Exploration Licence 08/3737 Gorge is located approximately 110 km west of the town of Paraburdoo in Western Australia. Gorge covers an area of 81 km² of Proterozoic age metasediments of the Capricorn Orogen and is prospective for several styles of mineralisation.

Historical records show sporadic exploration was carried out across the Gorge licence in the mid to late 1980s and late 2000s. This work identified several areas with rock chip results peaking at 134 g/t gold, with mineralisation observed over approximately 5 km of strike.

In the late 1800s, small-scale miners were active across the licence area collecting alluvial and elluvial gold from within and adjacent to dry stream beds. During this time bedrock sources of primary gold mineralisation were discovered where shallow shafts were established and relatively high-grade gold ore was extracted.

Newspaper articles published in 1896 and 1897 report bedrock mineralisation at Gorge West extending for more than 1 km in length with extracted ore returning 14 oz gold per ton (+450 g/t gold). At Gorge East (104 Prospect) bedrock mineralisation extended for approximately 200m and extracted ore reported assays of 160 oz gold per ton (+5,000 g/t gold).

More modern exploration for precious metals commenced in the 1980s. Australian Anglo American Limited (AAL) evaluated the Gorge East area (104 Prospect) during 1985 with work including drainage sampling, rock chip sampling and soil sampling. Drainage sample results peaked at 192 ppb gold, soils up to 233,300 ppb gold (233 g/t gold), and rock chip samples up to 62 g/t gold. Limited drilling of seven RAB holes and seven diamond holes was completed which included documented results of 1m at 35 g/t gold from 1m (RABP005), and 1m at 4.7 g/t gold from 26m (DD006). At the time of the historical data review, accurate locations for certain drill holes could not be confirmed from the available records. Subsequent field reconnaissance has since confirmed historic drill collar locations at the 401 Prospect.

Following the positive results of Australian Anglo American Ltd at the Gorge East Prospect, and noting the gold potential of the broader geology, Metana Minerals NL (Metana) embarked on a regional heliborne drainage sampling programme along 100 km of strike covering approximately 2,000 square kilometres of the Capricorn Orogen from Gorge in the west to south of Paraburdoo in the east. Work was carried out during the mid to late 1980s. This was successful in generating more than 10 areas with elevated gold in streams across 100km of geological strike, including an area of around 5 km x 2 km within the current Gorge exploration licence. 

During the heliborne work historical alluvial and elluvial surface workings, and bedrock workings from the late 1800s were noted and mapped. More than 6 areas of surface workings across 5 km of strike were noted and results of drainage sampling across the licence included 163ppb gold, 138ppb gold, 137ppb gold, 106 ppb gold, 90ppb gold, and 82ppb gold with many other results greater than 10ppb gold.

During the 1990s small scale surface mining was carried out on alluvial and elluvial areas within the Gorge licence. No reliable production records are available from this period, however machinery and other infrastructure remaining on site suggests reasonable gold was being sourced, and satellite imagery shows several areas subject to machine working of surface material.
 
Between 2006 and 2010 Ashburton Resources Limited (Ashburton Resources) carried out reconnaissance rock chip sampling across several areas within the current Gorge project area, primarily concentrating on the Gorge West prospect. Rock chip sample results included 134 g/t gold, 11.7 g/t gold and 6.1 g/t gold. No further work was carried out by Ashburton Resources. These rock chip results, strike length of historic workings and footprint of elevated gold in drainage samples over an area of more than 2 square kilometres provide a compelling early-stage gold exploration target of significant size.

During the early 2020s small scale reconnaissance prospecting activities were completed across the Gorge licence. Several gold nuggets were collected ranging in size from <2g per piece to more than 100g. These were collected from alluvial areas within the Gorge West prospect. The proximity of the nuggets suggests that a primary bedrock gold source may be nearby.

The 2026 exploration programme commenced following the announcement on 13 April 2026, which outlined a structured work programme across the Gorge Project.

Field activities commenced in May 2026 and focused on validating historical exploration data, confirming historic workings and undertaking systematic geological mapping across key target areas. This marked the transition from desktop review into active field-based exploration.

Airborne geophysical surveys were completed during this period, including LiDAR, magnetic and radiometric datasets, supported by aerial photography. These datasets have provided a high-resolution framework for structural interpretation and have materially improved understanding of the project geology.

The high-resolution LiDAR and aerial photography survey over the full Gorge Project licence area was completed ahead of schedule in May 2026 by Aerometrex Ltd.

The results have materially improved GEO’s ability to identify and map key surface features across the Project, including historic workings, shafts, geological outcrops, access tracks and local topography.

Figure 1 below shows the LiDAR-derived digital terrain model across the Project area, including target areas, historical workings and the tenement outline, providing a significantly improved surface dataset for geological and logistical planning.

The airborne magnetic survey over the full Gorge Project licence area was completed in June 2026. The results are being used to enhance GEO’s understanding of the Project’s geology, structural framework, and potential controls on mineralisation.

Initial interpretation of the magnetic data has improved the definition of the previously recognised approximately 5 km trend of historical gold mineralisation and workings. This trend is now interpreted as a major northeast-trending structural zone, with areas of demagnetisation that may potentially be indicative of hydrothermal fluid flow associated with a significant gold system.

The mineralised gold trend is also interpreted to be offset by later northwest-trending structures. The intersection of these significant structures may represent important controls on gold mineralisation. Figure 3 below shows the magnetic survey results across the Project area, including the target areas, historical workings and tenement outline.

The airborne survey identified a new high-priority magnetic anomaly, MAG001, in the northwest of the tenement. The anomaly is strike-limited, has an amplitude of approximately 400nT, and 3D inversion modelling indicates a depth to top of approximately 300m beneath surface with significant vertical extent.

Importantly, MAG001 is coincident with a topographic anomaly identified from the recently completed LiDAR and aerial photography survey, with iron-oxide staining also observed at surface.

This combination of magnetic, topographic and surface alteration features is considered encouraging and may be consistent with features observed in certain intrusion-related gold systems, including the style of target GEO is actively evaluating at its Juno Project.

Figure 4 below shows the magnetic depth-slice and 3D inversion model for MAG001, which will now be assessed as part of the ongoing target refinement work.

Recent field reconnaissance undertaken between May and June 2026 has returned highly encouraging results across multiple target areas, further strengthening the exploration potential of the Gorge Project.

The work programme has confirmed significant field indicators across the Gorge Mine Prospect, 401 Prospect, and Central Zone Prospect, including visible gold in quartz vein material, historic hard-rock workings, copper-rich gossan mineralisation, and favourable structural geological features associated with gold systems.

The orientation soil geochemistry survey formed an important component of the May–June 2026 field programme and was designed to evaluate the effectiveness of soil geochemistry as an exploration tool across the Gorge Mine and 401 Prospect target areas.

Survey Highlights:

Field mapping identified evidence of a structurally controlled mineral system, including:

Importantly, visible gold was observed in quartz vein samples from all three prospect areas, including material associated with historic workings and mullock heaps adjacent to vertical shafts.

Samples of visible-gold-bearing material were provided by independent prospectors. These are considered encouraging and warrant controlled follow-up sampling and laboratory analysis.

Structural data collected during the programme will be integrated with recently acquired airborne geophysical datasets to refine exploration targeting and identify priority drill targets.

The Gorge Mine Prospect is the highest priority target area within the Gorge Project and has returned some of the most compelling indicators of high-grade gold mineralisation. Historical records combined with recent field reconnaissance undertaken highlight significant potential for further exploration.

Historic records indicate:

Recent reconnaissance confirmed:

Visible gold was observed in quartz vein samples sourced from historic mullock heaps adjacent to vertical shafts. While these samples were not collected under GEO’s standard procedures and require controlled laboratory verification, they provide strong encouragement regarding the prospectivity of the Gorge Mine area. Historic records combined with field observations confirm the presence of significant historic hard-rock mining activity, sulphide-bearing quartz veining, and extensive alteration zones.

The Gorge Mine Prospect will be prioritised for controlled sampling of historic workings and mullock heaps. Results will be integrated with geological and geophysical datasets to refine structural interpretation and define drill targets.

Key Highlights:

Geological mapping at the 401 Prospect identified extensive quartz veining and associated alteration. The presence of pyrite within the surrounding wall rock further supports the existence of a hydrothermal mineralising system and provides important vectors for future exploration targeting.

Visible gold observed in quartz vein material, while requiring controlled laboratory verification, is considered highly encouraging and is consistent with the presence of a mineralised quartz vein system associated with historic workings.

The validation of historic drill hole locations has enabled legacy exploration data to be accurately incorporated into GEO Exploration Limited’s geological model. This significantly improves confidence in the geological framework and supports more robust targeting of future exploration work.

The results from field mapping, sampling, and historical data validation will be integrated with geochemical and geophysical datasets to refine exploration targets. Follow-up sampling and future drill testing are planned to assess the continuity, scale, and grade of mineralisation at the 401 Prospect.

Key Features: 

Key Infrastructure:

A litho-structural interpretation of the recently acquired airborne geophysical survey data is currently underway. This work will support the selection of priority areas for follow-up exploration and drill targeting, as well as improve understanding of structural controls on mineralisation.

A soil geochemical programme is planned across approximately 5 km of strike length covering historical workings, as well as newly identified magnetic and radiometric targets. The programme will include around 1,150 soil samples collected on a 200m × 50m grid.

Additional geological mapping will be undertaken, supported by approximately 70 rock chip samples. Field staffing and required supplies have been secured in preparation for commencement.

Following completion of these activities, an integrated geoscientific interpretation will be completed to refine drill targets. Government permitting, heritage surveys, and access track preparation will then be finalised ahead of drill testing of the highest-priority targets.