Production Sampling

Ongoing sampling during production monitors mill feed grade. Sample Points - Truck sampling random selection - Stockpile sampling - Conveyor belt sampling - Mill feed sampling Purposes - Confirm grade control predictions - Feed forward to mill - Monitor dilution - Reconciliation data Reconciliation Compare: - Grade control prediction - Mill head grade - Metal recovered Investigate discrepancies to improve future predictions.

All lessons in Open Pit Geology — Return to the complete Open Pit Geology course outline.
Previous lesson: Ore/Waste Delineation — Delineating ore from waste is the core function of grade control. Polygon Generation Inverse Distance Weight nearby samples by inverse of distance.
Next lesson: Geological Model Updates — The geological model must be regularly updated with new information. Data Sources - Blast hole assays - Face mapping - Production sampling - New drilling…

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 geological data, sampling, interpretation, security, and QA/QC.
The life cycle of a mineral deposit — U.S. Geological Survey. Scientific context for mineral deposits, extraction, processing, and reclamation.
Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines — CIM Mineral Resources & Mineral Reserves Committee. Professional Canadian guidance for sample support, data quality, model validation, reconciliation, and the documented comparison of estimates with production information.

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Production Sampling

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Verification resources