Kalgoorlie Gold Mining has significantly expanded its Lighthorse prospect within its Pinjin gold project, 140 kilometre northeast of Kalgoorlie in Western Australia’s prolific Laverton Tectonic Zone.
A recent air core drilling campaign, comprising 99 holes for 4710 metres, has more than doubled the strike length of Lighthorse to 1450m from an initial 600m.
This program identified a second strong gold anomaly 800m north of the original discovery and confirmed mineralisation up to 1150m wide along cross-cutting structures.
The expanded footprint now exceeds KalGold’s nearby Kirgella Gift and Providence deposits, which host a JORC inferred mineral resource of 2.34 million tonnes at 1 gram per tonne (g/t) gold for 76,400 ounces.
Key intercepts include 15m at 0.41g/t gold from 36m and 25m at 0.21g/t gold from 28m, both ending in mineralisation, suggesting potential for higher-grade zones at depth.
The gold is primarily hosted in a dacitic sequence, with thicker intercepts near lithological contacts with ultramafic units, influenced by cross-cutting structures identified through geophysical reinterpretation.
Gold anomalism extends along 6km of the Lighthorse Corridor, based on the integration of historic and recent drilling data, with minor gaps due to limited drilling coverage.
Multi-element geochemistry, including arsenic and antimony enrichment, aligns with gold trends, particularly near Providence South, reinforcing the region’s prospectivity.
Kalgoorlie Gold Mining managing director Matt Painter said: “This air core drill program has successfully validated KalGold’s geological model, identifying a substantial strike length of strongly anomalous gold mineralisation over approximately 1500m and identifying lower-level gold anomalism for another 500m along strike.”
Painter said that when combined with earlier data, including the very high-grade initial discovery intercepts, the size, distribution and intensity of gold mineralisation at Lighthorse is consistent with the potential for significant gold mineralisation at depth.
KalGold’s systematic exploration approach, using a 0.1g/t cut-off for significant intercepts and tracking 50 parts per billion gold distribution, highlights vectors towards primary mineralisation targets.
The company believes the extensive anomalism indicates a potential gold camp hidden beneath cover at Pinjin.
To capitalise on this, KalGold is preparing its most extensive reverse circulation drilling program to date to target the new northern and southern anomalies, fill in the Lighthorse discovery zone and test shallow anomalies at the company’s nearby Wessex prospect.
Additionally, diamond drilling, co-funded by a WA Government Exploration Incentive Scheme grant, will commence this quarter to test a structural intersection between Kirgella Gift and Providence. KalGold aims to complete the project by November.
The Pinjin project’s prospectivity is further underscored by untested targets, including the Southern Gap, Northern Lighthorse extension and areas along strike from the Anglo Saxon gold mine.
The Eastern Flexure Zone and Rebecca Sequence, which potentially correlate with Ramelius Resources’ 1.4-million-ounce Rebecca deposit 19km south, also offer significant opportunities.
With only 10 per cent of conceptual targets drill-tested, KalGold’s systematic methodology continues to yield new prospects, positioning the project as a high-potential exploration hub.
KalGold’s expanded Lighthorse prospect signals a promising future for the Pinjin project. With robust drilling plans and a strategic approach, the company is well-placed to unlock further value in this richly endowed gold region.
Is your ASX-listed company doing something interesting? Contact: matt.birney@businessnews.com.au
By Doug Bright
