Altitude Minerals Advances Byrock Porphyry Targets with New Geophysical Surveys

• Three of seven Pipe Targets confirmed for further drill testing
• 775 infill gravity stations and 92-line km passive seismic acquired
• T55 Target drill tested with rotary mud and diamond core drilling
• Integration of geophysics and petrology to refine drill plans
• Byrock Project interpreted as northwest extension of Macquarie Arc

Validation of Pipe Targets Spurs Next Phase of Drilling

Altitude Minerals Ltd (ASX:ATT) has taken a significant step forward in its quest for copper-gold porphyry deposits at the Byrock Project in New South Wales. Following positive air-core drilling results that flagged three of seven Pipe Targets for follow-up, the company completed 775 infill gravity stations and 92-line kilometres of passive seismic surveys over these targets and the nearby T55 Target. This comprehensive geophysical effort aims to sharpen the understanding of subsurface geology and optimise upcoming reverse circulation (RC) drill collar placements.

The Pipe Targets are interpreted as potential clusters of porphyry pipes analogous to those found in the Macquarie Arc, home to prolific mines like Cadia and North Parkes. The new gravity data, collected on a 200-metre grid, combined with passive seismic and forthcoming 2025 magnetics data, will help Altitude better predict the depth to the core of these systems and prioritise targets within its portfolio.

T55 Target Drilling Supported by Government Grant

Meanwhile, the T55 Target received its first drill test late last year with 419 metres of rotary mud and diamond core drilling. This target, covering a magnetic anomaly roughly 1.6 kilometres square, was validated as a potential porphyry system after ruling out dense ultramafic rock as the source of the geophysical signature. The drilling was partially funded by a NSW Government grant covering 40% of costs, underscoring the strategic importance of this exploration area. Passive seismic data will now be integrated with gravity and alteration studies to assess the need for further drilling.

Altitude’s Managing Director Duncan Chessell highlighted the company’s methodical approach over the past 15 months, combining tectonic models, geochemistry, mineralogy, and multiple geophysical techniques to home in on the most promising large-scale copper-gold porphyry targets. He emphasised the potential for these targets to unlock new exploration spaces beneath shallow cover, a hallmark of modern porphyry exploration.

Byrock Project Positioned Within Macquarie Arc Extension

The Byrock Project sits about 80 kilometres northeast of Bourke, within the Lachlan Fold Belt. Altitude interprets the project area as a northwest segment of the Macquarie Arc, which hosts some of Australia’s most profitable copper-gold mines. The analogy is reinforced by the presence of “pipe-like” geophysical features at Byrock that resemble the pencil-porphyry deposits at North Parkes, which have small footprints but significant resources open at depth.

Multi-year exploration commitments by AngloGold Ashanti with Kincora Copper and Inflection Resources in neighbouring ground further highlight the region’s prospectivity. Altitude’s recent confirmation of a copper-gold porphyry system at T55, supported by government co-funding, adds to the growing momentum around Byrock’s potential. This progress aligns with earlier drilling campaigns and recent acquisitions that have bolstered Altitude’s NSW portfolio and exploration pipeline.

Altitude’s integration of geophysical datasets with detailed alteration and petrology studies is expected to culminate in final target rankings and drill program designs for 2026. This approach reflects a broader trend in porphyry exploration where multiple datasets converge to reduce drilling risk and optimise capital allocation.

For investors tracking Altitude Minerals, the coming months will be critical as the company releases integrated geophysical interpretations and finalises RC drill collars. The outcomes will provide clearer insight into the scale and grade potential of these targets, setting the stage for what could be a defining exploration campaign.

This update follows Altitude’s recent confirmation of the copper-gold porphyry at the T55 Target, a milestone that reinforced the company’s interpretation of the Macquarie Arc extension and was achieved with the support of a NSW Government grant confirmation of copper-gold porphyry. Such developments underscore the strategic value of Byrock within Altitude’s broader growth ambitions.

Bottom Line?

Altitude Minerals is poised to refine its drill targets at Byrock with integrated geophysics and petrology, but the true test lies in the upcoming RC drilling results.

Questions in the middle?

• Will the follow-up RC drilling confirm the presence of economically viable copper-gold porphyry deposits?
• How will integration of passive seismic and magnetics data alter target prioritisation within the Byrock portfolio?
• What impact will ongoing government support have on Altitude’s exploration funding and timelines?