Coffee with Samso

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May 2026

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About the show

This is Coffee with Samso. Samso will have a coffee with someone about something that is interesting and from a different perspective in business. It is a simple coffee conversation with no formalisation of style.

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May 27, 2026Episode 21948 min

The Discovery of the Challenger Gold Mine – Gawler Craton, South Australia

There are discoveries that change a region's prospectivity forever. The Challenger Gold Mine in the Gawler Craton is one of them. In this episode of Coffee with Samso, I sat down with David Edgecombe, the geologist who was instrumental in the discovery of the Challenger Gold Deposit in outback South Australia. David is not simply a man who happened to drill a good hole. He is a geologist's geologist — one who understood the rocks, trusted the science, and applied a methodology that was, at the time, genuinely groundbreaking in this part of the world. At 1.2 million ounces of gold, Challenger remains an enigma in the Gawler Craton. There is nothing comparable within a radius of several hundred kilometres. And yet, as David explains, the discovery almost didn't happen. A single calcrete sample — one out of more than 3,600 collected — came back at 180 parts per billion gold. Move that sample 200 metres in either direction, and the number drops below 20 ppb. The story of Challenger is as much about luck as it is about the brilliance of the exploration strategy. What makes this conversation particularly compelling is that David takes us back to the very beginning — the regional sampling programs, the calcrete geochemistry methodology that Dominion Mining pioneered in South Australia, the moment that anomalous result came through on the fax machine late one evening, and the drilling program that confirmed one of the more significant gold discoveries in Australian exploration history. This is a conversation about discovery methodology, about what works and what doesn't, about the value of good science over noise, and about what the next generation of explorers should be looking for in one of Australia's most underexplored terrains. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso. Coffee with Samso - Episode 219 | The Discovery of the Challenger Gold Mine | Adelaide | South Australia Chapters 00:00 Start 00:10 Introduction 03:12 Introduction of David Edgecombe 04:32 The South Australian Connection 05:31 The South Hilda Project - The Beginning of Interest in Gold Exploration 06:08 - The Introduction of Exploration in the Challenger Area and Calcrete Sampling 06:58 The Realisation of Gold and Calcrete - Bounty Gold Mine 07:40 Adelaide Resources - Andromeda Metals Limited - Realisation of the Potential - Calcrete Sampling. 08:42 The Calcrete Sampling Program 10:29 Tightening of the Regional Sampling Program. - Initiating the Drilling Program. 11:22 The Discovery Hole - The Sixth Hole 12:37 Confirmation Hole - The Seventh Hole 13:02 The Mother Lode - Drilling the Lode Plunge 13:54 The Complication of Corporate Activities 14:33 Did David Think It was Going to As Big As It was? 16:29 Does David think Challenger is still feasible? 17:04 Is Challenger a Geochemical or Geophysical Discovery? 17:39 Geophysical was not Impactful in the Exploration 18:40 No Outcrop - Surface Description 19:27 Modern Explorers should go back to Calcrete Sampling 20:29 New Thoughts on Exploration - XRF 21:25 The Importance of Regolith 22:09 Did the MMI work ? 23:04 The XRF Sampling Potential 23:56 The Mystery of Sampling Points 24:28 Sampling the calcrete and soils with XRF. 25:21 The Naming of Challenger 27:09 Mineral Exploration takes time. 28:06 Was there a sliding doors moment that meant Challenger was not Discovered? 28:36 Timing of the Discover soil sample. 29:09 Was It a Eureka moment? 29:21 Closest Sampling result 29:41 Infill Discussion 30:37 Latest Gold Potential in Gawler 31:19 Could the same exploration style work today in 2026? 32:16 Should we go back to Calcrete sampling ? 34:15 Was there much Iron in the Challenger Area? 35:57 Is Challenger Alone ? 37:17 The Element of Luck 38:22 How close were you to missing the target ? 39:33 Other Sampling Techniques ? 40:37 Interpretation of the Other sampling Techniques ? 42:09 What Would David Tell A Younger Geologist? 44;03 The Wisdom of Age ? 44:34 Any last minute Wisdom to share? 45:20 The Myth of Geologist Destroying the Environment 46:29 David The Geologist. 47:20 Conclusion 47:20 Conclusion

April 28, 2026Episode 21752 min

The Discovery of the Paris Silver Deposit

Coffee with Samso – John Anderson and the Thinking Behind the Paris Silver Discovery There are mining discoveries, and then there are stories about why discoveries happen. The difference matters. In this episode of Coffee with Samso, I sat down with John Anderson, the geologist most closely associated with the discovery of the Paris Silver Deposit on South Australia's Eyre Peninsula. John is not just another explorer who drilled a successful hole. He represents a generation of geologists who built discoveries through persistence, pattern recognition, and the willingness to challenge accepted geological thinking. This conversation was less about one silver deposit and more about how discoveries are made when ideas are allowed to mature over decades. The Geologist Behind the Discovery John Anderson was born in South Australia and developed an early fascination with rocks, fossils, and the natural world. He graduated from the University of Adelaide in 1975 with studies in geophysics and geology before starting a career that would take him through some of Australia's most important mining districts. His early years included underground work at Broken Hill, nickel exploration around Kalgoorlie, tin projects, and later senior exploration roles with major mining groups. These experiences shaped a style of thinking John repeatedly referenced in our discussion — understanding how systems form, not simply where anomalies sit on a map. That distinction is critical. Many people talk about targets. Fewer talk about mineral systems. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso. Coffee with Samso - Episode 217 | The Discovery of the Paris Silver Deposit | Adelaide | South Australia

April 15, 2026Episode 22445 min

Echo IQ Limited – AI Diagnostics, Mayo Clinic & Hypergrowth

Coffee with Samso – Echo IQ Limited: AI Diagnostics, Mayo Clinic & the Path to a Cardiovascular Platform A much awaited Coffee with Samso conversation with Dustin Haines from Echo IQ Limited (ASX: EIQ)is all about a clear investment narrative: this is not just an AI story, but a proven data-driven healthcare business building a scalable diagnostic platform anchored in real clinical need. The main business for Echo IQ is in the cardiovascular diagnostics space, using artificial intelligence to analyse echocardiograms and assist physicians in identifying complex conditions such as aortic stenosis and heart failure. For those that are familiar in this space, this is where underdiagnosis remains a documented global issue. The business is built around clinical validation, regulatory pathways, and integration into hospital workflows, rather than purely theoretical AI capability. The discussion in this epoisode of Coffee with Samso does highlight the realisation of the business model, which lays out the following: Clinical-grade AI with regulatory validation (FDA pathway) Access to a large, longitudinal echocardiography dataset (~2.2 million records) A clear commercial pathway into hospitals via existing diagnostic infrastructure The Echo IQ story is no longer a "build it and hope" model. The recent news and what appears to be even more validation when the current FDA approval gets the tick, is that the business is now a measured progression from validation → approval → integration → revenue, which is what the market is valuing its future. This is often where many early-stage AI healthcare companies fall short. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso.

April 8, 2026Episode 22348 min

Coffee with Samso – Iron Bear Resources Limited (ASX: IBR) – A Magnetite Story Positioned for Steel Decarbonisation

A Magnetite Iron Ore Project Sitting Where the Market Is Going - Steel Decarbonisation In this episode of Coffee with Samso, we are having a conversation with Iron Bear Resources Limited again since May 2025. The business has progressed and we are now anticipating the release of the Pre Feasibility Study which will be the platform that begins the studies towards a Decision To Mine. As a shareholder of the company, these are exciting times as the path forward is all about creating the building blocks that will shape the valuation of the business. Currently at AUD $50M, this has got to be the most undervalued stock on the ASX. The story is now about creating the understaning of where the steel industry is heading. This is the beginning of a Magnetite Iron Ore story that is all about Steel Decarbonisation. Iron Bear's project sits in the Labrador Trough in Canada, a region already proven by operators such as Rio Tinto, Champion Iron, and BHP. The infrastructure exists, the geology is understood, and the industry has been operating there for decades. What makes Iron Bear different is not just the size of the resource. It is where that resource fits into the future of steelmaking. The Iron Bear story is not about discovery risk. It is now all about execution. This is a project that already sits within an established iron ore province, with infrastructure, scale, and a partner that understands the market better than most. The key shift is the steel industry itself. Decarbonisation is not optional, and the move toward direct reduction steelmaking is creating a demand for high-grade inputs that are not widely available. From a Samso lens, this is a story where the market may not yet be fully connecting the dots. The involvement of a major like Vale changes the development equation, but it also requires investors to look beyond traditional junior mining narratives. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso. Coffee with Samso - Episode 223 | Iron Bear Resources Limited (ASX: IBR) | The University Club | Crawley | Western Australia Chapters 00:00 Start 03:09 What is Iron Bear and why does the project matter today? 05:23 How does Iron Bear fit into the global iron ore and steel decarbonisation story? 18:41 Why is the market not fully valuing Iron Bear's story? 23:29 Is the Market not Appreciating the Vale Partnership 28:31 What makes the geology unique compared to other large-scale iron ore systems? 30:54 Are the geological details consistent? 31:46 What are the key risks investors should understand? 34:00 How is Iron Bear addressing social licence and environmental responsibility? 39:32 Are the current geopolitical concerns pushing the thoguht of Nationalism ? 41:38 What are the key milestones and work program ahead? 44:25 What could drive a re-rating in valuation? 45:49 Corporate Activities and Vale Relationsip. 47:23 Conclusion

April 4, 2026Episode 22237 min

OD6 Metals (ASX: OD6) – Quinn Fluorspar Project Nevada: US Critical Minerals Opportunity Explained

In this episode of Coffee with Samso, Noel Ong sits down with OD6 Metals Limited Managing Director Brett Hazelden and Chief Technical Officer Dr. Darren Holden to unpack the company's acquisition of the Quinn Fluorspar Project in Nevada, USA. The discussion centres on why OD6 has expanded beyond its rare earths and copper portfolio into fluorite (fluorspar), a critical mineral increasingly tied to global supply chain security. The project aligns with the United States' push to secure domestic sources of key industrial inputs, particularly given its current reliance on imports and dominance of supply from China. From a geological perspective, the Quinn Project presents a replacement-style epithermal system with historical production and multiple high-grade occurrences. The team outlines evidence of scale through an 8 km alteration corridor, supported by hyperspectral data, suggesting potential for a larger mineralised system beneath surface expressions. OD6 Metals And The Economics of Fluorspar The conversation also explores the economics of fluorspar, including product types, pricing benchmarks, and processing pathways. With grades reported significantly higher than comparable ASX-listed peers, OD6 is positioning the project as a potential bulk-tonnage, high-grade operation targeting the US market. Beyond geology, the broader narrative focuses on timing. The intersection of critical minerals policy, US government funding, and infrastructure advantages in Nevada creates a strategic backdrop that could support project development. The discussion highlights how Australian exploration expertise can bridge a gap in the US junior mining sector. As with all early-stage projects, the key variables remain scale, grade, and execution. The next steps for OD6 Metals Fluorspar project will be back to basics, sampling results, drilling, and resource definition. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso. Chapters 00:00 Start 01:21 Introduction to Od6 Metals Limited 02:57 Introduction to Fluorspar 04:34 What do we look for with a Fluorspar project? 07:52 Replacement vs Vein Style Deposits 08:41 Is the Business of Mining a Fluorspar Deposit Complex? 10:45 What is the Potential Size for the Quinn Fluorspar Project? 12:04 What is the pricing of the Fluorspar product ? 13:57 Market Size ? 14:36 How Easy is A Fluorspar Discovery ? 17:11 Nationalism of Projects 20:32 Are the Capital Markets Friendly to the Fluorspar Story ? 23:23 Quick Mining 24:17 The Exploration Upside 28:10 Endowement of the Quinn Fluorspar System? 30:59 Other Mega Projects in Nevada with Fluorspar in Nevada 31:51 Fluorspar as a by products 32:23 Fund Raising for the Quinn project 33:23 Whats Next for OD6 Metals ? 34:52 Technical Last Words 36:01 Brad Last Words 36:25 Darren Last Words 37:05 Conclusion

March 31, 2026Episode 22042 min

Kaiser Reef Limited (ASX: KAU) – Henty Gold Mine Acquisition Driving Cash Flow and Growth

Coffee with Samso - Episode 220 | Kaiser Reef Limited (ASX: KAU) | The University Club | Crawley | Western Australia There are moments in the ASX mining space where a transaction changes everything for a company. This Coffee with Samso conversation with Brad Valiukas from Kaiser Reef Limited is one of those moments. Filmed back at Samso HQ at the University of Western Australia, this discussion centres on what I described as an "overnight producer" story—driven by the acquisition of the Henty Gold Mine. And in many ways, that label fits. The "Overnight Producer" – What Changed? Kaiser Reef's acquisition of the Henty Gold Mine has effectively repositioned the company from an explorer-developer into a cash-flowing gold producer. Brad walks through the structure of the deal, and what stands out is its balance: Combination of cash and scrip consideration Deferred gold payments (linked to production) Retention of Catalyst Metals as a ~20% shareholder Strategic optionality via infrastructure (Maldon plant exposure) From a Samso lens, this wasn't just an acquisition—it was a business transition.

March 28, 2026Episode 22129 min

Tusker Minerals (ASX: TSK) – Building a Rutile Discovery Story in Cameroon & Malawi | Coffee with Samso

Coffee with Samso - Episode 221 | Tusker Minerals Limited (ASX: TSK) | Capetown - South Africa | Perth - Western Australia There are times when you revisit a story and it just feels different. This Coffee with Samso with Tusker Minerals Limited and CEO Cliff Fitzhenry is one of those moments. The last time we spoke in 2025, the narrative was still forming. This time around, you can see where things are heading. The conversation is not about ideas anymore. It's about execution. It sis about the Tusker Minerals Rutile story. The Rutile Story Has Moved – And It's Now About Scale What stood out early in the discussion is how much ground the company has covered — literally. The Cameroon portfolio has grown into something meaningful: The Central Rutile Project now sits at just under 9,000 km² Additional licences have been added to create a contiguous footprint Active exploration is ongoing across multiple targets This isn't a small exploration play anymore. When you start talking about this kind of landholding in a residual system, you are thinking in terms of province-scale potential. And that's really the angle here — not a single deposit, but the possibility of a new rutile province. I Samso Concluding Comments The Tusker Minerals Rutile is still an early-stage story, but it is progessing and the dust is settling and I feel the narrative is is clearer. You can see what Tusker is trying to build — a rutile-focused exploration play with scale in Cameroon and optional upside in Malawi. The infrastructure work in Cameroon is a big tick for me. That's not something you do if you're thinking short term. Zimba adds another layer. It's early, but it has the right signs. If that turns into something meaningful, it changes the story again. For now, this is about watching the results. If they start showing consistency, the market will catch up. Chapters 00:00 Start 02:21 Introduction to Tusker Minerals Limited 06:09 Cliff walking us through the latest ASX Release. 10:27 Can Tusker see any continuation of the mineralisation? 11:41 Is Malawi more a Titanium or a Rare Earth story? 12:42 How Do Tusker want potential investors to view its narrative ? 14:39 The Titanium Market 16:17 Is Graphite still a component of the business? 17:55 Is the recent hostilities in the Middle East affecting operations? 19:40 Any competition in Cameroon? 20:56 Where does Cliff see the future value creation coem from? 22:30 What thoughts of dissasters would keep Cliff awake at night? 24:05 Why would investors look at Tusker Resources? 26:02 What are the Capital market saying about the Titanium market? 28:05 A Good reporting standrad. 29:07 Conclusion

March 24, 2026Episode 21856 min

Investigator Silver Limited (ASX: IVR) – Paris Silver Project Set to Ride the Silver Bull Market

Coffee with Samso - Episode 218 | Investigator Silver (ASX: IVR) – Understanding the Leverage to Silver Through the Paris Project | Adelaide Markets | Adelaide | South Australia In this episode of Coffee with Samso, I had the opportunity to sit down with Lachlan Wallace, Managing Director of Investigator Silver Limited, to discuss what I would call a very timely story in the current commodities cycle. Silver has always been one of those metals that sits quietly in the background—until it doesn't. When it moves, it tends to move quickly, and often, the market is not fully prepared for what that means. What this conversation highlighted for me is not just the rising silver price, but how that price fundamentally changes the viability of projects like the Paris Silver Project in South Australia. In the words of Samso, get your favourite beverage and sit and listen to another great insight from Coffee with Samso.

March 21, 202653 min

Coffee with Samso: Rosewood Titanium Discovery Could Be a Major South Australian Project

In this episode of Coffee with Samso, Noel Ong sits down with the team from PTR Minerals Limited to discuss the discovery of the Rosewood Titanium Deposit in South Australia. This is a fascinating conversation with a team that carries strong exploration credentials, including members linked to the discovery of Prominent Hill. The discussion covers how PTR Minerals moved from its Petrotherm origins into minerals exploration, how the Rosewood discovery was made through field mapping and reinterpretation of historical data, and why this shallow high-grade titanium project may become a significant story in the Australian resources sector. The team explains the geological setting, the scale potential of the mineralisation, the importance of metallurgy, and why location, infrastructure, and jurisdiction could all work in the project's favour. Key discussion points include: The background of PTR Minerals and the transition from Petrotherm How the Rosewood Titanium Deposit was discovered Why boots-on-the-ground geology still matters The scale and grade potential at Rosewood Metallurgical work and development thinking The broader copper-gold upside within PTR Minerals If you enjoy independent and organic content on ASX companies, mineral discoveries, and exploration stories, subscribe to the Samso YouTube Channel and join the Samso community.

March 17, 2026Episode 21544 min

Coffee with Samso – The Discovery of the Prominent Hill IOCG Deposit, Gawler Craton, South Australia - The Discovery that Proved Mineral Exploration for Deposits Under Cover.

Coffee with Samso | Episode 215 | Adelaide Markets | Adelaide | South Australia Guest: Derek Carter – Managing Director (later Chair) of Minotaur during the discovery period Tony Belperio (Exploration Lead) – Exploration Manager Barry Van Der Stelt (Contract Geologist) – first recognition of copper Peter Reid (Senior Geologist) – senior geologist involved in the Prominent Hill work Introduction In this Coffee with Samso episode, I went back to Adelaide to sit down with the people who were there when Prominent Hill was found — the discovery that became one of South Australia's defining IOCG (Iron Oxide Copper-Gold) stories. This is not a corporate recap. It is a first-hand account of what actually happened in the lead-up to discovery, how the target was chosen, what the drillers and geologists saw in the core shed, and why a single drilling decision could have changed everything. The team shared the backstory from the early tenement holders right through to the Uranus prospect becoming Prominent Hill — and the reality is simple: discovery is often a chain of decisions, relationships, and technical judgement made under uncertainty. 1) Prominent Hill Was Not a "New" Area — It Was a Patiently Reworked Story A key point in the conversation was that the Mount Woods ground had history well before Minotaur. The tenements were originally held by Metals X, who worked the region from the late 1980s onward, focusing on magnetic features and drilling at least one early target. Later, Burmine Limited entered the picture, and then Normandy/Poseidon ran a helicopter-based gravity survey across the area. Burmine Limited (ASX code: BUR1) was an Australian-listed gold and minerals exploration and mining company active in the late 1980s and early-to-mid 1990s. It was primarily focused on Western Australian gold projects, notably operating the Copperhead mine near Bullfinch. This matters because it shows the reality of exploration cycles: ground can be worked, tested, and even partly understood — but still not properly unlocked until the right targeting logic arrives. 2) The Technical Pivot: Magnetics Were Useful, But Gravity Was the Key The story turned when the targeting mindset shifted. Earlier programs were chasing magnetic features — and while they were hitting copper-bearing magnetite breccias, there was a ceiling to the grades being intersected. The breakthrough came when the team could simultaneously interpret magnetics and gravity, and start looking at where these anomalies were offset from each other. The concept was simple but powerful: Magnetic anomaly = something magnetic Gravity anomaly = something dense Offset between the two can be the clue to a different part of the IOCG alteration system This is where the conversation became very "real exploration": data doesn't tell you it's mineralised. It tells you where you should be brave enough to test. 3) 3D Modelling Was a "Game Changer" — And It Was New Back Then One of the most important takeaways was how early this team was in adopting 3D inversion modelling. Today we treat 3D models as routine. Back then, it was cutting-edge. The team explained how the modelling allowed them to rank targets properly, separate those already drilled from those not tested, and better understand the geometry of gravity and magnetic responses. In Samso terms: this was one of those moments where technology didn't replace geology — it amplified it. 4) "Uranus 1" — The Discovery Hole That Almost Looked Like Nothing The drill hole that changed everything was Uranus 1. Barry Van Der Stelt described the core and is the kind of detail that explorers remember for life: The core was so hematite-rich it was hard to even see textures. The team was washing core just to interpret it. The operation was low-budget — even the core cutting was done on a basic brick saw setup. Then came the moment: blue specks appearing after the core had sat for a couple of days. That blue tarnish was the first real visual signal of copper — and it triggered the call that brought the team running. This was also a reminder that Prominent Hill echoed the Olympic Dam story: sometimes the copper is not obvious until it's tested, altered, or routinely assayed. 5) The Numbers Were Bigger Than Anyone Expected The team admitted they initially thought they might have something like "30 metres of ~1% copper." Then assays came back with results that were materially stronger, including: a high-grade copper interval around 4% copper over ~30m, and broader zones around ~1% copper that they simply could not visually recognise in hematite breccia. Later, deeper drilling confirmed additional IOCG-style signatures, including: copper-gold mineralisation and uranium increasing at depth, reinforcing the Olympic Dam-style system interpretation. 6) The Sliding Doors Moment: Drilling the Flank, Not the Core This is one of the most valuable exploration lessons in the episode. After the discovery hole, infill gravity shifted the interpreted peak of the anomaly by several hundred metres. The team realised they had not drilled the very centre. The irony is that drilling into the "peak gravity" later hit barren, intensely altered hematite-silica core, which is now recognised as central IOCG alteration. The team openly discussed the risk: in 2001, if they had drilled the core first and hit barren alteration, they might have walked away. That is a brutal truth about exploration: a discovery can be decided by where you hit a system first. 7) The Business Reality: Minotaur Had Only 19% — But It Was Enough One of the most interesting parts of the conversation was the structure. Minotaur's maximum share of the project was 19%, while the major partner (BHP/Billiton through the merger timeline) held the majority position. Minotaur's "cost" for that 19% wasn't cash — it was local geological knowledge and management. The team framed it with a simple idea that still applies today: Better to own a piece of something real than 100% of something you can't fund. This is a proper junior-to-major alliance lesson, and it explains how big discoveries are sometimes possible in down cycles. 8) Capital Cycles Still Matter The group reminded us that this happened during a period when market attention was elsewhere — the dotcom era, when exploration was not "in fashion." And yet, the discovery still drove a dramatic market response: strong share price movement, heavily oversubscribed shareholder participation, major legal/accounting work managing scale and compliance. The point wasn't hype. It was showing how quickly markets can change when geology delivers. What This Episode Really Shows This Coffee with Samso episode is a reminder that discovery requires: Local knowledge (not just imported models) Funding and deal-making (alliances matter) Technical courage (you still have to drill the target) Open-minded thinking (don't get trapped by one model) A tolerance for failure (because near-misses are common) Prominent Hill wasn't found because everything was obvious. It was found because the team kept moving forward, making decisions with imperfect data, and backing their judgement. Samso Concluding Comments For me, episodes like this are part of documenting the real value chain of discovery. A lot of people talk about the "next Olympic Dam" like it's a marketing phrase. This conversation shows what that actually looks like in practice: long lead times, multiple parties, tight budgets, imperfect data, and a team that had the discipline to keep testing. If you want to understand how IOCG discoveries really happen — this is one to watch.