Exploration and discovery is what I’m most passionate about. And when I think about who, how, and why these discoveries happened, I tend to fall down rabbit holes.
One of them over the weekend was Olympic Dam. And instead of keeping it to myself, I thought I’d share because this isn’t just a mine. It’s a story of stubborn geology, billion-dollar bets, and patience that most investors today would never tolerate.
A theory becomes a target
The story starts not with a drill rig, but with a theory. In 1972, a young geologist named Douglas Haynes at one of Australia’s greatest companies, Western Mining Corporation (WMC), developed a new model for copper. He argued that oxidised fluids leaching continental basalts could carry copper upwards along faults, dumping it into domed sedimentary traps.
It was radical thinking for the time. But WMC backed it. By 1974, geophysicist Hugh Rutter was combing through gravity and magnetic maps of South Australia’s Stuart Shelf. He found a subtle anomaly near Roxby Downs. Haynes pointed at it and said, “That’s the one.”
In July 1975, WMC drilled RD1. At 353m down, the company hit 38m @ 1.05% copper with uranium, gold, and silver. Not a discovery hole just yet, but it proved the model worked.
The next eight holes were mostly disappointing. RD3, RD4, RD6, and RD7 were dead. RD5 and RD8 showed only low-grade hints. RD9 was forgettable and by now, if this were any junior, the stock would be trading back down at cash or below.
It took 15 long months before RD10 hit the discovery hole, 170m grading 2.09% copper and 630 parts per million uranium. That single hole changed South Australian mining forever. The message for investors is clear, world-class deposits don’t reveal themselves instantly. Olympic Dam required a model, patience, and the courage to drill through failure.
By the late ’70s, WMC had outlined a resource of more than 2 billion tonnes @ 1.6% copper, 0.06% U₃O₈, and 0.6 grams per tonne gold. It was the first ever recognised iron-oxide copper-gold (IOCG) deposit – a new category in global geology.
But scale brings cost. Developing Olympic Dam would require billions. In 1979, WMC cut a deal with BP Minerals, 51% WMC, 49% BP. Together, they’d attempt what no private Australian company had ever done: build one of the world’s largest copper-uranium mines in the middle of the desert.
The politics of ore
Big discoveries don’t exist in a vacuum. In 1982, the South Australian government passed the Roxby Downs Indenture Act, a bespoke mining law covering royalties, approvals, and even exemptions from later Aboriginal heritage laws.
That same year, WMC began sinking the first shaft, the Whenan Shaft, named after driller Ted Whenan. They also started building a new town, Roxby Downs, to house thousands of workers.
Not everyone cheered. Anti-uranium activists staged protests and vigils through 1983-84. Environmentalists worried about water drawdown from the Great Artesian Basin. Politicians argued about the role of uranium in Australia’s future.
That kind of pushback still happens today, all over the world, and what it tells us is that every discovery carries political risk. Investors today still underestimate how much time, legislation, and protest can shape a project’s path.
And here comes the mine
By 1987, 11 years on from initial discovery, the heavy lifting was complete, shafts sunk, power connected, processing plant built.
In 1988, after 12 years from discovery, Olympic Dam produced its first copper cathode and uranium oxide. Initial output was 45,000 tonnes of copper per year, modest, but a starter for growth. By 1989, the refinery was pouring gold and silver bars.
For WMC, it was vindication. For Australia, it was a new mining frontier. For investors, it was a reminder that big orebodies take big money, long timelines, and resilience measured in decades.
Through the ’90s, Olympic Dam expanded steadily. Output rose from 66,000 tonnes of copper in 1992 to 200,000 tonnes by 2000. In 1993, WMC bought out BP’s 49% share, consolidating control.
By 2002, production peaked at around 235,000 tonnes of copper. Olympic Dam had become the world’s largest uranium deposit and one of the top four copper mines globally.
WMC was a vertically integrated operation with mining, smelting, refining, and even a town. That model provided resilience against commodity swings and locked in long-term value.
The BHP Era
In 2005, BHP Billiton swooped in, acquiring WMC for $8.9 billion. Olympic Dam was the prize. BHP was thinking big. In 2006, it floated a $30 billion open-pit expansion — one of the largest mining projects ever contemplated. The idea was to turn Olympic Dam into a surface super-mine. But by 2012, the economics no longer stacked up, and the mega-expansion was shelved.
Instead, BHP pursued incremental growth, optimising underground operations, upgrading the smelter, and planning staged expansions. By 2024, Olympic Dam remained a cornerstone asset, producing over 200,000 tonnes of copper annually, alongside uranium, gold, and silver.
Even supergiants face cycles. Investors should treat expansion promises with caution; timing, costs, and commodity prices can rewrite the playbook overnight.
Olympic Dam’s story isn’t just geology. It’s stubbornness, risk, politics, and timing.
Haynes had a theory which at the time was wild but he stuck with it, and WMC backed him. That’s how discoveries usually start with someone prepared to sound a bit crazy.
Like always, it comes down to the drill bit. RD1 showed promise, but RD2 through RD9? shocking. Any junior would have been back trading at cash, if not worse. But WMC kept going. Then came RD10. That one hole we all wish we can be part of, from investors to geo to CEO.
Now the timeline from discovery to first copper cathode? Thirteen years. Try putting that in a corporate update deck for investors. Would they still be around? Probably not. Then the politics: protests, laws written for one mine, water debates. Big orebodies don’t exist in a vacuum. They drag in governments, activists, legislation. Always have, always will.
Something this big, even for WMC, needed BP’s wallet. Later BHP’s. No single mid-tier can shoulder a supergiant on its own.
Even today, Olympic Dam is still one of BHP’s crown jewels. But its DNA goes back to a few geologists who had the nerve to keep drilling when if it was today, the markets would have said stop.
The real question is this: if the next Olympic Dam is out there, who’s got the patience to keep drilling through RD10… or RD100?
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Images: Roxby Downs Council, Adelaide AZ, BHP Sponsored Village and Kokatha Country by Michael Coghlan, Olympic dam by Geomartin
