Fresh Thinking by Snowden Optiro7 Maj 2025

Ep 109: Part 2 - Resource Classification in Practice

In this episode of Fresh Thinking, Senior Consultant Dr Gregory Zhang and Executive Consultant Ian Glacken explore more advanced mineral resource classification methods.

Building on Part 1, they discuss the widely used 90/15 approach, delve into the role of scorecards, and discuss how classification should go beyond drill spacing alone. A practical conversation for geologists, resource modellers, and anyone involved in technical reporting.

This podcast at a glance:

00:45 – What is the 90/15 approach and how is it applied?

02:50 – Production volumes and how they link to confidence levels

05:00 – Why drill spacing alone isn't enough

06:50 – Conditional simulation and its role in classification

07:55 – Introduction to the scorecard method

10:50 – Strengths and subjectivity in the scorecard approach

11:45 – Real-world case study applying 90/15 and scorecards

13:00 – Final thoughts on classification beyond simple metrics

If you would like to contact Ian and Gregory: contact@snowdenoptiro.com

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This video version of this podcast is available on Snowden Optiro YouTube channel.

Snowden Optiro is a resources consulting and advisory group that provides independent advice, consulting and training to mining and exploration companies, their advisors and investors.

We help mine developers to advance their projects, mining companies to improve their operations and their professionals, and investors to de-risk their investments by the provision of quality advice, training and software in the field of Mineral Resources and Mineral/Ore Reserves.

Find out more at: https://snowdenoptiro.com Training: https://snowdenoptiro.com/professiona...

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