Sampling soil, rock or sediment to map metal concentrations across a property.
The systematic collection and analysis of soil, rock, or water samples to detect anomalous concentrations of target elements. Geochemical surveys help identify areas of mineralization for follow-up drilling.
Geochemistry is cheap relative to drilling and narrows a large land package to a handful of targets. A coherent soil anomaly over a kilometre of strike is a far stronger case for drilling than a single high rock sample.