Tambourah Metals Drills for Depth Extension of 169g/t Bonanza Gold Hit
Key Takeaways
- Tambourah Metals (ASX: TMB) has commenced a five-hole, ~1,500m diamond drilling program at Beatty Park Sth, 160km north of Meekatharra, targeting depth extensions up to 250m below prior aircore intercepts.
- The program is chasing two headline aircore results: 6m at 25.8g/t Au (including 1m at 126g/t Au) and 10m at 38.9g/t Au (including 1m at 169g/t Au) — exceptional grades for early-stage exploration.
- Diamond drilling was selected specifically because zero surface outcrop exists at Beatty Park Sth, making intact core the only way to map underground structural architecture and identify gold-bearing fluid pathways.
- The program is co-funded through the Western Australian Government's Exploration Incentive Scheme (EIS), reducing TMB's capital outlay and stretching the exploration budget further.
- Core will be transported to Perth for structural logging and assay, with results expected to inform a regional-scale targeting model across the broader Beatty Park Sth prospect.
Diamond drilling underway as TMB chases high-grade gold at depth
Tambourah Metals (ASX: TMB) has commenced an Exploration Incentive Scheme (EIS) co-funded diamond drilling program at its Beatty Park Sth gold prospect, located 160km north of Meekatharra in the Peak Hill district of Western Australia. The program comprises five diamond drillholes totalling approximately ~1,500m (including precollars), targeting high-grade depth extensions up to 250m below near-surface aircore intercepts that returned some remarkable early-stage gold grades.
The two headline aircore results the program is designed to chase at depth are:
- 6m at 25.8g/t Au from 30m, including 1m at 126g/t Au from 30m (BPAC016)
- 10m at 38.9g/t Au from 22m, including 1m at 169g/t Au from 25m (BPAC028)
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What makes Beatty Park Sth a high-priority gold target
Geology and mineralisation setting
Gold mineralisation at Beatty Park Sth is hosted within strongly altered ultramafic rocks of the Narracoota Formation. The alteration suite observed across prior aircore and RC drilling campaigns includes chlorite, carbonate, sericite, silica, and pyrite.
This combination is consistent with the hydrothermal alteration footprints characteristic of orogenic gold systems. Orogenic gold deposits form through deep crustal fluid flow along major structural corridors and are the geological family responsible for many of Western Australia’s most significant gold endowments. The presence of this alteration signature across the prospect suggests this is not a shallow, isolated anomaly but a system with the hallmarks of broader scale potential.
Why diamond drilling — and what it tells us
Most investors are familiar with aircore and RC (reverse circulation) drilling, which are fast and cost-effective methods for early-stage sampling. Diamond drilling is different: it recovers an intact cylinder of rock (called core) from the drillhole, rather than just rock chips. That core gives geologists far more information to work with.
At Beatty Park Sth, this distinction matters for one specific reason: there is zero surface outcrop across the target area. With no rocks exposed at the surface, the only way to understand the structural architecture underground is to extract and physically examine core samples. The diamond core will reveal the orientation of mineralised structures, the pathways through which gold-bearing fluids travelled, and the geological traps where gold may have concentrated at depth.
That structural data becomes the blueprint for every subsequent drill program across the broader project. The EIS co-funding structure, a Western Australian Government scheme that partially reimburses eligible exploration expenditure, means this foundational data step carries a reduced cost burden for TMB shareholders.
Five holes designed to test 250m of untested depth
All five planned holes are targeting 300m final depth, dipping at -60°, with four holes oriented at 225° azimuth and BPRD005 at 45° azimuth. The program is designed to test the down-dip and depth extensions of the high-grade aircore intercepts identified in prior campaigns.
| Hole No | Dip | Azimuth | Final Depth (m) | Target |
|---|---|---|---|---|
| BPRD001 | -60° | 225° | 300 | Depth extension of high-grade aircore intercepts |
| BPRD002 | -60° | 225° | 300 | Depth extension of high-grade aircore intercepts |
| BPRD003 | -60° | 225° | 300 | Depth extension of high-grade aircore intercepts |
| BPRD004 | -60° | 225° | 300 | Depth extension of high-grade aircore intercepts |
| BPRD005 | -60° | 45° | 300 | Depth extension of high-grade aircore intercepts |
Following commencement of drilling, the company outlined the immediate next steps:
- Preliminary logging is currently being completed on-site
- Core will be securely transported to Perth for comprehensive structural logging, cutting, and assay sampling
- Results are expected to inform the structural model and guide regional-scale target generation across the broader prospect
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Investment thesis — why this drill program matters for TMB
Three angles frame the investment case here.
Grade quality is the starting point. Near-surface intervals of 6m at 25.8g/t Au and 10m at 38.9g/t Au, with bonanza hits to 169g/t Au, are exceptional numbers for early-stage exploration. Gold at these grades over meaningful widths is unusual this early in a program. If the diamond drilling confirms that mineralisation extends to depth with comparable grade, that outcome would be material for a company of TMB’s current size.
Structural data is the second lever. This program is not solely about gold assay results. The core recovered from these five holes will provide the first detailed picture of underground structural architecture at Beatty Park Sth. That knowledge base will inform how the company targets subsequent drilling campaigns across the broader region, effectively multiplying the value of the information gained from a single program.
Capital efficiency rounds out the picture. EIS co-funding from the Western Australian Government partially offsets TMB’s exploration costs on this program, stretching the company’s exploration budget further than an unfunded equivalent program would allow.
No management quote was included in this announcement, so none has been reproduced here.
Beyond Beatty Park Sth, TMB maintains a multi-project exploration portfolio spanning the Tambourah, Shaw River, Speewah Nth, and Bryah/Murchison projects, targeting gold and critical minerals across Western Australia. Assay results from the current diamond drilling program will be a key near-term catalyst to watch.
TMB’s exploration activity extends beyond gold, with a high-grade antimony discovery at one of its Australian projects adding a critical minerals dimension to a portfolio that already spans gold targets across multiple Western Australian tenements.
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