Mineral Resource Estimation by linear geostatistics – Module 2: multivariate context | Training course

This course provides a solid foundation in geostatistical methods for mineral resource estimation. The skills you will develop will assist you in:
– Estimating long-term and short-term resources,
– Producing resource models for mine design,
– Conducting spatial analysis of drillhole data.

It comprises two modules that can be taken separately:

• In Module 1, you will learn and practice the standard workflow for estimating resources in a univariate context. This module covers in-depth data analysis, detailed variographic analyses, block modeling, grade distribution interpolation using kriging, estimation validation, and unbiased grade-tonnage curves for short-term resources.
• This Module 2 allows you to progress into the multivariate context by exploring statistical tools such as Principal Component Analysis, applying kriging and co-kriging methods for estimating multi-element orebodies and obtaining multivariate models respecting the ratio between main metals, oxides, and elements.

– Use Principal Component Analysis (PCA) to extract the most relevant information from complex multivariate datasets.
– Estimate non-stationary variables by applying kriging with external drift or universal kriging for more accurate resource modeling.
– Analyze grade correlations to better understand elements’ relationships and enhance your geostatistical models.
– Examine joint spatial structure by calculating and interpreting cross-variograms and cross-covariances, even on purely heterotopic datasets.
– Interpolate correlated grades using advanced cokriging methods: ordinary cokriging, collocated cokriging, and rescaled cokriging.

• The course combines methodological presentations and practical exercises using a real data set to enhance the understanding of key concepts.
• Participants will engage in computer exercises with Isatis.neo Mining Edition.
• Course material and a temporary software license will be provided.

Professionals seeking a sound theoretical and practical knowledge of mining geostatistics. 

• A basic understanding of resource concepts such as grade, tonnage, and cut-off is recommended.
• To extend your knowledge, we recommend attending the complementary advanced short course Recoverable Resource Estimation.
• If you want to start with estimation in a univariate context, Module 1 of this course is recommended.