Kalgoorlie Gold Mining Starts Lighthorse RC Drilling for Depth Extensions
Key Takeaways
- KalGold started RC drilling at Lighthorse on 12 October 2026, up to 22 holes, just six weeks after its 2 September results peaked at 19.70 g/t Au.
- Mineralisation at Lighthorse remains open at depth, with grades appearing to increase on several sections across a 1.6 km strike length.
- A 120-hole aircore program at Rebecca Sequence starts around 20 October 2026, the first systematic test of the eastern LTZ's high-grade metamorphic rocks.
- Rebecca Sequence sits 16 km north of Ramelius's 1.4 Moz Lake Rebecca project, where mining is targeted for the December 2027 quarter.
- KalGold holds more than 214,000 oz of resources at a discovery cost under A$4.60 per ounce, but no assay result dates have been disclosed.
RC drilling underway at Lighthorse as aircore set for Rebecca Sequence
Kalgoorlie Gold Mining (ASX: KAL), or KalGold, has fast-tracked two drill programs at its Pinjin Gold Project. Reverse Circulation (RC) drilling commenced on Monday 12 October 2026 at Lighthorse, while aircore drilling at the Rebecca Sequence is scheduled to start around 20 October 2026.
The two programs will run concurrently. For you as an investor, the timing matters: the Lighthorse drilling follows the company’s 2 September 2026 results, so KalGold is moving from results to follow-up drilling within roughly six weeks, which points to momentum in the exploration pipeline.
When big ASX news breaks, our subscribers know first
Lighthorse RC program targets depth extensions
Why is KalGold drilling again?
Recent RC drilling at Lighthorse (ASX: KAL, 2 September 2026) returned high-grade gold assays that peaked at 19.70 g/t Au (KGRC26036, 145-146m) in fresh rock. Thick zones of mineralisation were reported throughout the 1.6 km strike length of the prospect area.
Gold mineralisation remains open at depth, with grades appearing to increase at depth on several sections. Those results prompted KalGold to fast-track the RC program to test gold distributions at depth. In plain terms, “open at depth” means the drilling has not yet found the bottom of the mineralisation.
What are the program aims and scope?
The program’s key aims include:
- Testing directly beneath recent high-grade mineralisation for continuity along strike and to depth.
- Turning the rigs around to drill towards the west, testing a steeply east-dipping geology and mineralisation model.
The program comprises a maximum 22 drill holes spaced irregularly throughout the footprint of the Lighthorse prospect. These encompass the two main centres of gold mineralisation, the discovery area and the northern area. Drilling is expected to take several weeks to complete.
The table below summarises both programs.
| Program | Method | Holes | Start date | Location/purpose |
|---|---|---|---|---|
| Lighthorse | RC | Maximum 22 | 12 October 2026 (commenced) | Depth testing |
| Rebecca Sequence | Aircore | 120 | Around 20 October 2026 | First-pass |
Rebecca Sequence aircore: first-pass look at the eastern LTZ
The Rebecca Sequence target area is centred approximately 4 km east of the Lighthorse prospect. The program builds on KalGold’s recent LTZ Flexure exploration (5 October 2026 release) and forms part of its broader strategy to assess new areas of the Laverton Tectonic Zone (LTZ) for gold mineralisation.
The LTZ Flexure aircore results covered 225 holes and defined multiple coherent gold anomalies at 10-20 times background, which is the groundwork now guiding where the Rebecca Sequence grid is being extended.
According to the company, it will be the first systematic testing of the high grade metamorphic rocks on the eastern side of the LTZ. That makes it a genuine first look rather than a follow-up on known mineralisation.
The program comprises 120 holes with an estimated depth of approximately 40 m, with final depths defined by the rig’s inability to penetrate further, known as “blade refusal”. Drilling will be completed on a nominal 400 m by 100 m grid pattern to provide broad first pass coverage.
The aim is to detect coherent, low-level gold anomalism that will define targets for follow-up aircore and RC drilling.
There is a neighbour worth noting. The Rebecca Sequence hosts Ramelius Resources’ (ASX: RMS) Lake Rebecca Gold Project, which contains Mineral Resources of approximately 1.4 Moz Au (ASX: RMS, 25 August 2026), around 16 km to the south of KalGold’s tenure. That figure belongs to Ramelius, not KalGold.
What are RC and aircore drilling?
Aircore is a shallow, low-cost drilling method suited to covering large areas quickly. Explorers use it as a reconnaissance tool to find faint gold signals in the ground, known as anomalies.
RC drilling reaches greater depths and is used to test targets once they are identified. This is the staged logic in KalGold’s announcement: aircore defines anomalies, and RC follows up.
For you as an investor, this sequence is how explorers typically move from targets towards potential resources. The Lighthorse RC program sits at the follow-up stage, while the Rebecca Sequence aircore program sits at the first-pass stage.
The next major ASX story will hit our subscribers first
Pinjin’s strategic setting and what comes next
The Pinjin Gold Project is located in a Tier One location approximately 140 km northeast of Kalgoorlie-Boulder. It covers a substantial portion of the southern part of the Laverton Tectonic Zone, described as the 30 Moz LTZ.
Next door, Ramelius Resources’ Rebecca Gold Project has a recent definitive feasibility study that outlined commencement of mining activities in the December 2027 quarter (ASX: RMS, 28/10/25).
Key facts from the announcement:
- Location: approximately 140 km northeast of Kalgoorlie-Boulder, within the 30 Moz LTZ.
- Existing Pinjin resource: a first JORC Code (2012) Inferred Mineral Resource Estimate at Kirgella Gift and Providence of 2.34 Mt at 1.0 g/t Au for 76,400 oz.
- Company-wide resource: KalGold’s total gold resource is in excess of 214,000 oz.
- Discovery cost: currently less than A$4.60 per ounce of gold, according to the company.
- Next steps: results from the Lighthorse RC and Rebecca Sequence aircore programs.
The announcement does not disclose when assay results are expected.
Don’t Miss the Next ASX Gold Discovery
Join 30,000+ investors getting FREE breaking ASX gold news delivered to their inbox within minutes of release, complete with in-depth analysis and the full announcement. Click the “Free Alerts” button at Big News Blast to get alerts the moment market-moving news breaks.