Customers: mine geology and resource estimation consultants, technical services (site and corporate), mine geology departments, project and feasibility groups.

Capabilities:

1. ★Exploratory Data Analysis and domain validation through geostatistical testing - additivity issues, choice of variable of interest (2D-3D), data compositing and weighting issues;
   

2. ★Experimental Variography - dealing with outliers, treatment of clustering issues, and determination of directions of continuity;
   

3. ★Modelling Variograms - choice of models; determination of nugget effect;
   

4. ★Multivariate Variogram Modelling - calculating and modelling cross-variograms.
   

5. ★Implication and use of the properties of cokriging;
   

6. ★Non-Stationary Modelling;
   

7. ★Support Effect - deriving global distribution of block grades. Estimation of global recoverable resources, incorporation of information effect. Expansion to Multivariate settings;
   

8. ★Optimisation of drill spacing through global estimation variance analysis;
   

9. ★Dispersion variance analysis and primary characterisation of blending / stockpiling requirements;
   

10. ★Quantitative kriging neighbourhood analysis;
    

11. ★Cross-Validation of variogram models;
    

12. ★Kriging - simple, ordinary, universal, IRF-k. Production of estimates;
    

13. ★Local estimation of recoverable resources. Multiple indicator kriging techniques, service variables, gaussian disjunctive kriging, uniform conditioning and other non-linear estimates;
    

14. ★Building Confidence Intervals;
    

15. ★Conditional Simulations - simulation of grades and characterisation of uncertainties: utilisation in building Confidence Intervals, optimisation of blending and stockpiling requirements, conceptualisation of technical constraints in underground situation, risk assessment;
    

16. ★Simulation of geology and uncertainty on categorical variables (e.g. lithology);
    

17. ★Simulation of Geotechnical Variables (e.g. Fracture Densities).
    

Audit / Review of Resources / Reserves

Customers: mine geology and resource estimation consultants, technical services (site and corporate), mine site geology departments, project and feasibility groups.

Expertise: state-of-the-art knowledge of mining geostatistical techniques and mining processes, strong theoretical training backed up by 75 years combined professional experience. Ability to help companies with scoping out human resources needs/training requirements/technical propositions to achieve specific objectives of their resource estimation projects.

Capabilities: Access to world class experts (e.g. Henri Sanguinetti) to collaborate with Tenzing to conduct a specific and comprehensive Audit of Resources or Reserve Estimation for a range of commodities.