52m at 2.77g/t Au Extends Lone Sister Gold Mineralisation Beyond Resource

Expanding the Gold Footprint at Lone Sister

GBM Resources Limited (ASX:GBZ) has delivered promising early results from its latest drilling campaign at the Lone Sister deposit, part of the Twin Hills Gold Project in Queensland's Drummond Basin. The company announced assay results from two of three initial drill holes, revealing broad zones of high-grade gold mineralisation outside the boundaries of the existing Mineral Resource Estimate (MRE).

Notably, drill hole LSDH002 intersected 52 metres at 2.77 grams per tonne (g/t) gold starting from 299 metres depth, including a standout 1 metre interval grading 43.04 g/t gold. These intercepts lie beyond the previously defined resource, suggesting the deposit’s potential is larger than earlier understood.

A New Geological Chapter – East-West Structure

Beyond the impressive grades, the drilling has confirmed a newly interpreted east-west structural feature associated with high-grade gold mineralisation. This structure had not been identified or targeted in prior exploration efforts, marking a significant advancement in understanding the deposit’s geology. The discovery supports continuity of high-grade mineralisation and opens new avenues for resource expansion.

GBM’s CEO Daniel Hastings highlighted the importance of this finding, noting that the new drilling orientation and structural interpretation have enhanced the geological model and revealed two distinct mineralisation styles – quartz vein low sulphidation epithermal and mineralised rhyolite typical of intrusive-related gold deposits. This dual style recognition could broaden exploration targets within and beyond the current resource footprint.

Ongoing Drilling and Broader Project Context

The company has completed approximately 1,645 metres of a planned 2,160 metres drilling program at Lone Sister, with assays pending for the third hole (LSDH003). Additionally, drilling is underway at the nearby 309 deposit, where about 1,500 metres of a 6,550 metres program have been drilled, aiming to test high-grade quartz-sulphide mineralisation continuity and extend the resource.

GBM’s Twin Hills Gold Project currently holds an estimated 1.0 million ounces of gold in resources, with the Lone Sister deposit contributing approximately 0.48 million ounces. The new results, combined with ongoing metallurgical test work and geological studies, are expected to inform an updated mineralisation model and resource estimate in due course.

Implications for GBM’s Growth Strategy

This drilling success follows GBM’s restructuring earlier in 2025 and underscores the company’s commitment to advancing its Queensland gold assets. The identification of previously unrecognised mineralisation zones and structural controls enhances the prospectivity of the Twin Hills project and could translate into significant value uplift if the resource base expands materially.

Investors and analysts will be watching closely as further assay results emerge and the company refines its geological understanding. The combination of high-grade intercepts and new structural insights positions GBM well to unlock additional ounces and potentially extend mine life at Lone Sister and 309.