Black Horse Mining (ASX: BHL) — Maiden Drilling at Mt Egerton Lights Up a Forgotten Victorian Goldfield
- Noel Ong
- 1 day ago
- 13 min read
High-grade, near-surface hits up to 46.2 g/t Au from the company's first program — and a textbook Bendigo-Ballarat structural setting beneath a former open-cut.
The electro-hydraulic diamond rig set up at Mt Egerton with NQ drill string in foreground — work started on day one of BHL's ASX listing in December 2025.
ASX: BHL | Gold | Mt Egerton |
Black Horse Mining Ltd (ASX: BHL) is the latest small-cap to put a drill rig on a piece of Victorian gold history. The Company listed on the ASX on 2 December 2025 and, unusually for a freshly-listed explorer, had both ground geophysics and diamond drilling underway on day one at its flagship Mt Egerton Gold Project, located within and around the township of Mt Egerton between Ballarat and Melbourne.
Mt Egerton itself has serious pedigree: it is one of only eight gold mines in Victoria to produce over 1 million ounces from primary (hard-rock) sources, with recorded production up to 1903 of approximately 1.29 million ounces at grades of between 5.5 and 19.3 grams per tonne, and operations ceased in 1906 due to water ingress and failure of pumping equipment rather than resource depletion.
Critically for the modern exploration thesis, less than 10% of historical drilling has gone deeper than 150 metres, leaving the down-plunge extensions of the historic high-grade lodes effectively untested — a setup that invites comparison with Fosterville, where the transformative ultra-high-grade Swan zone was only discovered well below 800 m depth.
Over five short months between December 2025 and April 2026, BHL has moved from "company listing" to "high-grade gold confirmed" — and the underlying announcements deserve a careful read because the numbers are real, the geological story is coherent, and the conservatism around lost core is notable.
Why Mt Egerton matters — at a glance
Maiden drill hit — hole 26MEDD005 returned 0.75 m @ 17.4 g/t Au from 55.8 m and 0.7 m @ 14.6 g/t Au within a 5.2 m mineralised zone.
Follow-up bonanza grade — hole 26MEDD004 returned 0.25 m @ 46.2 g/t Au and 0.5 m @ 20.5 g/t Au from a 4.4 m zone starting at 49.65 m — extending the high-grade zone vertically by ~10 m.
Historic workings confirmed — a 4.85 m void in 26MEDD001 and a 1.75 m void in 26MEDD004 (filmed with a downhole camera) validate the location of the historic Quarry Lode workings.
Phase 2 ready — a larger-diameter (HQ) rig capable of drilling up to 1,000 m holes is being prepared to test deeper targets E, F, and parallel reef systems.
Cash position — A$5.54 million at 31 March 2026; 8+ quarters of funding at current burn.
Setting the scene — what BHL acquired and why it matters
Mt Egerton is not a "greenfield" story. The field has an extensive mining history, and the bedrock geology — folded Ordovician turbidites cut by north-south quartz reefs and a series of late-stage faults — is the textbook recipe that produced Fosterville and Bendigo. The accompanying long-section, reproduced from BHL's prospectus, shows the field's known reef-and-stope footprint and the seven priority drill target areas the Company has nominated for systematic testing.
Figure 1 — Mt Egerton mining complex long-section showing historic stoped regions (dark grey), plunge-from-workings (light blue) and the priority drill target areas A through G. The Company's maiden program tested Target Area B; deeper targets E, F and G are still untested. (Source: ASX Announcement)
The "Stoped Region" shading on the section tells a useful story: previous miners stripped out continuous lodes down to roughly 200–400 m below surface, but the projection of those plunges keeps going — into ground that has never had a modern drill hole through it. That is the strategic prize.
Day one: magnetotellurics before the drill rig moves
Before any holes were collared, BHL ran a ground magnetotelluric (MT) survey. The purpose was deliberately narrow: to locate the historic underground workings, which previous mapping had placed inaccurately. The Company found that interpreted historical shaft locations were 30–40 m off their noted positions — a meaningful error when planning a 100 m diamond hole.
Figure 2 — Real-time MT data showing zones of high (red) and low (blue) resistivity directly beneath the survey line, used on-site to refine drill hole geometry. (Source: ASX Announcement)
The MT method has a useful operational feature: the raw field data can be read in real time and used to nudge proposed drill collar locations, dips and azimuths to avoid intersecting voids.
Figure 3 — MT field survey line at Mt Egerton showing the electrodes and charging/recording wire pegged out across the survey corridor. (Source: ASX Announcement)
In the March 2026 quarterly report, BHL confirmed that the MT results, together with reprocessed historical ground penetrating radar (GPR), have been integrated into a 3D geological model of the project — a quiet but important step for resource-style targeting.
The maiden drill program — seven holes, 618 m of core, Target Area B
BHL drilled a total of 618 m of NQ diamond core across seven holes between December 2025 and February 2026, all within Target Area B beneath the hill behind the Waste Transfer Facility (formerly the historic Quarry Lode open cut). The drillhole layout is shown below.
Figure 4 — Drillhole location plan over Target Area B. Red traces are 2026 holes (26MEDDxxx); yellow traces are 2025 holes (25MEDDxxx). The green polygon marks the position of historic underground voids intersected and videoed by the program.
Drillhole collar summary
Table 1: Maiden drilling program collar table. * Holes 25MEDD002 and 25MEDD002A were abandoned before reaching target depth. Highlighted rows show holes with assays already received.
Hole ID | Type | MGA East | MGA North | RL (m) | Azimuth | Dip | Status |
25MEDD001 | DD | 244,617 | 5,831,018 | 600.7 | 310.79 | -52.0 | Received |
25MEDD002* | DD | 244,614 | 5,831,055 | 604.2 | 281.59 | -60.5 | Pending |
25MEDD002A* | DD | 244,612 | 5,831,056 | 604.2 | 281.59 | -61.5 | Pending |
25MEDD003 | DD | 244,617 | 5,831,016 | 600.8 | 310.69 | -40.0 | Pending |
26MEDD004 | DD | 244,587 | 5,831,065 | 603.8 | 268.69 | -71.5 | Received |
26MEDD005 | DD | 244,587 | 5,831,065 | 603.8 | 268.69 | -76.0 | Received |
26MEDS001 | DD | 244,587 | 5,831,065 | 603.8 | 152.00 | -65.0 | Pending |
Figure 5 — The maiden drill rig set up on the hill behind the Mt Egerton Waste Transfer Facility — which itself sits in the filled-in historic Quarry Lode open cut.
Hole 26MEDD005 — the first signal that the historic miners left something behind
"We are very encouraged by these first drilling results from Mt Egerton, which have confirmed high-grade, near-surface gold mineralisation in hole 26MEDD005…" — David Frances, Managing Director, 11 March 2026.
Reported on 11 March 2026, hole 26MEDD005 intersected a 5.2 m zone of mineralisation from 55.8 m to 61 m downhole. Core recoveries through the altered, mineralised section were intermittently poor, but the assayed portions of the zone returned highly encouraging numbers — and importantly, BHL elected NOT to interpolate any grade across the lost intervals, which means the headline grades read low rather than high.
Table 2: Significant gold assays from hole 26MEDD005. Highlighted rows show the headline high-grade intercepts of 0.75 m @ 17.4 g/t Au and 0.7 m @ 14.6 g/t Au within the 55.8–61.0 m zone. Reporting cut-off 0.75 g/t Au; maximum 3 m internal sub-grade for significant intercepts.
From (m) | To (m) | Interval (m) | Au (g/t) | Comment |
18.95 | 19.50 | 0.55 | 1.09 |
|
20.00 | 20.50 | 0.50 | 1.35 |
|
21.60 | 21.75 | 0.15 | 2.03 |
|
22.75 | 23.35 | 0.60 | 0.76 |
|
55.80 | 56.55 | 0.75 | 17.40 | High-grade |
57.65 | 58.35 | 0.70 | 14.60 | High-grade |
58.90 | 59.25 | 0.35 | 4.51 |
|
59.40 | 60.35 | 0.95 | 3.02 |
|
60.45 | 61.00 | 0.55 | 1.79 |
|
84.70 | 86.15 | 1.45 | 1.45 |
|
91.70 | 91.80 | 0.10 | 2.25 |
|
92.00 | 92.50 | 0.50 | 0.74 |
|
92.60 | 93.20 | 0.60 | 0.81 |
|
Figure 6 — Section 5831065N looking north, showing the 26MEDD005 intersection in red and the relationship with historic intersections MTEC075 (2 m @ 35.9 g/t Au) and MTEC038 (7 m @ 18.03 g/t Au).
Two further details about 26MEDD005 deserve attention. First, hole 26MEDD001 — drilled on the same target as historic hole MTEC038 (7 m @ 18.03 g/t Au) — encountered a 4.85 m void exactly where the historic data said a stope should be. The cross-check is significant: it tells BHL that the historic positional data, while not perfect, is reliable enough to plan modern drilling against. Second, BHL's competent person notes that recoveries in the surrounding country rock below the weathering horizon (roughly 80–120 m depth) are good — the recovery problem is specifically tied to the altered, mineralised zones and the historic workings themselves. That is a solvable problem with larger-diameter core.
Figure 7 — Orthogonal section showing the spatial relationship between historic hole MTEC038 (7 m @ 18.03 g/t Au) and the void encountered in 26MEDD005 directly beneath it. The small offset gives strong confidence in the historic positional data.
Hole 26MEDD004 — and then it got better
Two weeks later, on 24 March 2026, BHL released the assays for 26MEDD004 — drilled essentially from the same collar as 26MEDD005 but at a shallower dip — and the numbers stepped up materially.
Table 3 — Significant gold assays from hole 26MEDD004. The 4.4 m zone from 49.65 m to 54.05 m culminates in 0.5 m @ 20.5 g/t Au and 0.25 m @ 46.2 g/t Au — a bonanza-grade tail intercept that extends the high-grade zone ~10 m vertically above 26MEDD005.
From (m) | To (m) | Interval (m) | Au (g/t) | Comment |
3.00 | 3.10 | 0.10 | 5.01 |
|
4.10 | 4.25 | 0.15 | 1.18 |
|
24.10 | 25.10 | 1.00 | 2.53 |
|
49.65 | 50.45 | 0.80 | 1.03 |
|
51.15 | 51.75 | 0.60 | 3.77 |
|
51.85 | 52.20 | 0.35 | 2.48 |
|
52.30 | 53.00 | 0.70 | 5.75 |
|
53.00 | 53.50 | 0.50 | 20.50 | High-grade |
53.80 | 54.05 | 0.25 | 46.20 | Bonanza |
Two intervals from this hole — 0.5 m @ 20.5 g/t Au and 0.25 m @ 46.2 g/t Au — are the kind of grades that justify the term "bonanza" in Victorian goldfield language. When combined with the 26MEDD005 intercepts directly below, the result is a coherent, vertically-stacked high-grade zone, exactly the geometry that historic Bendigo-Ballarat miners learned to follow downwards.
"The conservative approach of assigning zero grade to unrecovered core intervals means the true tenor of the mineralised zones is likely materially higher than reported." — David Frances, Managing Director, 24 March 2026.
Figure 8: Combined Section 5831065N showing 26MEDD004 and 26MEDD005 intersections together. The high-grade zone is continuous and extends vertically by ~10 m above the earlier intercept. ERC042 (10 m @ 6.38 g/t Au) sits to the east on a separate sub-parallel structure.
A camera in the hole — the void that proved the model
Hole 26MEDD004 also intersected a 1.75 m void at 20.25 m downhole. Rather than just log it and move on, BHL lowered a camera down the hole and videoed the working. The footage (available on the Company's YouTube channel) reveals a north-south striking drive of approximately 1 m x 1.8 m and an east-west crosscut roughly 2.4 m x 1.8 m, with a series of south-dipping quartz veins clearly visible in the drive walls and back.
Figure 9: Still from the downhole camera survey inside the historic drive intersected by 26MEDD004. Blue lines trace south-dipping quartz "spur veins" visible in the wall and backs — the same vein style logged in core from the surrounding drilling.
These spur-vein arrays are the structural fingerprint of the central Victorian goldfields. The classic Willman & Wilkinson (1992) diagram below shows what the historic miners were chasing: extensional vein arrays splaying off a reverse fault and concentrating gold in dilational jogs.
Figure 10: Reef and dilational-jog on reverse fault, with extensional spur-vein arrays typical of the Bendigo-Ballarat Goldfields (after Willman & Wilkinson, 1992). The architecture in the 26MEDD004 drive footage matches this model.
Spur-vein zones host significant gold in mines across the Bendigo-Ballarat goldfields, and the historic hole ERC042 — sitting immediately east of the void — already confirms that these particular spur veins are themselves mineralised, returning 10 m @ 6.38 g/t Au (including 3 m @ 17.7 g/t Au).
Figure 11 — Detailed section showing the void intersected in 26MEDD004 (green) immediately adjacent to historic hole ERC042 (10 m @ 6.38 g/t Au). Numbers down the ERC042 trace are individual sample grades in g/t Au, showing a clear mineralised zone proximal to the workings.
What the geology is telling us
Pull the threads together and a consistent picture emerges. Mt Egerton is a classic central-Victorian orogenic gold system, with mineralisation concentrated in north-south quartz reefs at fold hinges, along late-stage faults, and at dilational jogs where extensional spur veins splay off the main reef structure. The 19th- and 20th-century miners removed the obvious, near-surface portions of the reefs — but the structural model says high-grade should also exist:
• Down-plunge of the historic workings, where the projected plunges (light-blue shading in the long-section) head into ground that has never been drilled.
• In vertically-stacked or parallel reef systems adjacent to but offset from the worked lodes.
• At structural intersections (fault-on-reef, fold-hinge-on-fault) where the system would naturally concentrate fluid flow.
• At depth below the historic stopes, where no historic drill data exists at all.
The Fosterville analogy is doing a lot of work in the prospectus and the recent announcements — and while every junior wants to be the next Fosterville, the geological logic is genuinely there: an under-explored Victorian goldfield with confirmed remnant high-grade mineralisation, where modern drilling and 3D modelling can be applied to ground that has never had either.
Phase 2 — bigger rig, deeper holes, broader targeting
BHL has flagged that the next drilling campaign will use a rig capable of drilling larger-diameter (HQ) core to depths of up to 1,000 m. The shift from NQ to HQ is a direct response to the core recovery problems encountered in the altered and worked zones of the maiden program — bigger core means better recovery, which means the "true grade" of mineralised zones is less likely to be obscured by lost intervals.
The Phase 2 program will target:
• Accurately located historic Quarry, Egerton, Sister Rose and Rose shaft positions (tightened up via MT and 1930s/1970s aerial photography).
• Follow-up of the high-grade 26MEDD004/005 zone to establish strike and dip continuity.
• Extensions into other known historic intercept zones along the section.
• Deeper holes into Target Areas E and F, which sit beneath the historic stopes.
Assays from holes 25MEDD002, 25MEDD002A, 25MEDD003 and 26MEDS001 are still pending and will provide additional structural information about the system before the bigger rig moves on site.
The cash, the people, the runway
BHL ended the March 2026 quarter with a cash balance of A$5.54 million. Year-to-date exploration spend sits at A$944,000 against a A$4 million 24-month prospectus allocation — meaning the bulk of the exploration budget is still ahead of the Phase 2 program. On the quarter's operating burn, the Company estimates eight quarters of funding available, comfortably clear of the ASX's two-quarter rule.
Funds used vs Prospectus forecast
Table 4 :Reconciliation of actual expenditure to 31 March 2026 against the Prospectus 24-month forecast (A$'000). Source: BHL March 2026 Quarterly Activities Report.
Allocation of Funds | Prospectus 24-month forecast (A$000) | Actual to 31 Mar 2026 (A$000) |
Exploration activities | 4,000 | 944 |
Acquisition Agreement | 100 | 76 |
Expenses of the Offer | 610 | 824 |
Corporate, administrative & working capital | 3,290 | 508 |
Total | 8,000 | 2,352 |
Two corporate items from the quarter are worth noting. The Company appointed Mr Charles McHugh as Executive Director and Ms Amber Rivamonte as Chief Financial Officer (ASX release, 31 March 2026), rounding out a board that began the year heavily reliant on Managing Director and Competent Person David Frances. For a junior explorer that has just listed and is moving into a more capital-intensive drilling phase, that is a sensible strengthening of the bench.
Samso Concluding Comments
The Black Horse Mining story is definitely one that I will be following with great interest. David Frances and Charles McHugh were in my batch of aspiring geologists in the University of Western Australia three decades ago, in fact, it is nearly four decades ago. I have a great respect for what they have achieved over the years, and after speaking to Charles recently, the Mt Egerton Gold Project sounds to be more than interesting.
The strategy and the history are convincing, and with Charles being a mining engineer with experience in Western Mining Corporation, I am sold that they have someone competent to take that role of "making it happen".
The history and the strategy for finding the extension of the lodes seem to be gaining traction with their recent drilling. The fact that there is a potential of early mining, this is going to a bonus for existing shareholders.
I encourage readers to look deep into the story and reach out to Dave and Charles to explain the details. I ensure that those who do will come away from that conversation with the same conviction as I did. I am looking forward to having a Coffee with Samso with David and Charles (if possible). Black Horse is definitely on our list of companies to follow.
About the Black Horse Mining Ltd
Black Horse Mining Ltd (ASX: BHL) is a Victorian-focused gold explorer that debuted on the Australian Securities Exchange on 2 December 2025 following a heavily oversubscribed A$8 million initial public offering.
The IPO was cornerstoneed by major shareholder Province Resources Ltd, which subscribed for A$3 million, and shares opened well above the offer price on day one.
The Company's flagship asset is the Mt Egerton Gold Project, located within the township of Mt Egerton between Ballarat and Melbourne in the southwestern Bendigo-Ballarat Zone of the Lachlan Fold Belt — one of Australia's most historically productive gold belts, with more than 80Moz produced across the Bendigo–Ballarat zone.
The Company is led by Managing Director and CEO David Frances, a Member of the Australian Institute of Geoscientists and the Competent Person on Mt Egerton's exploration results, with the board strengthened during the March 2026 quarter by the appointment of mining veteran Charles McHugh as Executive Director and Amber Rivamonte as Chief Financial Officer.
With A$5.54 million in cash at 31 March 2026, a maiden drilling program that has already returned near-surface intercepts up to 46.2 g/t Au, and a Phase 2 program planned with larger-diameter (HQ) core capable of holes up to 1,000 m deep, BHL is positioning Mt Egerton as a modern re-examination of one of Victoria's truly significant but long-overlooked historical gold fields.
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