Zinc is used in geochemical prospecting as a
pathfinder for various types of Zn mineralisation,
and is normally accompanied by Cd. Zinc in
association with Cd, Pb, etc. strongly suggests the
presence of Sedex or VHMS mineralisation.
Because of its strong chalcophile character, Cd
may be used to validate a questionable Zn
anomaly. Elevated Zn values more likely indicate
mafic rocks, or Fe/Mn co-precipitation.