Highlights
- Altitude Minerals has elected to proceed with the next stage of the Earn-in and Joint Venture Agreement with Nimrod Resources Limited, reflecting the increased confidence in the prospectivity of the Byrock Cu-Au Porphyry Project
- In accordance with the Earn-in Agreement, Altitude Minerals will issue $200,000 worth of ATT shares to Nimrod as consideration for progressing to Stage One of the Earn-in
- Altitude now has two (2) years to spend a further $1.35m to earn 51%
- Positive Proof-of-Concept Drill Results have validated the geological model and confirmed the prospectivity of the target area to host Cu-Au porphyry style deposits
- Porphyry Pathfinder Elements* Sb, As, Bi, Te, Se, Sn, W and Mo, and pervasive propylitic alteration, consistent with the vertical distribution of elements above a Cu-Au porphyry system, were detected in air-core drill assays
- 0.15 g/t Au was intersected on three of the Pipe Targets, P38, P37 and P01
- 3 of 7 Pipe Targets warrant follow-up, deeper RC drilling
Results to date support continued staged investment under the earn-in and JV structure and systematic exploration which is likely to include follow up deeper RC drilling on the highest priority Pipe Targets.
The size of the prize in the Macquarie Arc is finding the next cluster of world-class porphyries like the pencil porphyry deposits, such as E26 and associated North Parkes deposits.
The presence of economic Cu-Au porphyry mineral systems in the Company interpreted NW extension of the Macquarie Arc if confirmed with deeper drilling, would be very significant for Altitude and NSW.
Drilling Program details
Altitude Minerals completed 2,198m of air-core drilling in November at the Pipe Targets and 419m of rotary mud & diamond core drilling at Target T55 in December. The program aimed to test shallow Pipe Targets, where the potential exists to identify “pencil” Cu-Au porphyry deposits.
Porphyry deposits account for most of the global copper production annually and a substantial proportion of gold resources. Despite the typical large-scale nature of porphyries, a multi-phased drilling program is often required to discover an economic porphyry deposit.
However, porphyry copper deposits have a distinctive “fingerprint” of mineral alteration & pathfinder elements.
Pathfinder Element Footprint & Alteration Minerals of Eastern Australian Porphyry Deposits
Scott Halley 2024 (adapted from Halley et al 2015)
The dashed red outline represents the ATT interpreted position of ATT drilling based on geochemical and alteration results from air core drilling.
Geochemical Observations
Multielement and gold fire assay analysis was completed for select intervals on 3m composites. 1m samples were analysed for zones of higher interest, i.e. intense alteration and abundant quartz vein fragments.
Combinations of elevated pathfinder elements As, Bi, Sb, Se, Sn, Te, Tl and W, consistent with values expected in the alteration halo of a Cu-Au porphyry system, proposed by Dr Scott Halley (above), were observed in Target P02, P01, P38 and T47. Dr Halleys’ model is widely regarded as an extremely valuable tool in exploring and understanding Cu-Au porphyry deposits.
The cross-section of Target P38 demonstrates the increasingly elevated combination of multiple pathfinder elements downhole, suggesting a causative intrusion at depth, untested by the aircore drilling program.
Click here to enlarge
The lack of copper returned in assays is an expected result of air drilling above a porphyry system. This is due to Cu being highly mobile and typically dispersing widely during weathering (<500ppm Cu concentrations) compared to less mobile elements such as bismuth (Bi).
Elevated gold (>50ppbAu) was detected in drillholes from target P02, P37, P01 and P38 where the gold was spatially associated with quartz veins.
Based on these positive results, follow-up deeper RC drilling is warranted on Targets P38, P01 and P02.
Latest Investor Updates
Drilling Supports Interpreted NW Extension of the Macquarie Arc, Byrock Project, NSW
This first-ever drillhole at Target T55 (EL9746), Byrock Project, achieved a key objective — confirming the presence of a porphyry intrusive system beneath cover in a Company interpreted NW extension of the Macquarie Arc, NSW
Altitude Advances Earn-in on Positive Air-Core Results
Positive Proof-of-Concept Drill Results have validated the geological model and
confirmed the prospectivity of the target area to host Cu-Au porphyry style deposits
Altitude Appoints Principal Geologist USA
Altitude Minerals Ltd is pleased to announce the appointment of Mr Gabe Graf as Principal Geologist – USA, effective immediately.
Quarterly Activities Report: December 2025
Catch up on all the latest Activities with this Quarterly Report
Exploration Update: Final Report for 2025
An update on the exploration work and plans for Altitude’s projects for December and into 2026
Heavy Mineral Sands Intersected in First Drilling Program at Eromanga HMS Project, S.A.
First wide-spaced drilling program confirms heavy mineral sands (HMS)
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