Charli Oliver

Charli Oliver

30 Seconds of Info from Paul Blackney – Principal Consultant: QAQC – Always evaluate the cause of any Certified Reference Material assay result outside of the certified three standard deviation grade range

  Always evaluate the cause of any Certified Reference Material (CRM) assay result outside of the certified three standard deviation grade range:  Statistically, less than three in each 1,000 results should be outside this range, making this protocol a useful…

30 Seconds of Info – resource estimation and evaluation – confidence in your resource categories

This week's 30 Seconds of Info is from Ian Glacken - Optiro Director of Geology and Principal Geology Consultant. Try to formalise the confidence in your resource categories: at least for a given deposit and/or commodity, try to communicate to all of the stakeholders what error (plus or minus, in metal terms) is meant by Measured, Indicated or Inferred Resources.