New insights into the genesis of willemite (Zn2SiO4) from zinc nonsulfide deposits, through trace elements and oxygen isotope geochemistry

•Willemite is a major mineral in ategory of the so-called “hypogene” nonsulfide Zn-Pb ores.•PCA of trace element concentrations distinguished willemites of different nature.•Distribution of trace elements matches with the willemite δ18O compositions.