Fresh Thinking by Snowden Optiro

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.

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.

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.

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.

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