Sampling & QA/QC

Lessons in Sampling & QA/QC

• Introduction to Sampling — Sampling is the foundation of all geological data collection. A representative sample is one that accurately reflects the characteristics of the material…
• Sample Collection Methods — Different sample collection methods are suited to different geological settings and objectives. Channel Sampling A continuous channel is cut…
• QA/QC Fundamentals — Quality Assurance and Quality Control QA/QC are essential for ensuring reliable assay data. The Purpose of QA/QC QA/QC programs detect: - Contamination…
• Implementing Blanks and Standards — Proper insertion and evaluation of blanks and standards is critical for data quality. Blank Sample Protocol Material Selection - Use certified barren…
• Duplicate Sample Analysis — Duplicate samples measure the precision and reproducibility of sampling and analytical procedures. Types of Duplicates Field Duplicates Second sample…
• Chain of Custody — Chain of custody documentation tracks samples from collection through final assay reporting. Purpose - Prevent sample tampering or loss - Enable audit…
• Laboratory Selection — Choosing the right laboratory is critical for obtaining reliable assay results. Key Criteria Accreditation - ISO 17025 accreditation required - Check…
• Data Management — Proper data management ensures sampling data remains reliable and accessible. Database Design Required Fields - Sample ID unique identifier - Sample type…
• Interpreting QA/QC Results — Regular analysis of QA/QC data is essential for maintaining data quality. Control Charts Standard Control Charts Plot standard results over time with: …
• Sampling Program Design — Designing an effective sampling program requires careful planning and clear objectives. Program Objectives Define the purpose: - Reconnaissance rapid…

Verification resources

Cross-check terminology, classification, methods, and safety with these authoritative external resources.

• Mineral Exploration Best Practice Guidelines — Canadian Institute of Mining, Metallurgy and Petroleum. Professional guidance for representative sampling, chain of custody, laboratories, security, and QA/QC.
• National Instrument 43-101 — British Columbia Securities Commission. Canadian mineral-project disclosure requirements and related technical-report framework.

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