The Geology No One Can Override: A Perspective on Mining Methods Under Nuclear Revival

• Uranium trades at ~$86/lb, a threefold recovery from the 2021 trough, yet still below the incentive price required to command a continuous large-scale mining expansion.
• The mining method determines cost structure, capital intensity, and responsiveness to demand, crucial for assessing whether the supply deficit is closing or widening.
• The mining method is determined primarily by geology, not preference: ore grade, thickness and mining depth, decide which extraction method is viable. This geological lock-in is the primary constraint on supply elasticity with implications in investment frameworks.
• Despite ample resources, the producers struggle to meet the surging uranium consumption due to mining constraints, with Australia being a potential game changer. 

The Big Picture

• Uranium mining has undergone a quiet structural transformation over the past three decades. In 1990, underground mines accounted for 55% of global supply. By 2024, in-situ leach (ISL) operations had taken that position at just over 50%, driven entirely by the systematic development of Kazakhstan’s ISL mining. Conventional mining, underground and open-pit, account for roughly 44%, with by-product recovery contributing approximately 4%. Three countries now supply roughly three-quarters of the world’s uranium: Kazakhstan (39%), Canada (24%), and Namibia (12%), each defined by entirely different geology and, consequently, entirely different mining methods.

Comparative Analysis on Uranium Mining Methods

• The choice of mining method is a geological outcome. Ore grade (the concentration of uranium within rock), depth, rock permeability, and deposit geometry collectively determine which method is viable with costs implications as well.

In-situ Leach / Recovery (ISL / ISR)

• ISL essentially pumps a leaching solution like sulfuric acid or alkaline carbonate through injection wells into a permeable ore body, dissolving uranium in situ. The uranium bearing solution is recovered via extraction wells and processed at surface into the yellowcake. No rock is moved, no tailings produced. 
• The unique geology requirement, a hydraulically confined, permeable sandstone host below the water table, restricts its use cases.
• ISL is the most economical method in uranium, a typical wellfield and plant can be built for a few hundreds of million dollars, such as the $400 million capex for Canada’s Wheeler River Project. With no physical mining, chemical materials such as acids primarily account for its operational cost. Kazatomprom’s (the largest ISL producer) 2024 annual report also reports a C1 (direct, site-level cash operating costs) of $16.59/lb, with 23% accounted by materials & supply and 30% from Mineral Extraction Tax, and all in sustaining capital cost (total production and sustaining costs) of $27.65/lb, the lowest among major public producers globally. 

Underground Mining

• Underground mining uses shafts and ramps to access deep, hard-rock ore bodies that ISL and open-pit cannot reach. The impermeable rocks make ISL impossible; depth rules out open-pit, leaving underground mining as the only viable method.
• Underground mining is capital intensive with capex often exceeding $1bn for underground projects. Despite this, extraordinary grades make operation costs competitive: Cameco (the largest underground producer)’s own-production cash cost was Canadian Dollars (CAD) $21.60/lb, with total production cost CAD $31.35/lb in 2024, with life-of-mine averages of $16.70/lb (McArthur River) and $20.58/lb (Cigar Lake). McArthur River grades at 6.55%; Cigar Lake at 15.87%, the highest-grade operating uranium mine in the world, over 300x richer than Inkai, Kazakhstan.

Open-pit Mining

• Open-pit mining uses large terraced excavations to blast and haul ore to surface processing. The method is most suited for large, shallow, geologically uniform deposits. This is used when ISL is not possible (e.g impermeable rocks) and when the deposit is too shallow to justify underground mining.
• Namibia’s Husab and Rössing mines both exploit alaskite-hosted deposits unique to the Damara Orogenic Belt. The deposits are massive and their geometry suits high volume, truck and shovel operations.
• Open-Pit Mining has the highest upfront capital of the three dominant methods, Husab’s initial development cost was over $1.3 billion. The Husab (world’s largest open-pit uranium mine) feasibility study indicated production costs of ~$28.5/lb U₃O₈ including royalties and transport. Primary cost drivers are fuel for the haul truck fleet, sulfuric acid for leaching, and water at $4/m³ from the regional desalination plant, an unavoidable cost in hyper arid Namibia, requiring millions of cubic metres per year.

By product Recovery

• Olympic Dam is a copper,gold,silver & uranium hematite breccia operation where uranium is a secondary product at 0.059% grade. Recovery rate is 68%, the lowest of any significant producer, from a plant optimised for copper. Uranium could also be extracted by products, underscored by Australia. The effective marginal cost is below all dedicated methods given shared infrastructure, but output is entirely subordinate to other targeted minerals. 

• Key Insight: ISL is economically superior on both operating cost and capital intensity, but only where geology permits. Kazakhstan’s permeable sandstone roll-fronts are uniquely amenable. Canada’s high-grade but impermeable Precambrian basement demands underground extraction; Namibia’s shallow, low-grade alaskite requires open-pit scale. The geology chooses the mining methods itself rather than the producers. This geological determinism is the foundational constraint on uranium supply elasticity and differentiates the investability of each producer.

Responding to The Uranium Demand Surge

• Uranium prices have recovered from $29/lb in 2021 to approximately $86.5/lb today, driven by real demand acceleration. The WNA (World Nuclear Association) projects global consumption reaching 150,000 tU by 2040 sets the scale of the challenge against current production capacity.
• Canada (underground dominant producer)’s two largest uranium mines McArthur River and Cigar Lake collectively hold a combined licensed capacity of ~21,500 tU/year. No material expansion is available before the CLExt programme, with first ore not expected until 2030. Namibia (open-pit dominant producer)’s uranium mines Husab has a nameplate capacity of ~7,000 tU/year; Rössing ~4,000 tU/year. Combined ~11,000 tU, well short of a demand curve rising toward 81,500 tU (lower bound) by 2030 in the previous report and the WNA’s target in 2040.
• The uranium demand and supply gap is widening with accelerated nuclear demand driven by AI and the green economy, while the slow-responding inelastic supply is restricted by the high-capex mining methods (underground and open-pit mining). Sustained price incentives and capital deployment are required in the near-term across all methods to push up the production.
• Contrasting to the decades-long lead time for underground and open-pit mining, the wellfield expansion has a lead time of 1-3 years of investment decision. The unparalleled expansion speed with low financial costs favour ISL, hence Kazakhstan in face of surging demand. The superior supply elasticity will further enhance Kazakhstan’s position as a world leading uranium producer and ISL as the mining method worth investing in.

Australia: The Sleeping Giant

• Australia holds the world’s largest endowment, with 28% of the identified uranium resource < $130/kg (as of 2024), its 7.6% global production share that dramatically understates its geological potential. 
• Australian uranium production is, in practice, largely restricted by mining methods: By-products. Olympic Dam holding huge uranium reserves (up to 19,000 tU per year in feasibility study) is copper-driven while uranium is recovered as a by-product from a plant optimised for copper sulphide.
• Therefore, a structural change in the supply dynamics is imminent once capital reallocates. However, with copper mining generating significant revenue and existing infrastructure being set, any material decision would require substantial financial incentives.

Base Case and Break Point

• The base case relies on three conditions: Kazakhstan’s ISL operations remain the lowest cost, fastest responding source of supply mildly restricted by acid availability, wellfield cycles, and transport routing; Canada and Namibia operate near capacity ceilings and struggle to deliver output with moderate expansion underscored by Denison Mines’s Wheeler River Project (Canada first ever ISL mine), Deep Yellow’s Tumas Project; Australia’s endowment remains politically and commercially sidelined.
• The supply structure therefore cannot match the pace of reactor-driven demand acceleration, pushing the long-term clearing price to incentivise nuclear extraction under policy-driven demand.
• Break Points (downside): Australian firms’ reversal on uranium mining; new conventional projects or project expansion reaching production faster than historical timelines.
• Break Points (upside): Intensifying acid shortages such as Kazatomptom’s 2024 sulfuric acid shortages; regulatory or technical delays pushing Namibian, Canadian expansion later; utilities continue to under-contract as unexpected uncontracted demand further pushes price.

The Cordoba View

• Maintain structural overweight to uranium, favouring ISL producers (notably Kazakhstan: Kazatomprom) with cost advantages and expansion optionality.
• The supply deficit continues to widen. Despite ample uranium resources on paper, a partially inelastic supply constrained by methods exerts upward pressure on uranium prices in the medium-term.
• Kazakhstan anchors global supply in the base case but faces acid, tax, and transport constraints; Canada and Namibia are expanding as the major mines near capacity.
• Australia remains the largest latent source but structurally sidelined, any capital reallocation would be a structural market event, but the probability remains low.