Koryx Copper Clears Path to Haib PFS With Final Drill Results

#

Koryx Copper has closed out the prefeasibility study drill programme at its Haib copper project in southern Namibia, releasing assay results from 18 holes that confirmed broad sulphide mineralisation and near-surface high grades in the zone marked for first mining.

That completion, reported on 22 September 2026, is the event that clears the path to two of the year’s most consequential releases for the project: an updated mineral resource estimate and a formal economic study, both now confirmed on track before the end of 2026.

Haib already holds one of the largest copper resources of any TSX Venture Exchange (TSX-V) junior, at roughly 1.3 billion tonnes as of March 2026. Completing the drilling is the point where geological exploration begins converting into a structured economic case.

For anyone tracking copper development stories, the arrival of a completed drill programme, a scheduled resource update, and a prefeasibility study inside the same calendar year is an unusually dense run of catalysts.

Here is what the completed programme delivered, why the zone earmarked for first mining carries outsized weight, and what the two year-end milestones actually set in motion.

What the final drill holes actually showed at Haib

The headline came from Hole HM192: a 102 metre intercept grading 0.38% Cu from 6-108 m depth, including a 6 m sub-interval at 0.66% Cu and 166 ppm Mo near surface. The final phase of drilling totalled 7,074 metres across those 18 infill and expansion holes.

On its own, one strong intercept means little. It is the accumulation across the year that matters.

The 9 September 2026 release, covering 15 holes and 6,825 m, delivered the widest hits of the campaign. Among them: 318 m at 0.49% CuEq from 162-480 m, 220 m at 0.40% CuEq from 32-252 m, and a 12 m at 2.55% CuEq interval starting at surface.

Then there was the August work, and one number that reframes the deposit’s scale.

Here are the standout results across the three main 2026 release windows:

• HM192: 102 m at 0.38% Cu, with a near-surface 6 m sub-interval at 0.66% Cu and 166 ppm Mo
• September wide intercepts: 318 m at 0.49% CuEq, 220 m at 0.40% CuEq, 12 m at 2.55% CuEq from surface
• August campaign: 969 m at 0.27% CuEq, plus HM177 returning 30 m at 1.10% CuEq from only 8 m depth

Read together, the pattern is what counts. Haib is not a narrow high-grade vein system; it is a large-footprint porphyry where mineralisation holds across both depth and lateral extent. That consistency is what underlies the case for open-pit mining at scale, and it points to a resource that may prove wider and shallower in key areas than earlier models captured.

Haib is a large-footprint porphyry copper deposits system where mineralisation holds across both depth and lateral extent, a structural characteristic that distinguishes it from narrow vein systems and underpins the case for bulk open-pit extraction at scale.

Why Target Area 3 is the section that matters most to any mine plan

The grades tell one story. Where they sit tells another, and for a mine plan the second story is arguably more important.

Target Area 3 is designated as the starting point for the planned mine sequence, and Koryx leadership singled out its results as especially representative of the deposit’s character. The near-surface high-grade sub-interval in HM192, 0.66% Cu and 166 ppm Mo, sits within this zone. So does the theme from the August campaign, where HM177 returned 30 m at 1.10% CuEq from just 8 m depth.

The logic behind a near-surface, higher-grade starter zone is a sequence, and each step feeds the next:

1. Higher early head grades lower unit operating costs in the opening years of the mine.
2. Lower unit costs lift net present value (NPV) and internal rate of return (IRR) relative to a blended-grade scenario, while shallow ore reduces strip ratios and early capital intensity.
3. Stronger early NPV is what anchors financing conversations with majors, streamers, and project financiers.

For you as an investor, this is where geology stops being abstract. The starter-zone grade is the direct input to the early-year cash flow projections in the prefeasibility study, and those projections are precisely what potential partners and lenders will scrutinise hardest. The concentration of near-surface high grades in the planned starter zone suggests the open-pit sequencing is grounded in the drill data rather than imposed on it, which lowers one category of execution risk heading into the study.

Where the starter-zone thesis carries risk

The thesis is not without caveats, and three deserve to stay in view.

Grade cliff risk is the first: if the high-grade starter zone holds less volume than early intercepts imply, grades can fall sharply in mid-mine-life and disappoint anyone extrapolating from the opening years.

Geometallurgical risk is the second: near-surface material may differ in hardness, alteration, or impurity levels from deeper ore, so processing assumptions need robust testwork to confirm.

Social-licence risk is the third: front-loading mining in areas closest to communities or sensitive ground can heighten ESG scrutiny unless carefully managed.

Two milestones before year-end and what each one delivers

The completed drilling now feeds two sequential gates, not one simultaneous announcement. Understanding the order is the key to reading what comes next.

The first gate is the updated mineral resource estimate. The current baseline, from March 2026, stands at roughly 1.323 billion tonnes: 744 Mt Indicated at 0.28% Cu (0.32% CuEq) for 2,090,000 tonnes of contained copper, plus 579 Mt Inferred at 0.24% Cu (0.28% CuEq) for 1,385,000 tonnes of contained copper. The 2026 infill drilling should improve on that by reclassifying some Inferred tonnes to Indicated and potentially extending the resource boundary where expansion holes pointed, raising confidence in the block model.

The second gate is the prefeasibility study (PFS), which delivers what a resource estimate cannot: a defined mine plan, capital and operating cost estimates, a metallurgical flowsheet, infrastructure assumptions, and a structured economic case that lets majors, streamers, and financiers engage seriously.

The second gate is the prefeasibility study (PFS), which delivers what a resource estimate cannot: a defined mine plan, capital and operating cost estimates, a metallurgical flowsheet, infrastructure assumptions, and a structured economic case that lets majors, streamers, and financiers engage seriously.

Both remain on schedule, according to the company’s most senior leadership.

The sequence carries weight for you. The updated resource feeds directly into the PFS mine plan, so any slippage in the resource update would cascade into the study timeline. That makes Duan’s on-schedule confirmation on 23 September the single clearest signal to track against between now and December. Delivering both milestones in one calendar year would compress the development timeline in a way that materially changes how the market and potential partners price the project’s risk, because it removes the open question of whether the economic case can be assembled at all.

How Haib fits into the global copper development landscape, and what the risks still are

Step back from the intercepts, and the strategic frame comes into focus. The global copper development pipeline leans heavily on a small number of large, long-life porphyry systems, and projects that reach PFS with conventional processing and defined starter-pit sequencing tend to draw attention from the majors and financiers who need exactly those assets.

The global copper development pipeline leans heavily on a small number of large, long-life porphyry systems, a concentration that reflects how rarely new deposits of sufficient scale and grade reach the study stage in jurisdictions with established regulatory frameworks.

Haib fits that description on paper. Its 744 million tonnes at 0.28-0.32% CuEq in the Indicated category place it among the larger undeveloped copper resources globally. The processing route is conventional: copper and molybdenum concentrate produced through sulphide milling and flotation, with no novel metallurgy required. Namibia is an established mining jurisdiction, which reduces some regulatory unknowns relative to less stable settings.

That is the opportunity. The risks are equally concrete.

The risk factors investors should keep in view

• Financing scale: Large porphyry developments typically demand capex in the hundreds of millions to billions of dollars, well beyond a TSX-V junior’s balance sheet, making farm-ins, streaming deals, or equity issuance likely and dilution a real prospect.
• Permitting and tenure history: Haib’s past under Deep-South Resources, which involved licence cancellation and legal proceedings in Namibia before tenure was resolved, is frequently cited as a cautionary precedent even in a stable jurisdiction.
• Timeline execution: A dual-milestone year-end target with multiple sequential dependencies is ambitious; comparable African projects have taken 5-10 years in several documented cases to move from resource through PFS, DFS, and construction.

You need to hold both sides at once. The technical and study-progress case strengthens with each drill release and milestone confirmation, but the gap between a junior balance sheet and full development cost is the variable that decides whether that progress converts into shareholder value. Deposit scale, conventional processing, and a defined starter zone make Haib a credible candidate for major-company interest at PFS. Financing is the test that scale cannot pass on its own.

What comes next as the clock runs toward December

The completed drill programme is not really the story. The story is that Haib is now close enough to a formal economic case that the next two releases will either validate or reframe the thesis a year of drilling has been building.

Two signposts define the watch list between now and year-end:

• The updated mineral resource estimate: Watch whether the 2026 infill drilling upgraded Inferred material to Indicated and whether the resource boundary expanded in the direction the expansion holes suggested. This is the first real test of drilling quality, measured against the March 2026 baseline of roughly 744 million tonnes at 0.28-0.32% CuEq Indicated.
• The prefeasibility study: Watch for the first capital cost, operating cost, and NPV figures ever attached to Haib at its post-2026 drill scale, the numbers that convert a geological story into a financeable one.

For readers who want to evaluate the significance of the Inferred-to-Indicated upgrade that the 2026 infill programme is expected to deliver, our dedicated guide to mineral resource classification explains the confidence thresholds, drilling density requirements, and geostatistical methods that determine how tonnes move between categories.

Both remain confirmed on schedule by CEO Heye Duan as of 23 September 2026. The content of these releases, not merely their arrival, is the signal that matters. Track the resource update and the PFS as a linked pair rather than two separate announcements, and you will have the clearest read on whether this year’s drilling delivered the resource quality the mine plan actually needs.