Fluid inclusion and isotopic (C, H, O, S and Pb) constraints on the origin of Late Mesozoic vein-type W mineralization in Northern Guangdong, South China

•Shirenzhang, Meiziwo and Yaoling deposits are typical quartz-vein type wolframite deposits.•Fluids originated from magmatic fluid but modified by fluid-rock interaction and mixed with meteoric water.•The ore metals and sulfur were of magmatic origin.•Fluid boiling, fluid-rock interaction and minor input of meteoric water caused the precipitation of wolframite, cassiterite and scheelite.