Javelin Minerals Drills Deep Beneath Kalgoorlie Gold Deposit to Test Untapped Source
Key Takeaways
- Diamond drilling commenced 2 September 2026 at Javelin Minerals' Coogee Gold Project, 55km south-east of Kalgoorlie, targeting two deep intrusive gold-copper anomalies at Coogee North and Coogee West.
- Both holes are planned to between 800m and 1,000m depth — the first deep drilling ever conducted to test the source of these magnetic anomalies at Coogee.
- The program is co-funded through the WA Government Exploration Incentive Scheme (EIS), reducing the capital burden on Javelin for what is otherwise capital-intensive deep drilling.
- Coogee North sits directly beneath an existing JORC Mineral Resource of 3.6Mt at 1.08g/t Au for approximately 127,000 ounces of gold, giving the deep target geological credibility rather than pure speculation.
- The 5 to 6 week program timeline provides investors a defined news flow window, with Coogee North assay results the first material catalyst to watch.
Diamond drilling underway at Coogee gold-copper project
A diamond drill rig has commenced at Javelin Minerals’ Coogee Gold Project, 55km south-east of Kalgoorlie, targeting two major intrusive gold-copper anomalies at Coogee North and Coogee West. The program began on 2 September 2026, with both holes planned to between 800m and 1,000m depth.
The first hole, targeting Coogee North, is now underway. Coogee West will follow once the initial hole is complete. The program is co-funded through the WA Government Exploration Incentive Scheme (EIS), with Westralian Diamond Drilling of Kalgoorlie undertaking the work across a planned 5 to 6 week program duration.
The Coogee Gold Project already hosts an existing JORC Mineral Resource of 3.6Mt at 1.08g/t Au for approximately 127,000 ounces of gold and a separate copper resource of 1.0Mt at 0.41% Cu for 4,122 tonnes of copper. This drilling program is designed to test the deeper source of mineralisation beneath and adjacent to that existing resource base.
| Target | Hole Type | Planned Depth | Total Program Length | Funding Support |
|---|---|---|---|---|
| Coogee North | Diamond | 800–1,000m | 5–6 weeks | WA EIS co-funded |
| Coogee West | Diamond | 800–1,000m | WA EIS co-funded |
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What makes Coogee North and Coogee West compelling targets
Both targets feature large-scale magnetic anomalies that sit directly beneath and alongside zones of historic shallow gold-copper mineralisation. The key word here is “untested” — no deep drilling has ever been conducted to test the source of these anomalies, which means the geology at depth remains genuinely open.
A magnetic inversion model is a 3D representation of underground rock bodies derived from surface geophysical measurements, used to infer where dense or magnetically distinct rock masses may sit at depth. At Coogee North, the anomaly identified through this modelling has a magnetic response consistent with a magnetite-component alteration signature — the same style of alteration associated with gold-copper mineralisation observed at shallow levels. That geological consistency gives the deeper target credibility rather than making it purely speculative.
Critically, the Coogee North anomaly sits directly beneath the majority of the existing JORC Mineral Resource. For investors, that spatial relationship matters: drilling is not searching in a blank area but probing beneath a zone already known to carry gold-copper grades. Coogee West presents a different but complementary case, with extensive bedrock gold anomalism identified in historic shallow drilling pointing to a broader, untested mineralised system.
The Coogee West drill targets were identified through a combination of historic shallow bedrock gold anomalism and geophysical modelling, with that earlier target-generation work directly informing the hole design now being executed.
Intrusive-related gold-copper systems are deposits where mineralisation is genetically linked to a cooling igneous intrusion at depth, often producing large, lower-grade but potentially bulk-tonnage targets. When large magnetic anomalies at depth coincide with shallow mineralisation of this style, they represent genuine upside optionality — the question the drill program is now asking is whether the anomaly source is a mineralised intrusive body.
WA Government co-funding reduces exploration risk
Drilling two holes to between 800m and 1,000m depth is capital-intensive work. The co-funding secured through the WA Government Exploration Incentive Scheme (EIS) is a meaningful factor here — it enabled Javelin to commit to holes of this ambition that might otherwise have been difficult to fund independently.
The 5 to 6 week program timeline gives investors a clear window for news flow. Results from Coogee North will be the first material update to watch, with the Coogee West hole to follow.
Mark Cossom, General Manager of Resources and Exploration, Javelin Minerals
“It’s great to finally be underway with the drilling of these two ambitious holes. Javelin has been building these targets up and awaiting the ability to test them with diamond drilling… While they are conceptual targets, their magnetic response is consistent with what we have seen in alteration minerals associated with gold-copper mineralisation at Coogee North, and there is extensive near-surface anomalism at both Coogee North and Coogee West.”
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What investors should watch for as drilling progresses
These are conceptual, first-pass deep targets — geologically well-supported, but the outcome remains uncertain. That is the nature of early-stage exploration at this depth and scale. Investors should frame this as high-risk, high-reward work that the existing geology justifies pursuing.
Key milestones to monitor over the coming weeks include:
- Downhole assay results from the Coogee North hole
- Confirmation of Coogee West hole commencement once the first hole is complete
- Any announcement of a significant intersection at either target during the program
- Final program results once both holes have reached planned depth
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