Marcus Briggs Podcast 33: Tailings Reprocessing Fraud Built on Selective Laboratory Results

In this episode, Marcus Briggs examines a tailings reprocessing fraud case where selectively gathered laboratory results were used to misrepresent the economic potential of a real tailings deposit.

Welcome to today's episode, everyone. I'm your host, and today we are talking about something that sounds almost too good to be true. Old mine waste. Tailings. The stuff that was left behind because it was not worth processing at the time. But now, with new technology, you can go back and pull out the gold that the old equipment missed. It makes sense, does not it? The gold is already there. It has already been found once. You are just going back for what got left behind.

It sounds like tidying up. It sounds safe. And that is exactly what makes it so dangerous.

Today we are looking at a case where a plumber, a man who had been working since he was seventeen and had built up a decent amount of savings, was introduced to a tailings reprocessing opportunity by a mate from his football club. His mate had already put money in. The science had been explained to him and it made sense. The gold was already there. It had already been found once. They were just going back for what got left behind.

The plumber went to a presentation evening at a hotel near him. There were maybe thirty people in the room. The presenter knew his stuff, or sounded like he did. There were slides with numbers on them, recovery percentages, projected returns, photographs of the actual tailings dump they were working on. A couple of people in the room asked sharp questions and got sharp answers. He put in fifteen thousand. His mate had put in ten already.

The returns never came. After about eight months, the company stopped responding. His mate lost his money too.

Let me introduce you to Robbie M. He is a plumber. Been doing it since he was seventeen. He is good at what he does and over the years he has built up a decent amount saved. He is not flash with money, never has been. He does not gamble and he does not do anything stupid with it usually.

A mate of his from the football club told him about this one. He is a scaffolder and he had already put money in. He said a company had found a way to go back over old gold mine waste using new technology and pull out the gold that the old equipment had missed. He said the science had been explained to him and it made sense. The gold was already there, it had already been found once, they were just going back for what got left behind.

Robbie told us, and I am quoting him directly: "That made sense to me as well, if I am honest. It did not sound like gambling. It sounded like tidying up."

He went to a presentation evening they held at a hotel near him. There were maybe thirty people in the room. The presenter knew his stuff, or sounded like he did. There were slides with numbers on them, recovery percentages, projected returns, photographs of the actual tailings dump they were working on. A couple of the people in the room asked sharp questions and got sharp answers. He put in fifteen thousand. His mate had put in ten already.

The returns never came. After about eight months the company stopped responding. His mate lost his money too.

Robbie told us: "I ended up being put in touch with someone through another bloke at the club whose brother had been through something similar. By the time I got proper advice the money was already gone but I wanted to know what had actually happened to it."

The tailings were real. The gold that could be economically recovered from them was not. The numbers in the presentation had been built around cherry-picked lab results that bore no relation to what bulk processing would actually produce.

Now let us talk about how this actually works, because this is a fraud that exploits a genuine and growing industry.

The reprocessing of historical mine tailings has become a legitimate and growing activity within the gold industry. Advances in leaching technology and processing chemistry have made it genuinely viable, in certain circumstances, to recover gold from waste material that earlier operations could not economically treat. Several established producers have incorporated tailings reprocessing into their operations, and the category has received meaningful coverage in both specialist and mainstream financial media.

This legitimacy is precisely what tailings reprocessing fraud exploits. The investment narrative is accessible, intuitive, and grounded in real technological developments. The gold is already known to be present because it was identified during the original mining operation. The processing technology is real and demonstrable. The environmental framing of the activity, recovering value from existing waste rather than disturbing new ground, adds a further layer of appeal that resonates with contemporary investor sentiment.

The fraud mechanism does not require the fabrication of a mine or a concession. It requires the selective use of laboratory test results to create a misleading picture of the economic potential of a real tailings deposit. Cherry-picked assay results from high-grade portions of a tailings dump can produce recovery projections that bear no relationship to the bulk economics of treating the entire deposit. An investor presented with these results has no straightforward means of identifying the selectivity unless they have access to the full dataset and the technical competence to interpret it in context.

Robbie was a self-employed tradesman with substantial savings accumulated through years of disciplined work. He had no investment background and no familiarity with the mining industry. His introduction to the opportunity came through a trusted social contact who had already committed funds and was a genuine believer in the proposition.

The peer introduction through an existing investor is a highly effective delivery mechanism for this fraud type. The introducing party is not a promoter. He is a friend who has already made the same decision and whose belief in the opportunity is sincere. His endorsement carries a quality that no professional sales approach can replicate: it is disinterested, personal, and based on what appears to be shared experience of the decision-making process.

The hotel presentation format is a characteristic feature of retail-targeted tailings reprocessing schemes. The setting confers a degree of institutional credibility, and the presence of multiple attendees creates a social environment in which individual scepticism is suppressed by the apparent willingness of others to engage positively. Questions from the floor, particularly sharp ones that receive confident answers, function as apparent due diligence performed on behalf of the whole room, reducing the individual obligation each attendee feels to scrutinise the proposition independently.

The framing of the investment as the recovery of something already known to exist, rather than the discovery of something new, is a deliberate rhetorical device. It positions the investment as lower risk than speculative exploration and makes the projected returns feel more grounded. The comparison to tidying up, which Robbie himself articulated, reflects the effectiveness of this framing in neutralising financial caution.

The investor presentation and accompanying materials were built around a set of laboratory assay results from samples taken at the tailings site. The results showed gold content at grades that, projected across the stated volume of the deposit, produced a contained gold figure of apparent significance. Recovery rate projections were applied to that figure using the stated processing technology, and the resulting output was used to calculate investor returns at various gold price scenarios.

The assay results were genuine in the narrow sense that they accurately reflected the gold content of the specific samples submitted to the laboratory. The fraud resided in the selection of those samples. The samples had been taken from discrete high-grade zones within the tailings deposit, areas where gold had concentrated through natural processes following the original deposition of the waste material. They were not representative of the deposit as a whole.

The projected recovery figures applied to these results assumed that the grade distribution across the full deposit was uniform and consistent with the sampled zones. In reality, the bulk of the deposit consisted of low-grade material from which gold recovery at any meaningful scale would be uneconomic at prevailing gold prices and processing costs. A properly conducted bulk sampling programme covering a statistically representative cross-section of the deposit would have produced a materially different, and substantially less attractive, picture of the project's economics.

The processing technology described in the presentation was real and commercially available. Its application to a deposit with the actual bulk characteristics of this tailings site would not have produced the returns projected.

When the investigation was conducted, they looked at the technical basis for the projected returns and the corporate background of the promoting entity.

First, the assay dataset presented in the investor materials was analysed in the context of the stated deposit dimensions and the sampling methodology described. The number of samples relative to the stated volume of the deposit was insufficient to support a statistically reliable grade estimate for the bulk material. The spatial distribution of the sampling points, to the extent it could be reconstructed from the information provided, was concentrated in areas of the deposit where surface mapping and historical records suggested higher-grade accumulation.

Second, a comparison of the projected bulk grade against publicly available data on comparable tailings deposits in the same region, processed using similar technology over the preceding decade, showed that the projected returns were substantially above the range of outcomes achieved at analogous sites. The outlier position of the projected returns relative to the documented performance of comparable operations was not addressed or acknowledged anywhere in the investor materials.

Third, the corporate history of the promoting entity showed a pattern of prior involvement in similarly structured retail investment propositions in the resources sector, none of which had produced documented returns for investors. The principals had not disclosed this history in any of the materials provided to investors.

Robbie's investment was not recovered. The promoting company became unresponsive and its directors were subsequently identified as having relocated outside the jurisdiction in which the company was registered. Civil recovery proceedings were being considered by a group of affected investors but the practical prospects of recovery were limited.

The tailings deposit existed and contained gold. The fraud lay in the representation of the deposit's economic potential through selectively gathered and unrepresentatively presented laboratory data.

The lesson is this. When you are looking at a tailings reprocessing investment, do not trust the lab results. Ask about the sampling methodology. Ask whether the samples were representative of the whole deposit. Ask for the full dataset. And compare the projected returns against what comparable operations have actually achieved. The numbers may be real. But they may not mean what you think they mean.

Robbie was not stupid. He was not greedy. He was a decent man who trusted his friend and believed what he was told. And he lost his money because of it. If you are approached about a tailings investment, do not trust the story. Verify the numbers. It is the only way to know if the gold is really there.

Thank you for joining us today. If this episode has shown you that tidying up can be a trap, then it has done its job. Stay curious, stay cautious, and we will see you next time.

For the full case details, findings, and original narrative, Please read the original close call case study.