PODCAST: Declustering… what is the true grade?

In this week’s Fresh Thinking podcast, Ian Glacken our Director of Geology, and Paul Blackney our Principal Consultant Geology discuss declustering and where to use it.

Declustering is a critical technique to understand and use when estimating a resource. It helps you get a more accurate picture of the whole ore body, but why is it controversial in parts of the industry?
In this podcast Ian and Paul discuss the technique and where to use it.

This podcast at a glance:

0:51 What is declustering and why is mining data clustered?
1:41 What are the implications of not declustering?
2:03 When is declustering useful?
2:52 Do we need to apply declustering to ordinary kriging?
3:26 What are some of the normal methods used when declustering?
5:12 So not everyone uses declustering. Why do some practitioners disavow it?
6:10 Do you both agree on when to apply declustering?
7:22 Are there any circumstances when its mandatory to decluster?
9:12 Where should people go to learn more?

For more information:


  • Declustering and debiasing (2005) Perch, M, Deutsch, C, University of Alberta Centre for Computational Geosciences
  • Applied mineral inventory estimation – Alastair J. Sinclair, University of British Columbia, Vancouver , Garston H. Blackwell, Queen’s University, Ontario

Fresh Thinking by Optiro. Fresh Thinking from the World of Mining.

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