Last Updated on 25/09/2026
Gold miners have rarely been in a stronger financial position. Yet the large deposits needed to replace the ounces they extract are becoming increasingly difficult to discover.
In the early 1960s, geologists working in Nevada began finding gold in places miners had spent generations overlooking. The metal was not always concentrated in obvious, high-grade veins. In some cases, microscopic particles of gold were dispersed throughout enormous volumes of rock that appeared almost worthless to the naked eye.
Those discoveries eventually became the Carlin Trend, one of the most important gold-producing regions of the modern mining industry. Mines were developed, further deposits were discovered, and over time Nevada became synonymous with large-scale gold production.
For roughly six decades, the mining industry has been searching for another discovery on a similar scale.
Gold prices have risen at an extraordinary pace. Levels that once would have marked the peak of a commodity cycle are now being incorporated into mine plans and resource assessments. Mining companies are generating substantial margins, but that raises a more difficult question: where can they invest the money when the number of truly large gold assets available to acquire or develop continues to shrink?
Higher gold prices can extend the operating lives of existing mines, make lower-grade ore economically viable and transform previously marginal deposits into potential development projects.
What higher prices cannot do is create new geology.
The Ounces Have to Come From Somewhere
Every producing gold mine begins losing inventory as soon as operations start.
Ore is extracted, processed and sold, while reserves gradually decline. Mining companies can replenish those ounces by drilling around existing operations, converting resources into reserves or acquiring deposits from other companies. For major producers, acquisitions are increasingly becoming the quickest way to secure additional resources.
S&P Global considers discoveries containing more than two million ounces of gold to be major discoveries. By that definition, there were no major discoveries in either 2023 or 2024. Only six were recorded between 2020 and 2024, and the average size of discoveries during that five-year period was smaller than in the preceding decade.
That does not mean the world is running out of gold. The problem is the shortage of large, newly discovered deposits capable of making a meaningful difference to the reserves of major mining companies.
The acquisition market provides another indication of this trend.
Gold Fields acquired full ownership of Windfall in Quebec. Northern Star Resources bought De Grey and its 13-million-ounce Hemi system. Agnico Eagle has continued consolidating gold assets around its existing operations in Finland.
The strategy is relatively simple: when high-quality ounces cannot be discovered quickly enough, mining companies can purchase deposits that have already been identified.
The industry has plenty of capital.
What it lacks is new inventory.
Four Million Ounces Before the Next Hole
One potentially significant resource already identified is located in southern Ecuador.
Auro Metals acquired the Santa Barbara gold-copper project earlier this year. Its March 2026 resource estimate outlined 697,000 ounces of indicated gold and another 3.418 million ounces of inferred gold. In total, more than four million ounces of gold resources have been identified, together with nearly 494 million pounds of copper.
The estimate was based on approximately 22,000 metres of historical drilling from 56 diamond drill holes. The mineralised system extends more than 1.2 kilometres from north to south, about 600 metres from east to west and reaches at least 900 metres below surface. Mineralisation remains open both laterally and at depth.
Auro has since completed an additional 11,047 metres of drilling through its Phase I programme, covering 22 holes. Results from 17 holes have been released, while five remain pending.
The programme was primarily designed to fill gaps between historical drill holes, increase drilling density within inferred resources and obtain fresh core for metallurgical testing ahead of a future resource update.
Having more than four million resource ounces does not automatically make Santa Barbara a mine. Most of the existing inventory remains classified as inferred, the project has not yet established mineral reserves, and its engineering requirements, metallurgy and economic viability still need to be demonstrated.
However, Auro’s exploration strategy is moving beyond simply confirming the existing resource. The next phase of drilling is increasingly focused on determining where the Santa Barbara system ends.
The Boundaries Start Moving
Recent Phase I assay results provide some indication of why the company is expanding its exploration programme.
Hole DSB-68 was drilled into Santa Barbara South, currently regarded as the core of the known porphyry system. It intersected 905.22 metres grading 0.60 g/t gold and 0.12% copper, beginning only 56.5 metres below surface. The hole ultimately reached a depth of 1,282 metres, making it the deepest hole drilled at Santa Barbara to date.
Importantly, weaker mineralisation continued to the bottom of the hole.
That could prove more significant than the headline intercept itself. The hole ended because of the drilling rig’s technical limitations rather than because Auro had definitively reached the bottom of the mineralised system.
Two nearby holes provided additional evidence of the system’s potential extent.
DSB-69 returned two mineralised intervals, including 200.55 metres grading 0.59 g/t gold and 0.08% copper. Within that interval was a higher-grade section of 57.83 metres at 1.06 g/t gold.
DSB-70 intersected 262.5 metres grading 0.71 g/t gold and 0.10% copper from near surface, including 100.45 metres at 1.01 g/t gold.
Together, the results pointed to continued mineralisation down dip in DSB-69 and a deeper, higher-grade zone in DSB-70.
Auro has now moved directly into Phase II drilling.
The company plans to drill another 20,000 metres, with three additional rigs capable of drilling beyond 1,000 metres being brought onto the project. The focus is shifting from predominantly infill drilling toward testing gaps between known mineralised areas, stepping out toward new targets and following the system to greater depths.
A Phase III programme is expected to continue with additional step-out and resource-expansion drilling.
The objective of Phase II is therefore broader than simply confirming Santa Barbara’s current resource. Auro is now testing how far the mineralised system extends beyond the ounces already identified.
When Geology Becomes Inventory
A gold price of $4,500 can make many mining challenges easier to manage, but it cannot eliminate them.
A mining company with billions of dollars in cash can purchase another deposit. It cannot manufacture a new one. Ultimately, geology determines how much additional gold can be found.
Santa Barbara’s current resource remains constrained within a conceptual pit shell and does not yet establish economic viability. A significant portion of the resource is still classified as inferred.
At the same time, major producers are generating substantial amounts of cash just as the pipeline of large discoveries becomes increasingly limited.
The early discoveries in Nevada eventually revealed a gold system far larger than the miners at Carlin could initially see. Each additional drill hole helped redefine the boundaries of a geological system that would support mining operations for generations.
Santa Barbara already contains more than four million ounces of gold resources. Following another 11,000 metres of drilling, important parts of its boundaries remain unresolved.
Auro’s next task is to determine where those boundaries lie.
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