Designing Defensible QA/QC Protocols for JORC and NI 43-101 Mineral Reporting

The Mandate for Audit-Ready Analytical Data

Qualified Persons (QPs) and Competent Persons (CPs) require unequivocal analytical QA/QC data before signing off on mineral resource statements. Systematic contamination, calibration drift, or sample mix-ups can disqualify entire drilling programs.

Blind Quality Control Insertion Framework

RVA Labs enforces an uncompromised internal protocol alongside client blind submissions: minimum 4% certified reference materials (CRMs) matched to ore matrix, 3% barren coarse silica blanks to monitor crushing cleanliness, and 3% pulp duplicates to verify analytical precision.

Shewhart Control Charts & Failure Criteria

Every analytical batch is verified using Shewhart control charts. Any CRM result falling outside 3 standard deviations (±3SD) or two consecutive results outside ±2SD triggers an immediate re-assay of the entire 24-sample tray before Certificate of Analysis (CoA) sign-off.