Cabral Gold’s First Pour Beats Schedule and Matches Lab Leach Rates

Cabral Gold poured its first gold on 10 September 2026, producing roughly 1,130 oz of doré ahead of schedule, and the number that matters most sits underneath that headline: the ore on its first leach pad dissolved at a rate matching laboratory conditions, an outcome that commercial-scale heap leach operations almost never deliver.

That parity is the real signal, not the timing beat. A company that spent most of its life as an exploration story has crossed into production, and its opening commissioning cycle just retired one of the technical risks that most often punishes junior producers during ramp-up.

Here is what the commissioning data actually shows about where Cabral stands before commercial production begins, and, just as important, what the company still has to prove before the early results harden into a durable production story.

An explorer becomes a producer: what the first pour actually delivered

The core commissioning facts are straightforward and worth pinning down before anything else:

• First gold pour: 10 September 2026
• Initial yield: approximately 1,130 oz of gold in doré form
• Doré purity: approximately 93-94% gold, remainder predominantly silver

The pour came out of wet-circuit commissioning at the 100% owned Cuiú Cuiú Phase 1 heap leach mine in Pará state, northern Brazil, held through Cabral’s Brazilian subsidiary Magellan Minerais Prospecção Geológica Ltda and operated through the Moreira Gomes starter pit. Doré is the semi-pure alloy poured on site before a refinery separates out the finished metal.

The bars have already been dispatched to a refinery, with assay results pending at the time of the announcement. That dispatch matters more than it looks: it confirms the production chain runs end to end, from stacked ore through leaching, recovery, and pour, to gold on its way to sale.

According to Cabral Gold, the initial commissioning pour of approximately 1,130 oz exceeded pre-pour projections.

That last detail carries weight for how you read the block model. When the first commissioning cycle produces more gold than management’s own models predicted, it is an early positive read on both the reliability of the resource estimate and the efficiency of the processing circuit.

For anyone tracking junior producers, the pour volume and purity give you a concrete baseline. Every subsequent stacking cycle and recovery figure now has a real number to be measured against, rather than a set of study assumptions.

Six weeks ahead of schedule, and what drove the accelerated timeline

The original 2025 Pre-Feasibility Study (PFS) targeted first gold in early Q4 2026. Cabral delivered in September, roughly six weeks early. For a company with no prior mine-building history, that is the schedule beat that gives the whole story its credibility.

The build ran on a tight, sequenced timeline:

1. Gold loan facility closed and fully drawn: 26 November 2025
2. Dry circuit commissioning completed: July 2026
3. Wet circuit commissioning nearing completion: September 2026
4. First gold pour: 10 September 2026

At the announcement date the wet circuit was expected to finalise within about a week. Splitting commissioning into dry then wet stages is deliberate: the dry circuit proves crushing and material handling before reagents and solution enter the system, so problems surface in the cheaper phase first.

Compress that whole span and the picture sharpens. Inside roughly twelve months, Cabral closed financing, made a construction decision, assembled a workforce, finished building, and reached commissioning.

That is a level of execution discipline investors in exploration-stage developers rarely get to observe this early. Schedule performance is one of the most watched indicators of junior developer credibility, and delivering ahead of plan on construction is direct evidence the PFS cost and timeline estimates were reliable, which feeds straight into confidence in the commercial production target.

How the gold loan funded the build

The build was financed by a US$45.1 million senior secured gold loan from the Precious Metals Yield Fund (PMYF), drawn in full by the Brazilian subsidiary. The facility fully covers the estimated US$37.7 million Phase 1 capex set out in the updated PFS.

Gold offtake and project finance structures have evolved considerably in the junior mining sector, with commodity traders and specialised credit funds increasingly filling the role that senior bank lenders once occupied, offering flexible drawdown and repayment terms calibrated to expected production ramp curves rather than fixed amortisation schedules.

The terms run 39 months at 10% per annum, with interest capitalised to principal until December 2026. Principal repayments then begin at 39 kg of gold per quarter from 31 March 2027, timed to line up debt service with expected cash flow from operations rather than front-loading the burden onto a plant that is still ramping.

Why lab-matching leach kinetics at commercial scale is the real technical story

Commissioning leach rates matching laboratory results sounds like a minor footnote. It is not, and the reason sits in the gap between how ore behaves in a test column and how it behaves on a full-scale pad.

Laboratory columns almost always run faster than field heaps. In a lab column, ore is packed uniformly, solution percolates cleanly, and the solution-to-ore ratio is high. Kappes, Cassidy & Associates scale-up data show batch lab columns can recover 100% of the recoverable gold in 2-3 months, while a comparable field heap may reach only around 70% after six months, climbing to roughly 82% after 12 months.

Kappes, Cassidy & Associates scale-up data on gold and silver heap leaching documents how field heaps typically require three to six times longer than laboratory columns to reach equivalent recovery levels, with heap structure and preferential flow paths cited as the principal causes of that gap.

Put differently, field heaps typically need three to six times longer than lab columns to reach the same ultimate recovery. The reasons are structural: ore segregates and stratifies during large-scale stacking, dripper spacing is wider than any lab column, and real heaps develop channelling and preferential flow paths that lab conditions minimise.

Cabral’s commissioning result cuts against that pattern. Oxide material on the first pad is dissolving at a rate comparable to laboratory test conditions, faster than typical scale-up performance would predict.

Parity like this points to favourable ore characteristics: good amenability to heap leaching, decent permeability, and low fines, combined with crushing and stacking practices that are already reasonably optimised. It also suggests the metallurgical test work underpinning the PFS was sound.

Industry scale-up data from Kappes, Cassidy & Associates indicate field heaps typically take three to six times longer than lab columns to reach equivalent recovery, which makes lab-matching kinetics during commissioning a notable metallurgical result.

Here is the discipline the result requires from you. Metallurgical underperformance during ramp-up is one of the most common ways junior heap leach projects erode investor confidence in early production quarters, so matching lab kinetics genuinely reduces that risk category, which carries disproportionate downside.

But it covers one leach cycle on one pad, and full reconciliation of recovered gold against the block model was not yet complete when leaching remained ongoing. The real test is whether that performance holds as stacking scales toward 3,000 tpd and multiple pads run at once.

For investors wanting to understand why ore amenability and fines control matter so much at the pad scale, our dedicated guide to low-grade ore heap leaching covers the agglomeration, permeability, and solution management variables that determine whether lab-scale recovery rates translate to commercial field performance.

The path to 3,000 tpd and what commercial production in Q4 2026 requires

Commercial production is targeted for Q4 2026, and with first gold already flowing, a funded balance sheet, and lab-matching kinetics, that target looks well underpinned. Then the throughput figure arrives.

Stacking at the time of the announcement was running at approximately 1,500 tpd against a design rate of 3,000 tpd. Cabral must double throughput to reach nameplate capacity. The operation is currently overseen by a process management team of roughly 40 employees under a single process manager.

Sector precedent sets realistic expectations here. One analyst at TCI, assessing a junior with California heap leach projects, called a six-month plan to nameplate “too optimistic” and put the typical figure at 12-18 months to reach design capacity.

Sector technical literature and analyst commentary indicate heap leach projects typically take 12-18 months to reach nameplate capacity, meaning early first gold does not guarantee a rapid throughput ramp.

Three variables are worth watching from here:

• Weekly stacking rate progress toward the 3,000 tpd design rate
• Recovery data from subsequent leach cycles beyond the first pad
• Any debottlenecking or pad expansion announced before the commercial production declaration

The market has taken an optimistic view already. As of 12 September 2026, shares traded at C$1.55, near the 52-week high of C$1.59, for a market capitalisation of roughly C$538 million, against a consensus analyst price target of C$1.70 (MarketBeat, 10 September 2026).

There is a cost layer to fold into any model. Brazil’s CFEM royalty on gold sits at 1.5% of gross revenue, and in Pará that can be joined by state-level fees and landowner royalties, so effective government take can run higher than the headline rate alone. The funded operation and ahead-of-schedule pour put Cabral in a strong position relative to peers, but the 3,000 tpd rate should not be treated as a given for full-year modelling until weekly stacking and multi-cycle recovery data confirm it.

The CFEM royalty is one of several cost and regulatory considerations shaping gold investment in Brazil, where state-level fees, environmental licensing timelines, and infrastructure constraints in Pará state can weigh on project economics in ways that headline royalty rates do not fully capture.

What Cabral has proven, and what Q4 will need to show

The commissioning phase has delivered above-expectation results across several metrics at once, and it is worth separating what that confirms from what still sits open.

What commissioning confirmed:

• First gold roughly six weeks ahead of the PFS schedule
• Initial doré output of approximately 1,130 oz, exceeding pre-pour projections
• Leach kinetics on the first pad matching laboratory conditions

What Q4 commercial production will need to demonstrate:

• Sustained throughput at or near the 3,000 tpd design rate
• Multi-cycle recovery reconciliation against the block model grade
• A cost base and cash flow profile ready for debt service (39 kg of gold per quarter from 31 March 2027)

Together, those confirmed results prove the process design and execution quality through initial commissioning. They do not yet prove the operation at design rate, and that distinction is where the next eight to twelve weeks earn their significance.

A junior entering production near its 52-week high, with a gold loan repayment schedule beginning in six months, means the market has already priced in considerable execution optimism. The Q4 2026 commercial production declaration will be the first hard test of whether that confidence is warranted, and it is the milestone against which the commissioning story either converts into a durable production narrative or gets recalibrated.

For readers wanting to understand the scale contrast between junior heap leach operations and Brazil’s larger open-pit development projects, our full explainer on Brazil’s open-pit gold sector covers the financing structures, permitting timelines, and production economics that characterise institutional-scale gold investment in the country.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results, and forward-looking statements regarding production targets and ramp-up timelines are speculative and subject to market conditions and various risk factors.