The Pb-rich sulfide veins in the Boccassuolo ophiolite: Implications for the geochemical evolution of hydrothermal activity across the ocean-continent transition in the Ligurian Tethys (Northern-Apennine, Italy)

► Unusual Pb-rich sulfide veins in basalts of the Ligurian Tethys, Northern Apennine, Italy. ► Hydrothermal leaching of Pb-rich, Cu-poor basalt. ► The Pb/Cu as geotectonic indicator in ophiolite-hosted VMS deposits. ► Further evidence for the formation of the External Ligurides in the ocean-continent transition.