Petrogenesis of the Neoproterozoic West Highland Granitic Gneiss, Scottish Caledonides: Cryptic mantle input to S-type granites?

► We provide the first comprehensive elemental and isotopic study of these metamorphosed intrusions. ► They are derived by metasediment anatexis but have incorporated significant juvenile material. ► Restite entrainment and inefficient melt extraction are important influences on their primary geochemistry. ► Subsequent hydrothermal alteration has affected Sr and O isotope systems.