Risk Analysis and Mineral Resource Classification | Training course

Learn the techniques of conditional simulations applied to uncertainty assessment and how to use them for resource classification.


  • Learn the theory and practice of the various techniques of conditional simulations applied to continuous and categorical variables.
  • Learn how to process the simulation results for a comprehensive analysis of the uncertainties on the grades and geological facies.
  • Discover the practical and theoretical aspects of the different methods of mineral resource classification. Compare their pros and cons.

Key Features

  • Half of the course is devoted to methodological presentations, the second half to practical exercises on real-life cases to deepen the understanding of concepts. The focus is on illustrations and practical contributions of the covered concepts.
  • Computer exercises with Isatis.neo and Isatis.
  • Course material provided.

Who should attend

This course is aimed at geologists, engineers and others seeking a sound theoretical and practical knowledge of conditional simulations for mining applications.

Course content

  • Reminders of linear and non-linear geostatistics and their role in assessing uncertainty: dispersion variance, change of support, information effect, etc.
  • Full review of the conditional simulation methods available in Isatis.neo and Isatis:
    – Simulations of continuous variables: Turning Bands and Direct Block Simulations.
    – Simulations of categorical variables: Sequential Indicator Simulations.
  • Assessment of the uncertainties on estimated recoverable resources.
  • Review and comparison of the different resource classification methods: different criteria related to kriging and drilling mesh, confidence intervals calculated on simulations, Spatial Sampling Density Variance.
  • Case studies: assessing risk and uncertainty of estimated grades.


As the course refers to advanced geostatistical concepts, it is highly recommended that attendees have a solid knowledge of variography and kriging.

Registered professional members of AusIMM are eligible to claim 24 PD Hours when attending this short course.
Registered professional members of AusIMM are eligible to claim 24 PD Hours when attending this short course.