"Sampling is one of the basic operations of the human mind. It does not receive the attention it deserves"
Dr. Pierre Gy, Consulting Engineer
A geochemical survey will only be as good as the samples collected for analysis. The only way to ensure good sampling is to understand the material to be sampled and then provide adequate training to the people on the ground doing the work. This may require the involvement of specialist surficial geologists to help identify suitable material for sampling, or simply close monitoring of crews to ensure consistency and the collection of relevant metadata for the samples and sample sites. This level of detail is often overlooked, with dismissal of surficial samplers as "dirt baggers". Follow-up field checks are also often necessary to determine whether geochemical anomalies in surficial material are due to changes in material type, rather than the presence of mineralisation.