KalGold Defines 2km Gold Trend at Pinjin From First Aircore Program
Key Takeaways
- KalGold completed 225 aircore holes for 7,212 m at the LTZ Flexure, defining multiple coherent gold anomalies at 10–20 times background levels across the first systematic test of this regional-scale target.
- A northern anomalous gold trend extends up to 2 km of strike, with gold anomalism spatially aligned with structural and geophysical features interpreted as vectors toward primary orogenic gold mineralisation at depth.
- Initial drilling into the Rebecca Sequence returned gold anomalism with an associated antimony response — a different pathfinder chemistry to the Pinjin Sequence — and the same sequence hosts Ramelius Resources' Rebecca Gold Project 16 km to the south along strike.
- Two follow-up drill programs are scheduled for mid-October 2026: RC drilling at Lighthorse targeting high-grade extensions in fresh rock, and first-pass aircore drilling of the Rebecca Sequence extending north and northeast of the current grid.
- Both programs are contingent on the timely reopening of the Kurnalpi-Pinjin Road following unseasonal heavy rainfall in late September 2026 that caused road closures across the Eastern Goldfields.
First aircore program at LTZ Flexure unlocks new gold targets at Pinjin
Kalgoorlie Gold Mining (ASX: KAL), known as KalGold, has completed its first-pass aircore drill program over the regional-scale Laverton Tectonic Zone (LTZ) Flexure target within the Pinjin Gold Project, turning a previously untested area into a portfolio of defined gold targets ready for deeper follow-up testing.
The program delivered 225 aircore holes for 7,212 m drilled (average depth 32 m), returning multiple coherent gold anomalies across the drill footprint and providing clear vectors toward potential primary gold mineralisation at depth.
Key results from the program include:
- 225 aircore holes completed for 7,212 m (average depth 32 m), representing the first systematic test of the regional-scale LTZ Flexure target area
- Multiple zones of coherent gold anomalism defined using a cumulative down-hole Au threshold of 20 ppb (approximately 10–20 times background levels)
- A northern anomalous trend extending for up to 2 km of strike through the northern half of the drill grid
- Significant individual intercepts: KGAC26094 (1 m @ 0.196 g/t Au from 40 m), KGAC26188 (1 m @ 0.378 g/t Au from 41 m), KGAC26189 (4 m @ 0.167 g/t Au from 36 m)
- Gold anomalism aligns with interpreted structural and geophysical features, potentially providing vectors toward primary mineralisation at depth
- Deeper RC follow-up drilling and additional first-pass aircore drilling of the Rebecca Sequence are both planned to commence mid-October 2026
Dr Matt Painter, Managing Director and CEO
“The first-pass aircore program at the LTZ Flexure has successfully opened up a previously untested area of the Pinjin Gold Project, identifying multiple coherent gold anomalies along the region’s principal gold-mineralising structure.
Importantly, several of these anomalies align with the structural and magnetic features identified through KalGold’s targeting work. This provides encouraging validation of the geological model and has identified priority areas for follow-up exploration targeting primary gold mineralisation at depth.
In the north-east of the drill grid, initial drilling also tested part of the Rebecca Sequence, which hosts gold mineralisation at Ramelius Resources’ Rebecca Gold Project along strike to the south. Gold anomalism, together with an associated antimony response, provides further encouragement to test the extent of this prospective sequence within KalGold’s tenure.
Further aircore drilling of the Rebecca Sequence is due to commence shortly, alongside the Company’s next RC drilling program at Lighthorse. These programs will continue to systematically test the broader discovery potential across Pinjin.”
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What aircore drilling reveals — and why it matters for gold discovery
Aircore drilling is a low-cost, wide-spaced first-pass technique used to screen large areas of ground for geochemical signals before committing to more expensive, targeted drilling. Holes are drilled at relatively shallow depths — averaging just 32 m here — to sample regolith material and detect gold dispersion halos that may indicate mineralisation at depth.
The detection threshold matters. Regional laterite and ferricrete background gold values across the Yilgarn Craton are generally below 2 ppb Au, meaning the 20 ppb cumulative down-hole threshold applied at the LTZ Flexure represents approximately 10 times background. This provides a conservative threshold that defines a meaningful signal. The use of low-level gold anomalism for target definition is well established in Yilgarn regolith exploration, where values above this level can define coherent, mappable geochemical halos that strengthen toward underlying mineralisation, as referenced by KalGold with peer-reviewed literature in the announcement.
Individual assay results were generally subdued, consistent with the shallow, first-pass nature of the program — this is expected and normal. The analytical power lies in the cumulative down-hole response across multiple holes, which defines coherent zones of anomalism over hundreds of metres of strike, providing clear drill targets rather than isolated anomalies.
Three layers of geological significance emerged from the spatial analysis:
- Gold anomalism follows the strike of magnetic units interpreted from regional aeromagnetic datasets, with trends varying from north-westerly in the northern part of the drill grid to approximately north-south in the south — mirroring the geometry of the LTZ Flexure itself
- Offsets of magnetic units, analogous to those observed at the Kirgella Gift deposit and interpreted as fault structures, locally coincide with gold anomalism
- Zones of reduced or variable magnetic response along strike also locally coincide with gold anomalism, potentially representing areas of demagnetisation associated with mineralising fluids
Together, these spatial relationships suggest the gold anomalism may reflect underlying geological and structural controls, providing vectors toward potential primary orogenic gold mineralisation at depth.
Rebecca Sequence adds a second discovery vector
The LTZ Flexure program area covers a geological transition point where the LTZ changes orientation from NW-SE to N-S, juxtaposing two distinct rock sequences. The Pinjin Sequence — which hosts KalGold’s Kirgella Gift deposit and Lighthorse gold prospect — sits to the west. The Rebecca Sequence lies to the east, largely concealed beneath transported cover within the program area, with only a small portion intersected by drilling in the north-east of the drill grid.
That limited Rebecca Sequence drilling returned low-level gold anomalism, with multi-element data indicating a possible association between gold and antimony. This contrasts with the gold-arsenic association observed within the Pinjin Sequence — a distinction that, according to Figure 2 of the announcement and its caption, is visible in the multi-element geochemistry maps across the drill grid.
The strategic context is significant: the Rebecca Sequence hosts gold mineralisation at Ramelius Resources’ (ASX: RMS) Rebecca Gold Project approximately 16 km to the south along strike. The comparison between the two sequences is summarised below.
| Feature | Pinjin Sequence | Rebecca Sequence | Significance |
|---|---|---|---|
| Hosts | Kirgella Gift, Lighthorse | RMS Rebecca Gold Project (along strike) | Two separate mineralised systems |
| Gold association | Arsenic (As) | Antimony (Sb) — possible association | Different pathfinder chemistry |
| Status | RC drill targets defined | First-pass aircore commencing ~mid-October 2026 | Early-stage but encouraging |
First-pass aircore drilling of the Rebecca Sequence is scheduled to commence around 16 October 2026, extending north and northeast of the current LTZ Flexure grid.
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Drilling pipeline building toward the next discovery at Pinjin
Two drill programs are scheduled to commence in mid-October 2026, continuing the systematic exploration of the broader Pinjin Gold Project:
- RC drilling at Lighthorse (~3 km northwest of the LTZ Flexure): targeting extensions to high-grade gold intercepts in fresh rock; scheduled to commence around 10 October 2026
- First-pass aircore drilling of the Rebecca Sequence: extending the program north and northeast of the current LTZ Flexure grid; scheduled to commence around 16 October 2026
The Lighthorse drilling programme has already extended the known strike to 1,450 m, with the upcoming RC campaign targeting further extensions to high-grade intercepts in fresh rock beneath the existing footprint.
Commencement of both programs remains subject to the timely reopening of the Kurnalpi-Pinjin Road by the City of Kalgoorlie-Boulder, following unseasonal heavy rainfall across the Pinjin area in late September 2026 that resulted in road closures throughout the Eastern Goldfields.
The Pinjin Gold Project sits approximately 140 km northeast of Kalgoorlie-Boulder within the 30 Moz Laverton Tectonic Zone, a major crustal-scale structure that hosts numerous significant gold deposits across the Eastern Goldfields. The project is located approximately 25 km north along strike from Ramelius Resources’ Rebecca Gold Project, where a definitive feasibility study has been completed and mining is targeted for the December 2027 quarter (per ASX: RMS, 28 October 2025).
KalGold’s existing JORC resources — Kirgella Gift and Providence (2.34 Mt at 1.0 g/t Au for 76,400 oz) and La Mascotte (3.61 Mt at 1.19 g/t Au for 138,000 oz) — bring the company’s total gold resource to in excess of 214,000 oz. The LTZ Flexure program does not add to these figures; it opens the next chapter of discovery potential at Pinjin.
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