0c0c5f5c_ence_terms___Australian_Museum__Definition
[Term] Mineralisation: [Definition] 
an anomalous concentration of an element of economic importance within a rock body. Mineralisation may be visible to the naked eye (as is normally the case with base metals such as copper, lead and zinc) or invisible (as is normally the case with gold). The term mineralisation is a geological one and has no economic implications.
Glossary of geoscience terms - Australian Museum
Definition