Cadillac Mines Kerr-Addison 2026 Infill Drilling Results Reviewed

The Abitibi Greenstone Belt and Why Fault-Hosted Systems Keep Delivering

Few geological addresses on the planet carry the same weight as the Abitibi Greenstone Belt. Stretching across northern Ontario and Quebec, this ancient volcanic terrain has been the source of more than 200 million ounces of gold over more than a century of organised mining. Within that belt, the Cadillac-Larder Lake fault system stands out as one of the most structurally productive corridors ever mapped, hosting a succession of world-class deposits along its length.

What makes fault-hosted systems in this corridor particularly compelling for modern resource modellers is their tendency toward structural continuity at depth. Gold mineralisation in these settings is typically controlled by deep-seated, long-lived fault architecture that channels hydrothermal fluids repeatedly over geological time. The result is not isolated pockets of mineralisation, but extended, geometrically coherent zones that can persist for hundreds of metres below the economic cut-off threshold of any given historical operation.

Cadillac Mines (TSX: CADY) controls approximately 40 kilometres of strike length along this fault system, one of the largest single land positions on the belt. That scale is not merely a marketing talking point. In a geological environment defined by linear, fault-parallel mineralisation, strike length directly correlates with the number of potential discovery targets a company can drill within a single land package.

What Historical Production at Kerr-Addison Actually Tells Modern Geologists

A Past-Producer Is Not a Depleted Asset

The Kerr-Addison property produced more than 10 million ounces of gold from its main break structure, making it one of the most significant historical gold mines in Canadian history. For investors unfamiliar with mining development cycles, a past-producing property might sound like an exhausted opportunity. In practice, the opposite is often true.

Historical mining operations were constrained by the economic parameters and technological limitations of their era. Underground methods that extracted high-grade ore from narrow, easily accessible veins left behind enormous quantities of lower-grade, disseminated, or structurally complex material that was either uneconomic to process at the time or simply not detectable with the exploration tools available. The advent of large-scale open-pit mining, combined with modern geophysical survey techniques and tighter drill spacing, has fundamentally reframed the economics of revisiting these legacy sites.

Critically, the footwall zones at Kerr-Addison received comparatively limited drilling during the property's historical operating period. The main break was the primary focus of underground extraction, meaning an entirely distinct set of structural targets, sitting in the footwall position relative to the principal fault plane, was largely bypassed. It is precisely these structures that Cadillac Mines is now systematically testing.

It is also worth noting the distinction between historical production records and modern resource classification. Under Canada's NI 43-101 framework, a resource must be supported by current geological data, qualified person sign-off, and defined confidence thresholds before it can be classified as indicated or inferred. Historical production figures, however impressive, do not automatically translate into compliant resource categories. Cadillac's ongoing infill program is the mechanism by which geological understanding is converted into NI 43-101-compliant resource tonnes.

Cadillac Mines Kerr-Addison Drilling Results: Breaking Down the 2026 Intercepts

First 29 Holes From an 11,569-Metre Campaign

The Cadillac Mines Kerr-Addison drilling results released in August 2026 cover the first 29 infill diamond drill holes from a program that has advanced 11,569 metres of a planned 17,850-metre campaign. The results confirm both lateral and depth continuity of mineralisation within the open-pit resource shell, while several holes return grades that materially exceed the current indicated resource average.

The breadth of these intercepts is geologically instructive. KAD26-397's 38.2-metre interval at 2.13 g/t Au from 192 metres downhole speaks to width and structural consistency within the known resource domain. Furthermore, KAD26-428T's 3.08 g/t Au result over nearly 23 metres, including a higher-grade sub-interval of 5.26 g/t Au over 6.4 metres, demonstrates that grade distribution within the pit shell is not uniform, and that localised high-grade pods are present within the broader mineralised envelope.

The most analytically striking result is KAD26-465, which returned 7.44 g/t Au over 3.7 metres, inclusive of a 0.8-metre sub-interval grading 62.48 g/t Au. Intervals of this grade are often referred to in the industry as bonanza zones — short, extremely high-grade pulses of mineralisation that typically represent localised fluid focusing events within a larger hydrothermal system. While a 0.8-metre interval is too narrow to move the needle on a bulk tonnage resource by itself, its presence confirms that the hydrothermal system driving mineralisation at Kerr-Addison reached conditions capable of concentrating gold at exceptional grades, which has implications for understanding the broader structural plumbing of the deposit.

When interpreting gold drill results of this nature, it is important to distinguish between bonanza sub-intervals and the broader zone widths that underpin resource modelling.

Comparing Results Against the Current Resource Estimate

The context for evaluating these intercepts is the February 2026 NI 43-101 resource estimate, which defines the following:

• Indicated resource: 78.5 million tonnes at 1.34 g/t Au for 3.38 million ounces
• Inferred resource: 25.9 million tonnes at 2.66 g/t Au for 2.21 million ounces

Several of the 2026 infill holes are returning grades that exceed the 1.34 g/t Au indicated average, with KAD26-428T at 3.08 g/t and KAD26-465 at 7.44 g/t representing roughly 2.3x and 5.5x the indicated average respectively. When infill drilling consistently returns grades above the resource average in specific domains, it signals the possibility of grade upgrading within those domains during the next resource estimation cycle. This would positively affect the overall resource grade and, by extension, the economic parameters of any future mine plan.

Understanding drill results for investors requires contextualising individual intercepts against the broader resource grade baseline, rather than evaluating headline numbers in isolation.

Analyst commentary from Desjardins Securities noted that the results demonstrate continuity within the open-pit shell and intersect mineralisation beyond current resource limits, outcomes that support potential resource conversion, expansion, and grade upside ahead of the planned preliminary economic assessment. (Desjardins Securities, August 2026)

Understanding Footwall Zone Targeting: The Structural Thesis Behind the Drill Program

Hangingwall vs. Footwall: Why the Distinction Matters

In vein-hosted gold systems associated with fault structures, the two sides of a fault plane are referred to as the hangingwall (the block above the fault) and the footwall (the block below). Historical mining at Kerr-Addison was principally focused on extracting high-grade ore from the main break, which represents the fault's primary expression. The footwall structures are secondary, sub-parallel, or splaying features that branch away from the main fault plane on the lower side.

These secondary structures are often mineralised because hydrothermal fluids moving along the main fault can propagate into adjacent fracture networks under favourable pressure conditions. Because they were not the primary target of historical underground operations, the footwall zones at Kerr-Addison carry considerably less historical drill data, making them genuinely underexplored relative to their geological potential.

How Footwall Intercepts Translate Into Resource Growth

The step-by-step pathway from a footwall drill intercept to a resource expansion follows a logical sequence that is worth understanding:

1. Drill holes confirm mineralisation outside the current resource boundary or within a domain previously classified at lower confidence
2. A geologist updates the three-dimensional mineralised wireframe to incorporate the new intercepts
3. Geostatistical block modelling is run within the updated wireframe using grade data from all available holes
4. The updated model is imported into pit optimisation software, which re-runs economic shell parameters using current gold price assumptions, mining costs, and processing recovery estimates
5. Where the updated economic shell encompasses new material, that material is formally incorporated into a revised mineral resource estimate

This is precisely the process that Cadillac Mines is building toward with its current infill campaign. The CEO of Cadillac Mines has publicly stated that the 2026 drill optimisation program at Kerr will continue targeting new areas, better defining known footwall structures within the pit, and pursuing new ounces and mineralisation in the step-out program to the northeast of the known resource blocks. The concept of true width vs apparent width is particularly relevant when assessing footwall intercepts, as the orientation of drill holes relative to the structure significantly affects how reported widths should be interpreted.

Scale of the 2026 Exploration Program and What It Signals

Eleven Rigs, $65 Million, and 145,000 Metres

The scale of Cadillac Mines' 2026 exploration program places it among the more aggressive development-stage drilling campaigns in the Canadian gold sector. Key program parameters include:

• 11 diamond drill rigs currently active across the property portfolio
• Majority of rigs allocated to Kerr-Addison infill and expansion
• Infill campaign targeting completion by mid-September 2026
• Total 2026 drill metres planned: approximately 145,000 metres
• Total 2026 exploration budget: approximately $65 million

A $65 million exploration budget is not a figure commonly associated with early-stage juniors. It reflects a company with access to capital at a scale that compresses the timeline between resource definition and economic study. The 145,000-metre target, if executed across a single season, would rank among the largest single-property drill programs in Ontario's recent history.

Beyond Kerr-Addison: Portfolio Diversification

While Kerr-Addison commands the majority of rig attention, Cadillac Mines also holds the Larder and Galloway properties within its land package. The northeast step-out program targeting mineralisation adjacent to the known Kerr-Addison resource blocks serves a dual purpose: it tests for resource expansion beyond the current pit shell while simultaneously de-risking the geological model by confirming whether strike extensions carry comparable grades and widths to the core deposit.

The PEA Timeline and What It Means for Development Trajectory

Q3 2027: The Next Major Value-Definition Milestone

A preliminary economic assessment is the document that transforms a mineral resource from a geological statement into a provisional economic proposition. Understanding the broader mining study stages — from PEA through to prefeasibility and definitive feasibility — helps investors appreciate where Kerr-Addison sits within the overall development cycle. The PEA typically addresses:

• Mining method selection (open pit, underground, or a combination)
• Processing route and metallurgical recovery assumptions
• Capital cost estimates for construction and infrastructure
• Operating cost modelling
• Sensitivity analysis across gold price scenarios
• A preliminary net present value and internal rate of return

For Kerr-Addison, the logical mining method is large-scale open pit, given the geometry of the current resource. With 78.5 million indicated tonnes defined, the deposit sits firmly within the scale range that justifies bulk mining assumptions. The quality of data feeding into the PEA directly determines the robustness of its outputs. A PEA built on tightly spaced, high-quality infill data produces tighter confidence intervals on capital and operating costs, which in turn produces a more credible economic case for advancing to prefeasibility.

The decision to complete the infill program before finalising the PEA is therefore strategically rational. Incorporating the most current resource model ensures the economic assessment reflects the best available geological understanding, rather than being built on a resource that will require immediate revision.

Shareholder Structure and the Credibility Signal It Sends to Institutional Investors

Why the Ownership Registry Is Analytically Relevant

In development-stage mining, the identity of a company's largest shareholders is not merely a biographical footnote. It is a signal about the quality of due diligence that has been applied to the asset and the likelihood that future financing needs will be met without excessive dilution.

Pierre Lassonde's involvement as both the company's largest individual shareholder and its chairman is a particularly distinctive element of Cadillac's investment case. Lassonde co-founded Franco-Nevada, effectively inventing the gold royalty and streaming model that now dominates the upper tier of the gold capital markets. His personal commitment of approximately 14% of Cadillac's equity is not a passive position.

It reflects deep conviction in the asset's long-term potential and brings with it a network of relationships across the royalty, streaming, and major mining company universe that could meaningfully shape future financing structures. For institutional investors evaluating execution risk in a pre-production asset, the presence of these shareholders effectively functions as a form of due diligence validation. Pan American Silver's 6% stake is particularly notable, as its operational expertise in open-pit gold and silver mining provides a credible strategic perspective on the project's developability.

Kerr-Addison Within Ontario's Gold Development Landscape

Infrastructure Advantages of the Kirkland Lake Corridor

Kerr-Addison sits approximately 40 kilometres east of Kirkland Lake, Ontario, within one of Canada's most historically productive gold-mining corridors. The Kirkland Lake region has supported continuous gold mining activity for over a century, which means the surrounding area benefits from well-developed infrastructure that most greenfield projects must build from scratch.

Key infrastructure advantages relevant to Kerr-Addison include:

• Established road networks capable of supporting heavy mining equipment
• Access to grid power through Ontario's existing electrical infrastructure
• A skilled local workforce with deep experience in hard-rock mining operations
• Proximity to existing processing facilities and equipment supply chains
• A mature regulatory environment with experienced provincial permitting authorities

These factors materially reduce the pre-production capital requirements relative to a comparable deposit located in a remote or undeveloped jurisdiction. For open-pit projects in particular, where capital intensity is largely driven by earthmoving, processing plant construction, and tailings management, proximity to infrastructure is a genuine economic differentiator.

Open-Pit Scale and Grade-Tonnage Context

The current resource configuration at Kerr-Addison warrants comparison against typical thresholds for open-pit gold development viability. At 78.5 million indicated tonnes grading 1.34 g/t Au, the deposit sits at a grade that is broadly consistent with other large-scale, long-life open-pit gold projects currently in operation or development across Canada and internationally.

The inferred component, grading a notably higher 2.66 g/t Au, suggests that portions of the deposit carrying above-average grades are still at lower resource confidence. Consequently, the infill program has the potential not only to add indicated tonnes but to upgrade higher-grade material from inferred to indicated status. If footwall zone drilling adds meaningful ounces at grades approaching or exceeding the current inferred average, the overall resource grade profile could improve meaningfully, with direct positive implications for pit economics and NPV sensitivity.

Strip ratio is a variable that will become critical once the PEA is completed. The concept of cut-off grade economics is directly linked to strip ratio calculations, as both parameters define the boundary between material that is economic to mine and waste that must be removed. The geometry of the footwall mineralisation being tested currently will influence how pit optimisation software constructs the economic shell and, by extension, what strip ratios the eventual mine plan must accommodate.

Frequently Asked Questions: Cadillac Mines Kerr-Addison Drilling Results

What is the Kerr-Addison property and where is it located?

Kerr-Addison is a past-producing gold property located approximately 40 kilometres east of Kirkland Lake in northern Ontario. It sits along the Cadillac-Larder Lake fault within the Abitibi Greenstone Belt, a geological structure responsible for more than 200 million ounces of gold production over the past century. Cadillac Mines holds roughly 40 kilometres of strike length across this belt.

What are the best drill results from the 2026 infill program so far?

Standout intercepts from the first 29 holes include 38.2 metres at 2.13 g/t Au (KAD26-397), 22.7 metres at 3.08 g/t Au including 6.4 metres at 5.26 g/t Au (KAD26-428T), and a high-grade sub-interval of 3.7 metres at 7.44 g/t Au including 0.8 metres at 62.48 g/t Au (KAD26-465). The full press release provides additional technical detail on all reported intercepts.

How large is the current Kerr-Addison mineral resource?

As of the February 2026 resource estimate, Kerr-Addison hosts 78.5 million indicated tonnes at 1.34 g/t Au for 3.38 million ounces, plus 25.9 million inferred tonnes at 2.66 g/t Au for 2.21 million ounces. Further context on the Kerr-Addison project history and geological setting is available for investors seeking additional background.

What is the purpose of the infill drilling program?

The 2026 infill program targets the conversion of inferred resources to the indicated category, confirms geological continuity within the open-pit shell, and tests under-drilled footwall structures for resource expansion potential. The data will directly inform the planned preliminary economic assessment.

When is the preliminary economic assessment expected?

Cadillac Mines is targeting completion of the PEA in the third quarter of 2027.

How many drill rigs is Cadillac Mines currently operating?

As of the August 2026 announcement, 11 diamond drill rigs are active across Cadillac Mines' property portfolio, with the majority focused on Kerr-Addison infill and expansion drilling.

Who are the major shareholders of Cadillac Mines?

Pierre Lassonde, who serves as chairman, holds approximately 14% of the company's equity. Pan American Silver holds approximately 6% and Franco-Nevada holds approximately 2%.

Key Takeaways for Investors Tracking the Kerr-Addison Development Story

The Cadillac Mines Kerr-Addison drilling results released in August 2026 represent an important data point in a much longer resource definition journey. Several observations stand out:

• Multiple holes are returning grades above the 1.34 g/t Au indicated resource average, pointing toward potential grade improvement in the next resource update
• The footwall zone thesis represents a genuinely distinct exploration angle from the historical main break, with real potential to add ounces outside the current pit shell
• The scale of the 2026 program — $65 million, 145,000 metres, and 11 rigs — reflects institutional-grade conviction in the asset's economic potential
• The PEA targeted for Q3 2027 will be the most significant value-definition event in the company's near-term development timeline, and the quality of infill data being generated now will directly shape its conclusions
• The shareholder base anchored by Pierre Lassonde, Franco-Nevada, and Pan American Silver provides a credibility layer that extends well beyond the Cadillac Mines Kerr-Addison drilling results themselves and may influence how future financing structures are designed

Disclaimer: This article is intended for informational purposes only and does not constitute financial advice. Forecasts, resource estimates, and development timelines are subject to material risks and uncertainties. Investors should conduct their own due diligence and consult a qualified financial adviser before making investment decisions. All resource figures referenced are sourced from Cadillac Mines' February 2026 NI 43-101 compliant mineral resource estimate.

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