Great Dirt Resources Uncovers Multiple Lithium Targets at Pilbara Project; NSW Manganese Assays Hit 55.1%

Pilbara Lithium Project Exhibits Geological Similarities to Nearby Producing Mines

Great Dirt's Pilbara Project (E45/6863) spans 67 square kilometres in Western Australia’s premier lithium region. Situated approximately 43 kilometres from Pilbara Minerals' (ASX:PLS) Pilgangoora Lithium Project and adjacent to tenure held by Wildcat Resources and Sayona Mining (ASX:SYA), the location offers proximity to established mining infrastructure and proven lithium mineralisation.

A comprehensive geophysical review during the June 2026 quarter revealed that the tenement shares key geological characteristics with nearby lithium operations such as Pilgangoora and Tabba Tabba. The project area is interpreted to lie on the edge of potentially fertile granite, a geological setting conducive to lithium-cesium-tantalum (LCT) pegmatite mineralisation. This strengthens the case for lithium discovery within Great Dirt’s exploration package and underpins planned field activities.

Geophysical Survey Highlights Two Granite Bodies and Potassium Anomalies

The quarter’s geophysical review integrated aeromagnetic, radiometric, gravity, elevation, and satellite data to enhance target generation at the Pilbara Project. Analysis identified two granite bodies distinguished by gravity data and magnetic signatures: a southern body with muted magnetic response and a northern body exhibiting a more random magnetic texture. These contrasting signatures suggest varying granite compositions and differing potential for lithium pegmatite mineralisation.

Potassium radiometric data revealed zones of potassic rocks, indicative of biotite or muscovite enrichment around lithium pegmatites or fertile granite hosts, serving as exploration vectors. These potassium anomalies coincide with interpreted geophysical features such as East-West regional dykes, LCT geochemical markers, elevated Li2O levels, and mapped pegmatitic occurrences at targets K2, K3, K6, and K9. Several targets remain unmapped and unsampled, presenting further exploration opportunities.

Multiple Coincident Targets Shape Follow-Up Exploration Strategy

Great Dirt identified multiple coincident geophysical, structural, and geochemical targets, labeled K1 through K10, during the quarter. These represent priority zones where integrated data indicate favorable conditions for lithium pegmatite mineralisation, reinforcing the rationale for field exploration.

In response, the company plans an enhanced soil sampling and detailed mapping campaign during the current quarter to test pegmatite occurrences and refine drilling targets. This systematic approach aims to prioritize high-potential areas, reduce drilling risk, and validate remote sensing interpretations, potentially revealing additional mineralisation surface expressions.

High-Grade Manganese Assays at NSW Projects Post-Quarter

Great Dirt’s Doherty and Basin manganese projects in northern New South Wales (EL 9527), near Barraba, have a history of manganese mining dating back to 1941. Over two decades, Doherty produced approximately 9,000 tonnes of battery and metallurgical grade manganese from both open-cut and underground operations. Battery grade ore was supplied to Eveready in Sydney for dry cell batteries, while metallurgical grade ore was sold to BHP for steel production, demonstrating the area's economic manganese potential.

Following the quarter’s end on 30 June 2026, rock chip sampling from Doherty and Basin returned assays up to 55.1% manganese. These high-grade results validate the manganese mineralisation potential and support prioritization for further exploration. Historical work likely did not identify all manganese sources, as high-grade manganese floaters found outside known mines suggest undiscovered mineralisation extensions along strike.

NSW Manganese Follow-Up Field Programs in Preparation

During the quarter, Great Dirt advanced planning for follow-up exploration at Doherty and Basin, aiming to build on historical mining and exploration data. The upcoming fieldwork will assess known manganese occurrences, historical workings, and newly identified targets from recent sampling.

Scheduled for the September 2026 quarter, this follow-up field program will refine exploration targets and prioritize zones for future activity. The approach emphasizes validating historical and recent data to identify the most prospective areas for intensified exploration.

Robust Cash Position Supports Exploration Initiatives

As of 30 June 2026, Great Dirt held $3.8 million in cash, maintaining a strong financial position. Quarterly cash outflows aligned with management expectations, ensuring adequate funding for ongoing activities, including the Pilbara soil sampling and NSW manganese fieldwork.

This cash reserve offers financial flexibility to advance exploration without immediate capital raising, supporting planned programs in the September 2026 quarter and enabling evaluation of additional project opportunities. The ability to self-fund exploration without shareholder dilution is a strategic advantage as the company pursues near-term milestones across its lithium and manganese assets.

Ongoing Evaluation of Project Acquisition Prospects

Beyond current exploration, Great Dirt continued reviewing potential project acquisitions during the quarter. While specific details on these opportunities remain undisclosed, the company’s strong balance sheet and exploration expertise position it well to pursue assets aligned with its lithium and manganese focus.

This dual strategy of active exploration and acquisition aims to enhance shareholder value by advancing projects toward discovery or development. Management’s confidence in the company’s direction and financial health suggests potential future announcements regarding significant acquisitions or transactions.

Shareholder Meeting Achieves Unanimous Approval

During the quarter, Great Dirt conducted a general meeting where all resolutions were passed on a poll. Although details of the resolutions were not disclosed, the unanimous approval reflects strong shareholder endorsement of management’s strategic and corporate plans.

This mandate empowers management to execute the company’s exploration strategy and corporate initiatives, removing obstacles to planned programs and activities throughout 2026.

Strategic Timing Amidst Growing Lithium Market Demand

Great Dirt’s Pilbara lithium exploration aligns with sustained global demand for lithium driven by battery technology and energy transition trends. The Pilbara region is a significant lithium production hub, hosting projects like Pilgangoora and other advanced developments near Great Dirt’s tenement. This regional context enhances the prospectivity of Great Dirt’s assets and offers a proven model for lithium extraction.

The scheduled enhanced soil sampling and mapping in the September 2026 quarter aims to generate field-validated targets that could lead to drilling programs if results prove promising. This methodical approach combining multi-disciplinary data and field validation exemplifies best practice exploration. Investors should monitor upcoming results for progress toward drilling-stage targets within the current fiscal year or early 2027.