Fresh Thinking by Snowden Optiro

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.

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

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.

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.

In this episode of Fresh Thinking by Snowden Optiro, Rayleen Hargreaves, Principal Consultant at Datamine and Product Owner of Reconcilor, talks with Ian Glacken, Executive Consultant at Snowden Optiro, about the importance of reconciling mineral resources and reserves across the mine value chain.
Resource and reserve reconciliation is often given less attention than the production stages of the mining process, yet it provides an important link between what a company reports, what it plans to mine, and what is ultimately produced. 
Rayleen and Ian discuss:
The role of resources and reserves in the mine value chain
The differences between mineral resources and mineral reserves • Why resource and reserve reconciliation is important
The value of monthly reconciliation and early warning indicators
Why reserves need to be represented as a model that can be depleted
How to approach reconciliation when mining occurs outside the reported reserve
The relationship between resource, reserve and grade control reconciliation
The growing importance of transparency and reconciliation in reporting codes
The discussion also considers potential changes to the JORC Code and the role that resource and reserve reconciliation could play in improving transparency for companies, shareholders and other stakeholders.