Tambourah Metals Partners with CSIRO to Boost Lithium Exploration in Pilbara Using Advanced Remote Sensing

Extensive Pilbara Lithium Portfolio Rooted in Historical Mineral Production

Tambourah Metals maintains a substantial exploration footprint exceeding 400 square kilometres in Western Australia's Pilbara region, strategically located over sites with a rich history of alluvial tin and tantalum mining. Its critical minerals portfolio includes four principal project areas: Eley's, Coondina, Haystack Well, and Kurrana, each with documented past production of tin, tantalum, and associated minerals. These areas provide a strong geological foundation for targeting pegmatite-hosted lithium deposits, as the company notes these alluvial deposits originate from extensive pegmatite systems that have not been systematically explored for lithium in recent years.

The pegmatite systems within Tambourah's tenure are linked to discrete bodies of the highly fractionated Split Rocks Supersuite, containing mineral assemblages such as tin, tantalum, niobium, gadolinium, zirconium, and beryllium. These polymetallic pegmatite environments signal promising lithium mineralisation potential, although historical exploration primarily focused on alluvial and near-surface deposits rather than systematic lithium targeting. Tambourah's current exploration strategy leverages this geological context by applying technology-driven prospectivity mapping and machine learning techniques to identify primary lithium-bearing pegmatite sources at depth.

CSIRO Partnership and Integration of Remote Sensing Technologies

The collaboration between Tambourah Metals and CSIRO combines complementary strengths to modernise exploration approaches across challenging Pilbara terrain. CSIRO contributes advanced remote sensing and machine learning expertise, while Tambourah offers regional geological insights, historical data, and on-ground exploration experience. This alliance is formalised through a collaboration agreement detailing shared goals to develop refined lithium pegmatite prospectivity maps and pinpoint priority exploration targets within Tambourah's tenements.

A pivotal early step involves a high-resolution hyperspectral survey conducted by HyVista over the Coondina tenements, which began in late July 2026. Hyperspectral imaging captures detailed spectral signatures of rock and mineral compositions across extensive areas, generating datasets that highlight mineralogical variations indicative of lithium-bearing pegmatites. This survey data will underpin CSIRO's machine learning algorithms, facilitating the identification of the most prospective zones and enabling Tambourah to focus exploration efforts efficiently rather than relying on broad conventional methods.

Machine Learning-Driven Prospectivity Mapping to Target Lithium Pegmatites

The core technical approach of the CSIRO collaboration involves integrating diverse datasets into machine learning algorithms tailored for lithium pegmatite prospectivity assessment. Surface sampling data from Tambourah's existing programs, combined with the high-resolution hyperspectral information, will be processed to generate predictive maps highlighting the highest lithium potential areas across the Pilbara projects. This method aims to mitigate exploration risks by directing fieldwork towards scientifically identified targets instead of depending solely on traditional geological interpretations or historical mining sites.

This prospectivity mapping offers operational and financial efficiencies by shortening the timeline and lowering costs to advance priority targets from identification to advanced exploration. By concentrating sampling and field investigations on algorithm-identified hotspots, Tambourah can optimise exploration budgets and accelerate evaluation of high-potential pegmatite terranes that remain largely unexplored for lithium. Executive Chairperson Rita Brooks stated the collaboration will "accelerate the identification of early-stage, high-priority lithium bearing pegmatites and other critical minerals within Tambourah's Pilbara projects," underscoring the company's commitment to leveraging technology to unlock lithium potential across its extensive tenure.

Support from CSIRO Kick-Start Program Enhances Funding

Tambourah Metals has been awarded a Kick-Start voucher from CSIRO's Kick-Start program, which supports Australian start-ups and SMEs aiming to grow their businesses through access to CSIRO's research expertise and resources. This voucher provides subsidised access to CSIRO's technical capabilities and scientific personnel, significantly lowering the financial barriers typically associated with engaging a national science agency. This funding mechanism enables smaller exploration companies like Tambourah to utilise world-class research and development resources that might otherwise be cost-prohibitive.

The Kick-Start initiative aligns with CSIRO's mission to foster Australian private sector innovation and commercialisation, particularly in the exploration and resources sectors where advanced technologies can enhance outcomes. For Tambourah, the voucher substantially improves the financial viability of the collaborative project by subsidising the development and training of machine learning algorithms, a major expense if sourced commercially. This support allows a more comprehensive and resource-intensive prospectivity mapping exercise than budget constraints would typically permit.

Tambourah Metals' Integrated Gold and Critical Minerals Growth Strategy

Founded in 2020, Tambourah Metals is a Western Australia-focused explorer with dual objectives targeting gold and critical minerals development. The company is advancing gold projects in the Tambourah Goldfields and Bryah Basin within the Murchison Region, while expanding its critical minerals footprint through the Pilbara portfolio and Speewah North projects in the East Kimberley. Since listing on the ASX, Tambourah has steadily increased its critical minerals landholdings and identified prospectivity for antimony, silver, copper, and gold across multiple projects.

This diversified portfolio positions Tambourah to capitalize on the growing global demand for lithium, tantalum, and related battery metals. The company's focus on exploration efficiency through technology adoption, exemplified by the CSIRO collaboration, reflects a management strategy aimed at advancing multiple projects within disciplined capital frameworks. By combining traditional gold exploration expertise with emerging critical minerals capabilities, Tambourah is building a multi-commodity asset base across Western Australia's diverse geological terranes.

Addressing Regional Exploration Challenges with Technology

Lithium exploration in the Pilbara faces significant challenges including difficult terrain, sparse outcrops, deep weathering obscuring primary mineralisation, and the vast scale of pegmatite systems. Conventional field geological mapping and sampling, while essential, are limited by resource constraints when applied over hundreds of square kilometres. Remote sensing and machine learning technologies provide rapid, cost-effective screening solutions to identify the most prospective zones for focused fieldwork.

Hyperspectral imaging is particularly effective for recognizing lithium-bearing pegmatites, as lithium minerals exhibit distinct spectral signatures detectable and mappable across entire tenement areas. The CSIRO collaboration's machine learning algorithms enhance this capability by detecting subtle spectral and spatial patterns indicative of high lithium potential that may not be evident through visual analysis alone. This innovative approach is especially valuable in the Pilbara, where challenging terrain and under-explored pegmatites demand advanced exploration methodologies.

Global Critical Minerals Demand and Strategic Investment Timing

Tambourah's lithium exploration expansion aligns with a global surge in demand for lithium and other battery-critical minerals, driven by renewable energy transitions and electric vehicle growth. Australia's established lithium production and mineral endowment offer a competitive advantage for explorers identifying new resources. Despite its historical focus on tin and tantalum, the Pilbara remains relatively under-explored for lithium compared to other Australian regions, presenting a significant opportunity for explorers targeting primary lithium pegmatites.

Tambourah's adoption of advanced exploration technologies and partnership with CSIRO reflect strategic recognition of this market opportunity and the benefits of rapid target identification. The company's embrace of machine learning and remote sensing underscores a commitment to efficient, risk-mitigated exploration. Investors will likely monitor how effectively the company converts prospectivity mapping results into field exploration successes and ultimately into mineral resource estimates demonstrating economic viability.

Upcoming Exploration Milestones and Future Plans

The HyVista hyperspectral survey completion over Coondina tenements in late July 2026 marks the initial milestone of the collaboration. Post-survey, Tambourah and CSIRO will process and interpret the hyperspectral data, integrating it with surface sampling and geological datasets to feed machine learning algorithms. The resulting prospectivity maps will define priority targets to guide subsequent field programs, including targeted sampling, geological mapping, and potential geophysical surveys to evaluate specific pegmatite systems identified by the analysis.

While specific timelines for completing prospectivity mapping and commencing follow-up fieldwork have not been disclosed, the collaboration aims to enhance target prioritisation and reduce exploration time and costs. Machine learning outputs are expected to inform strategic exploration decisions across Tambourah's Pilbara portfolio. Stakeholders should watch for future updates detailing prospectivity results, target prioritisation, and exploration budget allocations.

Exploration Risks and Uncertainties

Operating in the minerals exploration sector, Tambourah Metals faces inherent uncertainties related to mineral discovery, resource delineation, and commercial viability. The company's forward-looking statements acknowledge that actual outcomes may differ materially due to numerous risks beyond management control. While machine learning and remote sensing offer methodological advantages, they do not guarantee discovery or economic lithium resources. Prospectivity mapping guides target selection but requires validation through field exploration, drilling, and resource estimation.

Additional risks include reliance on tenure access subject to renewal and regulatory compliance in Western Australia, funding availability, and shareholder support. The Pilbara's remoteness and harsh environment pose logistical and cost challenges. Commodity price volatility, especially for lithium and related minerals, adds economic uncertainty. The company's disclaimers clarify that exploration results represent interpretations subject to further verification and do not constitute mineral resource estimates or assurances of mineralisation.