Columbus Gold Corporation
BEST50OTCQX
2018
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Gold Mining Complete Industry Overview for Beginners
Industry Overview

Gold Mining Complete
Industry Overview
for Beginners

Gold mining is a concentration business. Gold exists in trace amounts in virtually all rock on earth, in seawater, in your backyard soil. The industry exists because geological processes have, in a few places, concentrated gold to levels where it is economically viable to extract. Finding those places, digging out the rock, chemically separating the gold, refining it, selling it. Thousands of years and counting.

01

Grade

Grade, measured in grams per tonne (g/t). 1g/t equals one gram of gold per tonne of rock. Global average mining grade sits around 1 to 1.5g/t today. Twenty years ago it was closer to 3.

When grade drops from 3 to 1.5, the tonnage of rock that has to be moved, hauled, crushed, ground, and chemically processed to produce the same amount of gold doubles. Grinding electricity is billed per tonne. Tailings are generated per tonne. Water is consumed per tonne.

Company reserve figures are built on a cut-off grade. The cut-off grade is a line drawn through the deposit: anything below that grade does not count as reserves. Where this line sits depends on the gold price assumption plugged into the model. A company using 1500 dollars per ounce will report a very different reserve number from the same company using 2000 dollars per ounce on the same deposit. The difference can easily exceed 50%. The reserve number on the press release is meaningless without the footnotes. Gold price assumption, cut-off grade, those two parameters first, then the reserve number.

02

Finding a Gold Deposit

Grassroots exploration runs about three years on average. A few million dollars. The success rate, and this number is brutal, is roughly one in a thousand. One viable mine out of every thousand exploration programs initiated.

Daily life for an exploration geologist: mapping rock outcrops, bagging soil samples, running geochemical surveys over grid lines in the bush. Long stretches of nothing. Most geochemical anomalies do not lead anywhere. When one looks promising, a drill rig gets mobilized. Drill rigs in remote locations are expensive to move and expensive to operate. The core comes up in cylindrical pieces a few centimeters across, gets logged by the geologist right there at the drill site, then packed and shipped to a laboratory for assay. Turnaround time on assays can be weeks. Most of the time the numbers come back disappointing. Once in a while a hole hits something interesting, a meter of core assaying 8 or 12 g/t. The question immediately becomes: is this a nugget effect, a lucky hit on an isolated pocket, or is this the signature of something with continuity? The only way to find out is to drill more holes around it. Several more million dollars go in. After a few rounds of this, either the thing has enough shape and size to justify the next stage of work, or it gets shelved. Shelving is what happens to almost everything.

The people who do this work live in camps in West African jungle, in shipping containers in the Australian outback, in tents on Canadian tundra in blackfly season. Some junior exploration companies are funded so thinly that their geologists double as camp cooks. The disconnect between the people doing this work and the people trading the stock of the company they work for is enormous. Exploration geologists as a group tend to have very mixed feelings about the industry. Deep attachment to the geology and the fieldwork, deep frustration with how the market values what they do. When a discovery happens, the press release names the CEO. The geologist who picked the drill target and logged the core at 2 AM under a headlamp gets maybe a mention in the technical report appendix. At mining conferences like PDAC in Toronto, you can physically see the divide: the geologists in hiking boots carrying rock samples, the bankers in suits carrying pitch books, orbiting the same room with very different gravitational pulls.

Shelving is what happens to almost everything.

Drill core gets stored in core libraries, some of them holding samples from decades ago. When assay technology advances, old core gets re-assayed. When geological understanding of a deposit evolves, old core gets re-sampled. Core libraries are not on any balance sheet, and their value is invisible until the core is gone. Small companies that go bankrupt leave their core racks exposed to rain and sun. A few years of neglect and the sample integrity is destroyed. If someone later acquires the mineral rights and wants to start over, the drilling has to be repeated from scratch.

Assay accuracy. Everything downstream depends on this. Grade data comes from laboratory analysis of drill core samples, and there are multiple points where error or fraud can enter. Sample contamination during preparation. Non-standard splitting techniques. Laboratory instruments drifting out of calibration. The defense against this is QA/QC: inserting certified reference materials (samples with independently verified gold content), blanks (barren material that should assay near zero), and field duplicates (splitting the same sample in two and submitting both) into the sample stream. When the reference material comes back at the wrong number, or the blank comes back with gold in it, or the duplicates disagree, something in the chain is broken. Large companies enforce this rigorously. Some juniors skip steps, especially when cash is short and the next financing round depends on getting drill results out fast. The 1997 Bre-X fraud in Indonesia worked by salting assay samples with alluvial gold. Michael de Guzman, the project's chief geologist, fell from a helicopter before the fraud unraveled. The entire Canadian mining disclosure framework, NI 43-101, was built in response to that episode.

03

Feasibility

Exploration confirms something worth studying further. The feasibility study stage takes another three to five years and costs tens of millions to well over a hundred million dollars. All sunk cost.

There are two tiers. The Preliminary Feasibility Study (PFS) is lower precision, used internally to decide whether to keep spending. The Definitive Feasibility Study (DFS, sometimes called a Bankable Feasibility Study or BFS) is what the banks want to see before they write a check. Between PFS and DFS there is a mountain of additional drilling, metallurgical test work, geotechnical investigation, and engineering design.

Construction cost overruns of 30% to 50% relative to the DFS estimate are common across the industry. Mines get built in remote locations where logistics costs are easy to underestimate. Permitting delays push the schedule out and costs accumulate. Commodity price swings affect procurement of steel, concrete, fuel. And there is the incentive problem: a feasibility study that does not produce an attractive IRR does not get financed, and management whose compensation is tied to project advancement has every reason to ensure the numbers come out favorably. This is not a conspiracy theory. It is a well-documented structural bias. Academic studies on mining project cost overruns consistently find the same pattern.

Metallurgical testing deserves special attention because this is where fortunes quietly get made or destroyed. The metallurgical test program answers: what processing route will work for this ore, what gold recovery rate can be expected, and does the ore need pretreatment. Two zones in the same deposit can behave completely differently in the lab. Near-surface oxide ore, where the original sulfide minerals have been weathered and the gold is liberated, often responds beautifully to straight cyanide leaching. Recovery rates above 90%, simple flowsheet, low cost. Go deeper into fresh sulfide rock where the gold is locked inside arsenopyrite crystals, and the same cyanide leach might recover 30%.

A mine that was performing at an AISC of 900 dollars per ounce on oxide ore can suddenly be looking at 1400 or 1500 on sulfide ore, and there is no quick fix.

The reason this matters so much in practice is that most gold mines eat their oxide ore first. The oxide cap is usually the shallowest and most accessible material. Early production years look outstanding because the ore is easy and cheap to process. Investors who project those early-year margins across the full mine life are making a serious mistake. The oxide ore is typically a small fraction of total reserves. The bulk of the resource sits in the sulfide zone. When the transition from oxide to sulfide comes, the cost structure can shift dramatically, especially if pretreatment capacity was not built in advance. Some companies deliberately underinvest in metallurgical testing of the deeper sulfide ore during feasibility, because acknowledging the full processing cost upfront would make the project economics look worse. The consequences surface years later. A mine that was performing at an AISC of 900 dollars per ounce on oxide ore can suddenly be looking at 1400 or 1500 on sulfide ore, and there is no quick fix because retrofitting a pressure oxidation circuit takes years and costs several hundred million dollars.

Grade reconciliation. The geological model predicts what grade the ore should be. The processing plant measures what it actually recovers. The comparison is grade reconciliation. When the plant consistently recovers less gold than the model predicted, there are two possible explanations that have very different implications. One: the geological model was wrong, meaning the resource is smaller than estimated. Two: the mining operation is suffering from excessive dilution, meaning waste rock is getting mixed into the ore stream and dragging down the average grade of what arrives at the plant. Underground mines have higher dilution rates than open pits because controlling the boundary between ore and waste in a narrow underground stope is harder than in a wide-open pit. Identifying which explanation is correct requires detailed analysis. Some companies are forthcoming with reconciliation data. Many are not.

04

Permitting

Environmental impact assessment, community consultation, government approvals. Two to five years. Sometimes far longer.

This stage lacks the technical drama of exploration or metallurgy. Its power over project outcomes is inversely proportional to the attention it receives in most industry overviews. A deposit with world-class grade and simple metallurgy can sit undeveloped for a decade because of permitting. Social license to operate, the informal acceptance of a mining project by local communities and broader society, has become as important as the formal government permit. Lawsuits from environmental groups, road blockades by indigenous communities, changes in government policy after elections. All of these can halt a project that has every other box checked.

Community relations over a mine life of twenty to thirty years is genuinely hard. Leadership in the community changes, expectations shift, promises made by previous management teams may not have been honored. Trust erodes quickly and rebuilds slowly. There is a particular kind of exhaustion that sets in among project development teams that have spent years in permitting limbo. Geologists found the deposit, metallurgists confirmed the process, engineers designed the plant, economists ran the numbers, and then the project sits in a regulatory queue while the people who built it move on to other jobs, the gold price changes, and the whole thing needs to be re-evaluated when (if) the permit finally comes.

1 : 1000
Exploration success rate
10–20 yr
Sample to first doré
30–50%
Typical cost overrun
05

Construction, Ramp-Up, and the Cash Flow Valley

Construction runs two to four years. Processing plant, tailings facility, roads, water supply, power supply, camp infrastructure. Cash flows only outward during this phase.

After commissioning, the processing plant enters a ramp-up period, typically six to eighteen months, during which throughput gradually increases toward design capacity. This period is underappreciated. Production is below design, unit costs are elevated, and any equipment failure or process upset that extends the ramp-up puts intense pressure on cash flow. A mine that was supposed to be generating cash within three months of commissioning but takes fourteen months to reach stable throughput can find itself in serious financial difficulty, especially if it is carrying project debt. Investors react strongly to the headline "first gold poured" and often do not pay close attention to how the ramp-up is going quarter by quarter.

Start to finish, from the first soil sample to the first doré bar coming out of the smelter, ten to twenty years. This timeframe explains a lot about why the industry behaves the way it does. Decisions made today are bets on conditions that will prevail in the 2030s and 2040s. The junior exploration company share price pattern called the Lassonde Curve maps directly onto this timeline: spike on discovery, long grind downward through feasibility and permitting (no exciting news, continuous cash burn, repeated equity raises diluting existing shareholders), and a recovery in late construction and early production.

06

Open Pit Mining

Kalgoorlie Super Pit · Western Australia

Strip ratio is the number. Tonnes of waste rock per tonne of ore. A 3:1 strip ratio means three tonnes of waste moved for every tonne of ore. The haul truck fleet is often the single largest operating cost line item. A large open pit gold mine can run over a hundred haul trucks, each carrying over 200 tonnes, each costing three to five million dollars to buy, with tires at tens of thousands of dollars apiece lasting a few thousand hours. Caterpillar 797s, Komatsu 930Es. Fuel consumption across a fleet of that size is staggering. As the pit gets deeper, haul distances stretch, cycle times increase, fuel consumption goes up. Autonomous haulage systems are gaining traction, not primarily for labor savings but because autonomous trucks run 24 hours without shift changes and drive more consistent, optimized routes. This is one of the areas where mining technology is genuinely advancing in a way that affects unit economics.

07

Underground Mining

Far higher cost per tonne than open pit. Ventilation, pumping, ground support, refrigeration in deep mines. In South Africa, gold mines have gone past 4 kilometers deep. At those depths, virgin rock temperature approaches 60°C. Massive refrigeration plants underground. Seismic risk from rock stress at depth. South African deep gold mining output has been contracting for twenty years, not because the gold ran out but because the intersection of cost, safety, and physics has pushed many operations past viability. The transition from open pit to underground, which many deposits eventually require as the pit reaches its economic depth limit, involves one to two years of reduced production and a capital commitment measured in hundreds of millions. It is one of the hardest investment decisions in mining.

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08

Processing

Processing is where gold mining gets technically dense, and it is the main reason two deposits with identical grades can have wildly different economics. The subject deserves disproportionate attention in any serious overview.

Ore comes out of the mine in large chunks and needs to be reduced to a fine powder before the chemistry can work. Jaw crushers and cone crushers handle the primary and secondary reduction. Grinding is where the energy goes. Semi-autogenous grinding mills (SAG mills) and ball mills, rotating drums the size of houses filled with steel balls and ore. The ore is ground to the consistency of fine powder. SAG mills can exceed ten meters in diameter and draw over ten megawatts. Ball mills consume grinding media (forged steel balls) at a rate of thousands of tonnes per year at a large operation. The procurement cost of steel grinding balls is a line item in the operating budget that would surprise most outsiders.

Grinding accounts for over 40% of a gold mine's total energy consumption. The electricity price paid by the mine is therefore one of the most powerful determinants of profitability, and it varies enormously by location. A mine in Quebec benefits from some of the cheapest hydroelectric power on the planet. A mine in the Western Australian goldfields, hundreds of kilometers from the grid, may be running on diesel generators. Same grade, same throughput, same metallurgy, and the AISC difference from electricity alone can be over a hundred dollars per ounce. When people evaluate gold projects, they often focus on grade and reserve size. Electricity cost is unsexy and gets less attention than it deserves.

After grinding, the ore slurry goes to flotation in many cases, especially with sulfide ores. Air bubbles are introduced into the slurry, and minerals with hydrophobic surfaces attach to the bubbles and float to the top while the rest sinks. This produces a concentrate with a much higher gold content than the original ore.

Cyanide leaching. This is the process that produces the vast majority of the world's gold. The ore or concentrate is mixed with a dilute solution of sodium cyanide. Gold reacts with cyanide in the presence of oxygen to form the soluble gold cyanide complex Au(CN)₂⁻. The gold literally dissolves from the solid rock into the liquid. Leach times run 24 to 72 hours depending on the ore. Over 80% of global gold production depends on this reaction. Alternatives have been researched intensively for decades. Thiosulfate leaching, thiourea leaching, chloride-based processes. In the laboratory they all work. At full industrial scale, none of them have displaced cyanide. The economics and the process robustness of cyanide are unmatched. Cyanide is toxic. Modern mines use closed-circuit systems and detoxify tailings with processes like the INCO SO₂/air method before discharge. The technology for safe cyanide management has improved enormously. Public fear of cyanide has not diminished in proportion, and in some jurisdictions that fear translates directly into permitting barriers or outright bans. Several European countries prohibit cyanide use in gold mining.

Activated carbon adsorption. The gold cyanide complex is captured from solution onto granules of activated carbon made from coconut shells. The gold-loaded carbon goes through an elution circuit to strip the gold off the carbon, then to electrowinning to plate out metallic gold. The carbon gets reactivated in a kiln and recycled. Carbon management in the processing plant is one of those operational details that nobody writes about but that the plant manager thinks about every day. Carbon attrition rates, loading efficiency, reactivation temperature profiles. Small inefficiencies here translate into gold losses.

The smelter produces a doré bar. Gold-silver alloy, somewhere between 70% and 90% purity. This is not the final product. Doré bars are shipped to a refinery for purification to 99.99%. LBMA-certified refineries: Valcambi and Metalor in Switzerland, Rand Refinery in South Africa, a handful of others. These refineries are the last checkpoint between the mine and the financial system and they receive surprisingly little public attention given their role.

Choosing among these three is an irreversible decision. The infrastructure is completely different.

Refractory ore. When gold sits physically encapsulated inside sulfide mineral grains, predominantly arsenopyrite and pyrite, cyanide solution cannot contact the gold surface. The sulfide lattice has to be broken open first. This pretreatment step, called oxidation, is the single biggest cost differentiator in gold processing.

Three methods. Each has a very different character.

Pressure oxidation, POX. An autoclave operating at roughly 200°C and elevated pressure. Oxygen is injected. The sulfides oxidize rapidly, releasing the gold. POX handles the widest range of ore types and produces the most consistent results. It is also the most capital-intensive, and autoclave maintenance is a specialized discipline. POX facilities cost hundreds of millions to build.

Biological oxidation, BIOX. Tanks of acidic slurry, warm, teeming with bacteria. Acidithiobacillus ferrooxidans and related species. These organisms eat sulfide minerals for energy. They work slowly, taking several days compared to POX's hours, and they are finicky about temperature and pH. BIOX capital and operating costs are lower than POX. Where BIOX gets interesting is its sensitivity to environment. It works beautifully in equatorial Africa where ambient temperatures are warm and consistent year-round. Fairbanks Gold in Alaska (now operated by Kinross) looked at BIOX and rejected it because Alaskan winters would have required continuous heating of the leach tanks, erasing the cost advantage over POX. A BIOX operation hit by an unusually cold snap can see bacterial activity drop and leach efficiency fall off, which shows up as a production miss that quarter. The process has an almost agricultural quality to it, you are farming bacteria, and like any farming operation it is subject to conditions you cannot fully control. POX, by contrast, is an enclosed industrial process. Temperature is set by the operator, not by the weather.

Roasting. Old technology. The ore is heated in a furnace, the sulfides burn. Produces sulfur dioxide gas, which has to be scrubbed. If the ore contains arsenic (which arsenopyrite by definition does), the roast gas contains arsenic compounds that require specialized capture and disposal. Roasting works, it has been done for over a century, and in some situations it is still the right answer. It is the least popular of the three for new projects because of the emissions issue.

Choosing among these three is an irreversible decision. The infrastructure is completely different. A mine built around a POX circuit cannot switch to BIOX without ripping out the autoclave and building bio-leach tanks from scratch. The choice is made during feasibility, based on extensive metallurgical test work, and the mine lives with it for its entire life.

Heap leaching. A different processing route entirely, for ore that is too low-grade to justify the cost of a conventional processing plant. Ore is crushed (not ground, which eliminates the most expensive step) and stacked on an impermeable liner pad. Cyanide solution is drip-irrigated onto the top of the heap. It percolates slowly downward through the ore over weeks to months, dissolving gold as it goes. The pregnant solution is collected at the base and sent to a recovery circuit. Recovery rates are 60% to 75%, much lower than the 85% to 95% achieved by conventional milling and leaching. The tradeoff is vastly lower capital and operating cost. Heap leaching makes it viable to mine ore grading as low as 0.3g/t in some cases. Nevada is full of heap leach operations. Climate affects heap leach performance. Freezing weather slows or stops percolation. Heavy rain dilutes the leach solution. Some operations cover their heaps with tarps or build roofing structures.

By-products. Gold deposits often contain silver, copper, sometimes cobalt. Revenue from selling these metals gets credited against operating costs and shows up in AISC calculations as by-product credits. At some mines the credit runs 100 to 200 dollars per ounce of gold. A mine carrying that level of by-product credit has part of its economics tied to the copper or silver price, not just gold. When copper drops 30%, the AISC of that "gold mine" goes up.

Doré bars in transit. Mine to refinery can be over a thousand kilometers. Each bar is worth hundreds of thousands to millions of dollars. In some gold-producing countries the security and insurance costs associated with this leg of the supply chain are meaningful for marginal operations.

~1300
$/oz median AISC
40%+
Energy on grinding
80%+
Gold via cyanide
60–75%
Heap leach recovery
09

AISC

All-In Sustaining Cost. Dollars per ounce. Cash operating costs, sustaining capital expenditure, corporate overhead allocated to the mine, brownfield exploration, and mine closure accruals. The World Gold Council introduced this standard in 2013. Before that, every company reported costs differently and comparison was nearly impossible.

Global median is somewhere around 1300 dollars per ounce. Wide distribution.

The metric is self-reported. Companies have discretion in how they classify spending between sustaining and expansion categories. Shifting some sustaining capital into the expansion bucket lowers the reported AISC. The metric excludes initial construction capital (already spent before the mine started). It says nothing about how many years of reserves remain. A low-AISC mine that is three years from exhaustion and a higher-AISC mine with twenty years of life ahead of it are fundamentally different investment situations, and AISC alone does not distinguish them.

10

Industry Structure

Top ten producers account for roughly 30% of global gold output. Newmont, Barrick, Agnico Eagle at the top. The past decade's strategic direction among the majors has been to concentrate portfolios on Tier 1 assets and dispose of everything else.

Juniors. Hundreds of them, listed on the TSX Venture Exchange in Toronto or the ASX in Australia. No revenue. Surviving on equity raises. The vast majority will fail. The few that make a significant discovery see their share prices multiply. Their ability to raise capital tracks market sentiment and gold price closely.

Large companies replenish reserves increasingly through acquisition rather than organic discovery. M&A volume spikes when gold is high and the majors have free cash flow. Many mid-tier companies are structured from inception around the expectation of being acquired. The business plan is to advance a project through feasibility, demonstrate enough value, and sell to a major. This is not cynicism, it is the openly acknowledged economic logic of the sector.

Franco-Nevada's long-term total shareholder return has beaten nearly every company that actually operates gold mines. This is a fact that anyone thinking about the gold mining industry should sit with for a while.

Royalty and streaming companies. Franco-Nevada, Wheaton Precious Metals. They provide financing to mines in exchange for a percentage of future revenue or the right to buy metal at a fixed discount. They do not operate mines, do not employ miners, do not manage tailings dams. They sit upstream of all the operational risk and collect a cut of the output. Franco-Nevada's long-term total shareholder return has beaten nearly every company that actually operates gold mines. This is a fact that anyone thinking about the gold mining industry should sit with for a while.

Consulting firms. SRK, Lycopodium, Ausenco, Amec (now Wood). These firms produce the feasibility studies, design the mines, audit the technical work. The Qualified Person signing the NI 43-101 technical report is frequently an employee of one of these firms, not of the mining company itself. Investors scrutinize the mining company's CEO and CFO and rarely ask which consulting firm did the technical work or what that firm's track record is on cost estimation accuracy. There are meaningful differences between firms.

The parasitic ecosystem around gold mining. This is something that does not appear in industry overviews and shapes the landscape enormously. In Vancouver and Perth, entire local economies revolve around the junior mining cycle. Capital market brokers specialize in reverse takeover (RTO) listings to get shell companies onto the TSX Venture Exchange. Report-writing shops produce NI 43-101 documents at varying levels of quality and rigor. Mining newsletter writers publish promotional content on junior companies, with the company paying for the coverage, usually disclosed in small print at the bottom. At the annual PDAC convention in Toronto, which draws 25,000 or more attendees, junior companies rent booths, print glossy brochures, run roadshow presentations, and host investor dinners. The goal is to stay alive for another financing round. The exploration industry's funding cycle has a self-sustaining character: investor money flows to exploration companies, and exploration company spending flows to drilling contractors, assay labs, consultants, lawyers, and conference booth fees, which in turn keep the ecosystem warm and the information circulating. In a gold bull market this cycle spins at high speed. In a bear market it nearly stops. The small offices on Howe Street in Vancouver, lit up and buzzing in a bull market, half of them dark and for lease in a bear market.

11

Pressures on the Industry

Grade decline and its cascading effects on energy consumption, water consumption, tailings generation, and cost have already been discussed in detail.

Water. Mineral processing consumes large volumes of water. Many important gold-producing regions are water-scarce. Western Australia, northern Chile, the Sahel belt in West Africa. Conflict between mines and agricultural communities over shared water sources has been a recurring issue in multiple countries. Some companies have invested in seawater desalination plants, which brings the water question back around to energy cost.

Brumadinho · Minas Gerais, Brazil · 2019

Tailings. The 2019 Brumadinho dam collapse in Brazil killed 270 people. It changed the industry's approach to tailings governance practically overnight. The Global Industry Standard on Tailings Management (GISTM) was established in the aftermath. Dry stacking, which dewaters tailings and stacks them as a solid rather than impounding them behind a dam, eliminates the catastrophic failure mode. It costs more. New projects are increasingly adopting it from the design stage. Retrofitting existing wet tailings facilities at operating mines is far harder: the cost is enormous, and the mine has to keep running during the transition.

Resource nationalism. Host governments adjusting the fiscal terms after a mine is built and producing. Increased royalty rates, windfall taxes, mandatory government equity stakes, restrictions on profit repatriation. Billions of dollars invested under one set of rules, and then the rules change. West Africa, Central Asia, Latin America have all seen this over the past decade. There is no financial instrument that hedges against sovereign policy risk. Top-tier mining companies increasingly pay premium acquisition prices for assets in jurisdictions with long track records of rule-of-law stability, primarily Canada and Australia.

Artisanal and small-scale mining, ASM. Roughly fifteen to twenty million people worldwide. Producing somewhere around 15% to 20% of global gold output. Mercury amalgamation as the primary extraction method, causing severe mercury contamination of waterways and soil. Child labor, illegal extraction, funding of armed groups, all present in varying combinations across different regions. International organizations have been attempting to formalize ASM operations and introduce mercury-free processing techniques. The progress is very slow because the root cause is poverty and the absence of alternative livelihoods.

People take a decade and a half to grow, and there is no shortcut.

The workforce. The generation of geologists, mining engineers, and metallurgists who built their careers in the 1980s and 1990s is retiring. University enrollment in mining engineering programs across North America, Europe, and Australia has been declining for fifteen years. Remote mine sites with fly-in-fly-out schedules are hard on families. A lot of graduates try the industry for a year or two and leave for tech or consulting. Mine automation is advancing (autonomous trucks, remote-controlled drill rigs, automated process control), but the gap between where automation is today and full replacement of experienced human judgment is wide. A Qualified Person capable of signing a NI 43-101 technical report needs ten to fifteen years of accumulated professional experience. Equipment is purchased. Deposits are discovered. People take a decade and a half to grow, and there is no shortcut.

12

Gold Price and Mine Behavior

Mine production plans are designed on ten to twenty year horizons. Short-term gold price fluctuations do not alter them. The price affects two things: whether marginal mines stay open or close, and whether new projects receive board approval for construction.

The lag between an investment decision and first production is over ten years. A decision taken in 2025 on the strength of 2000-plus dollar gold will not produce ounces until 2036 or later. Whatever gold is doing in 2036 has nothing to do with the conditions under which the decision was made.

High-grading. When gold prices are depressed, companies tend to selectively mine the highest-grade portions of the orebody to reduce unit costs and maintain margins. When gold prices are strong, they go after lower-grade material that would not have been economic at lower prices. The effect of persistent high-grading during downturns is that the best ore in the deposit gets consumed disproportionately early, shortening the mine's economic life. Detecting high-grading from the outside requires comparing the grade of ore actually mined each year against the average grade in the reserve model. If the mined grade is consistently and significantly above the reserve model grade for several years running, the company is likely high-grading. This is worth investigating carefully, because the rosy production numbers during the high-grading period will not be sustained.

Hedging. In the 1990s the gold mining industry routinely sold forward production at fixed prices using financial contracts. When gold entered its long bull run in the 2000s, companies locked into low-price forward contracts were forced to deliver gold at prices far below market value. Barrick Gold's hedge book became an infamous case: the company spent years and significant capital unwinding its hedge positions. The experience changed the industry's attitude toward hedging durably. Today most large gold miners do not hedge in size.

13

Supply Picture

Mine production represents about 70% to 75% of annual gold supply. The balance comes from recycled gold, primarily old jewelry being melted down and to a lesser extent precious metals recovered from electronic waste. Recycled gold supply is strongly correlated with gold price: higher prices draw more old jewelry out of dresser drawers and pawn shops.

Central banks hold over 35,000 tonnes of gold in their reserves. Central bank buying and selling is not driven by price. The motivations are reserve diversification and geopolitical positioning. In 2022 and 2023, central banks as a group were net buyers at a pace that was large relative to annual mine production. This kind of demand does not respond to price signals the way commercial demand does, and it introduces distortions into supply-demand models that are hard to capture with conventional analysis.

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