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Priority Gold-Copper Project
in the World-Class Kainantu Mineral District

Osena Project

Overview

Multiple Au-Cu occurrences define mineralized corridor

  • Osena is located in the mineral-rich Kainantu District of Papua New Guinea, adjacent to the Au-Cu-producing K92 Gold Mine.
  • A major NE-trending structural corridor, known for high-grade Au-Cu-Ag veins, is interpreted to extend into Osena’s 738 km² land package.
  • Ontenu, a key prospect within Osena, hosts a large-scale cluster of five intrusive Copper-Gold porphyry, vein, and skarn systems extending over 5 km x 3 km.
  • Recent trenching at Ontenu Central returned 79 m @ 0.75 g/t Au, including 4 m @ 4.52 g/t Au, with a peak of 8.82 g/t Au.
  • Historical rock samples, targeted for follow-up, include 73 g/t Au, 960 g/t Ag, 3.17% Cu & 10.6% Zn (in different locations)
  • More than half of the project remains unexplored, with multiple high-potential targets yet to be tested.

Highlights

Strategic Location

738 km² land package adjacent to the Au-Cu-producing K92 Project in the Kainantu District, featuring a major NE structural corridor hosting high-grade Au-Cu-Ag veins

Rich Geological Corridor

This corridor includes over 15 porphyry, skarn, and epithermal occurrences, with multiple mineralized NE structural zones extending across a 50×30 km district

Focus Prospects and Potential

Priority prospects include Ontenu and Tirokave, with numerous additional targets identified across a distance of more than 45 km

Current Exploration

Large-Scale Mineralized System

Osena hosts more than 15 Au-Cu porphyry, epithermal, breccia, and skarn occurrences, with numerous targets spanning over 45 km. The Ontenu and Tirokave prospects are characterized by extensive mineralization and alteration footprints, coincident geophysical and topographic anomalies, and complex structural settings. The next phase of exploration is currently being prepared.

High-Potential Cu-Au System

Ontenu is a 5 km x 3 km Cu-Au porphyry, vein, and skarn complex with five highly prospective geophysical targets that correlate with surface Cu-Au anomalies. Ontenu Central features a classically zoned porphyry system with widespread alteration and mineralization, suggesting a major porphyry target at depth (~250 m). Trenching has confirmed significant mineralization, including 79 m @ 0.75 g/t Au, 981 ppm Cu, 1.73 g/t Ag, with peak values of 8.82 g/t Au and 3.17% Cu. Historic surface assays returned up to 73 g/t Au, 960 g/t Ag, and 10.6% Zn. Ontenu Northeast is a top-priority target, with visible gold in stream sampling and strong geophysical anomalies indicating lode-gold potential.

Evidence of a Buried Cu-Au Porphyry System

Tirokave is a 6×3 km mineralized footprint interpreted as the high-level part of a buried copper porphyry system. Gold-mineralized stockworks and hornfels have been identified, with float samples returning up to 40 g/t Au. Multiple high-grade trenches further support the presence of a significant mineralized system.

Geology, Alteration and Mineralisation

Geological History

The Osena Project lies within a NE-trending mineralised structural corridor, with multiple Au-Cu occurrences linked to the Elandora Porphyry intrusion. The region has undergone extensive hydrothermal alteration, forming large mineralised systems over a broad 50×30 km area.

At Ontenu, a multi-phase intrusive system has developed strong porphyry-style mineralisation, with widespread potassic, phyllic, and propylitic alteration. Structural complexity and deep-rooted faults have provided pathways for mineralising fluids, forming significant breccia-hosted and vein-hosted Cu-Au mineralisation.

The Ontenu and Tirokave prospects exhibit extensive porphyry, skarn, and breccia-hosted Cu-Au mineralisation.

  • Ontenu Prospect: Large-scale, multi-intrusive Cu-Au porphyry with strong alteration halos. Trench 1 mineralisation extends over 79 m, returning values of 0.75 g/t Au, 981 ppm Cu, including 4 m @ 4.52 g/t Au, 0.13% Cu.
  • Skarn Zones: Carbonate-rich host rocks near intrusions have undergone contact metasomatism, resulting in localised high-grade skarn mineralisation. Historic samples include 73 g/t Au, 960 g/t Ag, 3.17% Cu, and 10.6% Zn.
  • Supergene Enrichment: Shallow oxidation and weathering have led to secondary Cu enrichment, with zones of chalcocite mineralisation observed in drilling.
  • Deep Porphyry Potential: Modelling suggests a preserved porphyry system at depth (~250 m), with bornite and chalcopyrite-rich zones indicating strong Cu-Au mineralisation in the hypogene system.

Maps & Figures

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