Cut-off Grade (Lane)
Lane's Cut-off Grade Model, developed by Kenneth F. Lane and formalized in his 1988 book, provides a rigorous economic framework for determining the minimum grade at which ore should be mined and processed. It accounts for variable mining costs, metallurgical recovery, and commodity prices to optimize profit per unit processed. The model is foundational in mining economics and underpins daily operational decisions at thousands of mines worldwide.
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- Lane, K. F. (1988). The economic definition of ore: cutoff grades in theory and practice. Mining Journal Books, London. · URL
- Stewart, W. P., Michaud, D. E. (2011). Technical evaluation of mineral reserves. Society for Mining, Metallurgy & Exploration, Inc. · URL
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