One of the most critical—and often misunderstood—concepts in mineral exploration is continuity . Continuity is the degree to which geological characteristics and mineral grades can be predicted between data points. It forms the foundation of geological modelling, Mineral Resource estimation, mine planning, and ultimately, investment confidence. However, continuity extends beyond grade alone. A robust resource model should evaluate:
🪨 Geological Continuity – Consistency of lithology, stratigraphy, structures, and alteration that can be traced between sample points with a high degree of confidence.
📊 Grade Continuity – Spatial distribution and predictability of mineral grades at two points separated by a given distance and direction.
🧭 Structural Continuity – Persistence of faults, folds, shear zones, and other structural controls.
⚒️ Mineralogical Continuity – Spatial consistency of ore minerals that influence processing and metallurgical recovery.
🏗️ Geotechnical Continuity – Rock mass characteristics that affect mine design and slope stability.
Importantly, continuity is deposit-specific .
A banded iron formation (BIF) or stratiform/well bedded limestone may exhibit excellent geological continuity, whereas vein-hosted gold and pegmatite-hosted lithium deposits often display complex geometry and highly variable grade distributions, requiring more detailed geological interpretation and closer drill spacing.
At Cedar Geosciences Ltd , we believe that reliable Mineral Resource estimates begin with a sound understanding of geological continuity. By integrating geological mapping, structural analysis, geochemistry, geophysics, and drilling data, we develop robust geological models that reduce uncertainty and support confident technical and investment decisions.
Every reliable resource model starts with one question: Can the geology be confidently projected beyond the sampled data?
We’d love to hear your perspective:
Which aspect of continuity has the greatest influence on your resource modelling projects—geology, grade, structure, mineralogy, or geotechnical conditions?
Image Credit: Deep drilling to establish continuity in a vein gold deposit, Big Bell, Western Australia (After Handley & Carrey 1990).