay target rests on an adit exposure of 1.3m @ 10.79g/t Au and a historic hole 14m below it that returned 2m @ 5.13g/t Au.
- The first hole, nominally about 400m deep, will cross as much stratigraphy as possible and test the unconfirmed Coopers Lode east of the Sister Rose lodes.
- Later holes target favourable structural positions, deeper untested shoots and historic shaft locations whose surface expression was obliterated by earthworks.
- The announcement does not disclose assay timing, funding details or resource estimates, so first-hole results are the next catalyst to watch.
Drilling resumes at Mt Egerton as Black Horse Mining targets high-grade gold
Black Horse Mining Ltd (ASX: BHL) has announced that drilling is back underway at the Mt Egerton Gold Project after a weather-related pause. The rig is now on the first site of a ~4,000m program of up to 10 holes, which will run over the coming months.
For investors, the restart brings drilling news flow back into view. Subsequent drilling will be informed by the results of this work, so what comes out of these early holes matters for later phases.
David Frances, Managing Director
“It’s good to have the rig turning again at Mt Egerton after the weather delay….”
Key program details from the announcement:
- ~4,000m program
- Up to 10 holes
- First hole nominal depth of about 400m
- Track-mounted, silenced rig with capacity to drill to 1,000m (NQ), described as small footprint and fit-for-purpose
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Sister Rose No1 Splay and the priority drill targets
The program targets several areas. The Sister Rose No1 Splay is described as a priority, but the announcement also lists structural positions within the stratigraphic sequence, deeper untested shoot positions and historic shaft locations.
Sister Rose No1 Splay
Recent rehabilitation of the Sister Rose adit (an old horizontal mine tunnel) exposed a mineralised, west-dipping fault system (-60° towards 250°). It returned 1.3m @ 10.79g/t Au.
Historic drillhole RSE003, located 14m below the exposed structure, returned 2m @ 5.13g/t Au. Together, the company says, these results have delineated a constrained target for drilling in this program. That means the drillers have a reasonably tight area to aim at, rather than a broad search zone.
The historic drillhole RSE003 result was referenced alongside the company’s 1 September 2026 announcement, “New High-Grade Gold Zone Confirmed at Mt Egerton Gold Project.”
| Target | Evidence | Result | Source | Role in program |
|---|---|---|---|---|
| Sister Rose No1 Splay (adit exposure) | Mineralised, west-dipping fault system (-60° towards 250°) | **1.3m @ 10.79g/t Au** | Recent adit rehabilitation | Priority target |
| Sister Rose No1 Splay (RSE003) | Historic drillhole, **14m** below exposed structure | **2m @ 5.13g/t Au** | Company announcement, 1 September 2026 | Defines constrained target with adit exposure |
| Stratigraphic and structural positions | Favourable structural positions in the stratigraphic sequence | Not stated | Mt Egerton announcement | Tested by stratigraphic holes |
| Deeper untested shoots | Deeper shoot positions | Not stated | Mt Egerton announcement | Targeted for drilling |
| Historic shaft locations | Historical workings | Not stated | Mt Egerton announcement | Targeted for drilling |
First hole and the “Coopers Lode”
The first hole is designed to cross as much stratigraphy (the sequence of rock layers) and as many important structural positions as possible. It will also test the “Coopers Lode” position east of the Sister Rose lodes.
The Coopers Lode is a potential mineralised structure referenced in historical records, including the Company’s Prospectus dated 2 October 2025. It is not a confirmed structure, so the hole is a test of the historical record rather than a follow-up to a proven result.
Other targets
Beyond the first hole, the program will test:
- Favourable structural positions in the stratigraphic sequence
- Deeper untested shoot positions
- Historic shaft locations, whose surface expression was obliterated by more recent historical earthworks
Why structural drilling matters for Victorian lode gold
Victorian lode gold systems are often associated with anticlinal hinge zones and associated faults. An anticlinal hinge is the crest of an upward fold in layered rock, and these are places where gold-bearing structures can occur.
Stratigraphic holes drill across the rock sequence to identify as many of these structural positions as possible. The announcement notes that its Figure 2 is illustrative only, and the drillhole dip shown is for illustrative purposes only.
What this means for you: the early holes are about building a geological model, not only chasing a single intercept. Frances said the program involves “…building our understanding of the structural framework of the field, so that each phase of drilling is better targeted than the last.”
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What to watch as the program progresses
Drilling will continue over the coming months, and the company has said it looks forward to updating shareholders as the program progresses. The announcement does not disclose assay timing, results dates, funding details or resource estimates.
The next major exploration phase at Mt Egerton began with diamond drilling aimed at the Sister Rose area, and the current restart continues that campaign after the weather interruption.
Catalysts to watch include:
- First hole results
- Sister Rose No1 Splay intercepts
- The Coopers Lode test
- Results from the shaft areas
With the rig turning again, the next updates will show how the targeting holds up against the drill core.
Ready to Learn More About the Mt Egerton Gold Project?
With the rig turning again on a ~4,000m program, Black Horse Mining is testing the high-grade Sister Rose No1 Splay, where an adit exposure returned 1.3m @ 10.79g/t Au. Early holes could shape every phase of drilling that follows.
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