Fresh Thinking by Snowden Optiro

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EP 174 | Platinum: Is It Worth Its Weight in Gold?

Season 1 · Episode 174

Thursday, September 10, 2026 • Duration 11:03

Platinum is one of the world's rarest and most geographically concentrated metals, with applications spanning the automotive, industrial, jewellery and emerging hydrogen sectors. But what does its evolving supply and demand outlook mean for the mining industry?

In this episode of Fresh Thinking by Snowden Optiro, Senzeni Mandava Matondi and Julian Aldridge explore platinum's geology, market dynamics and strategic importance.

They discuss the concentration of global platinum supply, changing automotive demand, the potential role of hydrogen technology, substitution between platinum group metals (PGMs), supply constraints and the challenges of bringing new mines into production.

The conversation also considers what these trends could mean from a mining perspective, including the potential for renewed exploration, mine life extensions and new project development.

Subscribe to Fresh Thinking by Snowden Optiro for more technical discussions covering geology, resource estimation, mining and the commodities shaping the industry.

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EP 173 | The Theory of Sampling: Why Every Mining Decision Begins with a Representative Sample

Season 1 · Episode 173

Wednesday, September 2, 2026 • Duration 08:11

Was the sample representative?

Every geological model, resource estimate, grade control decision and reconciliation result ultimately depends on the quality of the samples behind it. In this episode of Fresh Thinking by Snowden Optiro, Melanie Bulley is joined by Senzeni Mandava Matondi to explore the Theory of Sampling and why representative sampling is fundamental to reliable decision-making throughout the mining value chain.

They discuss why natural heterogeneity makes sampling challenging, the difference between correct and incorrect sampling errors, why precision should not be confused with representativity, and why even highly precise laboratory analysis cannot correct a sample that was unrepresentative from the beginning.

The episode also explores the practical consequences of poor sampling, including ore loss, dilution, poor reconciliation and unreliable resource estimates. In this episode:

Why sampling is the foundation of mining data
Understanding representativity and natural heterogeneity
Correct vs. incorrect sampling errors
Precision vs. representativity
Why laboratories cannot fix poor sampling
The impact of sampling on grade control and reconciliation
Principles of good sampling practice

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EP 172 | Tailings Are Not Just Relocated Ore: The Nuances of Tailings Mineral Resource Estimates

Season 7 · Episode 172

Wednesday, August 26, 2026 • Duration 13:17

Tailings Mineral Resource Estimates can appear straightforward. The material has already been mined, crushed, processed and deposited in one location — but tailings facilities present their own unique set of technical challenges.

In this episode of Fresh Thinking by @SnowdenOptiro , Senzeni Mandava and Melanie Bulley explore the nuances of estimating Mineral Resources within tailings facilities. They discuss how tailings differ from conventional in situ deposits and why depositional engineering, rather than natural geological controls, can become fundamental to understanding continuity.

opics covered include:

Density and moisture uncertainty
Sampling unconsolidated and saturated material
Variography and spatial continuity in tailings • Depositional history and hydraulic segregation
The importance of the phreatic surface and hydrogeology
Metallurgical recoverability and project economics
Mineral Resource classification
Tailings reprocessing, critical minerals and ESG considerations

As Senzeni and Melanie discuss, a tailings facility is not simply a relocated orebody. It is an engineered, evolving sedimentary system with its own geotechnical, hydrogeological, metallurgical and operational complexities.

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EP 171 | Part 2 of 2: Managing Uncertainty - How Better Grade Control Leads to Better Decisions

Season 1 · Episode 171

Wednesday, August 19, 2026 • Duration 06:35

In Part 2 of our Fresh Thinking by @SnowdenOptiro two-part series, host Melanie Bully is joined by Senzeni Matondi to continue the discussion on why the most expensive mistake in grade control isn't necessarily mining low-grade material — it's making the wrong decision about whether material is ore or waste.

Following on from Part 1, this episode explores how mining operations can make better grade control decisions by understanding and managing uncertainty.

Melanie and Senzeni discuss why average grade alone doesn't tell the full story, how conditional bias and grade smoothing can affect ore and waste classification, and why local accuracy around the cut-off grade is so important.

They also explore grade control as a complete value chain — from sampling, QA/QC and geological logging through to estimation, dig planning, mining execution, stockpile management and mine-to-mill reconciliation. The conversation then turns to modern approaches to uncertainty and risk, including conditional simulation, probability-based ore classification and risk-based digline optimisation.

In this episode Melanie and Senzeni discuss:

Why two models with similar average grades can deliver very different operational outcomes
Conditional bias and the impact of grade smoothing
The importance of local accuracy around the cut-off grade
How ore loss and dilution result from misclassification • Why reconciliation reflects the performance of the entire grade control system
Moving from deterministic estimates to risk-informed decision-making
What best-practice grade control looks like at high-performing operations

The key message from this two-part series is simple: grade control isn't about producing the perfect block model — it's about consistently making better mining decisions.

EP 170 | Part 1 of 2: Why the Most Expensive Mistake in Grade Control Isn't Low Grade

Season 1 · Episode 170

Wednesday, August 12, 2026 • Duration 04:57

What if the most expensive mistake in grade control isn't mining low-grade material — but making the wrong decision about what is ore and what is waste?

In this two-part episode of Fresh Thinking by Snowden Optiro, Senzeni Matondi, Principal Consultant, joins Melanie Bully, Senior Consultant, to explore why grade control is fundamentally a decision-making discipline, not simply a grade estimation exercise.

In Part 1, Senzeni and Melanie unpack the operational and financial consequences of misclassification, including:

Ore loss — when valuable material is classified as waste and potentially lost forever
Dilution — when waste enters the ore stream, reducing head grade and consuming valuable processing capacity
Misclassification — and why it can result from accumulated uncertainty across sampling, geological interpretation, estimation, blast movement, survey accuracy and mining execution
Reconciliation — and why poor reconciliation can reflect issues across the entire mining value chain, rather than the resource model alone

The key takeaway? A technically sound grade estimate is only useful if it supports the right operational decisions.

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EP 169 | Why Good Estimates Can Still Produce Poor Reconciliation

Episode 169

Thursday, August 6, 2026 • Duration 06:58

If your resource model is statistically robust, why doesn't it always reconcile with production?

In this episode of Fresh Thinking by Snowden Optiro, Melanie Bulley and Senzeni Mandava Matondi explore why good resource estimates can still lead to disappointing reconciliation results.

They discuss the impact of grade smoothing, explain the concept of conditional bias, and explore why reproducing the average grade is only part of the story. The conversation also covers practical techniques used by resource geologists to assess estimation performance and improve local predictions that support better mining decisions.

Whether you're working in resource estimation, grade control or mine reconciliation, this episode offers practical insights into bridging the gap between statistical accuracy and operational performance.

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EP 168 | When Geology Isn't Enough - Using Categorical Indicator Kriging to Model Diffuse Mineralisation

Season 1 · Episode 168

Wednesday, July 29, 2026 • Duration 08:30

How do you model mineralisation when geological boundaries aren't clearly defined?

In this episode of Fresh Thinking by @SnowdenOptiro , Senior Consultant, Melanie Bulley is joined by Principal Consultant, Senzeni Matondi to explore how Categorical Indicator Kriging (CIK) can be used to model diffuse mineralisation more objectively and consistently.

The discussion covers:

Why traditional wireframing can be challenging in diffuse deposits
How probability-based domaining improves consistency
The role of CIK in reducing subjectivity
Building more robust and defensible resource models

Whether you're a resource geologist, geostatistician or mining professional, this episode provides practical insights into one of the industry's most powerful domaining techniques.

Subscribe for more conversations on resource estimation, geostatistics and mining best practice from the experts at Snowden Optiro.

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EP 166 | What Consultants See That Mine Sites Miss: Lessons in Mine-to-Mill Reconciliation

Season 1 · Episode 166

Wednesday, July 1, 2026 • Duration 11:58

What do consultants see that mine sites often miss?

In this episode of Fresh Thinking bySnowden Optiro, Rayleen Hargreaves is joined by Ian Glacken to discuss the most common mine-to-mill reconciliation challenges, from stockpile management and siloed teams to understanding variance and improving decision-making.

Learn why reconciliation is more than a monthly report—it's a powerful tool for improving mine performance.

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EP 164 | Critical vs Strategic Minerals: Which Commodities Matter Most?

Season 1 · Episode 164

Friday, May 29, 2026 • Duration 05:06

Which commodities matter most in the global race for critical and strategic minerals?

In this episode of @SnowdenOptiro Fresh Thinking podcast, Senzeni Mandava Matondi is joined by Julian Aldridge and Laurie Hassall to explore the commodities that consistently appear on critical minerals lists around the world and the factors driving their importance.

The discussion examines key battery minerals including lithium, cobalt, nickel, manganese and graphite, alongside rare earth elements, tungsten and aluminium. The team also explores how geopolitical considerations, supply chain security and processing capability influence whether a mineral is considered critical or strategic.

Topics covered include:

The common commodities found on national critical minerals lists
The growing importance of rare earths and tungsten
Why aluminium is increasingly viewed as both critical and strategic
How Indonesia's nickel production is influencing global markets
China's role in downstream processing and critical mineral supply chains
The relationship between resource availability, processing capacity and strategic importance

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EP 163 | Critical vs Strategic Minerals: What's the Difference?

Season 1 · Episode 163

Friday, May 29, 2026 • Duration 10:30

What makes a mineral critical? What makes it strategic? And why are governments around the world racing to secure supplies of certain commodities?

In this episode of Fresh Thinking by Snowden Optiro , Senzeni Mandava Matondi, Julian Aldridge, and Laurie Hassell explore the growing importance of critical and strategic minerals in today's economy. From copper, lithium and rare earth elements to gallium and germanium minerals, the discussion examines how countries define these resources and why those definitions matter.

The team explores:

The difference between critical and strategic minerals
Why supply risk matters
The role of minerals in national security and defence
Food security and fertiliser-related commodities
How critical mineral lists differ between countries
The influence of processing capability and intellectual property
The minerals driving the energy transition

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Fresh Thinking by Snowden Optiro – Details, episodes & analysis

Podcast details

Recent rankings

Apple Podcasts

Spotify

Shared links between episodes and podcasts

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Publication history

Latest published episodes

Related Shows Based on Content Similarities

Related Shows Based on Content Similarities

Apple Podcasts

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Fresh Thinking by Snowden Optiro – Details, episodes & analysis

Podcast details

Recent rankings

Apple Podcasts

Spotify

Shared links between episodes and podcasts

Other29

Youtube57

LinkedIn6

RSS feed quality and score

Publication history

Latest published episodes

Similar podcasts and content

Related Shows Based on Content Similarities

Related Shows Based on Content Similarities

Other29

Youtube57

LinkedIn6

Apple Podcasts

Spotify