Cobra Resources Discovers High-Grade Copper-Gold Porphryry in Australia

• High-grade copper discovery: returns standout intercepts including 74m at 1.02% Cu and 0.25g/t Au, confirming continuity of shallow high-grade mineralisation and validating historical drilling.
• Large-scale system potential: Associated molybdenum mineralisation and intrusive geology suggest a larger porphyry copper system
• Shallow mineralisation improves potential economics: Copper zones begin tens of metres below surface, supporting the possibility of lower strip ratios and open-pit development scenarios if continuity is confirmed
• District-scale exploration opportunity: Blue Rose is only one prospect within the wider Manna Hill project, which hosts multiple targets along a 1.6km mineralised trend
• Near-term catalysts: Results from 14 additional drillholes and a permitted follow-up program of 29 RC holes and three diamond holes could materially expand the scale of mineralisation

Copper Exploration in a Supply-Constrained Market

Copper has become a strategically important commodity as electrification accelerates across global energy systems. Electric vehicles, renewable energy infrastructure, and grid expansion all require large volumes of copper, driving sustained long-term demand growth. At the same time, the pipeline of new copper discoveries remains limited. Large-scale discoveries are increasingly rare and often located in jurisdictions with complex permitting environments or challenging geology. Against this backdrop, exploration projects capable of demonstrating scale potential attract significant investor attention. Early-stage discoveries that evolve into district-scale systems can create considerable value long before production is contemplated.

Cobra Resources is positioning itself within this exploration opportunity through its work at the Manna Hill Copper Project in South Australia. Early drilling results at the Blue Rose prospect have returned wide, high-grade copper intersections, supporting the potential for a meaningful mineral system. Initial results from the first 4 holes of an 18-hole drilling campaign include a standout intercept of 74 metres grading 1.02% copper and 0.25g/t gold, reinforcing the geological potential of the project.

Commenting on the results, Cobra Managing Director, Rupert Verco, highlighted the economic implications of the discovery.

“The two intersections in MHRC0018 collectively equate to 92m at 1.0% Cu and 0.22 g/t Au, shallow, thick and high-grade mineralisation that has standout economic potential.”

These early results provide evidence that the Manna Hill project could host both near-surface mineralisation with potential development economics and deeper porphyry-style mineral systems.

Interview with CEO & Managing Director, Rupert Verco

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The Manna Hill Copper Project

Cobra secured the Manna Hill project through an option agreement that provides the company with the right to acquire full ownership. The project sits within the Nackara Arc of South Australia, a region recognised for porphyry copper prospectivity. Infrastructure access is also favourable. The project lies along the national railway and the Barrier Highway between Broken Hill and Adelaide, providing logistical advantages for exploration and potential development.

Importantly, Manna Hill is not a single-target project. Instead, it contains multiple prospects associated with a broader mineralised system. Blue Rose, the focus of the current drilling campaign, sits within a 1.6km strike length of known mineralisation. Historic drilling across the area had already delivered promising results, including intersections such as 47m at 2.2% copper and 0.76g/t gold, suggesting the presence of a significant mineralised system.

The current drilling campaign is designed to confirm the continuity and geometry of this mineralisation while testing deeper extensions.

Drilling Results & Geological Interpretation

Initial results from Cobra’s drilling campaign indicate the presence of wide copper mineralisation zones at Blue Rose. Key intersections include 74m at 1.02% copper and 0.25g/t gold, as well as 86m at 0.60% copper and 0.14g/t gold.

These intersections are notable both for their grade and width. Wide mineralised zones are typically more significant from an economic perspective because they indicate the presence of a substantial mineralised body rather than narrow vein-style deposits. Preliminary interpretations suggest the mineralisation may represent a true width of approximately 70 metres, although further drilling will be required to confirm the geometry.

The drilling also demonstrates continuity between oxide mineralisation near surface and deeper primary sulphide zones. This geological configuration can be advantageous from a development perspective. Oxide copper deposits are often amenable to heap-leach processing, which can require lower capital expenditure compared with sulphide flotation circuits.

If confirmed at scale, this combination could potentially allow for phased development strategies.

Evidence for a Larger Porphyry System

One of the most significant implications of the drilling results is the possibility that Blue Rose forms part of a larger porphyry copper system. Porphyry deposits represent the world’s largest copper resources and typically occur as large mineralised systems associated with intrusive rocks.

At Manna Hill, several geological indicators support this interpretation. Drilling has intersected intrusive rocks including quartz monzonite and diorite dykes, while molybdenum mineralisation has also been identified. Drillhole MHRC0003 returned molybdenum mineralisation including 2m grading 0.38% Mo, which may act as a pathfinder element pointing toward a porphyry core. The molybdenum mineralisation also appears to occur independently of copper-gold sulphide zones. This separation could potentially simplify processing flowsheets if both metals are recovered in future development scenarios.

Together, these geological indicators suggest that the skarn mineralisation currently being drilled could represent the outer expression of a larger copper system.

Exploration Strategy & Upcoming Catalysts

Cobra’s current drilling program is designed to better define the geometry and extent of the Blue Rose mineralisation. A total of 18 drillholes totaling approximately 3,200 metres were completed during the initial campaign.

Assay results from the remaining 14 holes are expected shortly. These results could provide additional evidence of continuity and help refine the geological model. The company has also received approvals for a follow-up drilling program that includes 29 additional reverse circulation holes and three diamond drillholes. Diamond drilling will be particularly important in confirming the true width of the mineralisation and improving geological understanding.

Beyond Blue Rose, Cobra has identified several additional prospects within the Manna Hill project, including Neptune Rose and Black Baccara. These targets are associated with geophysical anomalies interpreted to represent potential porphyry intrusions.

The Manna Hill project benefits from its location within an established mining jurisdiction. South Australia has a long history of resource development and hosts several major copper operations. The region offers a stable regulatory framework and well-developed infrastructure. The project lies close to transport routes including rail and highway access, while nearby Broken Hill provides access to mining services and smelting capacity.

These factors may support future project development should exploration continue to demonstrate scale.

Challenges

Despite the encouraging results, the project remains at an early exploration stage. Only four holes have been reported so far, meaning the scale of the mineral system remains uncertain. Further drilling will be required to demonstrate continuity and define a mineral resource. Geological uncertainty also remains. While evidence suggests the potential presence of a porphyry system, this interpretation must be confirmed through deeper drilling.

In addition, ongoing exploration will require funding, and project economics will ultimately depend on future copper prices and development costs.

Investment Thesis for Cobra Resources

• Early drilling has confirmed wide, high-grade copper mineralisation at Blue Rose.
• Geological indicators suggest potential for a larger porphyry copper system.
• Location within South Australia’s established copper province enhances prospectivity.
• Multiple prospects within the Manna Hill project provide district-scale exploration upside.
• Upcoming drill results and follow-up drilling represent near-term catalysts.
• Project remains early stage with exploration risk until scale is confirmed

Cobra Resources’ initial drilling results at the Blue Rose prospect within the Manna Hill Copper Project provide encouraging evidence of a potentially significant mineral system. Wide copper intersections beginning at shallow depths support the possibility of economically meaningful mineralisation, while geological indicators point toward the potential presence of a larger porphyry copper system.

The project benefits from its location within South Australia’s established copper province and from access to regional infrastructure. Multiple exploration targets within the broader project area also provide additional discovery potential. However, the project remains at an early exploration stage, and further drilling will be required to confirm the scale and continuity of mineralisation. Upcoming assay results from the remaining drillholes and planned follow-up drilling campaigns will therefore be key milestones.

For investors, the central question is whether continued exploration can demonstrate the scale necessary to support a large copper deposit. If drilling continues to deliver strong results, the Manna Hill project could evolve into a globally significant copper exploration story.

Macro Thematic Analysis for Copper

Copper exploration is increasingly shaped by the widening gap between global demand and new supply. Electrification, renewable energy development, and expanding power grids are driving sustained demand growth for the metal. At the same time, the pace of major copper discoveries has slowed significantly over the past decade.

Many new copper projects are located in remote or politically complex jurisdictions, while existing mines often face declining grades and rising operating costs. This dynamic has increased the importance of exploration in stable mining regions such as Australia. South Australia in particular hosts several world-class copper deposits and remains underexplored in certain geological provinces. The Nackara Arc, where the Manna Hill project is located, is increasingly attracting exploration attention.

Within this context, early exploration success at projects such as Blue Rose may represent the first indication of larger mineral systems.

As Cobra Managing Director Rupert Verco noted:

“Blue Rose is the first of a series of prospects to be addressed by Cobra in the fertile Manna Hill porphyry province.”

If further drilling confirms the presence of a larger porphyry system, the Manna Hill project could develop into a district-scale copper discovery. However, exploration success ultimately depends on continued geological validation through drilling.

TL;DR

Cobra Resources has reported strong early drilling results at the Blue Rose prospect within its Manna Hill Copper Project in South Australia, including 74 metres at 1.02% copper and 0.25g/t gold. The wide intercepts confirm shallow high-grade mineralisation and suggest the presence of a potentially larger mineral system associated with porphyry-style intrusions. Geological indicators such as molybdenum mineralisation and intrusive rocks strengthen the exploration model. The project sits within a major Australian copper province and hosts multiple additional targets. With results pending from further drillholes and a larger follow-up program already approved, upcoming drilling will be critical in determining whether the discovery can evolve into a large-scale copper system.

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