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For over 30 years, GDD have provided a broad technical consulting service, both operational and management, to all the areas of the resources industry. We have the knowledge and expertise to assist in the following areas:


  • Literature searches and data compilation
  • Surface exploration and drilling program design and management
  • Sampling and QA/QC analysis, standards and procedures
  • Data collection, management and analysis standards and procedures
  • Statistical and geostatistical analysis
  • Geological interpretation, modelling and evaluation
  • Resource estimation
    • JORC 2012 /  NI43-101 Compliant Reporting
    • Commodities
      • Gold / precious metals
      • Coal
      • Base metals
      • Iron ore
      • Phosphate
    • Exploration and resources auditing, due diligence and independent geologists reports





  • Mining geology mapping and sampling
  • Reserve estimation
  • Grade control design, implementation and review
  • Production tracking and monitoring
  • Production reporting
  • Reconciliation
    • Reserve model / blasthole grades / mill production
  • Grade control and  reserves auditing and due diligence studies


  • Geotechnical data collection and management
  • Environmental data collection and management